Android中加入悬浮窗

悬浮窗可以一直在前台显示一些信息，无论当前的Activity是哪个应用的。比如显示当前的上下行网速等

 

import android.app.Service;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.graphics.PixelFormat;
import android.graphics.Rect;
import android.os.IBinder;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.WindowManager;
import android.view.View.OnTouchListener;
import android.view.WindowManager.LayoutParams;

/**
 * 悬浮窗Service 该服务会在后台一直运行一个悬浮的透明的窗体。
 * 
 * @author
 * 
 */
public class FloatingService extends Service {

	private int statusBarHeight;// 状态栏高度
	private View view;// 透明窗体
	private boolean viewAdded = false;// 透明窗体是否已经显示
	private WindowManager windowManager;
	private WindowManager.LayoutParams layoutParams;

	@Override
	public IBinder onBind(Intent intent) {
		return null;
	}

	@Override
	public void onCreate() {
		super.onCreate();
		view = LayoutInflater.from(this).inflate(R.layout.floating, null);

		windowManager = (WindowManager) this.getSystemService(WINDOW_SERVICE);
		/*
		 * LayoutParams.TYPE_SYSTEM_ERROR：保证该悬浮窗所有View的最上层
		 * LayoutParams.FLAG_NOT_FOCUSABLE:该浮动窗不会获得焦点，但可以获得拖动
		 * PixelFormat.TRANSPARENT：悬浮窗透明
		 */
		layoutParams = new LayoutParams(LayoutParams.WRAP_CONTENT,
				LayoutParams.WRAP_CONTENT, LayoutParams.TYPE_SYSTEM_ERROR,
				LayoutParams.FLAG_NOT_FOCUSABLE, PixelFormat.TRANSPARENT);
		// layoutParams.gravity = Gravity.RIGHT|Gravity.BOTTOM; //悬浮窗开始在右下角显示
		layoutParams.gravity = Gravity.LEFT | Gravity.TOP;

		view.setOnTouchListener(new OnTouchListener() {
			float[] temp = new float[] { 0f, 0f };

			public boolean onTouch(View v, MotionEvent event) {
				layoutParams.gravity = Gravity.LEFT | Gravity.TOP;
				int eventaction = event.getAction();
				switch (eventaction) {
				case MotionEvent.ACTION_DOWN: // 按下事件，记录按下时手指在悬浮窗的XY坐标值
					temp[0] = event.getX();
					temp[1] = event.getY();
					break;

				case MotionEvent.ACTION_MOVE:
					refreshView((int) (event.getRawX() - temp[0]), (int) (event
							.getRawY() - temp[1]));
					break;

				}
				return true;
			}
		});

	}

	/**
	 * 刷新悬浮窗
	 * 
	 * @param x
	 *            拖动后的X轴坐标
	 * @param y
	 *            拖动后的Y轴坐标
	 */
	public void refreshView(int x, int y) {
		//状态栏高度不能立即取，不然得到的值是0
		if(statusBarHeight == 0){
			View rootView  = view.getRootView();
			Rect r = new Rect();
			rootView.getWindowVisibleDisplayFrame(r);
			statusBarHeight = r.top;
		}
		
		layoutParams.x = x;
		// y轴减去状态栏的高度，因为状态栏不是用户可以绘制的区域，不然拖动的时候会有跳动
		layoutParams.y = y - statusBarHeight;//STATUS_HEIGHT;
		refresh();
	}

	/**
	 * 添加悬浮窗或者更新悬浮窗 如果悬浮窗还没添加则添加 如果已经添加则更新其位置
	 */
	private void refresh() {
		if (viewAdded) {
			windowManager.updateViewLayout(view, layoutParams);
		} else {
			windowManager.addView(view, layoutParams);
			viewAdded = true;
		}
	}

	@Override
	public void onStart(Intent intent, int startId) {
		super.onStart(intent, startId);
		refresh();
	}

	/**
	 * 关闭悬浮窗
	 */
	public void removeView() {
		if (viewAdded) {
			windowManager.removeView(view);
			viewAdded = false;
		}
	}

	@Override
	public void onDestroy() {
		super.onDestroy();
		removeView();
	}
	
	
	class StatusBarReceiver extends BroadcastReceiver{

		@Override
		public void onReceive(Context context, Intent intent) {
			//intent.get
		}
		
	}
}

 

floating.xml

 

<?xml version="1.0" encoding="UTF-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
	android:orientation="horizontal" 
	android:layout_width="wrap_content" 
	android:layout_height="wrap_content" 
	
	>
	<!-- android:updatePeriodMillis="10000"> -->
	
    <LinearLayout 
    	android:orientation="horizontal" 
    	android:layout_width="wrap_content" 
    	android:layout_height="wrap_content"
    	android:background="@drawable/floating" 
    	android:gravity="center_vertical"
    	>
    	<ImageView
    	android:layout_width="wrap_content" 
    	android:layout_height="wrap_content" 
    	android:layout_weight="0.5" 
    	android:src="@drawable/upload"/>
        <TextView 
        	android:id="@+id/flowing" 
        	android:layout_width="wrap_content" 
        	android:layout_height="wrap_content"  
        	android:layout_weight="0.5" 
        	android:gravity="right"
        	android:text="0K/s"
        	android:textColor="#000000"
        	/>

        <ImageView
    		android:layout_width="wrap_content" 
    		android:layout_height="wrap_content" 
    		android:layout_weight="0.5" 
    		android:src="@drawable/download"/>
        <TextView 
        	android:gravity="right" 
        	android:id="@+id/flowspeed" 
        	android:paddingRight="10.0dip" 
        	android:layout_width="wrap_content" 
        	android:layout_height="wrap_content" 
        	android:layout_weight="0.5"
        	android:text="17K/s"
        	android:textColor="#000000"
        	 />
        
    </LinearLayout>
    
      
    
    
    
    <ImageButton 
    	android:id="@+id/floating_button_hide" 
    	android:background="@drawable/floatingwindowhidebutton" 
    	android:visibility="gone"
    	android:layout_width="wrap_content" 
    	android:layout_height="wrap_content" 
    	style="\?android:buttonStyleSmall" />
</LinearLayout>

 最后还要在AndroidManifest.xml加一个权限

 

  	<!-- 悬浮窗(FloatingService) permission -->
  	<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />

评论

5 楼 lanxin_zxy_it 2014-10-22  

垃圾残品，发出来很好玩的样子

4 楼 haonanren2bu2 2014-08-08  

有木有做好的工程啊

3 楼 bluejoy34 2013-11-28  

发现将悬浮窗设置为TYPE_SYSTEM_ERROR类型后，虽然锁屏可见，但是却无法调节屏幕亮度了，具体说是屏幕亮度虽然调节了，但是无法马上生效。第三方调节亮度的应用同样无法调节。请问楼主是否有解决办法？

2 楼 大胡子J 2013-05-06  

你好！能否给个源码。[e-mail],谢谢！！

1 楼 hncdcsm1 2012-03-14  

谢谢，非常好的demo