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。

.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

frameworks\base\services\core\java\com\android\server\policy\PhoneWindowManager.java 对导航栏的手势

// monitor for system gestures
mSystemGestures = new SystemGesturesPointerEventListener(context,
        new SystemGesturesPointerEventListener.Callbacks() {
            @Override
            public void onSwipeFromTop() {
                if (mStatusBar != null) {
                    requestTransientBars(mStatusBar);
                }
                 
                if(SystemProperties.get("persist.sys.gesshownavibar","0").equals("1"))
                                  {
                                        if(SystemProperties.get("persist.sys.hidenavibar","0").equals("1"))
                                        {
                                              addBar();
                                          }
                                  }
            }
            @Override
            public void onSwipeFromBottom() {
                if (mNavigationBar != null && mNavigationBarPosition == NAV_BAR_BOTTOM) {
                    requestTransientBars(mNavigationBar);
                }
                if(SystemProperties.get("persist.sys.gesshownavibar","0").equals("1"))
                                  {
                                        if(SystemProperties.get("persist.sys.hidenavibar","0").equals("1"))
                                        {
                                              addBar();
                                          }
                                  }
            }
            @Override
            public void onSwipeFromRight() {
                if (mNavigationBar != null && mNavigationBarPosition == NAV_BAR_RIGHT) {
                    requestTransientBars(mNavigationBar);
                }
            }
            @Override
            public void onSwipeFromLeft() {
                if (mNavigationBar != null && mNavigationBarPosition == NAV_BAR_LEFT) {
                    requestTransientBars(mNavigationBar);
                }
            }
            @Override
            public void onFling(int duration) {
                if (mPowerManagerInternal != null) {
                    mPowerManagerInternal.powerHint(
                            PowerManagerInternal.POWER_HINT_INTERACTION, duration);
                }
            }

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

使用自定义的广播，然后用命令行测试的时候出现如下warning:
原因：系统对自定义广播做了保护限制对广播做了保护限定之后只有一定权限的用户才可以使用否则用一次就会打印一次warning 并且保存异常信息到文件中所以要在清单文件中注册广播

--- 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

三. 系统手势发出back键值

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 ecfe39b..0a639a2 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
@@ -1927,6 +1927,15 @@ public class PhoneWindowManager implements WindowManagerPolicy {
                         }
                     }
                     @Override
+                    public void onMorePointerSwipe() {
+                       try{
+                            Runtime. getRuntime().exec("input keyevent 4");
+                        }catch(IOException e) {
+                           e.printStackTrace();
+                        } 
+                    }                  
+                   
+                    @Override
                     public void onFling(int duration) {
                         if (mPowerManagerInternal != null) {
                             mPowerManagerInternal.powerHint(
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
index 598c58e..9d131ff 100755
--- a/frameworks/base/services/core/java/com/android/server/policy/SystemGesturesPointerEventListener.java
+++ b/frameworks/base/services/core/java/com/android/server/policy/SystemGesturesPointerEventListener.java
@@ -44,7 +44,9 @@ 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 static boolean Success = false;
+    
     private final Context mContext;
     private final int mSwipeStartThreshold;
     private final int mSwipeDistanceThreshold;
@@ -103,7 +105,14 @@ public class SystemGesturesPointerEventListener implements PointerEventListener
                     mMouseHoveringAtEdge = false;
                     mCallbacks.onMouseLeaveFromEdge();
                 }
+                mCallbacks.onDown();               
                 mCallbacks.onDown();
+                Success = true;
+               float xhgetX = event.getRawX();
+                float xhgetY = event.getRawY();              
+               if (xhgetX < 300.00 && xhgetY < 300.00 ){             
+                   XhDown = true;
+               }                               
                 break;
             case MotionEvent.ACTION_POINTER_DOWN:
                 captureDown(event, event.getActionIndex());
@@ -131,8 +140,14 @@ public class SystemGesturesPointerEventListener implements PointerEventListener
                     } else if (swipe == SWIPE_FROM_LEFT) {
                         if (DEBUG) Slog.d(TAG, "Firing onSwipeFromLeft");
                         mCallbacks.onSwipeFromLeft();
-                    }
-                }
+                    }                  
+                }                                  
+                   float XhgetX = event.getRawX();
+                    float XhgetY = event.getRawY();                    
+                   if (Success && XhDown  && XhgetX > 560.00 && XhgetX < 1360.00 && XhgetY > 400.00 && XhgetY < 740.00){
+                       Success = false;
+                       mCallbacks.onMorePointerSwipe();
+                   }
                 break;
             case MotionEvent.ACTION_HOVER_MOVE:
                 if (event.isFromSource(InputDevice.SOURCE_MOUSE)) {
@@ -150,6 +165,8 @@ public class SystemGesturesPointerEventListener implements PointerEventListener
                 }
                 break;
             case MotionEvent.ACTION_UP:
+                    Success = true;
+                   XhDown = false;             
             case MotionEvent.ACTION_CANCEL:
                 mSwipeFireable = false;
                 mDebugFireable = false;
@@ -282,5 +299,6 @@ public class SystemGesturesPointerEventListener implements PointerEventListener
         void onMouseHoverAtBottom();
         void onMouseLeaveFromEdge();
         void onDebug();
+       void onMorePointerSwipe();
     }
 }

posted @ 2020-08-26 15:09 CrushGirl 阅读(1081) 评论(0) 编辑收藏举报

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RK:系统手势监听

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