Wie bekomme ich Koordinaten von einem GPS-Dienst in eine Textdatei?

Question

Ich bin neu in der Android-Programmierung. Der Quellcode, den ich eingefügt habe, ist nicht von mir selbst, sondern von einem Github-Projekt. Ich möchte die Koordinaten eines GPS-Dienstes in einer Textdatei speichern. Weiß jemand, wie man das macht?

public class MainActivity extends AppCompatActivity { 

private Button btn_start, btn_stop; 
public Button save; 

private BroadcastReceiver broadcastReceiver; 
int delay = 1000; // delay for 1 sec. 
int period = 10000; // repeat every 10 sec. 
Timer timer = new Timer(); 
public EditText editText; 
public TextView textView; 

public String path = Environment.getExternalStorageDirectory().getAbsolutePath() + "/aaTutorial"; 

@Override 
protected void onResume() { 
    super.onResume(); 
    if(broadcastReceiver == null){ 
     broadcastReceiver = new BroadcastReceiver() { 
      @Override 
      public void onReceive(Context context, Intent intent) { 

       textView.append("\n" +intent.getExtras().get("coordinates")); 

      } 
     }; 
    } 
    registerReceiver(broadcastReceiver,new IntentFilter("location_update")); 
} 

@Override 
protected void onDestroy() { 
    super.onDestroy(); 
    if(broadcastReceiver != null){ 
     unregisterReceiver(broadcastReceiver); 
    } 
} 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 

    btn_start = (Button) findViewById(R.id.button); 
    btn_stop = (Button) findViewById(R.id.button2); 
    textView = (TextView) findViewById(R.id.textView); 
    save = (Button) findViewById(R.id.save); 
    File dir = new File(path); 
    dir.mkdirs(); 

    if(!runtime_permissions()) 
     enable_buttons(); 

} 

private void enable_buttons() { 

    btn_start.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View view) { 
      Intent i =new Intent(getApplicationContext(),GPS_Service.class); 
      startService(i); 
     } 
    }); 

    btn_stop.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View view) { 

      Intent i = new Intent(getApplicationContext(),GPS_Service.class); 
      stopService(i); 

     } 
    }); 

} 

private boolean runtime_permissions() { 
    if(Build.VERSION.SDK_INT >= 23 && ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED){ 

     requestPermissions(new String[]{Manifest.permission.ACCESS_FINE_LOCATION, Manifest.permission.ACCESS_COARSE_LOCATION},100); 

     return true; 
    } 
    return false; 
} 


@Override 
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) { 
    super.onRequestPermissionsResult(requestCode, permissions, grantResults); 
    if(requestCode == 100){ 
     if(grantResults[0] == PackageManager.PERMISSION_GRANTED && grantResults[1] == PackageManager.PERMISSION_GRANTED){ 
      enable_buttons(); 
     }else { 
      runtime_permissions(); 
     } 
    } 
} 
} 

Answer 1

Verwenden Sie eine BufferedWriter und BufferedWriter.write() Methode in Ihrem BroadcastReceiver.onReceive() nennen.

Ihren aktuellen Code funktioniert Unter der Annahme, hier können Sie die Änderungen überprüfen benötigt:

BufferedWriter writer; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 

    writer = new BufferedWriter(new FileWriter("mnt/sdcard/gps.txt")); 
    //... 

} 

@Override 
protected void onResume() { 
    super.onResume(); 
    if(broadcastReceiver == null){ 
     broadcastReceiver = new BroadcastReceiver() { 
      @Override 
      public void onReceive(Context context, Intent intent) { 

       textView.append("\n" +intent.getExtras().get("coordinates")); 

       writer.write(intent.getExtras().get("coordinates")); 
       writer.newLine(); 

      } 
     }; 
    } 
    registerReceiver(broadcastReceiver,new IntentFilter("location_update")); 
} 

protected void onDestroy() { 
    super.onDestroy(); 
    writer.close(); 
    if(broadcastReceiver != null){ 
     unregisterReceiver(broadcastReceiver); 
    } 
}