还记得android棉花糖上的请求权限吗

在我的活动中，我可以使用以下代码行处理android 6中的危险权限：

    ActivityCompat.requestPermissions(WriteThreadActivity.this,
            new String[]{android.Manifest.permission.READ_EXTERNAL_STORAGE,
                    android.Manifest.permission.WRITE_EXTERNAL_STORAGE}, RESULT_LOAD_IMAGE);

---

它工作正常，但是否有任何方法可以防止用户每次打开此活动时显示此弹出窗口？例如记住方法？

您不需要请求读取\u外部\u存储权限。如果您请求写入\u外部\u存储，因为它位于同一权限组中，它将自动获得访问权限。

// Here, thisActivity is the current activity
if (ContextCompat.checkSelfPermission(thisActivity,
            Manifest.permission.WRITE_EXTERNAL_STORAGE)
    != PackageManager.PERMISSION_GRANTED) {

// Should we show an explanation?
if (ActivityCompat.shouldShowRequestPermissionRationale(thisActivity,
        Manifest.permission.WRITE_EXTERNAL_STORAGE)) {

    // Show an expanation to the user *asynchronously* -- don't block
    // this thread waiting for the user's response! After the user
    // sees the explanation, try again to request the permission.

} else {

    // No explanation needed, we can request the permission.

    ActivityCompat.requestPermissions(thisActivity,
            new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE},
            MY_PERMISSIONS_REQUEST_WRITE_EXTERNAL_STORAGE);

    // MY_PERMISSIONS_REQUEST_WRITE_EXTERNAL_STORAGE is an
    // app-defined int constant. The callback method gets the
    // result of the request.
}
}else{
  // You have permission granted already, to the task
}

private boolean doesUserHavePermission()
{
    int result = context.checkCallingOrSelfPermission(Manifest.permission.WRITE_EXTERNAL_STORAGE);
    return result == PackageManager.PERMISSION_GRANTED;
}