如何在按下一次按钮后每隔10分钟重复一次方法，并在另一次按下按钮时结束
如何在按下一次按钮后每隔10分钟重复一次方法，并在另一次按下按钮时结束
提问于 2012-04-19 13:10:39
我正在编写一个Android应用程序，检索手机的当前位置，并将其发送到and服务器。我希望能够按下开始按钮，让应用程序以预定的间隔(例如每10分钟)继续检索和发送位置，然后在另一次按下按钮时停止。
下面是我的按钮的代码：
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
startButton.setOnClickListener(new OnClickListener() {
@Override
//When the button is clicked
public void onClick(View v) {
finishButton.setEnabled(true);
startButton.setEnabled(false);
//Loops every 10mins
pingCurrentLocation();
}
});
finishButton.setOnClickListener(new OnClickListener() {
@Override
//When the button is clicked
public void onClick(View v) {
startButton.setEnabled(true);
finishButton.setEnabled(false);
pingCurrentLocation();
}
});
}pingCurrentLocation是获取位置并将其发送的函数。
我知道使用AlarmManager可能会达到我想要的效果，但我一直无法理解其中的任何一点。是否有任何明确的步骤或模板，将在我的情况下工作。
回答 3
Stack Overflow用户
发布于 2012-04-19 21:12:32
这就是我所做的。
首先创建一个告警管理器对象，并设置重复定时器
AlarmManager alarmMgr = alarmMgr=(AlarmManager)context.getSystemService(Context.ALARM_SERVICE);
Intent alarmIntent = alarmIntent = new Intent("AlarmIntentReceiver");
PendingIntent pendingAlarmIntent = pendingAlarmIntent = PendingIntent.getBroadcast(context.getApplicationContext(), 0, alarmIntent, 0);
alarmMgr.setRepeating(AlarmManager.ELAPSED_REALTIME_WAKEUP, 30*1000, 3*60*1000, pendingAlarmIntent); //start in 30 secs and rest in 3 mins interval基于该意图名称创建了一个活动，该活动将捕获该意图并在指定的时间间隔内执行其代码，如果愿意，您还可以创建一个广播接收器。
若要在按钮单击事件中取消它，请执行以下操作。写这篇文章
alarmMgr.cancel(pendingAlarmIntent);Stack Overflow用户
发布于 2012-04-19 13:27:27
您可以启动一项服务，该服务将检查用户位置并将其发送到您指定的网址，如下所述。
您可以获得有关服务here的更多信息
public class TaxiLocationUpdator extends Service{
Location location;
Timer timer = new Timer();
private final Handler handler = new Handler();
Intent intent;
@Override
public IBinder onBind(Intent arg0) {
// TODO Auto-generated method stub
return null;
}
public void onCreate(){
super.onCreate();
updateNotification();
}
//int onStartCommand(Intent intent, int flags, int startId)
public void onStart(Intent intent,int startId){
super.onStart(intent, startId);
handler.removeCallbacks(sendUpdatesToUI);
handler.postDelayed(sendUpdatesToUI, 1000); // 1 second
Log.v("Location Servics", "Start Service");
}
private Runnable sendUpdatesToUI = new Runnable() {
public void run() {
DisplayLoggingInfo();
handler.postDelayed(this, 15000); // 60 seconds here you can give your time
}
};
public void onDestroy(){
super.onDestroy();
Log.v("Location Servics", "Destroy Service");
}
public boolean isOnline(){
ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo netInfo = cm.getActiveNetworkInfo();
boolean isconnected;
if (netInfo==null || !netInfo.isConnected())
isconnected=false;
else
isconnected=true;
Log.v("isOnliNe",isconnected+"");
return isconnected;
}
protected void updateNotification() {
LocationManager lm = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
LocationListener locationListener = new MyLocationlistener();
lm.requestLocationUpdates(LocationManager.GPS_PROVIDER, normallocationwait, 0.250f, locationListener);
location = lm.getLastKnownLocation(LocationManager.GPS_PROVIDER);
}
private class MyLocationlistener implements LocationListener {
public void onLocationChanged(Location location){
if(location!=null){
if(location.hasAccuracy()){
dumpLocation(location);
}else{
dumpLocation(location);
}
}
}
public void onProviderDisabled(String provider){
Log.v("Loc Update","\nProvider disabled: " + provider);
}
public void onProviderEnabled(String provider){
Log.v("Loc Update","\nProvider enabled: " + provider);
}
public void onStatusChanged(String provider, int status, Bundle extras){
Log.v("Loc Update","\nProvider status changed: " + provider + ", status="
+ status + ", extras=" + extras);
}
private void dumpLocation(Location location) {
if (location == null)
Log.v("Loc Update","\nLocation[unknown]");
else{
Log.v("Loc Update","\n" + location.toString());
Log.v("Demo", location.toString());
String url = Your url;
Toast.makeText(getBaseContext(), "Location Update", Toast.LENGTH_SHORT).show();
if(isOnline()){
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost(url);
try {
HttpResponse response = httpclient.execute(httppost);
Log.v("Message", response.toString());
} catch (ClientProtocolException e) {
Log.e("Sending Message",e.getMessage().toString());
} catch (IOException e) {
Log.e("Sending Message",e.getMessage().toString());
}
}
}
}
public boolean isOnline(){
ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo netInfo = cm.getActiveNetworkInfo();
boolean isconnected;
if (netInfo==null || !netInfo.isConnected())
isconnected=false;
else
isconnected=true;
Log.v("isOnliNe",isconnected+"");
return isconnected;
}
}
}Stack Overflow用户
发布于 2012-04-19 13:46:06
使用线程和处理程序
Handler alarmCheckHandler = new Handler() {
@Override
public void handleMessage(Message msg) {
super.handleMessage(msg);
System.out.println("getting message from alarm thread");
//Call your function for ping
};
Thread alarmCheckThread = new Thread() {
public void run() {
int i = 0;
synchronized (this) {
while (checkflag) {
i++;
try {
sleep(1000);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
if (i == 600) {
alarmCheckHandler.sendMessage(alarmCheckHandler
.obtainMessage());
i = 0;
}
}
System.out.println("End of unlimited while loop reched");
}
}
};对于开始呼叫
alarmCheckThread.start();用于停止呼叫
alarmCheckThread.interrupt();页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/10221996
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