runOnUiThread中的ProgressDialog

Question

我正在尝试显示进度对话框并在runOnUiThread中更新它 但进度条从未显示过。当我用＆＃34; new Thread＆＃34;替换runOnUiThread时它工作正常。但我希望它能与runOnUiThread一起使用

这是我的代码，我删除了不必要的代码

public class test extends Activity {

private ProgressDialog progress;
Handler progressBarHandler = new Handler();


@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
testing();
}

public void testing() {
    progress=new ProgressDialog(this);
    progress.setMessage("Saving Progress");
    progress.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
    progress.setProgress(0);
    progress.setMax(100);
    progress.setCancelable(false);
    progress.show();
    runOnUiThread(new Runnable() {
        @Override
        public void run() {
        //do some work 
        for (int i =0; i<100;i++){

        //some work


             progressBarHandler.post(new Runnable() {

                        @Override
                        public void run() {
                            progress.setProgress(finalCount);
                        }
             });
        }
}
}

Answer 1

试试这个

public class MainActivity extends AppCompatActivity {

private ProgressDialog progress;
Handler workHandler;

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

    progress=new ProgressDialog(this);
    progress.setMessage("Saving Progress");
    progress.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
    progress.setProgress(0);
    progress.setMax(100);
    progress.setCancelable(false);
    progress.show();

    workHandler = new Handler(new HandlerThread("workHandlerThread").getLooper());

    workHandler.post(new Runnable() {
        @Override
        public void run() {

            //Do some work


            runOnUiThread(new Runnable() {
                @Override
                public void run() {
                    progress.setProgress(/*work result*/);
                }
            });
        }
    });
}
}

我的想法是你对HandlerThread的工作绑定到workHandler，并使用runOnUiThread()

将结果发布回UI