通话需要获得用户在尝试获取位置时可能会被拒绝的权限

时间:2017-03-01 14:46:12

标签: java android android-studio geolocation

我查看了其他问题,但无法找到答案。 无论如何,我试图获得设备的位置,它只是不会工作。我使用的是Android 5.0(API 21)。

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);
    Location location = locationManager.getLastKnownLocation(provider);
}

@Override
public void onLocationChanged(Location location) {

}

@Override
public void onStatusChanged(String provider, int status, Bundle extras) {

}

@Override
public void onProviderEnabled(String provider) {

}

@Override
public void onProviderDisabled(String provider) {

}
}

错误是在.getLastKnowLocation()中。它说我应该检查权限,但我已经将权限添加到Android清单。

uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>

当我点击红色灯泡时,会出现“添加权限检查”选项,当我点击它时,它会对此进行广告宣传:

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. See the documentation
        // for ActivityCompat#requestPermissions for more details.
        return;
    }

但是当我运行它时,它总会返回; ,就像我没有权限一样。

2 个答案:

答案 0 :(得分:1)

您需要启用运行时权限

  ActivityCompat.requestPermissions(thisActivity,
            new String[]{Manifest.permission.ACCESS_COARSE_LOCATION,Manifest.permission.ACCESS_FINE_LOCATION},1200);

答案 1 :(得分:1)

如果您只希望自己的应用程序达到API级别21,则可以在模块级别targetSdkVersion 21文件中设置build.gradle,这将使您面临的错误消失。

如果您希望开始定位API级别23或更高级别,则除了在清单中声明权限外,还需要在运行时请求权限。