怎样在安卓中实现在锁屏状态下弹出对话框，并可以震动和铃声，就像闹钟似的？

============问题描述============

我想要在应用弹出对话框，程序在后台运行，当达到条件后弹出对话框并有震动和铃声，但是在锁屏状态下却没反应，有什么办法解决吗？

============解决方案1============

//点亮屏幕

PowerManager pm = (PowerManager)getSystemService(POWER_SERVICE);

mWakelock = pm.newWakeLock(PowerManager.ACQUIRE_CAUSES_WAKEUP |PowerManager.SCREEN_DIM_WAKE_LOCK, "SimpleTimer");

mWakelock.acquire();

//.......

mWakelock.release();

点亮屏幕需要权限：

<uses-permission android:name="android.permission.WAKE_LOCK"/>

============解决方案2============

按照LS的方法 请求强制打开锁，会出现按Power键,系统也不会进入Sleep的现象

建议参考如下方法，让对话框在锁屏界面上方显示

onCreate方法时使用

requestWindowFeature(Window.FEATURE_NO_TITLE); //hide title

Window win = getWindow();

WindowManager.LayoutParams winParams = win.getAttributes();

winParams.flags |= (WindowManager.LayoutParams.FLAG_DISMISS_KEYGUARD

| WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED

| WindowManager.LayoutParams.FLAG_ALLOW_LOCK_WHILE_SCREEN_ON

| WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON);

setRequestedOrientation(0);

在OnResume时使用

protected void onResume() {

super.onResume();

acquireWakeLock();

}

private void acquireWakeLock() {

if (mWakelock == null) {

Log.i(TAG, "Activity begin start ");

PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);

mWakelock = pm.newWakeLock(PowerManager.SCREEN_DIM_WAKE_LOCK, this.getClass().getCanonicalName());

mWakelock.acquire();

}

在onPause

protected void onPause() {

super.onPause();

......

releaseWakeLock();

}

private void releaseWakeLock() {

if (mWakelock != null && mWakelock.isHeld()) {

mWakelock.release();

mWakelock = null;

}

希望对LZ有所帮助！