快速解决设置Android 23.0以上版本对SD卡的读写权限无效的问题

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

public class PermisionUtils { // Storage Permissions private static final int REQUEST_EXTERNAL_STORAGE = 1; private static String[] PERMISSIONS_STORAGE = {   Manifest.permission.READ_EXTERNAL_STORAGE,   Manifest.permission.WRITE_EXTERNAL_STORAGE}; /**  * Checks if the app has permission to write to device storage  * If the app does not has permission then the user will be prompted to  * grant permissions  *  * @param activity  */ public static void verifyStoragePermissions(Activity activity) {  // Check if we have write permission  int permission = ActivityCompat.checkSelfPermission(activity,    Manifest.permission.WRITE_EXTERNAL_STORAGE);  if (permission != PackageManager.PERMISSION_GRANTED) {   // We don't have permission so prompt the user   ActivityCompat.requestPermissions(activity, PERMISSIONS_STORAGE,     REQUEST_EXTERNAL_STORAGE);  } }}

 //检测读写权限 PermisionUtils.verifyStoragePermissions(this);