1、获得当前应用包名

public static String getRunningActivityName(Context context) {

ActivityManager activityManager=(ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE); 

//完整类名

String runningActivity=activityManager.getRunningTasks(1).get(0).topActivity.getClassName(); 

String contextActivity = runningActivity.substring(runningActivity.lastIndexOf(".")+1);

return contextActivity;

}

2、获得当前activity的名字

public static String getAppPackageName(Context context){

ActivityManager activityManager = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);

List<ActivityManager.RunningTaskInfo> taskInfo = activityManager.getRunningTasks(1);

ComponentName componentInfo = taskInfo.get(0).topActivity;

Log.d("lixx", "当前应用:" + componentInfo.getPackageName());

return componentInfo.getPackageName();

}

3、推断是否是系统桌面

/**

* 推断当前界面是否是桌面

*/

private boolean isHome() {

ActivityManager mActivityManager = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);

List<RunningTaskInfo> rti = mActivityManager.getRunningTasks(1);

return getHomes().contains(rti.get(0).topActivity.getPackageName());

}





/**

* 获得属于桌面的应用的应用包名称

* 

* @return 返回包括全部包名的字符串列表

*/

private List<String> getHomes() {

List<String> names = new ArrayList<String>();

PackageManager packageManager = this.getPackageManager();

Intent intent = new Intent(Intent.ACTION_MAIN);

intent.addCategory(Intent.CATEGORY_HOME);

List<ResolveInfo> resolveInfo = packageManager.queryIntentActivities(intent,

PackageManager.MATCH_DEFAULT_ONLY);

for (ResolveInfo ri : resolveInfo) {

names.add(ri.activityInfo.packageName);

}

return names;

}

4、典型的service类

public class FloatWindowService extends Service {





/**

* 用于在线程中创建或移除悬浮窗。

*/

private Handler handler = new Handler();





/**

* 定时器。定时进行检測当前应该创建还是移除悬浮窗。

*/

private Timer timer;





@Override

public IBinder onBind(Intent intent) {

return null;

}





@Override

public int onStartCommand(Intent intent, int flags, int startId) {

// 开启定时器，每隔0.5秒刷新一次

if (timer == null) {

timer = new Timer();

timer.scheduleAtFixedRate(new RefreshTask(), 0, 500);

Log.d("lixx", "=====定时刷新，监听悬浮窗的状态=====");

}

return super.onStartCommand(intent, flags, startId);

}





@Override

public void onDestroy() {

super.onDestroy();

// Service被终止的同一时候也停止定时器继续执行

timer.cancel();

timer = null;

}





class RefreshTask extends TimerTask {





@Override

public void run() {

//获得当前activity的名字

String activity_name = MyWindowManager.getRunningActivityName(getApplicationContext());

Log.d("lixx", "activity_name---->" + activity_name);

//获得应用程序包名

String pck_name = MyWindowManager.getAppPackageName(getApplicationContext());

Log.d("lixx", "pck_name---->" + pck_name);



// 当前界面是桌面，且没有悬浮窗显示。则创建悬浮窗。

if (isHome()) {

handler.post(new Runnable() {

@Override

public void run() {

Log.d("lixx", "桌面，移除悬浮窗！");

MyWindowManager.removeSmallWindow(getApplicationContext());

}

});

}else if(!TextUtils.isEmpty(activity_name)){

Log.d("lixx","activity_name is not null");

if(MyWindowManager.isShowingYKQ(activity_name) && pck_name.equals("com.ysten.istouch.client.screenmoving")){

handler.post(new Runnable(){

@Override

public void run(){

MyWindowManager.createSmallWindow(getApplicationContext());

}

});

}else{

handler.post(new Runnable() {

@Override

public void run() {

Log.d("lixx", "遥控器界面。移除悬浮窗！

");

MyWindowManager.removeSmallWindow(getApplicationContext());

}

});

}

}else{

handler.post(new Runnable(){

@Override

public void run(){

MyWindowManager.removeSmallWindow(getApplicationContext());

}

});

}

}





}