Android M及以上位置课程和位置精细返回权限授予true答案

【问题标题】：Android M and above location course and location fine returning permission granted trueAndroid M及以上位置课程和位置精细返回权限授予true
【发布时间】：2017-02-27 06:27:00
【问题描述】：

我正在尝试访问用户的位置，只是整理出事情的权限方面。所以我的理解是，在 23 及以上，无论清单如何，用户都必须授予权限。

所以对于旧版本，我在清单中有这样的内容：

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

对于较新的 >= 23，我在显示对话框之前进行这样的测试：

// Check for runtime location permissions
private boolean hasRunTimeLocationPermission() {
    int courseLocationPermission = ContextCompat.checkSelfPermission(getActivity(),Manifest.permission.ACCESS_COARSE_LOCATION);
    return  (courseLocationPermission == PackageManager.PERMISSION_GRANTED );
}

我理解的方式应该是第一次返回 false，但它返回的是 true。

用户是否真的必须禁用定位服务，或者它被认为是“危险的”并且必须在第一时间获得批准？

另外我正在使用一个新的模拟器 api 23，当我查看位置权限时，它说没有应用程序请求位置。

感谢您的帮助

【问题讨论】：

您是否在片段中检查这种情况？
是的，我是这样会改变它吗？
在片段的on start方法中
@MadhukarHebbar 谢谢，该应用的权限设置为开启。我以为这不是默认的？
@MadhukarHebbar 这是导致问题的原因谢谢！由于某种原因，模拟器已经开始将该权限设置为true。你知道那会发生什么吗？

标签： android android-6.0-marshmallow android-permissions

【解决方案1】：

试试这个。

// Check for runtime location permissions
private boolean hasRunTimeLocationPermission() {
    int courseLocationPermission = ContextCompat.checkSelfPermission(getActivity(), android.Manifest.permission.ACCESS_COARSE_LOCATION);
    return  (courseLocationPermission == PackageManager.PERMISSION_GRANTED );
}

【讨论】：

感谢您的回复。抱歉，这并没有改变任何东西。

【解决方案2】：

试试这个：

private boolean hasRunTimeLocationPermission() {
 if (ContextCompat.checkSelfPermission(this,
                Manifest.permission.ACCESS_FINE_LOCATION)
                != PackageManager.PERMISSION_GRANTED)
        {
            return false;
        }
 else
        {
           return true;
        }
      }

【讨论】：

【解决方案3】：

像这样检查权限：-

Check permissions like this :-

if (ActivityCompat.checkSelfPermission(MainActivity.this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
        if (ActivityCompat.shouldShowRequestPermissionRationale(MainActivity.this, Manifest.permission.ACCESS_COARSE_LOCATION)) {
            //Show Information about why you need the permission
            AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
            builder.setTitle("Need Location Permission");
            builder.setMessage("This app needs location permission.");
            builder.setPositiveButton("Grant", new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    dialog.cancel();
                    ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.ACCESS_COARSE_LOCATION}, ACCESS_COARSE_LOCATION_CONSTANT);
                }
            });
            builder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    dialog.cancel();
                }
            });
            builder.show();
        } else if (permissionStatus.getBoolean(Manifest.permission.ACCESS_COARSE_LOCATION,false)) {
            //Previously Permission Request was cancelled with 'Dont Ask Again',
            // Redirect to Settings after showing Information about why you need the permission
            AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
            builder.setTitle("Need Location Permission");
            builder.setMessage("This app needs location permission.");
            builder.setPositiveButton("Grant", new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    dialog.cancel();
                    sentToSettings = true;
                    Intent intent = new Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS);
                    Uri uri = Uri.fromParts("package", getPackageName(), null);
                    intent.setData(uri);
                    startActivityForResult(intent, REQUEST_PERMISSION_SETTING);
                    Toast.makeText(getBaseContext(), "Go to Permissions to Grant Location", Toast.LENGTH_LONG).show();
                }
            });
            builder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    dialog.cancel();
                }
            });
            builder.show();
        } else {
            //just request the permission
            ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.ACCESS_COARSE_LOCATION}, ACCESS_COARSE_LOCATION_CONSTANT);
        }

        SharedPreferences.Editor editor = permissionStatus.edit();
        editor.putBoolean(Manifest.permission.ACCESS_COARSE_LOCATION,true);
        editor.commit();


    } else {
        //You already have the permission, just go ahead.
        proceedAfterPermission();
    }

【讨论】：

【解决方案4】：

即使对于 api>23 也将其添加到 Manifest

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

然后像这样请求运行时权限：-

ActivityCompat.requestPermissions(MainActivity.this,
                new String[]{Manifest.permission.ACCESS_COARSE_LOCATION},
                1);

要处理结果，请使用：-

@Override
public void onRequestPermissionsResult(int requestCode,
                                   String permissions[], int[] grantResults) {
switch (requestCode) {
    case 1: {

      // If request is cancelled, the result arrays are empty.
      if (grantResults.length > 0
                && grantResults[0] == PackageManager.PERMISSION_GRANTED) {

            // permission was granted, yay! Do the
        } else {

            // permission denied, boo! 
            Toast.makeText(MainActivity.this, "Permission denied to read your External storage", Toast.LENGTH_SHORT).show();
        }
        return;
    }
}
}

【讨论】：