我有一个应用程序,它具有启动应用程序、潘多拉站或快捷方式的功能。这一切都很好。稍后我想停止我启动的应用程序。这适用于大多数事情,除了 Pandora 和 Spotify 并不总是关闭。有时他们会这样做,但并非总是如此。它似乎与当前的 UI 状态有关。例如,当我显示 Pandora 或显示主屏幕时,它工作正常。当 Home Dock 或 Car Mode 处于活动状态时,它不起作用。您可以在此处查看我的所有源代码:http ://code.google.com/p/a2dpvolume/ service.java 是具有此功能的文件。
这是该代码的一部分,它试图阻止音乐播放然后停止应用程序。
if (bt2.hasIntent()) {
// if music is playing, pause it
if (am2.isMusicActive()) {
// first pause the music so it removes the notify icon
Intent i = new Intent("com.android.music.musicservicecommand");
i.putExtra("command", "pause");
sendBroadcast(i);
// for more stubborn players, try this too...
Intent downIntent2 = new Intent(Intent.ACTION_MEDIA_BUTTON, null);
KeyEvent downEvent2 = new KeyEvent(KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_MEDIA_STOP);
downIntent2.putExtra(Intent.EXTRA_KEY_EVENT, downEvent2);
sendOrderedBroadcast(downIntent2, null);
}
// if we opened a package for this device, try to close it now
if (bt2.getPname().length() > 3 && bt2.isAppkill()) {
// also open the home screen to make music app revert to
// background
Intent startMain = new Intent(Intent.ACTION_MAIN);
startMain.addCategory(Intent.CATEGORY_HOME);
startMain.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(startMain);
// now we can kill the app is asked to
final String kpackage = bt2.getPname();
CountDownTimer killTimer = new CountDownTimer(6000, 3000) {
@Override
public void onFinish() {
try {
stopApp(kpackage);
} catch (Exception e) {
e.printStackTrace();
Log.e(LOG_TAG, "Error " + e.getMessage());
}
}
@Override
public void onTick(long arg0) {
if (am2.isMusicActive()) {
// for more stubborn players, try this too...
Intent downIntent2 = new Intent(Intent.ACTION_MEDIA_BUTTON, null);
KeyEvent downEvent2 = new KeyEvent(KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_MEDIA_STOP);
downIntent2.putExtra(Intent.EXTRA_KEY_EVENT, downEvent2);
sendOrderedBroadcast(downIntent2, null);
}
try {
stopApp(kpackage);
} catch (Exception e) {
e.printStackTrace();
Log.e(LOG_TAG, "Error " + e.getMessage());
}
}
};
killTimer.start();
}
}
这是函数 stopApp()。
protected void stopApp(String packageName) {
Intent mIntent = getPackageManager().getLaunchIntentForPackage(
packageName);
if (mIntent != null) {
try {
ActivityManager act1 = (ActivityManager) this
.getSystemService(ACTIVITY_SERVICE);
// act1.restartPackage(packageName);
act1.killBackgroundProcesses(packageName);
List<ActivityManager.RunningAppProcessInfo> processes;
processes = act1.getRunningAppProcesses();
for (ActivityManager.RunningAppProcessInfo info : processes) {
for (int i = 0; i < info.pkgList.length; i++) {
if (info.pkgList[i].contains(packageName)) {
android.os.Process.killProcess(info.pid);
}
}
}
} catch (ActivityNotFoundException err) {
err.printStackTrace();
Toast t = Toast.makeText(getApplicationContext(),
R.string.app_not_found, Toast.LENGTH_SHORT);
if (notify)
t.show();
}
}
}
有没有其他人遇到过这个问题?如何可靠地停止启动的应用程序?我需要先让它暂停并将其置于后台。这就是我遇到的问题。它适用于大多数情况,但不是全部。在某些情况下,Pandora 和 Spotify 不会响应正在发送的关键事件,它们只是继续播放。这使通知图标保持活动状态并使应用程序成为前台活动,因此我无法停止它。