Glide视图中的进度对话框

时间:2017-04-03 16:56:06

标签: android dialog alertdialog progressdialog android-glide

我使用Glide实现了一个Gallery。我的代码如下:

protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main2);

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

        recyclerView = (RecyclerView) findViewById(R.id.recycler_view);

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

        RecyclerView.LayoutManager mLayoutManager = new GridLayoutManager(getApplicationContext(), 2);
        recyclerView.setLayoutManager(mLayoutManager);
        recyclerView.setItemAnimator(new DefaultItemAnimator());
        recyclerView.setAdapter(mAdapter);

       recyclerView.addOnItemTouchListener(new GalleryAdapter.RecyclerTouchListener(getApplicationContext(), recyclerView, 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 = getSupportFragmentManager().beginTransaction();
                SlideshowDialogFragment newFragment = SlideshowDialogFragment.newInstance();
                newFragment.setArguments(bundle);
                newFragment.show(ft, "slideshow");
            }

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

            }
        }));

        fetchImages();
    }

    private void fetchImages() {

        pDialog.setMessage("Downloading images...");
        pDialog.show();

        JsonArrayRequest req = new JsonArrayRequest(endpoint,
                new Response.Listener<JSONArray>() {
                    @Override
                    public void onResponse(JSONArray response) {
                        Log.d(TAG, response.toString());
                        pDialog.hide();

                        images.clear();
                        for (int i = 0; i < response.length(); i++) {
                            try {
                                JSONObject object = response.getJSONObject(i);
                                Image image = new Image();
                                image.setName(object.getString("name"));

                                JSONObject url = object.getJSONObject("url");
                                image.setSmall(url.getString("small"));
                                image.setMedium(url.getString("medium"));
                                image.setLarge(url.getString("large"));
                                image.setTimestamp(object.getString("timestamp"));

                                images.add(image);

                            } catch (JSONException e) {
                                Log.e(TAG, "Json parsing error: " + e.getMessage());
                            }
                        }

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

        // Adding request to request queue
        AppController.getInstance().addToRequestQueue(req);
    }

我使用了进度对话框。目前,当我打开图库时,Dialog会在几秒钟后消失。然后活动仍然是空的。图片会在一段时间后加载。我想避免这种情况。我希望对话框保持更长时间,至少一半的图像加载(比如10个中的5个)。

2 个答案:

答案 0 :(得分:0)

pDialog.hide();放在onResponse()的末尾,因为您在循环结果数组并设置数据之前隐藏了进度对话框。

答案 1 :(得分:0)

  

我希望对话框保持更长时间,至少到一半的图像   加载(比如10分中的5分)。

如果您想实现这一目标,可以根据 if(a[i]+1==a[i+1]) //print it else { System.out.print(a[i]); i=a.length; }//stop the loop 内的需要,在一定次数的迭代后隐藏progressDialog。在这种情况下,您必须在每次迭代时通知适配器有关数据集更改(onResponse())。

您可以按以下方式修改代码:

notifyDataSetChanged()

希望这有帮助。