【Android开发】EasyPermissions 请求权限

安卓6.0以后，开发应用的时候，仅在AndroidManifest.xml中申请权限已经不可以了，需要在代码中动态申请。

现在看一个google推出的机制：EasyPermissions

引入步骤：

1. 导入库文件：

dependencies {

    compile 'pub.devrel:easypermissions:1.0.1'

}

2. 实现 EasyPermissions.PermissionCallbacks

public class MainActivity extends AppCompatActivity implements EasyPermissions.PermissionCallbacks {

    String[] perms = {Manifest.permission.CAMERA, Manifest.permission.ACCESS_FINE_LOCATION};

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        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_location_rationale),

                RC_CAMERA_AND_LOCATION, perms);

        }

    }

    @Override

    public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {

        super.onRequestPermissionsResult(requestCode, permissions, grantResults);

        // 将权限的处理交给EasyPermissions

        EasyPermissions.onRequestPermissionsResult(requestCode, permissions, grantResults, this);

    }

    @Override

    public void onPermissionsGranted(int requestCode, List<String> list) {

        // Some permissions have been granted

        // ...

    }

    @Override

    public void onPermissionsDenied(int requestCode, List<String> list) {

        // Some permissions have been denied

        // ...

    }

}

流程讲解：

首先通过EasyPermissions.hasPermissions(this, perms)，查看是否已经获取了权限；

如果没有授权，则通过 EasyPermissions.requestPermissions(.....)方法请求权限；

处理请求的是onRequestPermissionsResult，它会将处理转交给EasyPermissions.onRequestPermissionsResult(.....);

获取处理结果，如果授权，则执行onPermissionsGranted，未授权，则执行onPermissionsDenied；

Git地址请见：https://github.com/googlesamples/easypermissions#installation

巴特西

【Android开发】EasyPermissions 请求权限

1. 导入库文件：

2. 实现 EasyPermissions.PermissionCallbacks

最新文章

热门文章