申请动态权限(文件存储，录音，录像和相机)

1、首先在要申请权限的界面定义全局变量的权限数组和请求状态码；

//读写权限
    private static String[] PERMISSIONS_STORAGE = {
            Manifest.permission.CAMERA,
            Manifest.permission.WRITE_EXTERNAL_STORAGE
            ,Manifest.permission.RECORD_AUDIO};
    //请求状态码
    private static int REQUEST_PERMISSION_CODE = 1;

2、在onCreate()中判断需要申请的权限；

if (Build.VERSION.SDK_INT > Build.VERSION_CODES.LOLLIPOP) {
            if (ActivityCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
                ActivityCompat.requestPermissions(this, PERMISSIONS_STORAGE, REQUEST_PERMISSION_CODE);
            }
            if (ActivityCompat.checkSelfPermission(this, Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED) {
                ActivityCompat.requestPermissions(this, PERMISSIONS_STORAGE, REQUEST_PERMISSION_CODE);
            }
            if (ActivityCompat.checkSelfPermission(this, Manifest.permission.RECORD_AUDIO) != PackageManager.PERMISSION_GRANTED) {
                ActivityCompat.requestPermissions(this, PERMISSIONS_STORAGE, REQUEST_PERMISSION_CODE);
            }
        }

3、在界面进行方法回调；

@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
    if (requestCode == REQUEST_PERMISSION_CODE) {
       for (int i = 0; i < permissions.length; i++) {
         Log.i("MainActivity", "申请的权限为：" + permissions[i] + ",申请结果：" + 
         grantResults[i]);
       }
     }
}

4、记得在清单文件中添加权限；

然后运行之后到这个界面就会弹出申请权限的对话框，大功告成！