WakeLock不工作工作、WakeLock
我有一个唤醒锁设置，让我仍然可以听到声音的时候，屏幕超时或I preSS的屏幕锁键。从我可以通过网上阅读理解的是，我只需要一个局部唤醒锁。这里是code，但它不能正常工作。没有logcat的错误
包com.androidsleepmachine.gamble;
进口android.app.Activity;
进口android.content.Context;
进口android.media.MediaPlayer;
进口android.os.Bundle;
进口android.os.Handler;
进口android.os.PowerManager;
进口android.view.KeyEvent;
进口android.view.View;
进口android.widget.ArrayAdapter;
进口android.widget.Button;
进口android.widget.Spinner;
公共类船舶扩展活动实现View.OnClickListener {
公共静态最终整数[] TIME_IN_MINUTES = {30，45，60，180，360};
公众的MediaPlayer媒体播放器;
公开处理程序处理程序=新的处理程序（）;
公众按钮按钮2;
公共微调spinner2;
私人PowerManager.WakeLock WL;
//初始化活动
@覆盖
公共无效的onCreate（包savedInstanceState）{
电源管理器PM =（电源管理器）getSystemService（Context.POWER_SERVICE）;
WL = pm.newWakeLock（PowerManager.PARTIAL_WAKE_LOCKsleeplock）;
super.onCreate（savedInstanceState）;
的setContentView（R.layout.ship）;
按钮2 =（按钮）findViewById（R.id.btn2）;
button2.setOnClickListener（本）;
spinner2 =（微调）findViewById（R.id.spinner2）;
ArrayAdapter＆LT;整数GT;适配器=新的ArrayAdapter＆LT;整数GT;（这一点，
android.R.layout.simple_spinner_item，TIME_IN_MINUTES）;
adapter.setDropDownViewResource（android.R.layout.simple_spinner_dropdown_item）;
spinner2.setAdapter（适配器）;
}
//播放声音，并开始计时
私人无效playSound（INT RESOURCEID）{
//清除任何previous声音文件
清理（）;
//创建一个新的媒体播放器实例和启动
媒体播放器= MediaPlayer.create（这一点，RESOURCEID）;
mediaPlayer.start（）;
//创建计时器停止毫秒x次后声音
INT selectedTime = TIME_IN_MINUTES [spinner2.getSelectedItemPosition（）];
handler.postDelayed（可运行，selectedTime * 60 * 1000）;
}
//手柄按钮回调
@覆盖
公共无效的onClick（视图v）{
开关（v.getId（））{
案例R.id.btn2：
wl.acquire（）;
playSound（R.raw.ocean_ship）;
打破;
}
}
保护无效的onStop（）
{
清理（）;
super.onStop（）;
}
//停止声音和清理媒体播放器
公共无效清除（）{
如果（媒体播放器！= NULL）{
mediaPlayer.stop（）;
mediaPlayer.release（）;
媒体播放器= NULL;
wl.release（）;
}
//取消任何previously运行的任务
handler.removeCallbacks（可运行）;
}
//使用的处理Runnable任务停止声音
市民可运行可运行=新的Runnable（）{
公共无效的run（）{
清理（）;
}
};
}
解决方案
我会感到惊讶，如果迪维罗实验室的回答解决了这一点，因为Android的文件说，这些额外的国旗做什么用的部分wakelock。
为您正在使用它，它应该工作wakelock很简单：
PowerManager的PM =（电源管理器）getSystemService（Context.POWER_SERVICE）;
WL = pm.newWakeLock（PowerManager.PARTIAL_WAKE_LOCKsleeplock）;
wl.acquire（）;
//推出
wl.release（）;
请注意，您将需要检查空值，并检查尚未取得，等做这些方法之前，或者你可能会得到一个空指针异常。
我觉得你的问题是，你正在调用清理（），其中包括wakelock释放，所以你是不是真的拿着wakelock。为了确保这一工作（尽管可能会导致电池消耗问题）把你wakelock前期，然后松开，当您完成，在此之前你做别的，你会明显地没有wakelock。
我有一吨的，因为wakelocks不工作的问题，但相信我明确了这个问题到自定义ROM。所以要小心！ （不要支持自定义光盘，包括你自己！）
I have a wake lock set up so that I can still hear the sound when the screen times out or I press the screen lock button. From what I can understand through reading online is that I only need a partial wake lock. Here is the code but it is not working. No logcat errors
package com.androidsleepmachine.gamble;
import android.app.Activity;
import android.content.Context;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.os.Handler;
import android.os.PowerManager;
import android.view.KeyEvent;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.Spinner;
public class Ship extends Activity implements View.OnClickListener {
public static final Integer[] TIME_IN_MINUTES = { 30, 45, 60, 180, 360 };
public MediaPlayer mediaPlayer;
public Handler handler = new Handler();
public Button button2;
public Spinner spinner2;
private PowerManager.WakeLock wl;
// Initialize the activity
@Override
public void onCreate(Bundle savedInstanceState) {
PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
wl = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "sleeplock");
super.onCreate(savedInstanceState);
setContentView(R.layout.ship);
button2 = (Button) findViewById(R.id.btn2);
button2.setOnClickListener(this);
spinner2 = (Spinner) findViewById(R.id.spinner2);
ArrayAdapter<Integer> adapter = new ArrayAdapter<Integer>(this,
android.R.layout.simple_spinner_item, TIME_IN_MINUTES);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner2.setAdapter(adapter);
}
// Play the sound and start the timer
private void playSound(int resourceId) {
// Cleanup any previous sound files
cleanup();
// Create a new media player instance and start it
mediaPlayer = MediaPlayer.create(this, resourceId);
mediaPlayer.start();
// Create the timer to stop the sound after x number of milliseconds
int selectedTime = TIME_IN_MINUTES[spinner2.getSelectedItemPosition()];
handler.postDelayed(runnable, selectedTime * 60 * 1000);
}
// Handle button callback
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.btn2:
wl.acquire();
playSound(R.raw.ocean_ship);
break;
}
}
protected void onStop()
{
cleanup();
super.onStop();
}
// Stop the sound and cleanup the media player
public void cleanup() {
if (mediaPlayer != null) {
mediaPlayer.stop();
mediaPlayer.release();
mediaPlayer = null;
wl.release();
}
// Cancel any previously running tasks
handler.removeCallbacks(runnable);
}
// Runnable task used by the handler to stop the sound
public Runnable runnable = new Runnable() {
public void run() {
cleanup();
}
};
}
解决方案
I would be surprised if Di Vero Labs's answer resolved this since Android documentation says those additional flags do nothing with a partial wakelock.
A wakelock is as simple as you are using it, and it should work:
PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
wl = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "sleeplock");
wl.acquire();
//release
wl.release();
Note that you will need to check for nulls, and check that it is not already acquired, etc before doing these methods or you may get a null pointer exception.
I think your issue is that you are calling cleanup() which includes the wakelock release so you aren't really holding a wakelock. To make sure this works (though might cause battery drain issues) hold your wakelock upfront, then release when you are done, not before you are done else you'll obviously NOT have a wakelock.
I was having a ton of issues because wakelocks weren't working but believe I nailed down the issue to a custom ROM. So beware! (DONT support custom ROMs, including your own!)
