Android实现桌面悬浮窗、蒙板效果实例代码

package com.qust.floatwindow; 
import java.util.Timer; 
import java.util.TimerTask; 
import android.app.Service; 
import android.content.Context; 
import android.content.Intent; 
import android.os.Handler; 
import android.os.IBinder; 
/** 
* 悬浮窗后台服务 
* 
* @author zhaokaiqiang 
* 
*/ 
public class FloatWindowService extends Service { 
public static final String LAYOUT_RES_ID = "layoutResId"; 
public static final String ROOT_LAYOUT_ID = "rootLayoutId"; 
// 用于在线程中创建/移除/更新悬浮窗 
private Handler handler = new Handler(); 
private Context context; 
private Timer timer; 
// 小窗口布局资源id 
private int layoutResId; 
// 布局根布局id 
private int rootLayoutId; 
@Override 
public int onStartCommand(Intent intent, int flags, int startId) { 
context = this; 
layoutResId = intent.getIntExtra(LAYOUT_RES_ID, 0); 
rootLayoutId = intent.getIntExtra(ROOT_LAYOUT_ID, 0); 
if (layoutResId == 0 || rootLayoutId == 0) { 
throw new IllegalArgumentException( 
"layoutResId or rootLayoutId is illegal"); 
} 
if (timer == null) { 
timer = new Timer(); 
// 每500毫秒就执行一次刷新任务 
timer.scheduleAtFixedRate(new RefreshTask(), 0, 500); 
} 
return super.onStartCommand(intent, flags, startId); 
} 
@Override 
public void onDestroy() { 
super.onDestroy(); 
// Service被终止的同时也停止定时器继续运行 
timer.cancel(); 
timer = null; 
} 
private class RefreshTask extends TimerTask { 
@Override 
public void run() { 
// 当前界面没有悬浮窗显示，则创建悬浮 
if (!FloatWindowManager.getInstance(context).isWindowShowing()) { 
handler.post(new Runnable() { 
@Override 
public void run() { 
FloatWindowManager.getInstance(context) 
.createSmallWindow(context, layoutResId, 
rootLayoutId); 
} 
}); 
} 
} 
} 
@Override 
public IBinder onBind(Intent intent) { 
return null; 
} 
}

package com.qust.floatwindow; 
import java.lang.reflect.Field; 
import android.annotation.SuppressLint; 
import android.content.Context; 
import android.graphics.PixelFormat; 
import android.view.Gravity; 
import android.view.LayoutInflater; 
import android.view.MotionEvent; 
import android.view.View; 
import android.view.WindowManager; 
import android.widget.LinearLayout; 
import android.widget.TextView; 
import com.qust.demo.ScreenUtils; 
import com.qust.floatingwindow.R; 
/** 
* 小悬浮窗,用于初始显示 
* 
* @author zhaokaiqiang 
* 
*/ 
public class FloatWindowSmallView extends LinearLayout { 
// 小悬浮窗的宽 
public int viewWidth; 
// 小悬浮窗的高 
public int viewHeight; 
// 系统状态栏的高度 
private static int statusBarHeight; 
// 用于更新小悬浮窗的位置 
private WindowManager windowManager; 
// 小悬浮窗的布局参数 
public WindowManager.LayoutParams smallWindowParams; 
// 记录当前手指位置在屏幕上的横坐标 
private float xInScreen; 
// 记录当前手指位置在屏幕上的纵坐标 
private float yInScreen; 
// 记录手指按下时在屏幕上的横坐标,用来判断单击事件 
private float xDownInScreen; 
// 记录手指按下时在屏幕上的纵坐标,用来判断单击事件 
private float yDownInScreen; 
// 记录手指按下时在小悬浮窗的View上的横坐标 
private float xInView; 
// 记录手指按下时在小悬浮窗的View上的纵坐标 
private float yInView; 
// 单击接口 
private OnClickListener listener; 
/** 
* 构造函数 
* 
* @param context 
* 上下文对象 
* @param layoutResId 
* 布局资源id 
* @param rootLayoutId 
* 根布局id 
*/ 
public FloatWindowSmallView(Context context, int layoutResId, 
int rootLayoutId) { 
super(context); 
windowManager = (WindowManager) context 
.getSystemService(Context.WINDOW_SERVICE); 
LayoutInflater.from(context).inflate(layoutResId, this); 
View view = findViewById(rootLayoutId); 
viewWidth = view.getLayoutParams().width; 
viewHeight = view.getLayoutParams().height; 
statusBarHeight = getStatusBarHeight(); 
TextView percentView = (TextView) findViewById(R.id.percent); 
percentView.setText("悬浮窗"); 
smallWindowParams = new WindowManager.LayoutParams(); 
// 设置显示类型为phone 
smallWindowParams.type = WindowManager.LayoutParams.TYPE_PHONE; 
// 显示图片格式 
smallWindowParams.format = PixelFormat.RGBA_8888; 
// 设置交互模式 
smallWindowParams.flags = WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL 
| WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE; 
// 设置对齐方式为左上 
smallWindowParams.gravity = Gravity.LEFT | Gravity.TOP; 
smallWindowParams.width = viewWidth; 
smallWindowParams.height = viewHeight; 
smallWindowParams.x = ScreenUtils.getScreenWidth(context); 
smallWindowParams.y = ScreenUtils.getScreenHeight(context) / 2; 
} 
@SuppressLint("ClickableViewAccessibility") 
@Override 
public boolean onTouchEvent(MotionEvent event) { 
switch (event.getAction()) { 
// 手指按下时记录必要的数据,纵坐标的值都减去状态栏的高度 
case MotionEvent.ACTION_DOWN: 
// 获取相对与小悬浮窗的坐标 
xInView = event.getX(); 
yInView = event.getY(); 
// 按下时的坐标位置，只记录一次 
xDownInScreen = event.getRawX(); 
yDownInScreen = event.getRawY() - statusBarHeight; 
break; 
case MotionEvent.ACTION_MOVE: 
// 时时的更新当前手指在屏幕上的位置 
xInScreen = event.getRawX(); 
yInScreen = event.getRawY() - statusBarHeight; 
// 手指移动的时候更新小悬浮窗的位置 
updateViewPosition(); 
break; 
case MotionEvent.ACTION_UP: 
// 如果手指离开屏幕时，按下坐标与当前坐标相等，则视为触发了单击事件 
if (xDownInScreen == event.getRawX() 
&& yDownInScreen == (event.getRawY() - getStatusBarHeight())) { 
if (listener != null) { 
listener.click(); 
} 
} 
break; 
} 
return true; 
} 
/** 
* 设置单击事件的回调接口 
*/ 
public void setOnClickListener(OnClickListener listener) { 
this.listener = listener; 
} 
/** 
* 更新小悬浮窗在屏幕中的位置 
*/ 
private void updateViewPosition() { 
smallWindowParams.x = (int) (xInScreen - xInView); 
smallWindowParams.y = (int) (yInScreen - yInView); 
windowManager.updateViewLayout(this, smallWindowParams); 
} 
/** 
* 获取状态栏的高度 
* 
* @return 
*/ 
private int getStatusBarHeight() { 
try { 
Class<?> c = Class.forName("com.android.internal.R$dimen"); 
Object o = c.newInstance(); 
Field field = c.getField("status_bar_height"); 
int x = (Integer) field.get(o); 
return getResources().getDimensionPixelSize(x); 
} catch (Exception e) { 
e.printStackTrace(); 
} 
return 0; 
} 
/** 
* 单击接口 
* 
* @author zhaokaiqiang 
* 
*/ 
public interface OnClickListener { 
public void click(); 
} 
} 

package com.qust.floatwindow; 
import android.content.Context; 
import android.graphics.PixelFormat; 
import android.view.Gravity; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.WindowManager; 
import android.widget.LinearLayout; 
import android.widget.TextView; 
import com.qust.demo.ScreenUtils; 
import com.qust.floatingwindow.R; 
public class FloatWindowBigView extends LinearLayout { 
// 记录大悬浮窗的宽 
public int viewWidth; 
// 记录大悬浮窗的高 
public int viewHeight; 
public WindowManager.LayoutParams bigWindowParams; 
private Context context; 
public FloatWindowBigView(Context context) { 
super(context); 
this.context = context; 
LayoutInflater.from(context).inflate(R.layout.float_window_big, this); 
View view = findViewById(R.id.big_window_layout); 
viewWidth = view.getLayoutParams().width; 
viewHeight = view.getLayoutParams().height; 
bigWindowParams = new WindowManager.LayoutParams(); 
// 设置显示的位置，默认的是屏幕中心 
bigWindowParams.x = ScreenUtils.getScreenWidth(context) / 2 - viewWidth 
/ 2; 
bigWindowParams.y = ScreenUtils.getScreenHeight(context) / 2 
- viewHeight / 2; 
bigWindowParams.type = WindowManager.LayoutParams.TYPE_PHONE; 
bigWindowParams.format = PixelFormat.RGBA_8888; 
// 设置交互模式 
bigWindowParams.flags = WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL 
| WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE; 
bigWindowParams.gravity = Gravity.LEFT | Gravity.TOP; 
bigWindowParams.width = viewWidth; 
bigWindowParams.height = viewHeight; 
initView(); 
} 
private void initView() { 
TextView tv_back = (TextView) findViewById(R.id.tv_back); 
tv_back.setOnClickListener(new OnClickListener() { 
@Override 
public void onClick(View v) { 
FloatWindowManager.getInstance(context).removeBigWindow(); 
} 
}); 
} 
} 

package com.qust.floatwindow; 
import android.content.Context; 
import android.content.Intent; 
import android.view.WindowManager; 
/** 
* 悬浮窗管理器 
* 
* @author zhaokaiqiang 
* 
*/ 
public class FloatWindowManager { 
// 小悬浮窗对象 
private FloatWindowSmallView smallWindow; 
// 大悬浮窗对象 
private FloatWindowBigView bigWindow; 
// 用于控制在屏幕上添加或移除悬浮窗 
private WindowManager mWindowManager; 
// FloatWindowManager的单例 
private static FloatWindowManager floatWindowManager; 
// 上下文对象 
private Context context; 
private FloatWindowManager(Context context) { 
this.context = context; 
} 
public static FloatWindowManager getInstance(Context context) { 
if (floatWindowManager == null) { 
floatWindowManager = new FloatWindowManager(context); 
} 
return floatWindowManager; 
} 
/** 
* 创建小悬浮窗 
* 
* @param context 
* 必须为应用程序的Context. 
*/ 
public void createSmallWindow(Context context, int layoutResId, 
int rootLayoutId) { 
WindowManager windowManager = getWindowManager(); 
if (smallWindow == null) { 
smallWindow = new FloatWindowSmallView(context, layoutResId, 
rootLayoutId); 
windowManager.addView(smallWindow, smallWindow.smallWindowParams); 
} 
} 
/** 
* 将小悬浮窗从屏幕上移除 
* 
* @param context 
*/ 
public void removeSmallWindow() { 
if (smallWindow != null) { 
WindowManager windowManager = getWindowManager(); 
windowManager.removeView(smallWindow); 
smallWindow = null; 
} 
} 
public void setOnClickListener(FloatWindowSmallView.OnClickListener listener) { 
if (smallWindow != null) { 
smallWindow.setOnClickListener(listener); 
} 
} 
/** 
* 创建大悬浮窗 
* 
* @param context 
* 必须为应用程序的Context. 
*/ 
public void createBigWindow(Context context) { 
WindowManager windowManager = getWindowManager(); 
if (bigWindow == null) { 
bigWindow = new FloatWindowBigView(context); 
windowManager.addView(bigWindow, bigWindow.bigWindowParams); 
} 
} 
/** 
* 将大悬浮窗从屏幕上移除 
* 
* @param context 
*/ 
public void removeBigWindow() { 
if (bigWindow != null) { 
WindowManager windowManager = getWindowManager(); 
windowManager.removeView(bigWindow); 
bigWindow = null; 
} 
} 
public void removeAll() { 
context.stopService(new Intent(context, FloatWindowService.class)); 
removeSmallWindow(); 
removeBigWindow(); 
} 
/** 
* 是否有悬浮窗显示(包括小悬浮窗和大悬浮) 
* 
* @return 有悬浮窗显示在桌面上返回true，没有的话返回false 
*/ 
public boolean isWindowShowing() { 
return smallWindow != null || bigWindow != null; 
} 
/** 
* 如果WindowManager还未创建，则创建新的WindowManager返回。否则返回当前已创建的WindowManager 
* 
* @param context 
* @return 
*/ 
private WindowManager getWindowManager() { 
if (mWindowManager == null) { 
mWindowManager = (WindowManager) context 
.getSystemService(Context.WINDOW_SERVICE); 
} 
return mWindowManager; 
} 
} 

package com.qust.demo; 
import android.content.Context; 
import android.view.WindowManager; 
/** 
* 屏幕帮助类 
* 
* @author zhaokaiqiang 
* 
*/ 
public class ScreenUtils { 
/** 
* 获取屏幕宽度 
* 
* @return 
*/ 
@SuppressWarnings("deprecation") 
public static int getScreenWidth(Context context) { 
return ((WindowManager) context 
.getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay() 
.getWidth(); 
} 
/** 
* 获取屏幕宽度 
* 
* @return 
*/ 
@SuppressWarnings("deprecation") 
public static int getScreenHeight(Context context) { 
return ((WindowManager) context 
.getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay() 
.getHeight(); 
} 
}

package com.qust.demo; 
import android.app.Activity; 
import android.content.Context; 
import android.content.Intent; 
import android.os.Bundle; 
import android.view.KeyEvent; 
import android.view.View; 
import com.qust.floatingwindow.R; 
import com.qust.floatwindow.FloatWindowManager; 
import com.qust.floatwindow.FloatWindowService; 
import com.qust.floatwindow.FloatWindowSmallView.OnClickListener; 
/** 
* 示例 
* 
* @ClassName: com.qust.demo.MainActivity 
* @Description: 
* @author zhaokaiqiang 
* @date 2014-10-23 下午11:30:13 
* 
*/ 
public class MainActivity extends Activity { 
private FloatWindowManager floatWindowManager; 
private Context context; 
@Override 
protected void onCreate(Bundle savedInstanceState) { 
super.onCreate(savedInstanceState); 
setContentView(R.layout.activity_main); 
context = this; 
floatWindowManager = FloatWindowManager.getInstance(context); 
} 
/** 
* 显示小窗口 
* 
* @param view 
*/ 
public void show(View view) { 
// 需要传递小悬浮窗布局，以及根布局的id，启动后台服务 
Intent intent = new Intent(context, FloatWindowService.class); 
intent.putExtra(FloatWindowService.LAYOUT_RES_ID, 
R.layout.float_window_small); 
intent.putExtra(FloatWindowService.ROOT_LAYOUT_ID, 
R.id.small_window_layout); 
startService(intent); 
} 
/** 
* 显示二级悬浮窗 
* 
* @param view 
*/ 
public void showBig(View view) { 
// 设置小悬浮窗的单击事件 
floatWindowManager.setOnClickListener(new OnClickListener() { 
@Override 
public void click() { 
floatWindowManager.createBigWindow(context); 
} 
}); 
} 
/** 
* 移除所有的悬浮窗 
* 
* @param view 
*/ 
public void remove(View view) { 
floatWindowManager.removeAll(); 
} 
@Override 
public boolean onKeyDown(int keyCode, KeyEvent event) { 
// 返回键移除二级悬浮窗 
if (keyCode == KeyEvent.KEYCODE_BACK 
&& event.getAction() == KeyEvent.ACTION_DOWN) { 
floatWindowManager.removeBigWindow(); 
return true; 
} 
return super.onKeyDown(keyCode, event); 
} 
}