├── assets
    └── xposed_init
├── ic_launcher-web.png
├── res
    ├── values
    │   ├── strings.xml
    │   └── styles.xml
    ├── drawable-hdpi
    │   └── ic_launcher.png
    ├── drawable-mdpi
    │   └── ic_launcher.png
    ├── drawable-xhdpi
    │   └── ic_launcher.png
    └── drawable-xxhdpi
    │   └── ic_launcher.png
├── libs
    └── android-support-v4.jar
├── .classpath
├── project.properties
├── proguard-project.txt
├── AndroidManifest.xml
├── .project
└── src
    └── com
        └── mohammadag
            └── statusbarscrolltotop
                └── XposedMod.java


/assets/xposed_init:
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1 | com.mohammadag.statusbarscrolltotop.XposedMod


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/ic_launcher-web.png:
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https://raw.githubusercontent.com/MohammadAG/Xposed-StatusBar-Scroll-To-Top/HEAD/ic_launcher-web.png


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/res/values/strings.xml:
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1 | <resources>
2 |     <string name="app_name">Statusbar Scroll to Top</string>
3 | </resources>
4 | 


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/res/values/styles.xml:
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1 | <resources>
2 |     <style name="AppBaseTheme" parent="android:Theme.Light" />
3 | </resources>
4 | 


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/libs/android-support-v4.jar:
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https://raw.githubusercontent.com/MohammadAG/Xposed-StatusBar-Scroll-To-Top/HEAD/libs/android-support-v4.jar


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/res/drawable-hdpi/ic_launcher.png:
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https://raw.githubusercontent.com/MohammadAG/Xposed-StatusBar-Scroll-To-Top/HEAD/res/drawable-hdpi/ic_launcher.png


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/res/drawable-mdpi/ic_launcher.png:
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https://raw.githubusercontent.com/MohammadAG/Xposed-StatusBar-Scroll-To-Top/HEAD/res/drawable-mdpi/ic_launcher.png


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/res/drawable-xhdpi/ic_launcher.png:
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https://raw.githubusercontent.com/MohammadAG/Xposed-StatusBar-Scroll-To-Top/HEAD/res/drawable-xhdpi/ic_launcher.png


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/res/drawable-xxhdpi/ic_launcher.png:
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https://raw.githubusercontent.com/MohammadAG/Xposed-StatusBar-Scroll-To-Top/HEAD/res/drawable-xxhdpi/ic_launcher.png


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/.classpath:
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 1 | <?xml version="1.0" encoding="UTF-8"?>
 2 | <classpath>
 3 | 	<classpathentry kind="src" path="src"/>
 4 | 	<classpathentry kind="src" path="gen"/>
 5 | 	<classpathentry kind="con" path="com.android.ide.eclipse.adt.ANDROID_FRAMEWORK"/>
 6 | 	<classpathentry exported="true" kind="con" path="com.android.ide.eclipse.adt.LIBRARIES"/>
 7 | 	<classpathentry exported="true" kind="con" path="com.android.ide.eclipse.adt.DEPENDENCIES"/>
 8 | 	<classpathentry kind="lib" path="/home/mohammad/android-libs/XposedBridgeApi-42.jar"/>
 9 | 	<classpathentry kind="output" path="bin/classes"/>
10 | </classpath>
11 | 


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/project.properties:
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 1 | # This file is automatically generated by Android Tools.
 2 | # Do not modify this file -- YOUR CHANGES WILL BE ERASED!
 3 | #
 4 | # This file must be checked in Version Control Systems.
 5 | #
 6 | # To customize properties used by the Ant build system edit
 7 | # "ant.properties", and override values to adapt the script to your
 8 | # project structure.
 9 | #
10 | # To enable ProGuard to shrink and obfuscate your code, uncomment this (available properties: sdk.dir, user.home):
11 | #proguard.config=${sdk.dir}/tools/proguard/proguard-android.txt:proguard-project.txt
12 | 
13 | # Project target.
14 | target=android-19
15 | 


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/proguard-project.txt:
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 1 | # To enable ProGuard in your project, edit project.properties
 2 | # to define the proguard.config property as described in that file.
 3 | #
 4 | # Add project specific ProGuard rules here.
 5 | # By default, the flags in this file are appended to flags specified
 6 | # in ${sdk.dir}/tools/proguard/proguard-android.txt
 7 | # You can edit the include path and order by changing the ProGuard
 8 | # include property in project.properties.
 9 | #
10 | # For more details, see
11 | #   http://developer.android.com/guide/developing/tools/proguard.html
12 | 
13 | # Add any project specific keep options here:
14 | 
15 | # If your project uses WebView with JS, uncomment the following
16 | # and specify the fully qualified class name to the JavaScript interface
17 | # class:
18 | #-keepclassmembers class fqcn.of.javascript.interface.for.webview {
19 | #   public *;
20 | #}
21 | 


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/AndroidManifest.xml:
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 1 | <manifest xmlns:android="http://schemas.android.com/apk/res/android"
 2 |     package="com.mohammadag.statusbarscrolltotop"
 3 |     android:versionCode="2"
 4 |     android:versionName="1.1" >
 5 | 
 6 |     <uses-sdk
 7 |         android:minSdkVersion="15"
 8 |         android:targetSdkVersion="19" />
 9 | 
10 |     <application
11 |         android:allowBackup="true"
12 |         android:icon="@drawable/ic_launcher"
13 |         android:label="@string/app_name"
14 |         android:theme="@style/AppBaseTheme" >
15 |         <meta-data
16 |             android:name="xposedmodule"
17 |             android:value="true" />
18 |         <meta-data
19 |             android:name="xposedminversion"
20 |             android:value="30+" />
21 |         <meta-data
22 |             android:name="xposeddescription"
23 |             android:value="Tap status bar to scroll most scrollers to top" />
24 |     </application>
25 | 
26 | </manifest>


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/.project:
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 1 | <?xml version="1.0" encoding="UTF-8"?>
 2 | <projectDescription>
 3 | 	<name>StatusbarScrollToTop</name>
 4 | 	<comment></comment>
 5 | 	<projects>
 6 | 	</projects>
 7 | 	<buildSpec>
 8 | 		<buildCommand>
 9 | 			<name>com.android.ide.eclipse.adt.ResourceManagerBuilder</name>
10 | 			<arguments>
11 | 			</arguments>
12 | 		</buildCommand>
13 | 		<buildCommand>
14 | 			<name>com.android.ide.eclipse.adt.PreCompilerBuilder</name>
15 | 			<arguments>
16 | 			</arguments>
17 | 		</buildCommand>
18 | 		<buildCommand>
19 | 			<name>org.eclipse.jdt.core.javabuilder</name>
20 | 			<arguments>
21 | 			</arguments>
22 | 		</buildCommand>
23 | 		<buildCommand>
24 | 			<name>com.android.ide.eclipse.adt.ApkBuilder</name>
25 | 			<arguments>
26 | 			</arguments>
27 | 		</buildCommand>
28 | 	</buildSpec>
29 | 	<natures>
30 | 		<nature>com.android.ide.eclipse.adt.AndroidNature</nature>
31 | 		<nature>org.eclipse.jdt.core.javanature</nature>
32 | 	</natures>
33 | </projectDescription>
34 | 


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/src/com/mohammadag/statusbarscrolltotop/XposedMod.java:
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  1 | package com.mohammadag.statusbarscrolltotop;
  2 | 
  3 | import static de.robv.android.xposed.XposedHelpers.findAndHookMethod;
  4 | import static de.robv.android.xposed.XposedHelpers.findClass;
  5 | 
  6 | import java.util.ArrayList;
  7 | 
  8 | import android.app.Activity;
  9 | import android.content.BroadcastReceiver;
 10 | import android.content.Context;
 11 | import android.content.Intent;
 12 | import android.content.IntentFilter;
 13 | import android.graphics.Rect;
 14 | import android.view.MotionEvent;
 15 | import android.view.View;
 16 | import android.widget.AbsListView;
 17 | import android.widget.ScrollView;
 18 | import de.robv.android.xposed.IXposedHookLoadPackage;
 19 | import de.robv.android.xposed.IXposedHookZygoteInit;
 20 | import de.robv.android.xposed.XC_MethodHook;
 21 | import de.robv.android.xposed.XposedBridge;
 22 | import de.robv.android.xposed.XposedHelpers;
 23 | import de.robv.android.xposed.callbacks.XC_LoadPackage.LoadPackageParam;
 24 | 
 25 | public class XposedMod implements IXposedHookLoadPackage, IXposedHookZygoteInit {
 26 | 	/* My name's here so we don't conflict with other fields, deal with it :p */
 27 | 	private static final String KEY_RECEIVERS = "mMohammadAG_scrolToTopReceivers";
 28 | 
 29 | 	/* You can trigger this with any app that can fire intents! */
 30 | 	private static final String INTENT_SCROLL_TO_TOP = "com.mohammadag.statusbarscrolltotop.SCROLL_TO_TOP";
 31 | 
 32 | 	/* We get a MotionEvent when the status bar is tapped, we need to know if it's a click or a drag */
 33 | 	private float mDownX;
 34 | 	private float mDownY;
 35 | 	private final float SCROLL_THRESHOLD = 10;
 36 | 	private boolean mIsClick;
 37 | 
 38 | 	/* Some sort of crappy IPC */
 39 | 	class ScrollViewReceiver extends BroadcastReceiver {
 40 | 		private ScrollView mScrollView;
 41 | 		public ScrollViewReceiver(ScrollView view) {
 42 | 			mScrollView = view;
 43 | 		}
 44 | 
 45 | 		@Override
 46 | 		public void onReceive(Context context, Intent intent) {
 47 | 			if (isViewInViewBounds(getContentViewFromContext(mScrollView.getContext()), mScrollView))
 48 | 				mScrollView.smoothScrollTo(0, 0);
 49 | 		}
 50 | 	};
 51 | 
 52 | 	class AbsListViewReceiver extends BroadcastReceiver {
 53 | 		private AbsListView mListView;
 54 | 		public AbsListViewReceiver(AbsListView view) {
 55 | 			mListView = view;
 56 | 		}
 57 | 
 58 | 		@Override
 59 | 		public void onReceive(Context context, Intent intent) {
 60 | 			if (isViewInViewBounds(getContentViewFromContext(mListView.getContext()), mListView))
 61 | 				mListView.smoothScrollToPosition(0);
 62 | 		}
 63 | 	}
 64 | 
 65 | 	@Override
 66 | 	public void initZygote(StartupParam startupParam) throws Throwable {
 67 | 		/* AbsListView, it's one instance of a scroller */
 68 | 		findAndHookMethod(AbsListView.class, "initAbsListView", new XC_MethodHook() {
 69 | 			@Override
 70 | 			protected void afterHookedMethod(MethodHookParam param) throws Throwable {
 71 | 				AbsListView view = (AbsListView) param.thisObject;
 72 | 				if (!(view.getContext() instanceof Activity))
 73 | 					return;
 74 | 				Activity activity = (Activity) view.getContext();		
 75 | 				AbsListViewReceiver receiver = new AbsListViewReceiver(view);
 76 | 				addReceiverToActivity(activity, receiver);
 77 | 				activity.registerReceiver(receiver, new IntentFilter(INTENT_SCROLL_TO_TOP));
 78 | 			}
 79 | 		});
 80 | 
 81 | 		/* Another one */
 82 | 		findAndHookMethod(ScrollView.class, "initScrollView", new XC_MethodHook() {
 83 | 			@Override
 84 | 			protected void afterHookedMethod(MethodHookParam param) throws Throwable {
 85 | 				ScrollView view = (ScrollView) param.thisObject;
 86 | 				if (!(view.getContext() instanceof Activity))
 87 | 					return;
 88 | 				Activity activity = (Activity) view.getContext();		
 89 | 				ScrollViewReceiver receiver = new ScrollViewReceiver(view);
 90 | 				addReceiverToActivity(activity, receiver);
 91 | 				activity.registerReceiver(receiver, new IntentFilter(INTENT_SCROLL_TO_TOP));
 92 | 			}
 93 | 		});
 94 | 
 95 | 		/* FYI, there are some manufacturer specific ones, like Samsung's TouchWiz ones.
 96 | 		 * I'll look into those later on...
 97 | 		 */
 98 | 
 99 | 		/* We need to register and unregister receivers in onPause and onResume 
100 | 		 * otherwise, Android bitches about it (for good (memory) reason(s) probably). We do that
101 | 		 * by keeping an ArrayList of BroadcastReceivers in all activities. There might be a better
102 | 		 * way...
103 | 		 */
104 | 		Class<?> ActivityClass = findClass("android.app.Activity", null);
105 | 		findAndHookMethod(ActivityClass, "onResume", new XC_MethodHook() {
106 | 			@Override
107 | 			protected void afterHookedMethod(MethodHookParam param) throws Throwable {
108 | 				Activity activity = (Activity) param.thisObject;
109 | 				resumeBroadcastReceivers(activity);
110 | 			}
111 | 		});
112 | 
113 | 		findAndHookMethod(ActivityClass, "onPause", new XC_MethodHook() {
114 | 			@Override
115 | 			protected void beforeHookedMethod(MethodHookParam param) throws Throwable {
116 | 				Activity activity = (Activity) param.thisObject;
117 | 				pauseBroadcastReceivers(activity);
118 | 			}
119 | 		});
120 | 	}
121 | 
122 | 	@Override
123 | 	public void handleLoadPackage(LoadPackageParam lpparam) throws Throwable {
124 | 		if (!lpparam.packageName.equals("com.android.systemui"))
125 | 			return;
126 | 
127 | 		Class<?> StatusBarWindowView = findClass("com.android.systemui.statusbar.phone.StatusBarWindowView",
128 | 				lpparam.classLoader);
129 | 
130 | 		findAndHookMethod(StatusBarWindowView, "onInterceptTouchEvent", MotionEvent.class, new XC_MethodHook() {
131 | 			@Override
132 | 			protected void afterHookedMethod(MethodHookParam param) throws Throwable {
133 | 				MotionEvent ev = (MotionEvent) param.args[0];
134 | 				View view = (View) param.thisObject;
135 | 				switch (ev.getAction() & MotionEvent.ACTION_MASK) {
136 | 				case MotionEvent.ACTION_DOWN:
137 | 					mDownX = ev.getX();
138 | 					mDownY = ev.getY();
139 | 					mIsClick = true;
140 | 					break;
141 | 				case MotionEvent.ACTION_CANCEL:
142 | 				case MotionEvent.ACTION_UP:
143 | 					if (mIsClick) {
144 | 						try {
145 | 							/* Get NotificationPanelView instance, it subclasses PanelView */
146 | 							Object notificationPanelView =
147 | 									XposedHelpers.getObjectField(param.thisObject, "mNotificationPanel");
148 | 
149 | 							float expandedFraction = (Float) XposedHelpers.callMethod(notificationPanelView,
150 | 									"getExpandedFraction");
151 | 
152 | 							if (expandedFraction < 0.1)
153 | 								view.getContext().sendBroadcast(new Intent(INTENT_SCROLL_TO_TOP));
154 | 						} catch (Throwable t) {
155 | 							XposedBridge.log("StatusBarScrollToTop: Unable to determine expanded fraction: " + t.getMessage());
156 | 							t.printStackTrace();
157 | 							view.getContext().sendBroadcast(new Intent(INTENT_SCROLL_TO_TOP));
158 | 						}
159 | 					}
160 | 					break;
161 | 				case MotionEvent.ACTION_MOVE:
162 | 					if (mIsClick && (Math.abs(mDownX - ev.getX()) > SCROLL_THRESHOLD || Math.abs(mDownY - ev.getY()) > SCROLL_THRESHOLD)) {
163 | 						mIsClick = false;
164 | 					}
165 | 					break;
166 | 				default:
167 | 					break;
168 | 				}
169 | 			}
170 | 		});
171 | 	}
172 | 
173 | 	/* Helpers so the code looks less like shit */
174 | 	private static void addReceiverToActivity(Activity activity, BroadcastReceiver receiver) {
175 | 		ArrayList<BroadcastReceiver> receivers = getReceiversForActivity(activity);
176 | 		receivers.add(receiver);
177 | 		XposedHelpers.setAdditionalInstanceField(activity, KEY_RECEIVERS, receivers);
178 | 	}
179 | 
180 | 	@SuppressWarnings("unchecked")
181 | 	private static ArrayList<BroadcastReceiver> getReceiversForActivity(Activity activity) {
182 | 		ArrayList<BroadcastReceiver> receivers = null;
183 | 		try {
184 | 			receivers = (ArrayList<BroadcastReceiver>) XposedHelpers.getAdditionalInstanceField(activity,
185 | 					KEY_RECEIVERS);
186 | 		} catch (Throwable t) {
187 | 			t.printStackTrace();
188 | 		}
189 | 
190 | 		if (receivers == null) {
191 | 			receivers = new ArrayList<BroadcastReceiver>();
192 | 		}
193 | 
194 | 		return receivers;
195 | 	}
196 | 
197 | 	private static void resumeBroadcastReceivers(Activity activity) {
198 | 		ArrayList<BroadcastReceiver> receivers = getReceiversForActivity(activity);
199 | 		for (BroadcastReceiver receiver : receivers) {
200 | 			activity.registerReceiver(receiver, new IntentFilter(INTENT_SCROLL_TO_TOP));
201 | 		}
202 | 	}
203 | 
204 | 	private static void pauseBroadcastReceivers(Activity activity) {
205 | 		ArrayList<BroadcastReceiver> receivers = getReceiversForActivity(activity);
206 | 		for (BroadcastReceiver receiver : receivers) {
207 | 			activity.unregisterReceiver(receiver);
208 | 		}
209 | 	}
210 | 
211 | 	/* Check if the View is visible to the user, i.e on screen.
212 | 	 * We do this since in tabbed interfaces, we can cause a scrollbar that's off screen
213 | 	 * to go to the top as well as the visible one.
214 | 	 */
215 | 	private static boolean isViewInViewBounds(View mainView, View view) {
216 | 		/* Failsafe */
217 | 		if (mainView == null)
218 | 			return true;
219 | 
220 | 		Rect bounds = new Rect();
221 | 		mainView.getHitRect(bounds);
222 | 		return view.getLocalVisibleRect(bounds);
223 | 	}
224 | 
225 | 	/* This works because Context is actually Activity downcasted */
226 | 	private static View getContentViewFromContext(Context context) {
227 | 		if (!(context instanceof Activity))
228 | 			return null;
229 | 
230 | 		return ((Activity) context).findViewById(android.R.id.content);
231 | 	}
232 | 
233 | 	/* And that's a wrap */
234 | }
235 | 


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