我知道这听起来很奇怪，但我创建了一个简单的计时器，带有一个activity和一个service（启动和绑定）。
在活动中，我还实施onStart并onStop仅记录一条消息（Log.d（TAG，“活动开始/停止”）。
事实是，如果手机连接到电脑，一切似乎都可以正常工作。我可以启动计时器，暂停它，修改并重新启动它。打开其他应用程序，它会继续在后台运行。我记得它，我看到实际的倒计时正在下降。如果它完成，我可以从通知中召回活动并停止响铃。等等等等
如果手机与电脑分离，它就像根本没有服务一样工作。所以活动运行，如果我按下主页按钮，它会在后台运行并继续工作几分钟而不是停止。
我可以在正在运行的应用程序中看到该进程，如果我回忆起该活动，它会从它暂停的点重新启动。也就是说，我设置了 10 分钟，我点击开始，然后点击主页按钮。2-3 分钟后它停止工作，如果我记得活动，它会继续从 8-7 分钟倒计时......
任何想法？
活动：
package com.sleone.cookingtimer;
import com.sleone.cookingtimer.TimerService.LocalBinder;
import android.os.Bundle;
import android.os.IBinder;
import android.app.Activity;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.ServiceConnection;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import kankan.wheel.widget.WheelView;
import kankan.wheel.widget.adapters.NumericWheelAdapter;
import android.util.Log;
public class TimerMainActivity extends Activity {
// private CookingTimer timer;
// suppressWarnings because is initialized binding to the service
private TimerService timerService;
private Intent timerServiceIntent;
private final String TAG = "TimerMainActivity";
private WheelView hoursWheel ;
private WheelView minutesWheel;
private WheelView secondsWheel;
/*
* Initialize the activity
*/
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_timer_main);
timerServiceIntent = new Intent(this, TimerService.class);
startTimerService();
// init the gui
hoursWheel = (WheelView) findViewById(R.id.hoursWheelView);
minutesWheel = (WheelView) findViewById(R.id.minutesWheelView);
secondsWheel = (WheelView) findViewById(R.id.secondsWheelView);
hoursWheel.setViewAdapter(new NumericWheelAdapter(this, 0, 6));
minutesWheel.setViewAdapter(new NumericWheelAdapter(this, 0, 59));
secondsWheel.setViewAdapter(new NumericWheelAdapter(this, 0, 59));
}
@Override
protected void onStop(){
super.onStop();
Log.d(TAG, "TimerMainActivity stopped");
}
@Override
protected void onStart(){
super.onStart();
Log.d(TAG, "TimerMainActivity started");
}
private void startTimerService() {
// connect to the service
// leave the service in background
Log.d(TAG, "Starting the TimerService");
startService(timerServiceIntent);
// interact with the service
Log.d(TAG, "Binding to the TimerService");
bindService(timerServiceIntent, mConnection, Context.BIND_AUTO_CREATE);
}
private void stopTimerService() {
unbindService(mConnection);
stopService(timerServiceIntent);
}
/*
* Disconnect from the service
*/
@Override
protected void onDestroy() {
Log.d(TAG, "Stopping TimerService");
super.onStop();
stopTimerService();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.timer_main, menu);
return true;
}
public void controlTimer(View view) {
Button controlButton = (Button) findViewById(R.id.controlTimerButton);
if (controlButton.getText().equals(
getResources().getText(R.string.startTimer))) {
if ((hoursWheel.getCurrentItem() == 0)
&& (minutesWheel.getCurrentItem() == 0)
&& (secondsWheel.getCurrentItem() == 0)) {
return;
}
controlButton.setText(R.string.stopTimer);
timerService.startTimer();
} else {
controlButton.setText(R.string.startTimer);
timerService.stopTimer();
}
}
/* Defines callbacks for service binding, passed to bindService() */
private ServiceConnection mConnection = new ServiceConnection() {
@Override
public void onServiceConnected(ComponentName className, IBinder service) {
// We've bound to LocalService, cast the IBinder and get
// LocalService instance
LocalBinder binder = (LocalBinder) service;
timerService = binder.getService();
binder.createCookingTimer(TimerMainActivity.this);
Log.d(TAG, "onServiceConnected() finished");
}
@Override
public void onServiceDisconnected(ComponentName arg0) {
Log.e(TAG, "TimerService unexpectedly disconnected!!");
}
};
}
服务：
package com.sleone.cookingtimer;
import android.app.Service;
import android.content.Intent;
import android.os.Binder;
import android.os.IBinder;
public class TimerService extends Service{
// Binder given to clients
private final IBinder mBinder = new LocalBinder();
private CookingTimer timer;
//private int timerServiceId;
public class LocalBinder extends Binder {
public TimerService getService() {
// Return this instance of LocalService so clients can call public methods
return TimerService.this;
}
// when the client connects to the service instantiate the CookingImer
public void createCookingTimer(TimerMainActivity timerMainActivity){
timer = new CookingTimer(timerMainActivity);
}
}
public void startTimer(){
timer.startTimer();
}
public void stopTimer(){
timer.stopTimer();
}
@Override
public IBinder onBind(Intent arg0) {
// TODO Auto-generated method stub
return mBinder;
}
}
我认为您不需要计时器本身。它只是一个CountDownTimer它onTick更新小时/分钟/秒轮并onFinish播放声音并创建一个notification.