Question

我有一些代码（最后包含完整的方法），其中包括一个“进度”对话框。问题在于“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，直到代码完成后才消失，然后消失。因此，它会在适当的时间出现，并在适当的时间被关闭，但是并没有显示这两者之间的进度。

这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该变量？

                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);
                }

完整方法在这里：


    // 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();

Answer 2

为什么不调用一个函数来做一件事

declare @model table (
            Model varchar(100)
            , Model_id varchar(100), Model_num varchar(100)
            , Catg_code varchar(100)
            );

declare @car table(Model_id varchar(100));

declare @prod table(Model_id varchar(100), Prod_cd varchar(100))

declare @master table(Model_id varchar(100), StartDate date, EndDate date);


insert into @master(Model_id, StartDate, EndDate)
    values
        ('011', '2020-04-04', '2020-04-04')
        , ('022', '2019-05-05', '2019-06-05');

insert into @prod(Model_id, Prod_cd)
    values
        ('011', 'prod-cd-01')
        , ('022', 'prod-cd-02');

insert into @model(Model, Model_id, Model_num, Catg_code)
        values
            ('CD', '011', '100001', 'catg-code-01')
            , ('EM', '022', '200001', 'catg-code-02');

insert into @car(Model_id)
    values ('011'), ('022'), ('011'), ('011');


select  p.Model_id, p.Prod_cd
        , (
            select  count(1)
            from    @model as m
                    inner join @car as c on m.Model_id = c.Model_id
            where   m.Model = 'CD'
                    and m.Model_id = p.Model_id
        ) as m_cnt
        , (
            select  count(1)
            from    @model as m
                    inner join @car as c on m.Model_id = c.Model_id
            where   m.Model = 'EM'
                    and m.Model_id = p.Model_id
        ) as e_cnt
        , m.StartDate, m.EndDate
from    @prod as p
        inner join @master as m on p.Model_id = m.Model_id

Answer 3

一个可能的问题是您正在从非UI线程更新进度栏。您可以尝试将setProgress调用移至UI线程：

（假设您的方法在活动中）

YourActivity.this.runOnUiThread(new Runnable(){
   public void run(){
      progressDialog.setProgress(intProgress);
   }
});

Android Studio进度对话框未显示进度？

3 个答案: