augmify / easypermissions

Simplify Android M system permissions

EasyPermissions

EasyPermissions is a wrapper library to simplify basic system permissions logic when targeting Android M or higher.

Installation

EasyPermissions is installed by adding the following dependency to your build.gradle file:

dependencies {
  compile 'pub.devrel:easypermissions:0.1.0'
}

Usage

Basic

To begin using EasyPermissions, have your Activity implement the EasyPermissions.PermissionCallbacks and override the following methods:

public class MainActivity extends AppCompatActivity
    implements EasyPermissions.PermissionCallbacks {

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

    @Override
    public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
        // Forward results to EasyPermissions
        EasyPermissions.onRequestPermissionsResult(requestCode, permissions, grantResults, this);
    }

    @Override
    public void onPermissionsGranted(List<String> list) {
        // Some permissions have been granted
        // ...
    }

    @Override
    public void onPermissionsDenied(List<String> list) {
        // Some permissions have been denied
        // ...
    }
}

Request Permissions

The example below shows how to request permissions for a method that requires both CAMERA and CHANGE_WIFI_STATE permissions. There are a few things to note:

• Using EasyPermissions#hasPermissions(...) to check if the app already has the required permissions. This method can take any number of permissions as its final argument.
• Requesting permissions with EasyPermissions#requestPermissions. This method will request the system permissions and show the rationale string provided if necessary. The request code provided should be unique to this request, and the method can take any number of permissions as its final argument.
• Use of the AfterPermissionGranted annotation. This is optional, but provided for convenience. If all of the permissions in a given request are granted, any methods annotated with the proper request code will be executed. This is to simplify the common flow of needing to run the requesting method after all of its permissions have been granted. This can also be achieved by adding logic on the onPermissionsGranted callback.

    @AfterPermissionGranted(RC_CAMERA_AND_WIFI)
    private void methodRequiresTwoPermission() {
        String[] perms = {Manifest.permission.CAMERA, Manifest.permission.CHANGE_WIFI_STATE};
        if (EasyPermissions.hasPermissions(this, perms)) {
            // Already have permission, do the thing
            // ...
        } else {
            // Do not have permissions, request them now
            EasyPermissions.requestPermissions(this, getString(R.string.camera_and_wifi_rationale),
                    RC_CAMERA_AND_WIFI, perms);
        }
    }