5
我們一直在爲android平臺開發服務。即使在鎖定設備後，是否可以在android平臺上持續運行服務？
在我們的服務中，我們需要每隔一分鐘後將設備的GPS數據（緯度和長度）發送到某個外部REST服務。
設備鎖定後，它運行良好近15分鐘。但之後它不會發送任何數據。
解鎖設備後，它再次開始通過REST服務發送數據。
到目前爲止我的代碼
public class MainActivity extends AppCompatActivity {
private PendingIntent pendingIntent;
private PowerManager.WakeLock wakeLock;
public static final String USER_NAME = "USERNAME";
String username;
String password;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Intent alarm = new Intent(this, AlarmReceiver.class);
boolean alarmRunning = (PendingIntent.getBroadcast(this, 0, alarm, PendingIntent.FLAG_NO_CREATE) != null);
if(alarmRunning == false) {
PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0, alarm, 0);
AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
alarmManager.setRepeating(AlarmManager.ELAPSED_REALTIME_WAKEUP, SystemClock.elapsedRealtime(), 30000, pendingIntent);
}
PowerManager mgr = (PowerManager)this.getSystemService(Context.POWER_SERVICE);
wakeLock = mgr.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK,"MyWakeLock");
wakeLock.acquire();
}
public class BackgroundService extends Service {
private boolean isRunning;
private Context context;
private Thread backgroundThread;
@Override
public IBinder onBind(Intent intent) {
return null;
}
@Override
public void onCreate() {
this.context = this;
this.isRunning = false;
this.backgroundThread = new Thread(myTask);
}
private Runnable myTask = new Runnable() {
public void run() {
// Do something here
login("admin","admin");
stopSelf();
}
};
@Override
public void onDestroy() {
this.isRunning = false;
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
if(!this.isRunning) {
this.isRunning = true;
this.backgroundThread.start();
}
return START_STICKY;
}
private void login(final String strLatitude, final String strLongitude) {
class LoginAsync extends AsyncTask<String, Void, String> {
String charset = "UTF-8";
HttpURLConnection conn;
DataOutputStream wr;
StringBuilder result = new StringBuilder();
URL urlObj;
JSONObject jObj = null;
StringBuilder sbParams;
String paramsString;
@Override
protected void onPreExecute() {
super.onPreExecute();
// loadingDialog = ProgressDialog.show(MainActivity.this, "Please wait", "Loading...");
}
@Override
protected String doInBackground(String... params) {
String uname = params[0];
String pass = params[1];
sbParams = new StringBuilder();
try {
sbParams.append("name").append("=")
.append(URLEncoder.encode(uname, charset));
sbParams.append("&");
sbParams.append("password").append("=")
.append(URLEncoder.encode(pass, charset));
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
try {
String url="http://192.168.0.122:1234/YegoService.svc/AddVehicleMovement";
URL object=new URL(url);
HttpURLConnection con = (HttpURLConnection) object.openConnection();
con.setDoOutput(true);
con.setDoInput(true);
con.setRequestProperty("Content-Type", "application/json");
con.setRequestProperty("Accept", "application/json");
con.setRequestMethod("POST");
JSONObject parent = new JSONObject();
parent.put("strValidatorID","111");
parent.put("TXT_LAT", "28.25252525");
parent.put("TXT_LONG", "77.7777777");
parent.put("DAT_DATE", "");
con.connect();
OutputStreamWriter wr = new OutputStreamWriter(con.getOutputStream());
wr.write(parent.toString());
wr.flush();
wr.close();
InputStream input = con.getInputStream();
BufferedReader reader = new BufferedReader(new InputStreamReader(input));
String line;
while ((line = reader.readLine()) != null) {
result.append(line);
}
con.disconnect();
} catch (IOException e) {
e.printStackTrace();
}
catch (Exception ex) {
ex.printStackTrace();
}
return result.toString();
}
@Override
protected void onPostExecute(String result){
String s = result.trim();
}
}
LoginAsync la = new LoginAsync();
la.execute("admin", "admin");
}
}
public class AlarmReceiver extends BroadcastReceiver {
String strLatitude;
String strLongitude;
@Override
public void onReceive(Context context, Intent intent) {
Intent background = new Intent(context, BackgroundService.class);
context.startService(background);
}
}
怎麼辦？
你有不同的設備上進行測試？ o/p是否一樣？ –
在另一臺設備上測試，結果相同!!! –
你使用部分喚醒鎖嗎？ – ozo