Android : A/libc: Fatal signal 11 (SIGSEGV), 代码 1，tid 18372 中的故障地址 0x8

Question

我正在使用 mapbox sdk 测试应用程序，而不是 mapbox 的位置引擎提供程序，我使用此链接创建了一个名为“GoogleLocationEngine”的类，以跟踪用户位置(Google API): https://github.com/mapbox/mapbox-android-demo/issues/449

但是应用程序给我这个错误(通常是在后台时):

A/libc: Fatal signal 11 (SIGSEGV), code 1, fault addr 0x8 in tid 18372

尽管当我使用 mapbox sdk 时:

LocationEngineProvider(context).obtainBestLocationEngineAvailable() 

方法，还是报错，不知道怎么追踪，请问如何解决？我的设备是 SAMSUNG Galaxy Note 4 (SM-N900C)这是我的 MainActivity.java :

import android.location.Location;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.widget.Toast;

import com.google.android.gms.location.LocationCallback;
import com.google.android.gms.location.LocationResult;
import com.mapbox.android.core.location.LocationEngine;
import com.mapbox.android.core.location.LocationEngineListener;
import com.mapbox.android.core.location.LocationEnginePriority;
import com.mapbox.android.core.permissions.PermissionsListener;
import com.mapbox.android.core.permissions.PermissionsManager;
import com.mapbox.mapboxsdk.Mapbox;
import com.mapbox.mapboxsdk.camera.CameraUpdateFactory;
import com.mapbox.mapboxsdk.geometry.LatLng;
import com.mapbox.mapboxsdk.maps.MapView;
import com.mapbox.mapboxsdk.maps.MapboxMap;
import com.mapbox.mapboxsdk.plugins.locationlayer.LocationLayerPlugin;
import com.mapbox.mapboxsdk.plugins.locationlayer.modes.CameraMode;
import com.mapbox.mapboxsdk.plugins.locationlayer.modes.RenderMode;

import java.util.List;

public class MainActivity extends AppCompatActivity implements
    LocationEngineListener,
    PermissionsListener{

private MapView mapView;
private MapboxMap map;
private PermissionsManager permissionsManager;
private LocationEngine locationEngine;
private Location originLocation;


@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    Mapbox.getInstance(this, getString(R.string.access_token));
    setContentView(R.layout.activity_main);
    mapView = findViewById(R.id.mapView);
    mapView.onCreate(savedInstanceState);
    mapView.getMapAsync(mapboxMap -> {
        map = mapboxMap;
        enableLocation();
    });

}

private void enableLocation(){

    if(PermissionsManager.areLocationPermissionsGranted(this)){

        initializeLocationEngine();
        initializeLocationLayer();

    } else {
        permissionsManager = new PermissionsManager(this);
        permissionsManager.requestLocationPermissions(this);
    }
}

@SuppressWarnings("MissingPermission")
private void initializeLocationEngine(){
    locationEngine = GoogleLocationEngine.getLocationEngine(this);
    locationEngine.setPriority(LocationEnginePriority.HIGH_ACCURACY);
    locationEngine.activate();

    Location lastLocation = locationEngine.getLastLocation();

    if(lastLocation != null){
        originLocation = lastLocation;
        setCameraPosition(lastLocation);
    } else {
        locationEngine.addLocationEngineListener(this);
    }
}

@SuppressWarnings("MissingPermission")
private void initializeLocationLayer(){
    LocationLayerPlugin locationLayerPlugin = new LocationLayerPlugin(mapView, map, locationEngine);
    locationLayerPlugin.setLocationLayerEnabled(true);
    locationLayerPlugin.setCameraMode(CameraMode.TRACKING);
    locationLayerPlugin.setRenderMode(RenderMode.NORMAL);


}

private void setCameraPosition(Location location){
    map.animateCamera(CameraUpdateFactory.newLatLngZoom(new LatLng(location.getLatitude() , location.getLongitude()) , 13.0));
}

@SuppressWarnings("MissingPermission")
@Override
public void onConnected() {
    Log.d("onConnected" , "is Connected");
    locationEngine.requestLocationUpdates();
}

@Override
public void onLocationChanged(Location location) {
    if(location != null){
        originLocation = location;
        setCameraPosition(location);
    } else
        Toast.makeText(this, "Location is null", Toast.LENGTH_SHORT).show();
}

@Override
public void onExplanationNeeded(List<String> permissionsToExplain) {
    //present a toast or a dialog
    Toast.makeText(this, permissionsToExplain.get(0) , Toast.LENGTH_SHORT).show();
}

@Override
public void onPermissionResult(boolean granted) {
    if(granted){
        enableLocation();
    }
}

@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
    permissionsManager.onRequestPermissionsResult(requestCode , permissions , grantResults);
}

@Override
public void onStart() {
    super.onStart();
    mapView.onStart();
}

@Override
public void onResume() {
    super.onResume();
    mapView.onResume();
}

@Override
public void onPause() {
    super.onPause();
    mapView.onPause();
}

@Override
public void onStop() {
    super.onStop();
    mapView.onStop();
}

@Override
public void onLowMemory() {
    super.onLowMemory();
    mapView.onLowMemory();
}

@Override
protected void onDestroy() {
    super.onDestroy();
    mapView.onDestroy();
}

@Override
protected void onSaveInstanceState(Bundle outState) {
    super.onSaveInstanceState(outState);
    mapView.onSaveInstanceState(outState);
    }

}

更新:最近我意识到这个方法

locationEngine = new LocationEngineProvider(this).obtainBestLocationEngineAvailable();

无效!我在想这个方法对我有用，但是当我评论它并再次测试我的应用程序时它没有显示我的位置，当我使用我的 GoogleLocationEngine 类时它有效但仍然存在相同的错误。亲爱的 friend 们有什么想法吗？

Answer 1

问题已解决!基于这一段:

在各自的 Activity 方法中包含位置层 onStart() 和 onStop() 生命周期事件很重要。这可以防止发生内存泄漏并减少电池消耗。该插件支持新的 LifecycleObserver API，通过将插件作为生命周期观察器添加到您的 Activity 中，您将无需手动处理生命周期。

来源链接:mapbox_locationLayer

还有这个mapboxDemo_LocationLayerPluginActivity.java (GitHub) ，我应该在我的函数中使用这些方法:

    locationPlugin = new LocationLayerPlugin(mapView, mapboxMap, locationEngine);
    locationPlugin.setLocationLayerEnabled(true);
    locationPlugin.setCameraMode(CameraMode.TRACKING);
    locationPlugin.setRenderMode(RenderMode.COMPASS);
    Lifecycle lifecycle = getLifecycle();
    lifecycle.addObserver(locationPlugin);

在我的 onStart() 中:

@Override
public void onStart() {
    super.onStart();
    mapView.onStart();
    if(locationEngine != null){
        locationEngine.requestLocationUpdates();
        locationEngine.addLocationEngineListener(this);
    }
}

也在我的 onStop() 中:

@Override
public void onStop() {
    super.onStop();
    mapView.onStop();
    if(locationEngine != null){
        locationEngine.removeLocationEngineListener(this);
        locationEngine.removeLocationUpdates();
    }
}

然后致命信号错误现在消失了。

我必须说谢谢 mapbox 支持团队支持我并解决了这个问题。