Android动态申请文件读写,android 应用内动态申请读写权限

用的框架：

/**

* 动态权限

* https://github.com/googlesamples/easypermissions

* */

implementation 'pub.devrel:easypermissions:1.3.0'

业务流程：

调用权限服务之前，获取当前权限状态，如果没有则申请权限

获取到了权限则调用服务，否则禁止调用(闪退)

来个调用相机的例子：

添加imageview点击事件,点击调用相册

imageView.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View v) {

methodRequiresCameraPermission();

}

});

调用相机的代码如下：

// 相机权限

@AfterPermissionGranted(KapPermissionUtils.RC_CAMERA_AND_LOCATION)

private void methodRequiresCameraPermission(){

String[] perms = KapPermissionUtils.KapPermissionCamera();

if (EasyPermissions.hasPermissions(getContext(), perms)) {

pushImageActivity();// 按业务自己跳转

} else {

EasyPermissions.requestPermissions(this, alert_permission_camera,

KapPermissionUtils.RC_CAMERA_AND_LOCATION, perms);

}

}

系统权限回调交托

/** 权限申请 */

@Override

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

super.onRequestPermissionsResult(requestCode, permissions, grantResults);

// 权限申请

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

}

自己写的一个配置类

/**

* Created by jing on 2017/7/4.

* 动态权限申请

*/

public class KapPermissionUtils {

/** 相机相册 */

public static final int RC_CAMERA_AND_LOCATION = 1001;

public static String[] KapPermissionCamera(){

String[] perms;

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

return perms;

}

/** 通讯录 */

public static final int RC_CONTACTS_PERM= 1003;

public static String[] KapPermissionContacts(){

String[] perms;

perms = new String[]{Manifest.permission.READ_CONTACTS};

return perms;

}

public static final int RC_SD_PERM = 1002;//

}