RK:系统手势监听

一. 

1.1.需求：从屏幕的左上角为起点,双指触控滑动至屏幕正中央,启动Launcher

 1.2.GestureDetector

package com.gatsby.mygesturelistener;

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.GestureDetector;
import android.view.MotionEvent;

public class MainActivity extends Activity {

	private MyGestureListener mgListener;
	private GestureDetector mDetector;
	private final static String TAG = "gatsby";

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);

		setContentView(R.layout.activity_main);

		mgListener = new MyGestureListener();
		mDetector = new GestureDetector(this, mgListener);
	}

	@Override
	public boolean onTouchEvent(MotionEvent event) {
		return mDetector.onTouchEvent(event);
	}

	// 实现GestureListener接口
	private class MyGestureListener implements GestureDetector.OnGestureListener {

		@Override
		public boolean onDown(MotionEvent motionEvent) {
			Log.d(TAG, "onDown");
			return false;
		}

		@Override
		public void onShowPress(MotionEvent motionEvent) {
			// Log.d(TAG, "onShowPress:手指按下一段时间,不过还没到长按");
			Log.d(TAG, "onShowPress");
		}

		@Override
		public boolean onSingleTapUp(MotionEvent motionEvent) {
			// Log.d(TAG, "onSingleTapUp:手指离开屏幕的一瞬间");
			Log.d(TAG, "onSingleTapUp");
			return false;
		}

		@Override
		public boolean onScroll(MotionEvent motionEvent, MotionEvent motionEvent1, float v, float v1) {
			// Log.d(TAG, "onScroll:在触摸屏上滑动");
			Log.d(TAG, "onScroll");
			return false;
		}

		@Override
		public void onLongPress(MotionEvent motionEvent) {
			// Log.d(TAG, "onLongPress:长按并且没有松开");
			Log.d(TAG, "onLongPress");
		}

		@Override
		public boolean onFling(MotionEvent motionEvent, MotionEvent motionEvent1, float v, float v1) {
			// Log.d(TAG, "onFling:迅速滑动，并松开");
			Log.d(TAG, "onFling");
			Log.d(TAG, "motionEvent->" + motionEvent.getX() + " motionEvent1->" + motionEvent1.getX());
			// 从左往右 滑动<50
			if (motionEvent.getX() - motionEvent1.getX() < 50) {

			}
			return false;

		}
	}

}

2.1.MotionEvent、GestureDetector、OnGestureListener
首先，在Android系统中，每一次手势交互都会依照以下顺序执行。
a. 接触接触屏一刹那，触发一个MotionEvent事件。
b. 该事件被OnTouchListener监听，在其onTouch()方法里获得该MotionEvent对象。、
c. 通过GestureDetector（手势识别器）转发次MotionEvent对象至OnGestureListener。·
d. OnGestureListener获得该对象，听根据该对象封装的的信息，做出合适的反馈

MotionEvent: 这个类用于封装手势、触摸笔、轨迹球等等的动作事件。其内部封装了两个重要的属性X和Y，这两个属性分别用于记录横轴和纵轴的坐标。
GestureDetector: 识别各种手势。
OnGestureListener: 这是一个手势交互的监听接口，其中提供了多个抽象方法，并根据GestureDetector的手势识别结果调用相对应的方法。

二.系统监听触摸事件
主要就是在SystemGesturesPointerEventListener中加了一个回调方法onMorePointerSwipe，当getPointerCount==2的时候调用，然后在PhoneWindowManager中实现onMorePointerSwipe．

底部、右边滑动，接鼠标时从顶部、底部按住滑动，我们在 Callbacks 中增加一个 void onMorePointerSwipe();
用来回调三指同时滑动的情况，通过 event.getPointerCount() 获取当前屏幕手指按下个数，也可打开调试模式里的指针和触点显示

diff --git a/frameworks/base/services/core/java/com/android/server/policy/PhoneWindowManager.java b/frameworks/base/services/core/java/com/android/server/policy/PhoneWindowManager.java
index ce46afc0..105d27c 100755
--- a/frameworks/base/services/core/java/com/android/server/policy/PhoneWindowManager.java
+++ b/frameworks/base/services/core/java/com/android/server/policy/PhoneWindowManager.java
@@ -1926,6 +1926,14 @@ public class PhoneWindowManager implements WindowManagerPolicy {
                         }
                     }
                     @Override
+                    public void onMorePointerSwipe() {
+                        if (mNavigationBar != null) {
+							Log.d("gatsby","1111111111111111 onMorePointerSwipe");
+                            
+                        }
+                    }					
+					
+                    @Override
                     public void onFling(int duration) {
                         if (mPowerManagerInternal != null) {
                             mPowerManagerInternal.powerHint(
@@ -2002,6 +2010,9 @@ public class PhoneWindowManager implements WindowManagerPolicy {
         mWindowManagerInternal.registerAppTransitionListener(
                 mStatusBarController.getAppTransitionListener());
     }
+	
+	
+
 
     /**
      * Read values from config.xml that may be overridden depending on
diff --git a/frameworks/base/services/core/java/com/android/server/policy/SystemGesturesPointerEventListener.java b/frameworks/base/services/core/java/com/android/server/policy/SystemGesturesPointerEventListener.java
old mode 100644
new mode 100755
index 598c58e..da3b8d9
--- a/frameworks/base/services/core/java/com/android/server/policy/SystemGesturesPointerEventListener.java
+++ b/frameworks/base/services/core/java/com/android/server/policy/SystemGesturesPointerEventListener.java
@@ -33,7 +33,7 @@ import android.widget.OverScroller;
  */
 public class SystemGesturesPointerEventListener implements PointerEventListener {
     private static final String TAG = "SystemGestures";
-    private static final boolean DEBUG = false;
+    private static final boolean DEBUG = true;
     private static final long SWIPE_TIMEOUT_MS = 500;
     private static final int MAX_TRACKED_POINTERS = 32;  // max per input system
     private static final int UNTRACKED_POINTER = -1;
@@ -44,6 +44,7 @@ public class SystemGesturesPointerEventListener implements PointerEventListener
     private static final int SWIPE_FROM_BOTTOM = 2;
     private static final int SWIPE_FROM_RIGHT = 3;
     private static final int SWIPE_FROM_LEFT = 4;
+	private static boolean  XhDown = false;
 
     private final Context mContext;
     private final int mSwipeStartThreshold;
@@ -64,6 +65,7 @@ public class SystemGesturesPointerEventListener implements PointerEventListener
     private boolean mDebugFireable;
     private boolean mMouseHoveringAtEdge;
     private long mLastFlingTime;
+	
 
     public SystemGesturesPointerEventListener(Context context, Callbacks callbacks) {
         mContext = context;
@@ -104,6 +106,14 @@ public class SystemGesturesPointerEventListener implements PointerEventListener
                     mCallbacks.onMouseLeaveFromEdge();
                 }
                 mCallbacks.onDown();
+				//Log.d("gatsby", "XXXgetRawX->" + event.getRawX() + "YYYgetRawY->" + event.getRawY());
+				//if (DEBUG) Slog.d("gatsby", "XXXgetRawX->" + event.getRawX() + "YYYgetRawY->" + event.getRawY());
+				float xhgetX = event.getRawX();
+				if (xhgetX < 200.01){
+					if (DEBUG) Slog.d("gatsby", "ZZZZZZZZZZZZZZZZZZZZZZ " );
+					XhDown = true;
+				}
+				
                 break;
             case MotionEvent.ACTION_POINTER_DOWN:
                 captureDown(event, event.getActionIndex());
@@ -131,7 +141,15 @@ public class SystemGesturesPointerEventListener implements PointerEventListener
                     } else if (swipe == SWIPE_FROM_LEFT) {
                         if (DEBUG) Slog.d(TAG, "Firing onSwipeFromLeft");
                         mCallbacks.onSwipeFromLeft();
-                    }
+                    } 
+					if (DEBUG) Slog.d("gatsby", "qqqqqqqqqqqqqqqqqqqqqqq "+XhDown );
+					
+										
+					if (DEBUG) Slog.d(TAG, "GGGGGXXXgetRawX->" + event.getRawX() + "GGGGYYYgetRawY->" + event.getRawY());
+					if (XhDown && event.getPointerCount() == 2){
+						 if (DEBUG) Slog.d("gatsby", "BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB "+XhDown );
+						mCallbacks.onMorePointerSwipe();
+					}
                 }
                 break;
             case MotionEvent.ACTION_HOVER_MOVE:
@@ -150,6 +168,11 @@ public class SystemGesturesPointerEventListener implements PointerEventListener
                 }
                 break;
             case MotionEvent.ACTION_UP:
+
+	
+					XhDown = false;
+				    if (DEBUG) Slog.d("gatsby", "ZZZZZZZZZZZZZZZZZZZZZZ "+XhDown );
+				
             case MotionEvent.ACTION_CANCEL:
                 mSwipeFireable = false;
                 mDebugFireable = false;
@@ -282,5 +305,6 @@ public class SystemGesturesPointerEventListener implements PointerEventListener
         void onMouseHoverAtBottom();
         void onMouseLeaveFromEdge();
         void onDebug();
+		void onMorePointerSwipe();
     }
 }

 二.Android7.1 左上两下 ,右一下 进allapp

2.1.自定义手势

--- a/frameworks/base/services/core/java/com/android/server/policy/SystemGesturesPointerEventListener.java
+++ b/frameworks/base/services/core/java/com/android/server/policy/SystemGesturesPointerEventListener.java
@@ -59,6 +59,7 @@ public class SystemGesturesPointerEventListener implements PointerEventListener
 
     int screenHeight;
     int screenWidth;
+    private int count_point;
     private int mDownPointers;
     private boolean mSwipeFireable;
     private boolean mDebugFireable;
@@ -72,7 +73,7 @@ public class SystemGesturesPointerEventListener implements PointerEventListener
                 .getDimensionPixelSize(com.android.internal.R.dimen.status_bar_height);
         mSwipeDistanceThreshold = mSwipeStartThreshold;
         if (DEBUG) Slog.d(TAG,  "mSwipeStartThreshold=" + mSwipeStartThreshold
-                + " mSwipeDistanceThreshold=" + mSwipeDistanceThreshold);
+                + " mSwipeDistanceThreshold=" + mSwipeDistanceThreshold);                               
     }
 
     private static <T> T checkNull(String name, T arg) {
@@ -86,6 +87,8 @@ public class SystemGesturesPointerEventListener implements PointerEventListener
         Handler h = new Handler(Looper.myLooper());
         mGestureDetector = new GestureDetector(mContext, new FlingGestureDetector(), h);
         mOverscroller = new OverScroller(mContext);
+        
+        Slog.d(TAG,"222 screenHeight = "+screenHeight+"  screenWidth = "+screenWidth);
     }
 
     @Override
@@ -102,8 +105,26 @@ public class SystemGesturesPointerEventListener implements PointerEventListener
                 if (mMouseHoveringAtEdge) {
                     mMouseHoveringAtEdge = false;
                     mCallbacks.onMouseLeaveFromEdge();
-                }
+                }                
                 mCallbacks.onDown();
+                float xhgetX = event.getRawX();
+                float xhgetY = event.getRawY();     
+                Slog.d(TAG,"333 xhgetX = "+xhgetX+"  xhgetY = "+xhgetY);         
+								if (xhgetX <= 100.00 && xhgetY <= 100.00 ){
+									if(count_point<2)
+										count_point ++;
+								}else if( (xhgetX <= (screenWidth/2 + 50) && xhgetX >= (screenWidth/2 - 50) && xhgetY <= (screenHeight/2 + 50) && xhgetY >= (screenHeight/2 - 50))
+								|| (xhgetX >= (screenWidth -100 )  && xhgetY >= (screenHeight - 100)) ){
+										if(count_point==2)
+											count_point ++;
+								}else{
+									  count_point = 0;
+								} 
+								if(count_point == 3){	
+									count_point=0;								
+									mCallbacks.onBootAllApps();									
+								}
+								Slog.d(TAG,"333 count_point = "+count_point);     
                 break;
             case MotionEvent.ACTION_POINTER_DOWN:
                 captureDown(event, event.getActionIndex());
@@ -282,5 +303,6 @@ public class SystemGesturesPointerEventListener implements PointerEventListener
         void onMouseHoverAtBottom();
         void onMouseLeaveFromEdge();
         void onDebug();
+        void onBootAllApps();
     }
 }

2.2.注册系统全局广播

--- a/frameworks/base/core/res/AndroidManifest.xml
+++ b/frameworks/base/core/res/AndroidManifest.xml
@@ -509,6 +509,8 @@
     <protected-broadcast android:name="android.intent.action.HDMI_PLUG" />
     <protected-broadcast android:name="android.intent.action.USB_CAMERA" />
     
+    <protected-broadcast android:name="com.xinhua.bootAllApps" />
+    
     
     <!--for cec-->
     <protected-broadcast android:name="com.rockchip.hdmicec.power_status_changed" />

2.3.这里回调

--- a/frameworks/base/services/core/java/com/android/server/policy/PhoneWindowManager.java
+++ b/frameworks/base/services/core/java/com/android/server/policy/PhoneWindowManager.java
@@ -1963,6 +1963,14 @@ public class PhoneWindowManager implements WindowManagerPolicy {
                     public void onMouseLeaveFromEdge() {
                         mHandler.removeMessages(MSG_REQUEST_TRANSIENT_BARS);
                     }
+                    
+                    @Override
+                    public void onBootAllApps() {
+                       //
+                       Slog.d("SystemGestures","onBootAllApps");
+                       Intent i = new Intent("com.xinhua.bootAllApps");
+                       mContext.sendBroadcastAsUser(i,UserHandle.CURRENT);
+                    }
                 });
         mImmersiveModeConfirmation = new ImmersiveModeConfirmation(mContext);
         mWindowManagerFuncs.registerPointerEventListener(mSystemGestures);　　

2.4.接收广播

--- a/packages/apps/Launcher3/src/com/android/launcher3/Launcher.java
+++ b/packages/apps/Launcher3/src/com/android/launcher3/Launcher.java
@@ -223,6 +223,23 @@ public class Launcher extends Activity
         }
     };
 
+    private final BroadcastReceiver allAppReceiver = new BroadcastReceiver() {
+
+        @Override
+        public void onReceive(Context context, Intent intent) {
+            if ("com.xinhua.bootAllApps".equals(intent.getAction())) {             
+                if (!isAppsViewVisible()) {
+           					getUserEventDispatcher().logActionOnControl(LauncherLogProto.Action.TAP,
+                    				LauncherLogProto.ALL_APPS_BUTTON);
+            				showAppsView(true /* animated */, true /* updatePredictedApps */,
+                    				false /* focusSearchBar */);
+        				}
+            }
+        }
+    };
+
     @Thunk Workspace mWorkspace;
     private View mLauncherView;
     @Thunk DragLayer mDragLayer;
@@ -456,6 +473,10 @@ public class Launcher extends Activity
 
         IntentFilter filter = new IntentFilter(ACTION_APPWIDGET_HOST_RESET);
         registerReceiver(mUiBroadcastReceiver, filter);
+        
+        IntentFilter allAppfilter = new IntentFilter();
+        allAppfilter.addAction("com.xinhua.bootAllApps");
+        registerReceiver(allAppReceiver, allAppfilter);
 
         mRotationEnabled = getResources().getBoolean(R.bool.allow_rotation);
         // In case we are on a device with locked rotation, we should look at preferences to check