Java 如何每2秒更改ProgressDialog的消息？

我有ProgressDialog，我想每2秒更改一次消息。在这段代码中，我将进度时间设置为10秒。所以我想让它有5条信息

---

在代码中使用

Timer

，并设置

schedule

方法的时间

在

计划中

方法

• 第一个参数是

  TimerTask

• 第二个参数是

  延迟

  时间
• 第三个参数是

  期间

  时间

试试这个

private void showProgressDialog() {

    progressDialog = new ProgressDialog(this, getProgressDailogStyle());
    progressDialog.setMessage("Processing ...");
    progressDialog.show();
    progressDialog.setCancelable(false);

    Timer timer = new Timer();
    timer.schedule(new TimerTask() {

        @Override
        public void run() {
            // do something
            Message message=new Message();  
            message.what=0;  
            mHandler.sendMessage(message);  
        }
    }, 0, 2000);
}

更新

private Handler mHandler = new Handler(){  
    @Override  
    public void handleMessage(Message msg) {  

        // TODO Auto-generated method stub  
        if(msg.what == 0){  
            //change message
        }  
    }     
};  

---

请尝试下面的代码，并且setMessage必须在runOnUiThread中

public void setMessage(String message) {
    if (dialog != null && dialog.isShowing()) {
        ((Activity) context).runOnUiThread(new Runnable() {
            @Override
            public void run() {
                dialog.setMessage(message);
            }
        });
    }
}

你可以用

---

由于您已经在运行处理程序，因此很容易将消息显示到UI线程，即ProgressDialog。不要在循环中运行处理程序10秒，而是以5秒间隔运行它，即像这样延迟2秒

private int count = 1;
Runnable runnable = null;
private void showProgressDialog() {

    progressDialog = new ProgressDialog(this, getProgressDailogStyle());
    progressDialog.setMessage("Processing ...");
    progressDialog.show();
    progressDialog.setCancelable(false);

    final Handler handler = new Handler();
    runnable = new Runnable() {
        public void run() {
            Log.i("message",""+counter);
            if (counter == 5) {
                handler.removeCallbacks(runnable);
                progressDialog.dismiss();
               // mInterstitialAd.show();
            }else {
                progressDialog.setMessage("your message");
                handler.postDelayed(runnable, 2000);
                counter++;
            }


        }
    };
    handler.post(runnable);
}

---

我把新消息放在哪里？您可以在

处理程序中更改消息。祝您好运。@devonjoe很高兴听到这个消息。
public void setMessage(String message) {
    if (dialog != null && dialog.isShowing()) {
        ((Activity) context).runOnUiThread(new Runnable() {
            @Override
            public void run() {
                dialog.setMessage(message);
            }
        });
    }
}

    count = 0;
    progressDialog = new ProgressDialog(this, getProgressDailogStyle());
    progressDialog.setMessage("Processing ...");
    progressDialog.show();
    progressDialog.setCancelable(false);

    new CountDownTimer(10000, 2000) {

        public void onTick(long millisUntilFinished) {
            //here you can have your logic to set message
            count=count+1;
            if (count==1){
                progressDialog.setMessage("Processing 1");
            }else if (count==2){
                progressDialog.setMessage("Processing 2");
            } 
              // until the count = 5 


        }

        public void onFinish() {
            //the progress is finish
            count = 0;
            progressDialog.dismiss();

        }

    }.start();

private int count = 1;
Runnable runnable = null;
private void showProgressDialog() {

    progressDialog = new ProgressDialog(this, getProgressDailogStyle());
    progressDialog.setMessage("Processing ...");
    progressDialog.show();
    progressDialog.setCancelable(false);

    final Handler handler = new Handler();
    runnable = new Runnable() {
        public void run() {
            Log.i("message",""+counter);
            if (counter == 5) {
                handler.removeCallbacks(runnable);
                progressDialog.dismiss();
               // mInterstitialAd.show();
            }else {
                progressDialog.setMessage("your message");
                handler.postDelayed(runnable, 2000);
                counter++;
            }


        }
    };
    handler.post(runnable);
}