36 | * For devices with displays with a width of 720dp or greater, the sample log is always visible, 37 | * on other devices it's visibility is controlled by an item on the Action Bar. 38 | */ 39 | public class MainActivity extends SampleActivityBase { 40 | 41 | public static final String TAG = "MainActivity"; 42 | 43 | // Whether the Log Fragment is currently shown 44 | private boolean mLogShown; 45 | 46 | @Override 47 | protected void onCreate(Bundle savedInstanceState) { 48 | super.onCreate(savedInstanceState); 49 | setContentView(R.layout.activity_main); 50 | 51 | if (savedInstanceState == null) { 52 | FragmentTransaction transaction = getSupportFragmentManager().beginTransaction(); 53 | DragSourceFragment fragment = new DragSourceFragment(); 54 | transaction.replace(R.id.sample_content_fragment, fragment); 55 | transaction.commit(); 56 | } 57 | } 58 | 59 | @Override 60 | public boolean onCreateOptionsMenu(Menu menu) { 61 | getMenuInflater().inflate(R.menu.main, menu); 62 | return true; 63 | } 64 | 65 | @Override 66 | public boolean onPrepareOptionsMenu(Menu menu) { 67 | MenuItem logToggle = menu.findItem(R.id.menu_toggle_log); 68 | logToggle.setVisible(findViewById(R.id.sample_output) instanceof ViewAnimator); 69 | logToggle.setTitle(mLogShown ? R.string.sample_hide_log : R.string.sample_show_log); 70 | 71 | return super.onPrepareOptionsMenu(menu); 72 | } 73 | 74 | @Override 75 | public boolean onOptionsItemSelected(MenuItem item) { 76 | switch (item.getItemId()) { 77 | case R.id.menu_toggle_log: 78 | mLogShown = !mLogShown; 79 | ViewAnimator output = (ViewAnimator) findViewById(R.id.sample_output); 80 | if (mLogShown) { 81 | output.setDisplayedChild(1); 82 | } else { 83 | output.setDisplayedChild(0); 84 | } 85 | supportInvalidateOptionsMenu(); 86 | return true; 87 | } 88 | return super.onOptionsItemSelected(item); 89 | } 90 | 91 | /** Create a chain of targets that will receive log data */ 92 | @Override 93 | public void initializeLogging() { 94 | // Wraps Android's native log framework. 95 | LogWrapper logWrapper = new LogWrapper(); 96 | // Using Log, front-end to the logging chain, emulates android.util.log method signatures. 97 | Log.setLogNode(logWrapper); 98 | 99 | // Filter strips out everything except the message text. 100 | MessageOnlyLogFilter msgFilter = new MessageOnlyLogFilter(); 101 | logWrapper.setNext(msgFilter); 102 | 103 | // On screen logging via a fragment with a TextView. 104 | LogFragment logFragment = (LogFragment) getSupportFragmentManager() 105 | .findFragmentById(R.id.log_fragment); 106 | msgFilter.setNext(logFragment.getLogView()); 107 | 108 | Log.i(TAG, "Ready"); 109 | } 110 | } 111 | -------------------------------------------------------------------------------- /DropTarget/src/main/java/com/example/android/droptarget/MainActivity.java: -------------------------------------------------------------------------------- 1 | /* 2 | * Copyright 2013 The Android Open Source Project 3 | * 4 | * Licensed under the Apache License, Version 2.0 (the "License"); 5 | * you may not use this file except in compliance with the License. 6 | * You may obtain a copy of the License at 7 | * 8 | * http://www.apache.org/licenses/LICENSE-2.0 9 | * 10 | * Unless required by applicable law or agreed to in writing, software 11 | * distributed under the License is distributed on an "AS IS" BASIS, 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 | * See the License for the specific language governing permissions and 14 | * limitations under the License. 15 | */ 16 | 17 | 18 | package com.example.android.droptarget; 19 | 20 | import android.os.Bundle; 21 | import android.support.v4.app.FragmentTransaction; 22 | import android.view.Menu; 23 | import android.view.MenuItem; 24 | import android.widget.ViewAnimator; 25 | 26 | import com.example.android.common.activities.SampleActivityBase; 27 | import com.example.android.common.logger.Log; 28 | import com.example.android.common.logger.LogFragment; 29 | import com.example.android.common.logger.LogWrapper; 30 | import com.example.android.common.logger.MessageOnlyLogFilter; 31 | 32 | /** 33 | * A simple launcher activity containing a summary sample description, sample log and a custom 34 | * {@link android.support.v4.app.Fragment} which can display a view. 35 | *
36 | * For devices with displays with a width of 720dp or greater, the sample log is always visible, 37 | * on other devices it's visibility is controlled by an item on the Action Bar. 38 | */ 39 | public class MainActivity extends SampleActivityBase { 40 | 41 | public static final String TAG = "MainActivity"; 42 | 43 | // Whether the Log Fragment is currently shown 44 | private boolean mLogShown; 45 | 46 | @Override 47 | protected void onCreate(Bundle savedInstanceState) { 48 | super.onCreate(savedInstanceState); 49 | setContentView(R.layout.activity_main); 50 | 51 | if (savedInstanceState == null) { 52 | FragmentTransaction transaction = getSupportFragmentManager().beginTransaction(); 53 | DropTargetFragment fragment = new DropTargetFragment(); 54 | transaction.replace(R.id.sample_content_fragment, fragment); 55 | transaction.commit(); 56 | } 57 | } 58 | 59 | @Override 60 | public boolean onCreateOptionsMenu(Menu menu) { 61 | getMenuInflater().inflate(R.menu.main, menu); 62 | return true; 63 | } 64 | 65 | @Override 66 | public boolean onPrepareOptionsMenu(Menu menu) { 67 | MenuItem logToggle = menu.findItem(R.id.menu_toggle_log); 68 | logToggle.setVisible(findViewById(R.id.sample_output) instanceof ViewAnimator); 69 | logToggle.setTitle(mLogShown ? R.string.sample_hide_log : R.string.sample_show_log); 70 | 71 | return super.onPrepareOptionsMenu(menu); 72 | } 73 | 74 | @Override 75 | public boolean onOptionsItemSelected(MenuItem item) { 76 | switch(item.getItemId()) { 77 | case R.id.menu_toggle_log: 78 | mLogShown = !mLogShown; 79 | ViewAnimator output = (ViewAnimator) findViewById(R.id.sample_output); 80 | if (mLogShown) { 81 | output.setDisplayedChild(1); 82 | } else { 83 | output.setDisplayedChild(0); 84 | } 85 | supportInvalidateOptionsMenu(); 86 | return true; 87 | } 88 | return super.onOptionsItemSelected(item); 89 | } 90 | 91 | /** Create a chain of targets that will receive log data */ 92 | @Override 93 | public void initializeLogging() { 94 | // Wraps Android's native log framework. 95 | LogWrapper logWrapper = new LogWrapper(); 96 | // Using Log, front-end to the logging chain, emulates android.util.log method signatures. 97 | Log.setLogNode(logWrapper); 98 | 99 | // Filter strips out everything except the message text. 100 | MessageOnlyLogFilter msgFilter = new MessageOnlyLogFilter(); 101 | logWrapper.setNext(msgFilter); 102 | 103 | // On screen logging via a fragment with a TextView. 104 | LogFragment logFragment = (LogFragment) getSupportFragmentManager() 105 | .findFragmentById(R.id.log_fragment); 106 | msgFilter.setNext(logFragment.getLogView()); 107 | 108 | Log.i(TAG, "Ready"); 109 | } 110 | } 111 | -------------------------------------------------------------------------------- /DropTarget/src/main/java/com/example/android/common/logger/LogView.java: -------------------------------------------------------------------------------- 1 | /* 2 | * Copyright (C) 2013 The Android Open Source Project 3 | * 4 | * Licensed under the Apache License, Version 2.0 (the "License"); 5 | * you may not use this file except in compliance with the License. 6 | * You may obtain a copy of the License at 7 | * 8 | * http://www.apache.org/licenses/LICENSE-2.0 9 | * 10 | * Unless required by applicable law or agreed to in writing, software 11 | * distributed under the License is distributed on an "AS IS" BASIS, 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 | * See the License for the specific language governing permissions and 14 | * limitations under the License. 15 | */ 16 | package com.example.android.common.logger; 17 | 18 | import android.app.Activity; 19 | import android.content.Context; 20 | import android.util.*; 21 | import android.widget.TextView; 22 | 23 | /** Simple TextView which is used to output log data received through the LogNode interface. 24 | */ 25 | public class LogView extends TextView implements LogNode { 26 | 27 | public LogView(Context context) { 28 | super(context); 29 | } 30 | 31 | public LogView(Context context, AttributeSet attrs) { 32 | super(context, attrs); 33 | } 34 | 35 | public LogView(Context context, AttributeSet attrs, int defStyle) { 36 | super(context, attrs, defStyle); 37 | } 38 | 39 | /** 40 | * Formats the log data and prints it out to the LogView. 41 | * @param priority Log level of the data being logged. Verbose, Error, etc. 42 | * @param tag Tag for for the log data. Can be used to organize log statements. 43 | * @param msg The actual message to be logged. The actual message to be logged. 44 | * @param tr If an exception was thrown, this can be sent along for the logging facilities 45 | * to extract and print useful information. 46 | */ 47 | @Override 48 | public void println(int priority, String tag, String msg, Throwable tr) { 49 | 50 | 51 | String priorityStr = null; 52 | 53 | // For the purposes of this View, we want to print the priority as readable text. 54 | switch(priority) { 55 | case android.util.Log.VERBOSE: 56 | priorityStr = "VERBOSE"; 57 | break; 58 | case android.util.Log.DEBUG: 59 | priorityStr = "DEBUG"; 60 | break; 61 | case android.util.Log.INFO: 62 | priorityStr = "INFO"; 63 | break; 64 | case android.util.Log.WARN: 65 | priorityStr = "WARN"; 66 | break; 67 | case android.util.Log.ERROR: 68 | priorityStr = "ERROR"; 69 | break; 70 | case android.util.Log.ASSERT: 71 | priorityStr = "ASSERT"; 72 | break; 73 | default: 74 | break; 75 | } 76 | 77 | // Handily, the Log class has a facility for converting a stack trace into a usable string. 78 | String exceptionStr = null; 79 | if (tr != null) { 80 | exceptionStr = android.util.Log.getStackTraceString(tr); 81 | } 82 | 83 | // Take the priority, tag, message, and exception, and concatenate as necessary 84 | // into one usable line of text. 85 | final StringBuilder outputBuilder = new StringBuilder(); 86 | 87 | String delimiter = "\t"; 88 | appendIfNotNull(outputBuilder, priorityStr, delimiter); 89 | appendIfNotNull(outputBuilder, tag, delimiter); 90 | appendIfNotNull(outputBuilder, msg, delimiter); 91 | appendIfNotNull(outputBuilder, exceptionStr, delimiter); 92 | 93 | // In case this was originally called from an AsyncTask or some other off-UI thread, 94 | // make sure the update occurs within the UI thread. 95 | ((Activity) getContext()).runOnUiThread( (new Thread(new Runnable() { 96 | @Override 97 | public void run() { 98 | // Display the text we just generated within the LogView. 99 | appendToLog(outputBuilder.toString()); 100 | } 101 | }))); 102 | 103 | if (mNext != null) { 104 | mNext.println(priority, tag, msg, tr); 105 | } 106 | } 107 | 108 | public LogNode getNext() { 109 | return mNext; 110 | } 111 | 112 | public void setNext(LogNode node) { 113 | mNext = node; 114 | } 115 | 116 | /** Takes a string and adds to it, with a separator, if the bit to be added isn't null. Since 117 | * the logger takes so many arguments that might be null, this method helps cut out some of the 118 | * agonizing tedium of writing the same 3 lines over and over. 119 | * @param source StringBuilder containing the text to append to. 120 | * @param addStr The String to append 121 | * @param delimiter The String to separate the source and appended strings. A tab or comma, 122 | * for instance. 123 | * @return The fully concatenated String as a StringBuilder 124 | */ 125 | private StringBuilder appendIfNotNull(StringBuilder source, String addStr, String delimiter) { 126 | if (addStr != null) { 127 | if (addStr.length() == 0) { 128 | delimiter = ""; 129 | } 130 | 131 | return source.append(addStr).append(delimiter); 132 | } 133 | return source; 134 | } 135 | 136 | // The next LogNode in the chain. 137 | LogNode mNext; 138 | 139 | /** Outputs the string as a new line of log data in the LogView. */ 140 | public void appendToLog(String s) { 141 | append("\n" + s); 142 | } 143 | 144 | 145 | } 146 | -------------------------------------------------------------------------------- /gradlew: -------------------------------------------------------------------------------- 1 | #!/usr/bin/env bash 2 | 3 | ############################################################################## 4 | ## 5 | ## Gradle start up script for UN*X 6 | ## 7 | ############################################################################## 8 | 9 | # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. 10 | DEFAULT_JVM_OPTS="" 11 | 12 | APP_NAME="Gradle" 13 | APP_BASE_NAME=`basename "$0"` 14 | 15 | # Use the maximum available, or set MAX_FD != -1 to use that value. 16 | MAX_FD="maximum" 17 | 18 | warn ( ) { 19 | echo "$*" 20 | } 21 | 22 | die ( ) { 23 | echo 24 | echo "$*" 25 | echo 26 | exit 1 27 | } 28 | 29 | # OS specific support (must be 'true' or 'false'). 30 | cygwin=false 31 | msys=false 32 | darwin=false 33 | case "`uname`" in 34 | CYGWIN* ) 35 | cygwin=true 36 | ;; 37 | Darwin* ) 38 | darwin=true 39 | ;; 40 | MINGW* ) 41 | msys=true 42 | ;; 43 | esac 44 | 45 | # For Cygwin, ensure paths are in UNIX format before anything is touched. 46 | if $cygwin ; then 47 | [ -n "$JAVA_HOME" ] && JAVA_HOME=`cygpath --unix "$JAVA_HOME"` 48 | fi 49 | 50 | # Attempt to set APP_HOME 51 | # Resolve links: $0 may be a link 52 | PRG="$0" 53 | # Need this for relative symlinks. 54 | while [ -h "$PRG" ] ; do 55 | ls=`ls -ld "$PRG"` 56 | link=`expr "$ls" : '.*-> \(.*\)$'` 57 | if expr "$link" : '/.*' > /dev/null; then 58 | PRG="$link" 59 | else 60 | PRG=`dirname "$PRG"`"/$link" 61 | fi 62 | done 63 | SAVED="`pwd`" 64 | cd "`dirname \"$PRG\"`/" >&- 65 | APP_HOME="`pwd -P`" 66 | cd "$SAVED" >&- 67 | 68 | CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar 69 | 70 | # Determine the Java command to use to start the JVM. 71 | if [ -n "$JAVA_HOME" ] ; then 72 | if [ -x "$JAVA_HOME/jre/sh/java" ] ; then 73 | # IBM's JDK on AIX uses strange locations for the executables 74 | JAVACMD="$JAVA_HOME/jre/sh/java" 75 | else 76 | JAVACMD="$JAVA_HOME/bin/java" 77 | fi 78 | if [ ! -x "$JAVACMD" ] ; then 79 | die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME 80 | 81 | Please set the JAVA_HOME variable in your environment to match the 82 | location of your Java installation." 83 | fi 84 | else 85 | JAVACMD="java" 86 | which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 87 | 88 | Please set the JAVA_HOME variable in your environment to match the 89 | location of your Java installation." 90 | fi 91 | 92 | # Increase the maximum file descriptors if we can. 93 | if [ "$cygwin" = "false" -a "$darwin" = "false" ] ; then 94 | MAX_FD_LIMIT=`ulimit -H -n` 95 | if [ $? -eq 0 ] ; then 96 | if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then 97 | MAX_FD="$MAX_FD_LIMIT" 98 | fi 99 | ulimit -n $MAX_FD 100 | if [ $? -ne 0 ] ; then 101 | warn "Could not set maximum file descriptor limit: $MAX_FD" 102 | fi 103 | else 104 | warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT" 105 | fi 106 | fi 107 | 108 | # For Darwin, add options to specify how the application appears in the dock 109 | if $darwin; then 110 | GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\"" 111 | fi 112 | 113 | # For Cygwin, switch paths to Windows format before running java 114 | if $cygwin ; then 115 | APP_HOME=`cygpath --path --mixed "$APP_HOME"` 116 | CLASSPATH=`cygpath --path --mixed "$CLASSPATH"` 117 | 118 | # We build the pattern for arguments to be converted via cygpath 119 | ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null` 120 | SEP="" 121 | for dir in $ROOTDIRSRAW ; do 122 | ROOTDIRS="$ROOTDIRS$SEP$dir" 123 | SEP="|" 124 | done 125 | OURCYGPATTERN="(^($ROOTDIRS))" 126 | # Add a user-defined pattern to the cygpath arguments 127 | if [ "$GRADLE_CYGPATTERN" != "" ] ; then 128 | OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)" 129 | fi 130 | # Now convert the arguments - kludge to limit ourselves to /bin/sh 131 | i=0 132 | for arg in "$@" ; do 133 | CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -` 134 | CHECK2=`echo "$arg"|egrep -c "^-"` ### Determine if an option 135 | 136 | if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then ### Added a condition 137 | eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"` 138 | else 139 | eval `echo args$i`="\"$arg\"" 140 | fi 141 | i=$((i+1)) 142 | done 143 | case $i in 144 | (0) set -- ;; 145 | (1) set -- "$args0" ;; 146 | (2) set -- "$args0" "$args1" ;; 147 | (3) set -- "$args0" "$args1" "$args2" ;; 148 | (4) set -- "$args0" "$args1" "$args2" "$args3" ;; 149 | (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;; 150 | (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;; 151 | (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;; 152 | (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;; 153 | (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;; 154 | esac 155 | fi 156 | 157 | # Split up the JVM_OPTS And GRADLE_OPTS values into an array, following the shell quoting and substitution rules 158 | function splitJvmOpts() { 159 | JVM_OPTS=("$@") 160 | } 161 | eval splitJvmOpts $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS 162 | JVM_OPTS[${#JVM_OPTS[*]}]="-Dorg.gradle.appname=$APP_BASE_NAME" 163 | 164 | exec "$JAVACMD" "${JVM_OPTS[@]}" -classpath "$CLASSPATH" org.gradle.wrapper.GradleWrapperMain "$@" 165 | -------------------------------------------------------------------------------- /DragSource/src/main/java/com/example/android/common/logger/LogView.java: -------------------------------------------------------------------------------- 1 | /* 2 | * Copyright (C) 2013 The Android Open Source Project 3 | * 4 | * Licensed under the Apache License, Version 2.0 (the "License"); 5 | * you may not use this file except in compliance with the License. 6 | * You may obtain a copy of the License at 7 | * 8 | * http://www.apache.org/licenses/LICENSE-2.0 9 | * 10 | * Unless required by applicable law or agreed to in writing, software 11 | * distributed under the License is distributed on an "AS IS" BASIS, 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 | * See the License for the specific language governing permissions and 14 | * limitations under the License. 15 | */ 16 | package com.example.android.common.logger; 17 | 18 | import android.app.Activity; 19 | import android.content.Context; 20 | import android.util.AttributeSet; 21 | import android.widget.TextView; 22 | 23 | /** 24 | * Simple TextView which is used to output log data received through the LogNode interface. 25 | */ 26 | public class LogView extends TextView implements LogNode { 27 | 28 | public LogView(Context context) { 29 | super(context); 30 | } 31 | 32 | public LogView(Context context, AttributeSet attrs) { 33 | super(context, attrs); 34 | } 35 | 36 | public LogView(Context context, AttributeSet attrs, int defStyle) { 37 | super(context, attrs, defStyle); 38 | } 39 | 40 | /** 41 | * Formats the log data and prints it out to the LogView. 42 | * 43 | * @param priority Log level of the data being logged. Verbose, Error, etc. 44 | * @param tag Tag for for the log data. Can be used to organize log statements. 45 | * @param msg The actual message to be logged. The actual message to be logged. 46 | * @param tr If an exception was thrown, this can be sent along for the logging 47 | * facilities 48 | * to extract and print useful information. 49 | */ 50 | @Override 51 | public void println(int priority, String tag, String msg, Throwable tr) { 52 | 53 | String priorityStr = null; 54 | 55 | // For the purposes of this View, we want to print the priority as readable text. 56 | switch (priority) { 57 | case android.util.Log.VERBOSE: 58 | priorityStr = "VERBOSE"; 59 | break; 60 | case android.util.Log.DEBUG: 61 | priorityStr = "DEBUG"; 62 | break; 63 | case android.util.Log.INFO: 64 | priorityStr = "INFO"; 65 | break; 66 | case android.util.Log.WARN: 67 | priorityStr = "WARN"; 68 | break; 69 | case android.util.Log.ERROR: 70 | priorityStr = "ERROR"; 71 | break; 72 | case android.util.Log.ASSERT: 73 | priorityStr = "ASSERT"; 74 | break; 75 | default: 76 | break; 77 | } 78 | 79 | // Handily, the Log class has a facility for converting a stack trace into a usable string. 80 | String exceptionStr = null; 81 | if (tr != null) { 82 | exceptionStr = android.util.Log.getStackTraceString(tr); 83 | } 84 | 85 | // Take the priority, tag, message, and exception, and concatenate as necessary 86 | // into one usable line of text. 87 | final StringBuilder outputBuilder = new StringBuilder(); 88 | 89 | String delimiter = "\t"; 90 | appendIfNotNull(outputBuilder, priorityStr, delimiter); 91 | appendIfNotNull(outputBuilder, tag, delimiter); 92 | appendIfNotNull(outputBuilder, msg, delimiter); 93 | appendIfNotNull(outputBuilder, exceptionStr, delimiter); 94 | 95 | // In case this was originally called from an AsyncTask or some other off-UI thread, 96 | // make sure the update occurs within the UI thread. 97 | ((Activity) getContext()).runOnUiThread((new Thread(new Runnable() { 98 | @Override 99 | public void run() { 100 | // Display the text we just generated within the LogView. 101 | appendToLog(outputBuilder.toString()); 102 | } 103 | }))); 104 | 105 | if (mNext != null) { 106 | mNext.println(priority, tag, msg, tr); 107 | } 108 | } 109 | 110 | public LogNode getNext() { 111 | return mNext; 112 | } 113 | 114 | public void setNext(LogNode node) { 115 | mNext = node; 116 | } 117 | 118 | /** 119 | * Takes a string and adds to it, with a separator, if the bit to be added isn't null. Since 120 | * the logger takes so many arguments that might be null, this method helps cut out some of the 121 | * agonizing tedium of writing the same 3 lines over and over. 122 | * 123 | * @param source StringBuilder containing the text to append to. 124 | * @param addStr The String to append 125 | * @param delimiter The String to separate the source and appended strings. A tab or comma, 126 | * for instance. 127 | * @return The fully concatenated String as a StringBuilder 128 | */ 129 | private StringBuilder appendIfNotNull(StringBuilder source, String addStr, String delimiter) { 130 | if (addStr != null) { 131 | if (addStr.length() == 0) { 132 | delimiter = ""; 133 | } 134 | 135 | return source.append(addStr).append(delimiter); 136 | } 137 | return source; 138 | } 139 | 140 | // The next LogNode in the chain. 141 | LogNode mNext; 142 | 143 | /** Outputs the string as a new line of log data in the LogView. */ 144 | public void appendToLog(String s) { 145 | append("\n" + s); 146 | } 147 | 148 | 149 | } 150 | -------------------------------------------------------------------------------- /DropTarget/src/main/java/com/example/android/droptarget/DropTargetFragment.java: -------------------------------------------------------------------------------- 1 | /* 2 | * Copyright (C) 2016 The Android Open Source Project 3 | * 4 | * Licensed under the Apache License, Version 2.0 (the "License"); 5 | * you may not use this file except in compliance with the License. 6 | * You may obtain a copy of the License at 7 | * 8 | * http://www.apache.org/licenses/LICENSE-2.0 9 | * 10 | * Unless required by applicable law or agreed to in writing, software 11 | * distributed under the License is distributed on an "AS IS" BASIS, 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 | * See the License for the specific language governing permissions and 14 | * limitations under the License. 15 | */ 16 | 17 | package com.example.android.droptarget; 18 | 19 | import com.example.android.common.logger.Log; 20 | 21 | import android.app.Activity; 22 | import android.content.ClipDescription; 23 | import android.content.ContentResolver; 24 | import android.net.Uri; 25 | import android.os.Bundle; 26 | import android.os.PersistableBundle; 27 | import android.support.annotation.Nullable; 28 | import android.support.v13.app.ActivityCompat; 29 | import android.support.v13.view.DragAndDropPermissionsCompat; 30 | import android.support.v4.app.Fragment; 31 | import android.view.DragEvent; 32 | import android.view.LayoutInflater; 33 | import android.view.View; 34 | import android.view.ViewGroup; 35 | import android.widget.CheckBox; 36 | import android.widget.ImageView; 37 | 38 | /** 39 | * This sample demonstrates data can be moved between views in different applications via 40 | * drag and drop. 41 | *
This is the Target app for the drag and drop process. This app uses a 42 | * {@link android.widget.ImageView} as the drop target. Images onto this 43 | * view from the DragSource app that is also part of this sample. 44 | *
45 | * There is also a {@link android.widget.EditText} widget that can accept dropped text (no 46 | * extra setup is necessary). 47 | * To access content URIs requiring permissions, the target app needs to request the 48 | * {@link android.view.DragAndDropPermissions} from the Activity via 49 | * {@link ActivityCompat#requestDragAndDropPermissions(Activity, DragEvent)}. This permission will 50 | * stay either as long as the activity is alive, or until the release() method is called on the 51 | * {@link android.view.DragAndDropPermissions} object. 52 | */ 53 | public class DropTargetFragment extends Fragment { 54 | 55 | private static final String IMAGE_URI = "IMAGE_URI"; 56 | 57 | public static final String EXTRA_IMAGE_INFO = "IMAGE_INFO"; 58 | 59 | private static final String TAG = "DropTargetFragment"; 60 | 61 | private Uri mImageUri; 62 | 63 | private CheckBox mReleasePermissionCheckBox; 64 | 65 | @Nullable 66 | @Override 67 | public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, 68 | @Nullable Bundle savedInstanceState) { 69 | 70 | View rootView = inflater.inflate(R.layout.fragment_droptarget, container, false); 71 | final ImageView imageView = (ImageView) rootView.findViewById(R.id.image_target); 72 | 73 | ImageDragListener imageDragListener = new PermissionAwareImageDragListener(); 74 | 75 | imageView.setOnDragListener(imageDragListener); 76 | 77 | // Restore the application state if an image was being displayed. 78 | if (savedInstanceState != null) { 79 | final String uriString = savedInstanceState.getString(IMAGE_URI); 80 | if (uriString != null) { 81 | mImageUri = Uri.parse(uriString); 82 | imageView.setImageURI(mImageUri); 83 | } 84 | } 85 | 86 | mReleasePermissionCheckBox = (CheckBox) rootView.findViewById(R.id.release_checkbox); 87 | 88 | return rootView; 89 | } 90 | 91 | @Override 92 | public void onSaveInstanceState(Bundle savedInstanceState) { 93 | if (mImageUri != null) { 94 | savedInstanceState.putString(IMAGE_URI, mImageUri.toString()); 95 | } 96 | super.onSaveInstanceState(savedInstanceState); 97 | } 98 | 99 | private class PermissionAwareImageDragListener extends ImageDragListener { 100 | 101 | @Override 102 | protected void processLocation(float x, float y) { 103 | // Callback is received when the dragged image enters the drop area. 104 | } 105 | 106 | @Override 107 | protected boolean setImageUri(View view, DragEvent event, Uri uri) { 108 | // Read the string from the clip description extras. 109 | Log.d(TAG, "ClipDescription extra: " + getExtra(event)); 110 | 111 | Log.d(TAG, "Setting image source to: " + uri.toString()); 112 | mImageUri = uri; 113 | 114 | if (ContentResolver.SCHEME_CONTENT.equals(uri.getScheme())) { 115 | // Accessing a "content" scheme Uri requires a permission grant. 116 | DragAndDropPermissionsCompat dropPermissions = ActivityCompat 117 | .requestDragAndDropPermissions(getActivity(), event); 118 | Log.d(TAG, "Requesting permissions."); 119 | 120 | if (dropPermissions == null) { 121 | // Permission could not be obtained. 122 | Log.d(TAG, "Drop permission request failed."); 123 | return false; 124 | } 125 | 126 | final boolean result = super.setImageUri(view, event, uri); 127 | 128 | if (mReleasePermissionCheckBox.isChecked()) { 129 | /* Release the permissions if you are done with the URI. 130 | Note that you may need to hold onto the permission until later if other 131 | operations are performed on the content. For instance, releasing the 132 | permissions here will prevent onCreateView from properly restoring the 133 | ImageView state. 134 | If permissions are not explicitly released, the permission grant will be 135 | revoked when the activity is destroyed. 136 | */ 137 | dropPermissions.release(); 138 | Log.d(TAG, "Permissions released."); 139 | } 140 | 141 | return result; 142 | } else { 143 | // Other schemes (such as "android.resource") do not require a permission grant. 144 | return super.setImageUri(view, event, uri); 145 | } 146 | } 147 | 148 | @Override 149 | public boolean onDrag(View view, DragEvent event) { 150 | // DragTarget is peeking into the MIME types of the dragged event in order to ignore 151 | // non-image drags completely. 152 | // DragSource does not do that but rejects non-image content once a drop has happened. 153 | ClipDescription clipDescription = event.getClipDescription(); 154 | if (clipDescription != null && !clipDescription.hasMimeType("image/*")) { 155 | return false; 156 | } 157 | // Callback received when image is being dragged. 158 | return super.onDrag(view, event); 159 | } 160 | } 161 | 162 | /** 163 | * DragEvents can contain additional data packaged in a {@link PersistableBundle}. 164 | * Extract the extras from the event and return the String stored for the 165 | * {@link #EXTRA_IMAGE_INFO} entry. 166 | */ 167 | private String getExtra(DragEvent event) { 168 | // The extras are contained in the ClipDescription in the DragEvent. 169 | ClipDescription clipDescription = event.getClipDescription(); 170 | if (clipDescription != null) { 171 | PersistableBundle extras = clipDescription.getExtras(); 172 | if (extras != null) { 173 | return extras.getString(EXTRA_IMAGE_INFO); 174 | } 175 | } 176 | return null; 177 | } 178 | } 179 | -------------------------------------------------------------------------------- /DropTarget/src/main/java/com/example/android/common/logger/Log.java: -------------------------------------------------------------------------------- 1 | /* 2 | * Copyright (C) 2013 The Android Open Source Project 3 | * 4 | * Licensed under the Apache License, Version 2.0 (the "License"); 5 | * you may not use this file except in compliance with the License. 6 | * You may obtain a copy of the License at 7 | * 8 | * http://www.apache.org/licenses/LICENSE-2.0 9 | * 10 | * Unless required by applicable law or agreed to in writing, software 11 | * distributed under the License is distributed on an "AS IS" BASIS, 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 | * See the License for the specific language governing permissions and 14 | * limitations under the License. 15 | */ 16 | package com.example.android.common.logger; 17 | 18 | /** 19 | * Helper class for a list (or tree) of LoggerNodes. 20 | * 21 | *
When this is set as the head of the list, 22 | * an instance of it can function as a drop-in replacement for {@link android.util.Log}. 23 | * Most of the methods in this class server only to map a method call in Log to its equivalent 24 | * in LogNode.
25 | */ 26 | public class Log { 27 | // Grabbing the native values from Android's native logging facilities, 28 | // to make for easy migration and interop. 29 | public static final int NONE = -1; 30 | public static final int VERBOSE = android.util.Log.VERBOSE; 31 | public static final int DEBUG = android.util.Log.DEBUG; 32 | public static final int INFO = android.util.Log.INFO; 33 | public static final int WARN = android.util.Log.WARN; 34 | public static final int ERROR = android.util.Log.ERROR; 35 | public static final int ASSERT = android.util.Log.ASSERT; 36 | 37 | // Stores the beginning of the LogNode topology. 38 | private static LogNode mLogNode; 39 | 40 | /** 41 | * Returns the next LogNode in the linked list. 42 | */ 43 | public static LogNode getLogNode() { 44 | return mLogNode; 45 | } 46 | 47 | /** 48 | * Sets the LogNode data will be sent to. 49 | */ 50 | public static void setLogNode(LogNode node) { 51 | mLogNode = node; 52 | } 53 | 54 | /** 55 | * Instructs the LogNode to print the log data provided. Other LogNodes can 56 | * be chained to the end of the LogNode as desired. 57 | * 58 | * @param priority Log level of the data being logged. Verbose, Error, etc. 59 | * @param tag Tag for for the log data. Can be used to organize log statements. 60 | * @param msg The actual message to be logged. 61 | * @param tr If an exception was thrown, this can be sent along for the logging facilities 62 | * to extract and print useful information. 63 | */ 64 | public static void println(int priority, String tag, String msg, Throwable tr) { 65 | if (mLogNode != null) { 66 | mLogNode.println(priority, tag, msg, tr); 67 | } 68 | } 69 | 70 | /** 71 | * Instructs the LogNode to print the log data provided. Other LogNodes can 72 | * be chained to the end of the LogNode as desired. 73 | * 74 | * @param priority Log level of the data being logged. Verbose, Error, etc. 75 | * @param tag Tag for for the log data. Can be used to organize log statements. 76 | * @param msg The actual message to be logged. The actual message to be logged. 77 | */ 78 | public static void println(int priority, String tag, String msg) { 79 | println(priority, tag, msg, null); 80 | } 81 | 82 | /** 83 | * Prints a message at VERBOSE priority. 84 | * 85 | * @param tag Tag for for the log data. Can be used to organize log statements. 86 | * @param msg The actual message to be logged. 87 | * @param tr If an exception was thrown, this can be sent along for the logging facilities 88 | * to extract and print useful information. 89 | */ 90 | public static void v(String tag, String msg, Throwable tr) { 91 | println(VERBOSE, tag, msg, tr); 92 | } 93 | 94 | /** 95 | * Prints a message at VERBOSE priority. 96 | * 97 | * @param tag Tag for for the log data. Can be used to organize log statements. 98 | * @param msg The actual message to be logged. 99 | */ 100 | public static void v(String tag, String msg) { 101 | v(tag, msg, null); 102 | } 103 | 104 | 105 | /** 106 | * Prints a message at DEBUG priority. 107 | * 108 | * @param tag Tag for for the log data. Can be used to organize log statements. 109 | * @param msg The actual message to be logged. 110 | * @param tr If an exception was thrown, this can be sent along for the logging facilities 111 | * to extract and print useful information. 112 | */ 113 | public static void d(String tag, String msg, Throwable tr) { 114 | println(DEBUG, tag, msg, tr); 115 | } 116 | 117 | /** 118 | * Prints a message at DEBUG priority. 119 | * 120 | * @param tag Tag for for the log data. Can be used to organize log statements. 121 | * @param msg The actual message to be logged. 122 | */ 123 | public static void d(String tag, String msg) { 124 | d(tag, msg, null); 125 | } 126 | 127 | /** 128 | * Prints a message at INFO priority. 129 | * 130 | * @param tag Tag for for the log data. Can be used to organize log statements. 131 | * @param msg The actual message to be logged. 132 | * @param tr If an exception was thrown, this can be sent along for the logging facilities 133 | * to extract and print useful information. 134 | */ 135 | public static void i(String tag, String msg, Throwable tr) { 136 | println(INFO, tag, msg, tr); 137 | } 138 | 139 | /** 140 | * Prints a message at INFO priority. 141 | * 142 | * @param tag Tag for for the log data. Can be used to organize log statements. 143 | * @param msg The actual message to be logged. 144 | */ 145 | public static void i(String tag, String msg) { 146 | i(tag, msg, null); 147 | } 148 | 149 | /** 150 | * Prints a message at WARN priority. 151 | * 152 | * @param tag Tag for for the log data. Can be used to organize log statements. 153 | * @param msg The actual message to be logged. 154 | * @param tr If an exception was thrown, this can be sent along for the logging facilities 155 | * to extract and print useful information. 156 | */ 157 | public static void w(String tag, String msg, Throwable tr) { 158 | println(WARN, tag, msg, tr); 159 | } 160 | 161 | /** 162 | * Prints a message at WARN priority. 163 | * 164 | * @param tag Tag for for the log data. Can be used to organize log statements. 165 | * @param msg The actual message to be logged. 166 | */ 167 | public static void w(String tag, String msg) { 168 | w(tag, msg, null); 169 | } 170 | 171 | /** 172 | * Prints a message at WARN priority. 173 | * 174 | * @param tag Tag for for the log data. Can be used to organize log statements. 175 | * @param tr If an exception was thrown, this can be sent along for the logging facilities 176 | * to extract and print useful information. 177 | */ 178 | public static void w(String tag, Throwable tr) { 179 | w(tag, null, tr); 180 | } 181 | 182 | /** 183 | * Prints a message at ERROR priority. 184 | * 185 | * @param tag Tag for for the log data. Can be used to organize log statements. 186 | * @param msg The actual message to be logged. 187 | * @param tr If an exception was thrown, this can be sent along for the logging facilities 188 | * to extract and print useful information. 189 | */ 190 | public static void e(String tag, String msg, Throwable tr) { 191 | println(ERROR, tag, msg, tr); 192 | } 193 | 194 | /** 195 | * Prints a message at ERROR priority. 196 | * 197 | * @param tag Tag for for the log data. Can be used to organize log statements. 198 | * @param msg The actual message to be logged. 199 | */ 200 | public static void e(String tag, String msg) { 201 | e(tag, msg, null); 202 | } 203 | 204 | /** 205 | * Prints a message at ASSERT priority. 206 | * 207 | * @param tag Tag for for the log data. Can be used to organize log statements. 208 | * @param msg The actual message to be logged. 209 | * @param tr If an exception was thrown, this can be sent along for the logging facilities 210 | * to extract and print useful information. 211 | */ 212 | public static void wtf(String tag, String msg, Throwable tr) { 213 | println(ASSERT, tag, msg, tr); 214 | } 215 | 216 | /** 217 | * Prints a message at ASSERT priority. 218 | * 219 | * @param tag Tag for for the log data. Can be used to organize log statements. 220 | * @param msg The actual message to be logged. 221 | */ 222 | public static void wtf(String tag, String msg) { 223 | wtf(tag, msg, null); 224 | } 225 | 226 | /** 227 | * Prints a message at ASSERT priority. 228 | * 229 | * @param tag Tag for for the log data. Can be used to organize log statements. 230 | * @param tr If an exception was thrown, this can be sent along for the logging facilities 231 | * to extract and print useful information. 232 | */ 233 | public static void wtf(String tag, Throwable tr) { 234 | wtf(tag, null, tr); 235 | } 236 | } 237 | -------------------------------------------------------------------------------- /DragSource/src/main/java/com/example/android/common/logger/Log.java: -------------------------------------------------------------------------------- 1 | /* 2 | * Copyright (C) 2013 The Android Open Source Project 3 | * 4 | * Licensed under the Apache License, Version 2.0 (the "License"); 5 | * you may not use this file except in compliance with the License. 6 | * You may obtain a copy of the License at 7 | * 8 | * http://www.apache.org/licenses/LICENSE-2.0 9 | * 10 | * Unless required by applicable law or agreed to in writing, software 11 | * distributed under the License is distributed on an "AS IS" BASIS, 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 | * See the License for the specific language governing permissions and 14 | * limitations under the License. 15 | */ 16 | package com.example.android.common.logger; 17 | 18 | /** 19 | * Helper class for a list (or tree) of LoggerNodes. 20 | * 21 | *When this is set as the head of the list, 22 | * an instance of it can function as a drop-in replacement for {@link android.util.Log}. 23 | * Most of the methods in this class server only to map a method call in Log to its equivalent 24 | * in LogNode.
25 | */ 26 | public class Log { 27 | 28 | // Grabbing the native values from Android's native logging facilities, 29 | // to make for easy migration and interop. 30 | public static final int NONE = -1; 31 | 32 | public static final int VERBOSE = android.util.Log.VERBOSE; 33 | 34 | public static final int DEBUG = android.util.Log.DEBUG; 35 | 36 | public static final int INFO = android.util.Log.INFO; 37 | 38 | public static final int WARN = android.util.Log.WARN; 39 | 40 | public static final int ERROR = android.util.Log.ERROR; 41 | 42 | public static final int ASSERT = android.util.Log.ASSERT; 43 | 44 | // Stores the beginning of the LogNode topology. 45 | private static LogNode mLogNode; 46 | 47 | /** 48 | * Returns the next LogNode in the linked list. 49 | */ 50 | public static LogNode getLogNode() { 51 | return mLogNode; 52 | } 53 | 54 | /** 55 | * Sets the LogNode data will be sent to. 56 | */ 57 | public static void setLogNode(LogNode node) { 58 | mLogNode = node; 59 | } 60 | 61 | /** 62 | * Instructs the LogNode to print the log data provided. Other LogNodes can 63 | * be chained to the end of the LogNode as desired. 64 | * 65 | * @param priority Log level of the data being logged. Verbose, Error, etc. 66 | * @param tag Tag for for the log data. Can be used to organize log statements. 67 | * @param msg The actual message to be logged. 68 | * @param tr If an exception was thrown, this can be sent along for the logging 69 | * facilities 70 | * to extract and print useful information. 71 | */ 72 | public static void println(int priority, String tag, String msg, Throwable tr) { 73 | if (mLogNode != null) { 74 | mLogNode.println(priority, tag, msg, tr); 75 | } 76 | } 77 | 78 | /** 79 | * Instructs the LogNode to print the log data provided. Other LogNodes can 80 | * be chained to the end of the LogNode as desired. 81 | * 82 | * @param priority Log level of the data being logged. Verbose, Error, etc. 83 | * @param tag Tag for for the log data. Can be used to organize log statements. 84 | * @param msg The actual message to be logged. The actual message to be logged. 85 | */ 86 | public static void println(int priority, String tag, String msg) { 87 | println(priority, tag, msg, null); 88 | } 89 | 90 | /** 91 | * Prints a message at VERBOSE priority. 92 | * 93 | * @param tag Tag for for the log data. Can be used to organize log statements. 94 | * @param msg The actual message to be logged. 95 | * @param tr If an exception was thrown, this can be sent along for the logging facilities 96 | * to extract and print useful information. 97 | */ 98 | public static void v(String tag, String msg, Throwable tr) { 99 | println(VERBOSE, tag, msg, tr); 100 | } 101 | 102 | /** 103 | * Prints a message at VERBOSE priority. 104 | * 105 | * @param tag Tag for for the log data. Can be used to organize log statements. 106 | * @param msg The actual message to be logged. 107 | */ 108 | public static void v(String tag, String msg) { 109 | v(tag, msg, null); 110 | } 111 | 112 | 113 | /** 114 | * Prints a message at DEBUG priority. 115 | * 116 | * @param tag Tag for for the log data. Can be used to organize log statements. 117 | * @param msg The actual message to be logged. 118 | * @param tr If an exception was thrown, this can be sent along for the logging facilities 119 | * to extract and print useful information. 120 | */ 121 | public static void d(String tag, String msg, Throwable tr) { 122 | println(DEBUG, tag, msg, tr); 123 | } 124 | 125 | /** 126 | * Prints a message at DEBUG priority. 127 | * 128 | * @param tag Tag for for the log data. Can be used to organize log statements. 129 | * @param msg The actual message to be logged. 130 | */ 131 | public static void d(String tag, String msg) { 132 | d(tag, msg, null); 133 | } 134 | 135 | /** 136 | * Prints a message at INFO priority. 137 | * 138 | * @param tag Tag for for the log data. Can be used to organize log statements. 139 | * @param msg The actual message to be logged. 140 | * @param tr If an exception was thrown, this can be sent along for the logging facilities 141 | * to extract and print useful information. 142 | */ 143 | public static void i(String tag, String msg, Throwable tr) { 144 | println(INFO, tag, msg, tr); 145 | } 146 | 147 | /** 148 | * Prints a message at INFO priority. 149 | * 150 | * @param tag Tag for for the log data. Can be used to organize log statements. 151 | * @param msg The actual message to be logged. 152 | */ 153 | public static void i(String tag, String msg) { 154 | i(tag, msg, null); 155 | } 156 | 157 | /** 158 | * Prints a message at WARN priority. 159 | * 160 | * @param tag Tag for for the log data. Can be used to organize log statements. 161 | * @param msg The actual message to be logged. 162 | * @param tr If an exception was thrown, this can be sent along for the logging facilities 163 | * to extract and print useful information. 164 | */ 165 | public static void w(String tag, String msg, Throwable tr) { 166 | println(WARN, tag, msg, tr); 167 | } 168 | 169 | /** 170 | * Prints a message at WARN priority. 171 | * 172 | * @param tag Tag for for the log data. Can be used to organize log statements. 173 | * @param msg The actual message to be logged. 174 | */ 175 | public static void w(String tag, String msg) { 176 | w(tag, msg, null); 177 | } 178 | 179 | /** 180 | * Prints a message at WARN priority. 181 | * 182 | * @param tag Tag for for the log data. Can be used to organize log statements. 183 | * @param tr If an exception was thrown, this can be sent along for the logging facilities 184 | * to extract and print useful information. 185 | */ 186 | public static void w(String tag, Throwable tr) { 187 | w(tag, null, tr); 188 | } 189 | 190 | /** 191 | * Prints a message at ERROR priority. 192 | * 193 | * @param tag Tag for for the log data. Can be used to organize log statements. 194 | * @param msg The actual message to be logged. 195 | * @param tr If an exception was thrown, this can be sent along for the logging facilities 196 | * to extract and print useful information. 197 | */ 198 | public static void e(String tag, String msg, Throwable tr) { 199 | println(ERROR, tag, msg, tr); 200 | } 201 | 202 | /** 203 | * Prints a message at ERROR priority. 204 | * 205 | * @param tag Tag for for the log data. Can be used to organize log statements. 206 | * @param msg The actual message to be logged. 207 | */ 208 | public static void e(String tag, String msg) { 209 | e(tag, msg, null); 210 | } 211 | 212 | /** 213 | * Prints a message at ASSERT priority. 214 | * 215 | * @param tag Tag for for the log data. Can be used to organize log statements. 216 | * @param msg The actual message to be logged. 217 | * @param tr If an exception was thrown, this can be sent along for the logging facilities 218 | * to extract and print useful information. 219 | */ 220 | public static void wtf(String tag, String msg, Throwable tr) { 221 | println(ASSERT, tag, msg, tr); 222 | } 223 | 224 | /** 225 | * Prints a message at ASSERT priority. 226 | * 227 | * @param tag Tag for for the log data. Can be used to organize log statements. 228 | * @param msg The actual message to be logged. 229 | */ 230 | public static void wtf(String tag, String msg) { 231 | wtf(tag, msg, null); 232 | } 233 | 234 | /** 235 | * Prints a message at ASSERT priority. 236 | * 237 | * @param tag Tag for for the log data. Can be used to organize log statements. 238 | * @param tr If an exception was thrown, this can be sent along for the logging facilities 239 | * to extract and print useful information. 240 | */ 241 | public static void wtf(String tag, Throwable tr) { 242 | wtf(tag, null, tr); 243 | } 244 | } 245 | -------------------------------------------------------------------------------- /DragSource/src/main/java/com/example/android/dragsource/DragSourceFragment.java: -------------------------------------------------------------------------------- 1 | /* 2 | * Copyright 2015, The Android Open Source Project 3 | * 4 | * Licensed under the Apache License, Version 2.0 (the "License"); 5 | * you may not use this file except in compliance with the License. 6 | * You may obtain a copy of the License at 7 | * 8 | * http://www.apache.org/licenses/LICENSE-2.0 9 | * 10 | * Unless required by applicable law or agreed to in writing, software 11 | * distributed under the License is distributed on an "AS IS" BASIS, 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 | * See the License for the specific language governing permissions and 14 | * limitations under the License. 15 | */ 16 | 17 | package com.example.android.dragsource; 18 | 19 | import com.example.android.common.logger.Log; 20 | 21 | import android.content.ClipData; 22 | import android.content.ClipDescription; 23 | import android.content.Context; 24 | import android.graphics.Bitmap; 25 | import android.graphics.BitmapFactory; 26 | import android.graphics.Point; 27 | import android.net.Uri; 28 | import android.os.Bundle; 29 | import android.os.PersistableBundle; 30 | import android.support.annotation.Nullable; 31 | import android.support.v13.view.DragStartHelper; 32 | import android.support.v4.app.Fragment; 33 | import android.support.v4.content.FileProvider; 34 | import android.view.DragEvent; 35 | import android.view.LayoutInflater; 36 | import android.view.View; 37 | import android.view.ViewGroup; 38 | import android.widget.ImageView; 39 | 40 | import java.io.File; 41 | import java.io.FileOutputStream; 42 | import java.io.IOException; 43 | import java.util.Date; 44 | 45 | 46 | /** 47 | * This sample demonstrates data can be moved between views within the app or between different 48 | * apps via drag and drop. 49 | *This is the source app for the drag and drop sample. This app contains several 50 | * {@link android.widget.ImageView} widgets which can be a drag source. Images can be dropped 51 | * to a drop target area within the same app or in the DropTarget app (a separate app in this 52 | * sample). 53 | *
54 | * There is also one {@link android.widget.EditText} widget that can be a drag source (no extra 55 | * setup is necessary). 56 | *
57 | * To enable cross application drag and drop, the {@link android.view.View#DRAG_FLAG_GLOBAL} 58 | * permission needs to be passed to the {@link android.view.View#startDragAndDrop(ClipData, 59 | * View.DragShadowBuilder, Object, int)} method. If a Uri 60 | * requiring permission grants is being sent, then the 61 | * {@link android.view.View#DRAG_FLAG_GLOBAL_URI_READ} and/or the 62 | * {@link android.view.View#DRAG_FLAG_GLOBAL_URI_WRITE} flags must be used also. 63 | */ 64 | public class DragSourceFragment extends Fragment { 65 | 66 | /** 67 | * Name of saved data that stores the dropped image URI on the local ImageView when set. 68 | */ 69 | private static final String IMAGE_URI = "IMAGE_URI"; 70 | 71 | /** 72 | * Name of the parameter for a {@link ClipData} extra that stores a text describing the dragged 73 | * image. 74 | */ 75 | public static final String EXTRA_IMAGE_INFO = "IMAGE_INFO"; 76 | 77 | /** 78 | * Uri of the ImageView source when set. 79 | */ 80 | private Uri mLocalImageUri; 81 | 82 | private static final String TAG = "DragSourceFragment"; 83 | 84 | private static final String CONTENT_AUTHORITY = "com.example.android.dragsource.fileprovider"; 85 | 86 | @Nullable 87 | @Override 88 | public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, 89 | @Nullable Bundle savedInstanceState) { 90 | 91 | View view = inflater.inflate(R.layout.fragment_dragsource, null); 92 | 93 | // Set up two image views for global drag and drop with a permission grant. 94 | Uri imageUri = getFileUri(R.drawable.image1, "image1.png"); 95 | ImageView imageView = (ImageView) view.findViewById(R.id.image_one); 96 | setUpDraggableImage(imageView, imageUri); 97 | imageView.setImageURI(imageUri); 98 | 99 | imageUri = getFileUri(R.drawable.image2, "image2.png"); 100 | imageView = (ImageView) view.findViewById(R.id.image_two); 101 | setUpDraggableImage(imageView, imageUri); 102 | imageView.setImageURI(imageUri); 103 | 104 | // Set up the local drop target area. 105 | final ImageView localImageTarget = (ImageView) view.findViewById(R.id.local_target); 106 | localImageTarget.setOnDragListener(new ImageDragListener() { 107 | @Override 108 | protected boolean setImageUri(View view, DragEvent event, Uri uri) { 109 | mLocalImageUri = uri; 110 | Log.d(TAG, "Setting local image to: " + uri); 111 | return super.setImageUri(view, event, uri); 112 | } 113 | }); 114 | 115 | if (savedInstanceState != null) { 116 | final String uriString = savedInstanceState.getString(IMAGE_URI); 117 | if (uriString != null) { 118 | mLocalImageUri = Uri.parse(uriString); 119 | Log.d(TAG, "Restoring local image to: " + mLocalImageUri); 120 | localImageTarget.setImageURI(mLocalImageUri); 121 | } 122 | } 123 | return view; 124 | } 125 | 126 | @Override 127 | public void onSaveInstanceState(Bundle savedInstanceState) { 128 | if (mLocalImageUri != null) { 129 | savedInstanceState.putString(IMAGE_URI, mLocalImageUri.toString()); 130 | } 131 | super.onSaveInstanceState(savedInstanceState); 132 | } 133 | 134 | private void setUpDraggableImage(ImageView imageView, final Uri imageUri) { 135 | 136 | // Set up a listener that starts the drag and drop event with flags and extra data. 137 | DragStartHelper.OnDragStartListener listener = new DragStartHelper.OnDragStartListener() { 138 | @Override 139 | public boolean onDragStart(View view, final DragStartHelper helper) { 140 | Log.d(TAG, "Drag start event received from helper."); 141 | 142 | // Use a DragShadowBuilder 143 | View.DragShadowBuilder shadowBuilder = new View.DragShadowBuilder(view) { 144 | @Override 145 | public void onProvideShadowMetrics(Point shadowSize, Point shadowTouchPoint) { 146 | super.onProvideShadowMetrics(shadowSize, shadowTouchPoint); 147 | // Notify the DragStartHelper of point where the view was touched. 148 | helper.getTouchPosition(shadowTouchPoint); 149 | Log.d(TAG, "View was touched at: " + shadowTouchPoint); 150 | } 151 | }; 152 | 153 | // Set up the flags for the drag event. 154 | // Enable drag and drop across apps (global) 155 | // and require read permissions for this URI. 156 | int flags = View.DRAG_FLAG_GLOBAL | View.DRAG_FLAG_GLOBAL_URI_READ; 157 | 158 | // Add an optional clip description that that contains an extra String that is 159 | // read out by the target app. 160 | final ClipDescription clipDescription = new ClipDescription("", new String[]{ 161 | getContext().getContentResolver().getType(imageUri)}); 162 | // Extras are stored within a PersistableBundle. 163 | PersistableBundle extras = new PersistableBundle(1); 164 | // Add a String that the target app will display. 165 | extras.putString(EXTRA_IMAGE_INFO, 166 | "Drag Started at " + new Date()); 167 | clipDescription.setExtras(extras); 168 | 169 | // The ClipData object describes the object that is being dragged and dropped. 170 | final ClipData clipData = 171 | new ClipData(clipDescription, new ClipData.Item(imageUri)); 172 | 173 | Log.d(TAG, "Created ClipDescription. Starting drag and drop."); 174 | // Start the drag and drop event. 175 | return view.startDragAndDrop(clipData, shadowBuilder, null, flags); 176 | 177 | } 178 | 179 | }; 180 | 181 | // Use the DragStartHelper to detect drag and drop events and use the OnDragStartListener 182 | // defined above to start the event when it has been detected. 183 | DragStartHelper helper = new DragStartHelper(imageView, listener); 184 | helper.attach(); 185 | Log.d(TAG, "DragStartHelper attached to view."); 186 | } 187 | 188 | /** 189 | * Copy a drawable resource into local storage and makes it available via the 190 | * {@link FileProvider}. 191 | * 192 | * @see Context#getFilesDir() 193 | * @see FileProvider 194 | * @see FileProvider#getUriForFile(Context, String, File) 195 | */ 196 | private Uri getFileUri(int sourceResourceId, String targetName) { 197 | // Create the images/ sub directory if it does not exist yet. 198 | File filePath = new File(getContext().getFilesDir(), "images"); 199 | if (!filePath.exists() && !filePath.mkdir()) { 200 | return null; 201 | } 202 | 203 | // Copy a drawable from resources to the internal directory. 204 | File newFile = new File(filePath, targetName); 205 | if (!newFile.exists()) { 206 | copyImageResourceToFile(sourceResourceId, newFile); 207 | } 208 | 209 | // Make the file accessible via the FileProvider and retrieve its URI. 210 | return FileProvider.getUriForFile(getContext(), CONTENT_AUTHORITY, newFile); 211 | } 212 | 213 | 214 | /** 215 | * Copy a PNG resource drawable to a {@File}. 216 | */ 217 | private void copyImageResourceToFile(int resourceId, File filePath) { 218 | Bitmap image = BitmapFactory.decodeResource(getResources(), resourceId); 219 | 220 | FileOutputStream out = null; 221 | try { 222 | out = new FileOutputStream(filePath); 223 | image.compress(Bitmap.CompressFormat.PNG, 100, out); 224 | } catch (Exception e) { 225 | e.printStackTrace(); 226 | } finally { 227 | try { 228 | if (out != null) { 229 | out.close(); 230 | } 231 | } catch (IOException e) { 232 | e.printStackTrace(); 233 | } 234 | } 235 | } 236 | 237 | } 238 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | Apache License 2 | -------------- 3 | 4 | Version 2.0, January 2004 5 | http://www.apache.org/licenses/ 6 | 7 | TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 8 | 9 | 1. 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