Question

我正在寻找一种方法，允许我的程序在屏幕关闭超时后让手机振动。我做了很多研究，但没有找到有用的东西。我查看了PowerManager类，更具体地说是WakeLock机制。从很多帖子的声音来看，我需要使用WakeLock类的PARTIAL_WAKE_LOCK变量。

PARTIAL_WAKE_LOCK - 唤醒锁定，确保CPU正在运行。

然而，当屏幕关闭时，我无法让手机振动。我知道我正在使用WakeLock，因为我可以使SCREEN_DIM_WAKE_LOCK正常工作。我正在寻找PARTIAL_WAKE_LOCK吗？

Answer 1

 @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

        }

    }

注意你必须将use-permission行添加到块外的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：您还必须在真实手机上测试此代码，模拟器无法振动

Answer 2

对我来说，解决方案是直接使用没有模式的振动，所以我不必使用PowerManager唤醒锁定。

屏幕关闭时允许手机振动

2 个答案: