Question

这是我的Manifests摘要：

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

这是我的fragment's摘要：

@Override
    public void onMapReady(GoogleMap googleMap) {
        this.googleMap = googleMap;
        setInfoWindowAdapter();
        if (ContextCompat.checkSelfPermission(getActivity(), Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED) {
            this.googleMap.setMyLocationEnabled(true);
        } else {
            Toast.makeText(getActivity(), getString(R.string.no_permissions), Toast.LENGTH_LONG).show();
        }
    }

当我在一个Android 4.3中启动时，地图工作正常。但是，如果我从Android 6.0开始，我会收到消息（Toast）`无权限

Answer 1

如果您在Android 6+上测试您的应用，那么您的代码工作正常。您需要在Android 6+上获得用户的运行时权限。以下是如何做到这一点：

    int permissionCheck = ContextCompat.checkSelfPermission(MapActivity.this,
            Manifest.permission.ACCESS_FINE_LOCATION);
    if (permissionCheck != PackageManager.PERMISSION_GRANTED) {
        ActivityCompat.requestPermissions(MapActivity.this,
                new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, 1);
    } else {
          //permission is already granted
    }

@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String permissions[], @NonNull int[] grantResults) {
    switch (requestCode) {
        case 1: {
            if (grantResults.length > 0) {
                if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                    //granted
                } else {
                    //not granted
                }
            } else {
                //not granted
            }
        }
        default:
            super.onRequestPermissionsResult(requestCode, permissions, grantResults);
    }
}

Answer 2

首先： 尝试使用它来请求权限：

 boolean permissionGranted = ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED;
    if(permissionGranted) {
        // {Some Code}
    } else {
        ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, 200);
    }

第二： OnRequestPermissionsResultCallback的实现

...implements  ActivityCompat.OnRequestPermissionsResultCallback {

第三： 覆盖onRequestPermissionsResult方法

 @Override
    public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
        switch (requestCode) {
            case 200: {
                if(grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                    // {Some Code}
                }
            }
        }
    }

Map API v2：没有权限

2 个答案: