为什么我的应用停止显示progressdialog？

Question

我已经创建了用于从服务器接收图像的应用程序，并在我的应用程序中通过rolide在我的应用程序中使用了滑动，我的应用程序有progressdialog并显示进度当应用程序从服务器下载图像时滑动，但通常我的应用程序停止正在进行并且不像截图那样工作下面

我必须关闭应用程序并再次打开它这个问题的解决方案你可以看到我的代码如下

 RecyclerView recycler_view;
 static final String url="";
 ArrayList<Image> images;
 GalleryAdapter mAdapter;
 ProgressDialog pd;
 public static Button btn_buy;

 @Override
 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_main);

Toolbar toolbar=(Toolbar)findViewById(R.id.toolbar);
setSupportActionBar(toolbar);

recycler_view=(RecyclerView)findViewById(R.id.recycler_view);
btn_buy=(Button)findViewById(R.id.btn_buy);


pd=new ProgressDialog(this);
pd.setCancelable(false);

images=new ArrayList<>();
mAdapter=new GalleryAdapter(getApplicationContext(),images);


RecyclerView.LayoutManager mLayoutManager=new 
GridLayoutManager(getApplicationContext(),2);
recycler_view.setLayoutManager(mLayoutManager);

recycler_view.setAdapter(mAdapter);

ActivityCompat.requestPermissions(MainActivity.this,
new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE},
1);

recycler_view.addOnItemTouchListener(new 
GalleryAdapter.RecyclerTouchListener(getApplicationContext(),recycler_view, 
new GalleryAdapter.ClickListener() {
@Override
public void onClick(View view, int position) {

Bundle bundle=new Bundle();
bundle.putSerializable("images",images);
bundle.putInt("position",position);



FragmentTransaction ft=getFragmentManager().beginTransaction();

SlideshowDialogFragment newFragment=SlideshowDialogFragment.newInstance();
newFragment.setArguments(bundle);
newFragment.show(ft,"slideshow");


}

@Override
public void onLongClick(View view, int position) {

}
}));

btn_buy.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(MainActivity.this,IABactivity.class);
startActivity(intent);

}
});


fetchImages();
}

@Override
public void onRequestPermissionsResult(int requestCode,
                                     String permissions[], int[] grantResults) {
switch (requestCode) {
case 1: {

// If request is cancelled, the result arrays are empty.
if (grantResults.length > 0
&& grantResults[0] == PackageManager.PERMISSION_GRANTED) {

      // permission was granted, yay! Do the
      // contacts-related task you need to do.
    } else {

      // permission denied, boo! Disable the
      // functionality that depends on this permission.
      Toast.makeText(MainActivity.this, "دسترسی به حافظه داخلی لغو شد!!!", Toast.LENGTH_LONG).show();
    }
    return;
  }

  // other 'case' lines to check for other
  // permissions this app might request
}
}



public void fetchImages()
{

pd.setMessage("Please wait ...");
pd.show();


StringRequest req = new StringRequest(url,
  new Response.Listener<String>() {
    @Override
    public void onResponse(String response) {
      Log.d("", response.toString());
      pd.hide();

      images.clear();
      try {
        JSONObject object = new JSONObject(response);
        JSONArray dataArray = object.getJSONArray("data");

        for (int i = 0; i < dataArray.length(); i++) {
          JSONObject dataObject = dataArray.getJSONObject(i);

          Image image = new Image();
          image.setName(dataObject.getString("name_client"));

          // JSONObject url = object.getJSONObject("url");
          image.setSmall(dataObject.getString("small"));
          image.setOriginal(dataObject.getString("orginal"));
          image.setTimestamp(dataObject.getString("timestamp"));

          images.add(image);

        }
      } catch (JSONException e) {
        e.printStackTrace();
      }

      mAdapter.notifyDataSetChanged();
    }
  }, new Response.ErrorListener() {
  @Override
  public void onErrorResponse(VolleyError error) {
    Log.e("", "Error: " + error.getMessage());
    pd.hide();
  }
});


AppController.getmInstance().addToRequsetQueue(req);

}
}

Answer 1

使用pd.dismiss()而不是pd.hide()。

Answer 2

而不是pd.hide()使用pd.dismiss()