小编boj*_*jan的帖子

在清单文件中,我添加了粗略和精细的权限,当我在使用Android 6的设备上运行时,没有任何反应!我尝试了一切,但无法获得位置更新......

我究竟做错了什么？

public class MainActivity extends AppCompatActivity implements LocationListener {

    LocationManager locationManager;
    String provider;

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

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

        provider = locationManager.getBestProvider(new Criteria(), false);

        if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
            // TODO: Consider calling
            //    ActivityCompat#requestPermissions
            // here to request the missing permissions, and then overriding
            //   public void onRequestPermissionsResult(int requestCode, String[] permissions,
            //                                          int[] grantResults)
            // to handle the case where the user grants the permission. …

当我使用InstantSearch Android时,会出现内存泄漏.

请参阅以下MainActivity泄漏内存... hprof显示它是一个问题com.algolia.instantsearch.ui.views.Hits.什么人知道如何在被摧毁时摧毁那个视图Activity？

public class MainActivity extends AppCompatActivity {
    private Searcher searcher;
    InstantSearch helper;

    Hits hits;

    LinearLayout activity_main;

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

        hits= (Hits) findViewById(R.id.hits);
        activity_main= (LinearLayout) findViewById(R.id.activity_main);

        searcher = Searcher.create("app_id","secret_key","Items");
        helper = new InstantSearch(this, searcher);
        helper.search();
    }

    @Override
    protected void onDestroy() {
        searcher=null;

        helper=null;
        hits.clear();

        hits.removeAllViewsInLayout();
        hits.removeAllViews();
        hits.destroyDrawingCache();
        hits.setBackground(null);
        hits.setBackgroundResource(0);
        hits=null;

        activity_main.removeAllViewsInLayout();
        activity_main.removeAllViews();
        activity_main.destroyDrawingCache();
        activity_main.setBackground(null);
        activity_main.setBackgroundResource(0);
        activity_main=null;
        Log.i("AppInfo","Destroy");
        super.onDestroy();
    }
}

这是我的activity_main.xml:

<LinearLayout
android:id="@+id/activity_main"
xmlns:android="http://schemas.android.com/apk/res/android" …