Android 权限申请java/kotlin

java

　　private static List<String> sPermissions = new ArrayList<String>(){};
　　private static int MAX_NUMBER_REQUEST_PERMISSIONS = 2;
　　private static int REQUEST_CODE_PERMISSIONS = 101;
　　private int permissionRequestCount = 0;
　　private boolean hasPermissions = false;

　　/**
     * 权限申请
     */
    private void requestPermissionsIfNecessary() {
        hasPermissions = checkAllPermissions();
        if (!hasPermissions) {
            if (permissionRequestCount < MAX_NUMBER_REQUEST_PERMISSIONS) {
                permissionRequestCount += 1;
                ActivityCompat.requestPermissions(this, sPermissions.toArray(new String[0]), REQUEST_CODE_PERMISSIONS);
            } else {

            }
        }
    }

    /**
     * 权限回调 onActivityResult已经废弃
     */
    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        if (requestCode == REQUEST_CODE_PERMISSIONS) {
            requestPermissionsIfNecessary();
        }
    }

    /**
     *  权限检查
     * @return 权限是否申请
     */
    private Boolean checkAllPermissions() {
        boolean hasPermissions = true;
        for (String permission : sPermissions) {
            hasPermissions = hasPermissions & (ContextCompat.checkSelfPermission(this, permission) == PackageManager.PERMISSION_GRANTED);
        }
        return hasPermissions;
    }

kotlin 

第二种适合单一权限申请

多权限请求请ActivityResultContracts.RequestPermission()改为 ActivityResultContracts.RequestMultiplePermissions

//注册权限回调，它处理用户对系统权限对话框的响应。 保存返回值，ActivityResultLauncher 的一个实例。
    // 您可以使用此代码段中所示的 val，也可以在 onAttach() 或 onCreate() 方法中使用 lateinit var。
    private val requestPermissionLauncher =
        registerForActivityResult(
            ActivityResultContracts.RequestPermission()
        ) { isGranted: Boolean ->
            if (isGranted) {
                // 已授予权限
            } else {
                // 权限请求被拒绝。
            }
        }

requestPermissionLauncher.launch(Manifest.permission.RECORD_AUDIO)

 

//手动设置权限 
fun gotoAppDetailIntent(activity: Activity) {
        val intent = Intent()
        intent.action = Settings.ACTION_APPLICATION_DETAILS_SETTINGS
        intent.data = Uri.parse("package:" + activity.packageName)
        activity.startActivity(intent)
    }