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Android应用项目每次最开始都要进行权限申请，贴一下权限申请的示例代码，方便后续Ctrl C+V使用

1.AndroidManifest.xml 配置要申请的权限

<uses-permission android:name="android.permission.READ_CONTACTS" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

2.示例代码：

可以封装成一个权限类供其他地方调用，懒得写了，代码先散装着贴吧。

    private static final int REQUEST_PERMISSION_CODE = 101010;  //默认请求权限的requestCode为1//需要申请的权限数组private String[] requestPermissionArray = new String[]{Manifest.permission.READ_CONTACTS,Manifest.permission.READ_EXTERNAL_STORAGE,Manifest.permission.WRITE_EXTERNAL_STORAGE};public void checkPermission(Context context, String[] permissions) {//存放permissions中当前未被授予的权限List<String> permissionList = new ArrayList<>();//遍历权限数组，检测所需权限是否已被授予，若该权限尚未授予，添加到permissionList中for (String permission : permissions) {if (ContextCompat.checkSelfPermission(context, permission) != PackageManager.PERMISSION_GRANTED) {Log.e(TAG, "checkSelfPermission:" + permission);if (!permissionList.contains(permission)) {permissionList.add(permission);Log.e(TAG, "permissionList add " + permission);}}}if (!permissionList.isEmpty()) {//有权限尚未授予，去授予权限ActivityCompat.requestPermissions((Activity) context,permissionList.toArray(new String[permissionList.size()]),REQUEST_PERMISSION_CODE);} else {//权限都被授予了Log.d(TAG, "权限都授予了");//doSomething();}}/*** 申请权限结果返回** 通常checkPermission()权限都能申请下来，返回结果不处理也没问题** @param requestCode  请求码* @param permissions  所有申请的权限集合* @param grantResults 权限申请的结果*/@Overridepublic void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {super.onRequestPermissionsResult(requestCode, permissions, grantResults);Log.i(TAG, "onRequestPermissionsResult");switch (requestCode) {case REQUEST_PERMISSION_CODE:if (grantResults.length > 0) { //有权限申请//存储被用户拒绝的权限List<String> deniedPermissionList = new ArrayList<>();//有权限被拒绝，分类出被拒绝的权限for (int i = 0; i < grantResults.length; i++) {String permission = permissions[i];int grantResult = grantResults[i];if (grantResult != PackageManager.PERMISSION_GRANTED) {if (!deniedPermissionList.contains(permission)) {deniedPermissionList.add(permission);}}}if (deniedPermissionList.isEmpty()) {//没有被拒绝的权限Log.d(TAG, "权限都授予了");//doSomething();} else {//有被拒绝的权限Log.e(TAG, "有权限被拒绝了");//继续申请}}break;}}