浮窗WindowManager view返回和Home按鍵事件監聽

出於功能需求，須要在全部的view之上顯示浮窗，因而須要在WindowManager的View上處理返回鍵的響應，

mFloatingWindowView =  layoutInflater.inflate(R.layout.floating_window, null, false);


mFloatingWindowLayoutParams = new WindowManager.LayoutParams();

  // 設置window type
 mUserConversationWindowParams.type = WindowManager.LayoutParams.TYPE_SYSTEM_ERROR;

 mUserConversationWindowParams.format = PixelFormat.TRANSLUCENT;// 設置圖片格式，效果爲背景透明

 // 設置Window flag
 mUserConversationWindowParams.flags =
 //可以使用FLAG_DISMISS_KEYGUARD選項直接解除非加鎖的鎖屏狀態。此選項只用於最頂層的全屏幕窗口。
 WindowManager.LayoutParams.FLAG_DISMISS_KEYGUARD
 
 | WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL //必須 設置窗口不攔截窗口範圍以外事件
 
 |WindowManager.LayoutParams.FLAG_WATCH_OUTSIDE_TOUCH // 必須 設置在有FLAG_NOT_TOUCH_MODAL屬性時，窗口以外事件發生時本身也獲取事件

 | WindowManager.LayoutParams.FLAG_HARDWARE_ACCELERATED;

mWindowManager.addView(mFloatingWindowView, mFloatingWindowLayoutParams);

這裏千萬要注意不能用WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE，我就是死在這上面的，若是設置成FLAG_NOT_FOCUSABLE，死都收不到返回鍵的事件的!

 

import android.content.Context;
import android.util.AttributeSet;
import android.view.KeyEvent;
import android.widget.LinearLayout;

/**
 * Created by KB-Shirlman on 4/26/2016.
 */
public class FloatingWindowView extends LinearLayout {
    public FloatingWindowView(Context context) {
        super(context);
    }

    public FloatingWindowView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public FloatingWindowView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }

    @Override
    public boolean dispatchKeyEvent(KeyEvent event) {
        if (event.getKeyCode() == KeyEvent.KEYCODE_BACK
                || event.getKeyCode() == KeyEvent.KEYCODE_SETTINGS) {

if(event.getAction()==KeyEvent.ACTION_DOWN){ //按鍵 按下和移開會有兩個不一樣的事件因此須要區分
 closecao(); //點擊返回 要執行的方法
}

} return super.dispatchKeyEvent(event); }  }

 

floating_window.xml

<?xml version="1.0" encoding="utf-8"?> <YOUR.PACKAGE.NAME.FloatingWindowView xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" android:weightSum="1"> </YOUR.PACKAGE.NAME.FloatingWindowView>

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<?xml version="1.0" encoding="utf-8"?> <YOUR.PACKAGE.NAME.FloatingWindowView     xmlns:android="http://schemas.android.com/apk/res/android"     android:layout_width="fill_parent"     android:layout_height="fill_parent"     android:orientation="vertical"     android:weightSum="1">      </YOUR.PACKAGE.NAME.FloatingWindowView>

下面附贈哪都能搜索的到的WidnowManager Home按鍵監聽。

private IntentFilter mHomeFilter = new IntentFilter(Intent.ACTION_CLOSE_SYSTEM_DIALOGS); private BroadcastReceiver mHomeListenerReceiver = new BroadcastReceiver() { final String SYSTEM_DIALOG_REASON_KEY = "reason"; final String SYSTEM_DIALOG_REASON_HOME_KEY = "homekey"; @Override public void onReceive(Context context, Intent intent) { String action = intent.getAction(); String reason = intent.getStringExtra(SYSTEM_DIALOG_REASON_KEY); if (action.equals(Intent.ACTION_CLOSE_SYSTEM_DIALOGS) && reason != null && reason.equals(SYSTEM_DIALOG_REASON_HOME_KEY)) { closeFloatingWindow(); } } };

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private IntentFilter mHomeFilter = new IntentFilter(Intent.ACTION_CLOSE_SYSTEM_DIALOGS);   private BroadcastReceiver mHomeListenerReceiver = new BroadcastReceiver() { final String SYSTEM_DIALOG_REASON_KEY = "reason"; final String SYSTEM_DIALOG_REASON_HOME_KEY = "homekey";   @Override public void onReceive(Context context, Intent intent) { String action = intent.getAction(); String reason = intent.getStringExtra(SYSTEM_DIALOG_REASON_KEY);   if (action.equals(Intent.ACTION_CLOSE_SYSTEM_DIALOGS) && reason != null && reason.equals(SYSTEM_DIALOG_REASON_HOME_KEY)) { closeFloatingWindow(); } } };

打開浮窗時調用：

this.registerReceiver(mHomeListenerReceiver, mHomeFilter);

1	this.registerReceiver(mHomeListenerReceiver, mHomeFilter);

關閉浮窗時調用：

this.unregisterReceiver(mHomeListenerReceiver);

1	this.unregisterReceiver(mHomeListenerReceiver);