Android开源项目-Easypermissions

2019-11-06 09:42:06

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Easypermissions简化了Android M的运行时权限的申请、结果处理、判断等步骤。

1 相关文档

官方文档：

https://github.com/googlesamples/easypermissions

运行时权限官方文档解释：

https://developer.android.com/training/permissions/requesting.html

2 为什么使用Easypermissions

Android M对权限系统进行了改变。Android M之前所需权限只需要在AndroidManifest中申请即可。但更新Android M系统后，部分“Dangerous Permission”需要在运行时询问申请。

Normal and Dangerous Permissions解释：https://developer.android.com/guide/topics/security/permissions.html#normal-dangerous

如下图所示：

运行时权限申请

代码中如果需要申请运行时权限步骤：

1 检查运行时权限

ContextCompat.checkSelfPermission(thisActivity, Manifest.permission.READ_CONTACTS) != PackageManager.PERMISSION_GRANTED

2 申请权限

ActivityCompat.requestPermissions(thisActivity, new String[]{Manifest.permission.READ_CONTACTS}, MY_PERMISSIONS_REQUEST_READ_CONTACTS);

3 接收权限处理结果

@Overridepublic void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) { switch (requestCode) { case MY_PERMISSIONS_REQUEST_READ_CONTACTS: { // If request is cancelled, the result arrays are empty. if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) { // permission was granted, yay! Do the // contacts-related task you need to do. } else { // permission denied, boo! Disable the // functionality that depends on this permission. } return; } // other 'case' lines to check for other // permissions this app might request }}

以上即是google建议的运行时权限处理过程。代码量和处理地方还是比较繁琐的。so，Easypermissions应运而生。

3 如何使用

首先，引用库

dependencies { compile 'pub.devrel:easypermissions:0.1.9'}

同样，easypermissions处理权限分为3步。

1 检查权限

String[] perms = {Manifest.permission.CAMERA, Manifest.permission.CHANGE_WIFI_STATE};if (EasyPermissions.haspermissions(this, perms)) { //... } else { //...}

2 申请权限

EasyPermissions.requestPermissions(this, "拍照需要摄像头权限", RC_CAMERA_AND_WIFI, perms);

3 实现EasyPermissions.PermissionCallbacks接口，直接处理权限是否成功申请

@Override public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) { super.onRequestPermissionsResult(requestCode, permissions, grantResults); // Forward results to EasyPermissions EasyPermissions.onRequestPermissionsResult(requestCode, permissions, grantResults, this); } //成功 @Override public void onPermissionsGranted(int requestCode, List<String> list) { // Some permissions have been granted // ... } //失败 @Override public void onPermissionsDenied(int requestCode, List<String> list) { // Some permissions have been denied // ... }