Android Studio进度对话框未显示进度？

Question

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我有一些代码（最后包含完整的方法），其中包括一个Progress对话框。问题是“进度”对话框没有显示任何进度（它没有从0移到100），它一直保持零并且没有任何移动，直到代码完成，然后消失了。因此它在正确的时间出现，并在正确的时间被关闭，但没有显示其间的进度。

这里是我尝试增加对话框的部分。 intProgress变量正在运行，我可以在日志中看到它从0递增到100，所以为什么在进度对话框中不显示？

                for(Animal animal : lstAnimals) {
                    i = i + 1;
                    animal.addToSqlLite(strTableName, animal, sqLiteDatabase);
                    int intProgress = (int) (((double) (i) / (double) lstAnimals.size()) * 100);
                    Log.d(TAG, "vvvv: " + "i = " + i + " total = " + lstAnimals.size() + " prog = " + intProgress);
                    progressDialog.setProgress(intProgress);
                }

此处为完整方法：

    // fetches data from the server and copies it across to the sqlite database
public void fetchDataFromServerAndAddToSqlLite(ProgressBar progressBar, String strTableName, SQLiteDatabase sqLiteDatabase, Context context) {

//        progressBar.setVisibility(View.VISIBLE);
        ProgressDialog progressDialog = new ProgressDialog(context);
        progressDialog.setTitle("Wildgoosechase");
        progressDialog.setMessage("Downloading Animals...");
        progressDialog.setProgressStyle(progressDialog.STYLE_HORIZONTAL);
        progressDialog.setCancelable(false);
        progressDialog.setMax(100);
        progressDialog.setProgress(0);
        progressDialog.show();

        Retrofit retrofit = new Retrofit.Builder()
                .baseUrl("https://xxxxxxxxxxxx.co.za/")
                .addConverterFactory(GsonConverterFactory.create())
                .build();

        wildgoosechaseAPI myWildGooseChaseApi = retrofit.create(wildgoosechaseAPI.class);

        retrofit2.Call<List<Animal>> call = myWildGooseChaseApi.getAnimals();

        call.enqueue(new Callback<List<Animal>>() {
            @Override
            public void onResponse(Call<List<Animal>> call, Response<List<Animal>> response) {

                if(!response.isSuccessful()){
//                    progressBar.setVisibility(View.GONE);
                    progressDialog.dismiss();
                }

                List<Animal> lstAnimals = response.body();
                int i = 0;

                for(Animal animal : lstAnimals) {
                    i = i + 1;
                    animal.addToSqlLite(strTableName, animal, sqLiteDatabase);
                    int intProgress = (int) (((double) (i) / (double) lstAnimals.size()) * 100);
                    Log.d(TAG, "vvvv: " + "i = " + i + " total = " + lstAnimals.size() + " prog = " + intProgress);
                    progressDialog.setProgress(intProgress);
                }

//                progressBar.setVisibility(View.GONE);
                progressDialog.dismiss();


            }

            @Override
            public void onFailure(Call<List<Animal>> call, Throwable t) {
//                progressBar.setVisibility(View.GONE);
                progressDialog.dismiss();

            }
        });


    }

Answer 1

我认为缺少thraed //线程用于更改进度值

    Thread thread = new Thread(new Runnable() {
        @Override
        public void run() {
            try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            setProgressValue(progress + 1);
        }
    });
    thread.start();