Question

我正在开发一个简单的＃34; Check-In＆＃34;应用程序和我面临一些麻烦。

当我点击ImageButton获取位置时，我的Logcat开始响应：

GC_EXPLICIT freed 365K, 18% free 14183K/17256K, paused 2ms+4ms, total 24ms 
to [...]
GC_EXPLICIT freed 137K, 1% free 17871K/18044K, paused 2ms+16ms, total 63ms

并且应用冻结了。我减少了将RelativeLayout更改为LinearLayout的延迟，但问题仍然存在。 * PS：在Moto G上运行（摩托罗拉XT1033）代码：

// MyLocationListener

public class MyLocationListener implements LocationListener{

private static final long MINIMUM_DISTANCE_CHANGE_FOR_UPDATES = 0; // in Meters
private static final long MINIMUM_TIME_BETWEEN_UPDATES = 5000; // in Milliseconds
private LocationManager locationManager;

public MyLocationListener(LocationManager locationManager) {
    this.locationManager = locationManager;
}

public void onLocationChanged(Location location) {
    locationManager.requestLocationUpdates(
            LocationManager.GPS_PROVIDER,
            MINIMUM_TIME_BETWEEN_UPDATES,
            MINIMUM_DISTANCE_CHANGE_FOR_UPDATES,
            new MyLocationListener(locationManager)
    );

}

public void onProviderDisabled(String s) {


}

public void onProviderEnabled(String s) {


}

public void onStatusChanged(String s, int i, Bundle b) {


}

}

// CheckInActivity

public class CheckInActivity extends ActionBarActivity{
private SharedPreferences sharedPref;
private LocationManager locationManager;

@TargetApi(Build.VERSION_CODES.HONEYCOMB)
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_checkin);
    ActionBar actionBar = getSupportActionBar();
    actionBar.hide();
    sharedPref = this.getSharedPreferences("user", Context.MODE_PRIVATE);
    String truck = sharedPref.getString("name", "");

    locationManager = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);

    if (locationManager.getProvider(LocationManager.GPS_PROVIDER) != null) {
        locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, new MyLocationListener(locationManager));
    } else if (locationManager.getProvider(LocationManager.NETWORK_PROVIDER) != null) {
        locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, new MyLocationListener(locationManager));
    } else {
        locationManager.requestLocationUpdates(LocationManager.PASSIVE_PROVIDER, 0, 0, new MyLocationListener(locationManager));
    }

    EditText folk = (EditText)findViewById(R.id.folkName);
    folk.setText(truck);
}

public void setLocation(View view) {
    final ProgressDialog progressDialog = new ProgressDialog(CheckInActivity.this);
    final EditText addressInput = (EditText)findViewById(R.id.addressInput);
    progressDialog.setMessage("Obtendo endereço atual…");
    progressDialog.show();

    new AsyncTask<Void, Void, Location>(){

        @SuppressLint("NewApi")
        @TargetApi(Build.VERSION_CODES.GINGERBREAD)
        @Override
        protected Location doInBackground(Void... voids) {
            android.location.Location location = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);

            if ( location == null )
                location = locationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);

            if ( location == null )
                location = locationManager.getLastKnownLocation(LocationManager.PASSIVE_PROVIDER);


            System.out.println(location);

            if(location != null){
                double x = location.getLatitude();
                double y = location.getLongitude();


                final Location finalLocation = location;
                runOnUiThread(new Runnable() {
                    @Override
                    public void run() {
                        double x = finalLocation.getLatitude();
                        double y = finalLocation.getLongitude();
                        String x_val = String.valueOf(x);
                        TextView lat = (TextView)findViewById(R.id.lat);
                        lat.setText(x_val);

                        String y_val = String.valueOf(y);
                        TextView lon = (TextView)findViewById(R.id.lon);
                        lon.setText(y_val);
                    }
                });
                System.out.println(x);
                System.out.println(y);

                try{
                    Geocoder geocoder = new Geocoder(CheckInActivity.this, Locale.getDefault());
                    List<Address> addresses = geocoder.getFromLocation(x, y, 1);
                    final StringBuilder str = new StringBuilder();

                    if (Geocoder.isPresent()) {
                        Address returnAddress = addresses.get(0);

                        String cidade = returnAddress.getAdminArea();
                        String endereco = returnAddress.getAddressLine(0);
                        str.append(endereco).append(" - ").append(cidade);


                        progressDialog.dismiss();
                        runOnUiThread(new Runnable() {
                            @Override
                            public void run() {
                                addressInput.setText(str);
                            }
                        });

                    }else{
                        Toast.makeText(CheckInActivity.this,
                                "geocoder not present", Toast.LENGTH_SHORT).show();
                    }


                } catch (IOException e) {
                    e.printStackTrace();
                }

            }
            return location;
        }
    }.execute();
}
}

Answer 1

我认为问题在于：

public void onLocationChanged(Location location) {
    locationManager.requestLocationUpdates(
            LocationManager.GPS_PROVIDER,
            MINIMUM_TIME_BETWEEN_UPDATES,
            MINIMUM_DISTANCE_CHANGE_FOR_UPDATES,
            new MyLocationListener(locationManager)
    );
}

每次获得位置更新时，您都会注册一个新的位置监听器，因此下次您将获得两个位置更新并注册另外两个位置监听器，然后是四个，然后是8，那么系统将停止运行。

Android位置应用冻结

1 个答案: