[英]Allow phone to vibrate when screen turns off
我正在寻找一种方法,使我的程序可以在屏幕因超时而关闭后振动。 我做了很多研究,还没有发现有用的方法。 我看了PowerManager类,更具体地说是WakeLock机制。 从许多帖子的声音中,我将需要使用WakeLock类的PARTIAL_WAKE_LOCK变量。
PARTIAL_WAKE_LOCK-唤醒锁,可确保CPU正在运行。
但是,当屏幕关闭时,我无法使手机振动。 我知道我正确使用了WakeLock,因为我可以使SCREEN_DIM_WAKE_LOCK正常工作。 我在寻找PARTIAL_WAKE_LOCK吗?
@Override
public void onCreate() {
super.onCreate();
// REGISTER RECEIVER THAT HANDLES SCREEN ON AND SCREEN OFF LOGIC
IntentFilter filter = new IntentFilter(Intent.ACTION_SCREEN_ON);
filter.addAction(Intent.ACTION_SCREEN_OFF);
BroadcastReceiver mReceiver = new ScreenReceiver();
registerReceiver(mReceiver, filter);
}
@Override
public void onStart(Intent intent, int startId) {
boolean screenOn = intent.getBooleanExtra("screen_state", false);
if (!screenOn) {
// Get instance of Vibrator from current Context
Vibrator v = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE);
// This example will cause the phone to vibrate "SOS" in Morse Code
// In Morse Code, "s" = "dot-dot-dot", "o" = "dash-dash-dash"
// There are pauses to separate dots/dashes, letters, and words
// The following numbers represent millisecond lengths
int dot = 200; // Length of a Morse Code "dot" in milliseconds
int dash = 500; // Length of a Morse Code "dash" in milliseconds
int short_gap = 200; // Length of Gap Between dots/dashes
int medium_gap = 500; // Length of Gap Between Letters
int long_gap = 1000; // Length of Gap Between Words
long[] pattern = {
0, // Start immediately
dot, short_gap, dot, short_gap, dot, // s
medium_gap,
dash, short_gap, dash, short_gap, dash, // o
medium_gap,
dot, short_gap, dot, short_gap, dot, // s
long_gap
};
// Only perform this pattern one time (-1 means "do not repeat")
v.vibrate(pattern, -1);
} else {
// YOUR CODE
}
}
注意:您必须在代码块之外将“ uses-permission”行添加到您的Manifest.xml文件中。
<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="...">
<uses-permission android:name="android.permission.VIBRATE"/>
注意:您还必须在真实的电话上测试此代码,仿真器不能篡改
对我来说,解决方案是直接使用没有模式的振动,因此不必使用PowerManager来唤醒锁定。
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