17 | * Distributed under the MIT License. 18 | */ 19 | public class ScrollableFragment extends Fragment { 20 | 21 | @Override 22 | public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { 23 | View rootView = inflater.inflate(R.layout.fragment_synchronized_scroll_view, container, false); 24 | 25 | LinearLayout rowContainer = (LinearLayout) rootView.findViewById(R.id.container); 26 | 27 | int fragmentColor = getArguments().getInt("color", 0xFFF44336); 28 | 29 | int count = 1; 30 | for (int opacity = 63; opacity < 256; opacity += 16) { 31 | 32 | TextView row = new TextView(getContext()); 33 | row.setLayoutParams(new SynchronizedScrollView.LayoutParams( 34 | ViewGroup.LayoutParams.MATCH_PARENT, 250 35 | )); 36 | row.setGravity(Gravity.CENTER); 37 | 38 | row.setBackgroundColor(fragmentColor); 39 | row.getBackground().setAlpha(opacity); 40 | row.setText(String.valueOf(count++)); 41 | 42 | rowContainer.addView(row); 43 | } 44 | 45 | return rootView; 46 | } 47 | } 48 | -------------------------------------------------------------------------------- /gradle.properties: -------------------------------------------------------------------------------- 1 | # Project-wide Gradle settings. 2 | 3 | # IDE (e.g. Android Studio) users: 4 | # Settings specified in this file will override any Gradle settings 5 | # configured through the IDE. 6 | 7 | # For more details on how to configure your build environment visit 8 | # http://www.gradle.org/docs/current/userguide/build_environment.html 9 | 10 | # Specifies the JVM arguments used for the daemon process. 11 | # The setting is particularly useful for tweaking memory settings. 12 | # Default value: -Xmx10248m -XX:MaxPermSize=256m 13 | # org.gradle.jvmargs=-Xmx2048m -XX:MaxPermSize=512m -XX:+HeapDumpOnOutOfMemoryError -Dfile.encoding=UTF-8 14 | 15 | # When configured, Gradle will run in incubating parallel mode. 16 | # This option should only be used with decoupled projects. More details, visit 17 | # http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects 18 | # org.gradle.parallel=true 19 | 20 | VERSION_NAME=1.0.1 21 | VERSION_CODE=2 22 | GROUP=it.enricocandino 23 | 24 | ANDROID_BUILD_MIN_SDK_VERSION=10 25 | ANDROID_BUILD_TARGET_SDK_VERSION=23 26 | ANDROID_BUILD_SDK_VERSION=23 27 | ANDROID_BUILD_TOOLS_VERSION=23.0.1 28 | 29 | POM_DESCRIPTION=Custom ScrollView that keeps fragments in a ViewPager synchronized at the same height 30 | POM_URL=https://github.com/enrichman/SynchronizedScrollView 31 | POM_SCM_URL=https://github.com/enrichman/SynchronizedScrollView 32 | POM_SCM_CONNECTION=scm:git@github.com:enrichman/SynchronizedScrollView.git 33 | POM_SCM_DEV_CONNECTION=scm:git@github.com:enrichman/SynchronizedScrollView.git 34 | POM_LICENCE_NAME=The MIT License (MIT) 35 | POM_LICENCE_URL=http://opensource.org/licenses/MIT 36 | POM_LICENCE_DIST=repo 37 | POM_DEVELOPER_ID=enrichman 38 | POM_DEVELOPER_NAME=Enrico Candino 39 | -------------------------------------------------------------------------------- /sample/src/main/java/it/enricocandino/ssv/sample/MainActivity.java: -------------------------------------------------------------------------------- 1 | package it.enricocandino.ssv.sample; 2 | 3 | import android.os.Bundle; 4 | import android.support.v4.app.Fragment; 5 | import android.support.v4.app.FragmentActivity; 6 | import android.support.v4.app.FragmentManager; 7 | import android.support.v4.app.FragmentPagerAdapter; 8 | import android.support.v4.content.ContextCompat; 9 | import android.support.v4.view.ViewPager; 10 | 11 | /** 12 | * Copyright (c) 2015 Enrico Candino 13 | *
14 | * Distributed under the MIT License. 15 | */ 16 | public class MainActivity extends FragmentActivity { 17 | 18 | private ViewPager mViewPager; 19 | private ScreenSlidePagerAdapter mPagerAdapter; 20 | 21 | @Override 22 | protected void onCreate(Bundle savedInstanceState) { 23 | super.onCreate(savedInstanceState); 24 | setContentView(R.layout.activity_main); 25 | 26 | mViewPager = (ViewPager) findViewById(R.id.my_view_pager); 27 | mPagerAdapter = new ScreenSlidePagerAdapter(getSupportFragmentManager()); 28 | mViewPager.setAdapter(mPagerAdapter); 29 | } 30 | 31 | 32 | private class ScreenSlidePagerAdapter extends FragmentPagerAdapter { 33 | 34 | private int[] fragmentColors = { 35 | R.color.color_1, 36 | R.color.color_2, 37 | R.color.color_3, 38 | R.color.color_4, 39 | R.color.color_5 40 | }; 41 | 42 | public ScreenSlidePagerAdapter(FragmentManager fm) { 43 | super(fm); 44 | } 45 | 46 | @Override 47 | public Fragment getItem(int position) { 48 | Fragment fragment = new ScrollableFragment(); 49 | 50 | Bundle args = new Bundle(); 51 | int color = ContextCompat.getColor(MainActivity.this, fragmentColors[position]); 52 | args.putInt("color", color); 53 | fragment.setArguments(args); 54 | 55 | return fragment; 56 | } 57 | 58 | @Override 59 | public int getCount() { 60 | return 5; 61 | } 62 | } 63 | } -------------------------------------------------------------------------------- /library/src/main/java/it/enricocandino/view/SynchronizedScrollView.java: -------------------------------------------------------------------------------- 1 | package it.enricocandino.view; 2 | 3 | import android.content.Context; 4 | import android.os.Build; 5 | import android.util.AttributeSet; 6 | import android.view.ViewTreeObserver; 7 | import android.widget.ScrollView; 8 | 9 | /** 10 | * Copyright (c) 2015 Enrico Candino 11 | *
12 | * Distributed under the MIT License.
13 | */
14 | public class SynchronizedScrollView extends ScrollView implements Synchronizer.Synchronizable {
15 |
16 | public SynchronizedScrollView(Context context) {
17 | super(context);
18 | init();
19 | }
20 |
21 | public SynchronizedScrollView(Context context, AttributeSet attrs) {
22 | super(context, attrs);
23 | init();
24 | }
25 |
26 | public SynchronizedScrollView(Context context, AttributeSet attrs, int defStyleAttr) {
27 | super(context, attrs, defStyleAttr);
28 | init();
29 | }
30 |
31 | private void init() {
32 | getViewTreeObserver().addOnGlobalLayoutListener(new SynchRegisterer());
33 | }
34 |
35 | @Override
36 | protected void onDetachedFromWindow() {
37 | super.onDetachedFromWindow();
38 |
39 | Synchronizer.getInstance().unregister(this);
40 | }
41 |
42 | @Override
43 | protected void onScrollChanged(int l, int t, int oldl, int oldt) {
44 | super.onScrollChanged(l, t, oldl, oldt);
45 |
46 | // listen for his scrolls and notify the Synchronizer
47 | Synchronizer.getInstance().update(this, getScrollY());
48 | }
49 |
50 | @Override
51 | public void onUpdate(int update) {
52 |
53 | // listen for scrolls from your siblings
54 | scrollTo(getScrollX(), update);
55 | }
56 |
57 | /*
58 | * Used to register and update the ScrollView when ready
59 | *
60 | */
61 | private class SynchRegisterer implements ViewTreeObserver.OnGlobalLayoutListener {
62 |
63 | @Override
64 | public void onGlobalLayout() {
65 | if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
66 | SynchronizedScrollView.this.getViewTreeObserver().removeOnGlobalLayoutListener(this);
67 | }else{
68 | SynchronizedScrollView.this.getViewTreeObserver().removeGlobalOnLayoutListener(this);
69 | }
70 | Synchronizer.getInstance().register(SynchronizedScrollView.this);
71 | }
72 | }
73 | }
74 |
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/gradlew.bat:
--------------------------------------------------------------------------------
1 | @if "%DEBUG%" == "" @echo off
2 | @rem ##########################################################################
3 | @rem
4 | @rem Gradle startup script for Windows
5 | @rem
6 | @rem ##########################################################################
7 |
8 | @rem Set local scope for the variables with windows NT shell
9 | if "%OS%"=="Windows_NT" setlocal
10 |
11 | @rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
12 | set DEFAULT_JVM_OPTS=
13 |
14 | set DIRNAME=%~dp0
15 | if "%DIRNAME%" == "" set DIRNAME=.
16 | set APP_BASE_NAME=%~n0
17 | set APP_HOME=%DIRNAME%
18 |
19 | @rem Find java.exe
20 | if defined JAVA_HOME goto findJavaFromJavaHome
21 |
22 | set JAVA_EXE=java.exe
23 | %JAVA_EXE% -version >NUL 2>&1
24 | if "%ERRORLEVEL%" == "0" goto init
25 |
26 | echo.
27 | echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
28 | echo.
29 | echo Please set the JAVA_HOME variable in your environment to match the
30 | echo location of your Java installation.
31 |
32 | goto fail
33 |
34 | :findJavaFromJavaHome
35 | set JAVA_HOME=%JAVA_HOME:"=%
36 | set JAVA_EXE=%JAVA_HOME%/bin/java.exe
37 |
38 | if exist "%JAVA_EXE%" goto init
39 |
40 | echo.
41 | echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
42 | echo.
43 | echo Please set the JAVA_HOME variable in your environment to match the
44 | echo location of your Java installation.
45 |
46 | goto fail
47 |
48 | :init
49 | @rem Get command-line arguments, handling Windowz variants
50 |
51 | if not "%OS%" == "Windows_NT" goto win9xME_args
52 | if "%@eval[2+2]" == "4" goto 4NT_args
53 |
54 | :win9xME_args
55 | @rem Slurp the command line arguments.
56 | set CMD_LINE_ARGS=
57 | set _SKIP=2
58 |
59 | :win9xME_args_slurp
60 | if "x%~1" == "x" goto execute
61 |
62 | set CMD_LINE_ARGS=%*
63 | goto execute
64 |
65 | :4NT_args
66 | @rem Get arguments from the 4NT Shell from JP Software
67 | set CMD_LINE_ARGS=%$
68 |
69 | :execute
70 | @rem Setup the command line
71 |
72 | set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
73 |
74 | @rem Execute Gradle
75 | "%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
76 |
77 | :end
78 | @rem End local scope for the variables with windows NT shell
79 | if "%ERRORLEVEL%"=="0" goto mainEnd
80 |
81 | :fail
82 | rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
83 | rem the _cmd.exe /c_ return code!
84 | if not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
85 | exit /b 1
86 |
87 | :mainEnd
88 | if "%OS%"=="Windows_NT" endlocal
89 |
90 | :omega
91 |
--------------------------------------------------------------------------------
/README.md:
--------------------------------------------------------------------------------
1 | # SynchronizedScrollView
2 |
3 | [](https://travis-ci.org/enrichman/SynchronizedScrollView) [](https://maven-badges.herokuapp.com/maven-central/it.enricocandino/synchronizedscrollview) [](https://android-arsenal.com/details/1/3109)
4 |
5 | Custom ScrollView that keeps fragments in a ViewPager synchronized at the same height.
6 |
7 |
8 | 
9 |
10 |
11 | Download
12 | --------
13 |
14 | Add the dependency via Gradle:
15 | ```groovy
16 | compile 'it.enricocandino:synchronizedscrollview:1.0.1'
17 | ```
18 | or Maven:
19 | ```xml
20 | 
64 |
65 |
66 | 
68 |
69 |
70 | 
72 |
73 |
74 |
75 | License
76 | --------
77 |
78 | The MIT License (MIT)
79 |
80 | Copyright (c) 2015 Enrico Candino
81 |
82 | Permission is hereby granted, free of charge, to any person obtaining a copy
83 | of this software and associated documentation files (the "Software"), to deal
84 | in the Software without restriction, including without limitation the rights
85 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
86 | copies of the Software, and to permit persons to whom the Software is
87 | furnished to do so, subject to the following conditions:
88 |
89 | The above copyright notice and this permission notice shall be included in all
90 | copies or substantial portions of the Software.
91 |
92 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
93 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
94 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
95 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
96 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
97 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
98 | SOFTWARE.
99 |
100 |
--------------------------------------------------------------------------------
/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 | # Attempt to set APP_HOME
46 | # Resolve links: $0 may be a link
47 | PRG="$0"
48 | # Need this for relative symlinks.
49 | while [ -h "$PRG" ] ; do
50 | ls=`ls -ld "$PRG"`
51 | link=`expr "$ls" : '.*-> \(.*\)$'`
52 | if expr "$link" : '/.*' > /dev/null; then
53 | PRG="$link"
54 | else
55 | PRG=`dirname "$PRG"`"/$link"
56 | fi
57 | done
58 | SAVED="`pwd`"
59 | cd "`dirname \"$PRG\"`/" >/dev/null
60 | APP_HOME="`pwd -P`"
61 | cd "$SAVED" >/dev/null
62 |
63 | CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
64 |
65 | # Determine the Java command to use to start the JVM.
66 | if [ -n "$JAVA_HOME" ] ; then
67 | if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
68 | # IBM's JDK on AIX uses strange locations for the executables
69 | JAVACMD="$JAVA_HOME/jre/sh/java"
70 | else
71 | JAVACMD="$JAVA_HOME/bin/java"
72 | fi
73 | if [ ! -x "$JAVACMD" ] ; then
74 | die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
75 |
76 | Please set the JAVA_HOME variable in your environment to match the
77 | location of your Java installation."
78 | fi
79 | else
80 | JAVACMD="java"
81 | which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
82 |
83 | Please set the JAVA_HOME variable in your environment to match the
84 | location of your Java installation."
85 | fi
86 |
87 | # Increase the maximum file descriptors if we can.
88 | if [ "$cygwin" = "false" -a "$darwin" = "false" ] ; then
89 | MAX_FD_LIMIT=`ulimit -H -n`
90 | if [ $? -eq 0 ] ; then
91 | if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
92 | MAX_FD="$MAX_FD_LIMIT"
93 | fi
94 | ulimit -n $MAX_FD
95 | if [ $? -ne 0 ] ; then
96 | warn "Could not set maximum file descriptor limit: $MAX_FD"
97 | fi
98 | else
99 | warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
100 | fi
101 | fi
102 |
103 | # For Darwin, add options to specify how the application appears in the dock
104 | if $darwin; then
105 | GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
106 | fi
107 |
108 | # For Cygwin, switch paths to Windows format before running java
109 | if $cygwin ; then
110 | APP_HOME=`cygpath --path --mixed "$APP_HOME"`
111 | CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
112 | JAVACMD=`cygpath --unix "$JAVACMD"`
113 |
114 | # We build the pattern for arguments to be converted via cygpath
115 | ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
116 | SEP=""
117 | for dir in $ROOTDIRSRAW ; do
118 | ROOTDIRS="$ROOTDIRS$SEP$dir"
119 | SEP="|"
120 | done
121 | OURCYGPATTERN="(^($ROOTDIRS))"
122 | # Add a user-defined pattern to the cygpath arguments
123 | if [ "$GRADLE_CYGPATTERN" != "" ] ; then
124 | OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
125 | fi
126 | # Now convert the arguments - kludge to limit ourselves to /bin/sh
127 | i=0
128 | for arg in "$@" ; do
129 | CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
130 | CHECK2=`echo "$arg"|egrep -c "^-"` ### Determine if an option
131 |
132 | if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then ### Added a condition
133 | eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
134 | else
135 | eval `echo args$i`="\"$arg\""
136 | fi
137 | i=$((i+1))
138 | done
139 | case $i in
140 | (0) set -- ;;
141 | (1) set -- "$args0" ;;
142 | (2) set -- "$args0" "$args1" ;;
143 | (3) set -- "$args0" "$args1" "$args2" ;;
144 | (4) set -- "$args0" "$args1" "$args2" "$args3" ;;
145 | (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
146 | (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
147 | (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
148 | (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
149 | (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
150 | esac
151 | fi
152 |
153 | # Split up the JVM_OPTS And GRADLE_OPTS values into an array, following the shell quoting and substitution rules
154 | function splitJvmOpts() {
155 | JVM_OPTS=("$@")
156 | }
157 | eval splitJvmOpts $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS
158 | JVM_OPTS[${#JVM_OPTS[*]}]="-Dorg.gradle.appname=$APP_BASE_NAME"
159 |
160 | exec "$JAVACMD" "${JVM_OPTS[@]}" -classpath "$CLASSPATH" org.gradle.wrapper.GradleWrapperMain "$@"
161 |
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