【安卓笔记】android申请储存权限 读写文件

首先在AndroidManifest.xml中注册读取USB存储设备中的内容

<!-- 读取您的USB存储设备中的内容 --><uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/><!-- 修改或删除您的USB存储设备中的内容 --><uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

检查权限

private void checkPermission() {try {String[] PERMISSIONS_STORAGE = {Manifest.permission.READ_EXTERNAL_STORAGE, Manifest.permission.WRITE_EXTERNAL_STORAGE};int permission = ActivityCompat.checkSelfPermission(this, "android.permission.WRITE_EXTERNAL_STORAGE");if (permission != PackageManager.PERMISSION_GRANTED) {ActivityCompat.requestPermissions(this, PERMISSIONS_STORAGE, REQUEST_CODE);} else {}} catch (Exception e) {e.printStackTrace();}}

调用方法

checkPermission();

返回后生命周期的回调，可判断是否申请成功

private static final int REQUEST_CODE = 1;@Overridepublic void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {super.onRequestPermissionsResult(requestCode, permissions, grantResults);if (requestCode == REQUEST_CODE) {if (grantResults[0] == PackageManager.PERMISSION_DENIED) {//拒绝} else {}}}