Runtime Permission in Pre-Marshmallow

As we have already discussed about Requesting Runtime Permission in Marshmallow, now what if we want to give suuport for Runtime Permission in Pre-Marshmallow devices.

And the solution is : Support Library

If we want to use checkSelfPermission() we need to use minSdkVersion 23 but what if we want to give support in both Marshmallow and pre-marshmallow devices. There are small changes we need to do with those methods we are using for Marshmallow.

– ContextCompat.checkSelfPermission()

No matter application is run on Marshmallow or not. This function will correctly return PERMISSION_GRANTED if the permission is granted. Otherwise PERMISSION_DENIED will be returned.

– ActivityCompat.requestPermissions()

If this function is called on pre-Marshmallow, OnRequestPermissionsResultCallback will be suddenly called with correct PERMISSION_GRANTED or PERMISSION_DENIED result.

-ActivityCompat.shouldShowRequestPermissionRationale()

it will always return false, if called on pre-marshmallow.

Here i am sharing demo code, please take a look at that.

int hasReadPermission = ContextCompat.checkSelfPermission(MainActivity.this,
        Manifest.permission.READ_EXTERNAL_STORAGE);
if (hasReadPermission != PackageManager.PERMISSION_GRANTED) {
    showCustomDialog("You need to allow access to External Storage", new DialogInterface.OnClickListener() {
        @Override
        public void onClick(DialogInterface dialog, int which) {
            ActivityCompat.requestPermissions(MainActivity.this,
                    new String[]{Manifest.permission.READ_EXTERNAL_STORAGE}, 12);
        }
    });
}

int hasReadPermission = ContextCompat.checkSelfPermission(MainActivity.this,

Manifest.permission.READ_EXTERNAL_STORAGE);

if (hasReadPermission != PackageManager.PERMISSION_GRANTED) {

showCustomDialog("You need to allow access to External Storage", new DialogInterface.OnClickListener() {

@Override

public void onClick(DialogInterface dialog, int which) {

ActivityCompat.requestPermissions(MainActivity.this,

new String[]{Manifest.permission.READ_EXTERNAL_STORAGE}, 12);

}

});

}

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Ravi Rupareliya

He is author of Android Gig. He loves to explore new technologies and have worked on Android, React Native, Action on Google and Flutter.

Runtime Permission in Pre-Marshmallow

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