Android 偏好活动

发布于 2024-11-08 01:39:14 字数 403 浏览 4 评论 0原文

我有一个偏好活动，并且希望如果单击其中一个项目，它将启动后台工作并在前台显示一个漂亮的进度条，直到后台任务完成。怎么办？？？

编写的代码：

 public boolean onPreferenceClick(Preference preference) {
  showProgressDialog();
  new Thread(new Runnable() {
   public void run() {
    doSomething();
    hideProgressDialog();
   }       //Runnable.run()
  }).start();
  return false;
 }
});

但是上面的代码没有显示进度对话框。并出现ANR错误。

谢谢。

原文

I have a preference activity and want that if one of its items is clicked it will start a background work and show a nice progress bar in foreground until the background task finishes. how to do it???

Code writtenis:

 public boolean onPreferenceClick(Preference preference) {
  showProgressDialog();
  new Thread(new Runnable() {
   public void run() {
    doSomething();
    hideProgressDialog();
   }       //Runnable.run()
  }).start();
  return false;
 }
});

But the above code is not showing progress dialog. and ANR error occurs.

Thanks.

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碍人泪离人颜 2024-11-15 01:39:14

在您的活动类中添加以下代码：

// Need handler for callbacks to UI Threads
    // For background operations
    final Handler mHandler = new Handler();

    // Create Runnable for posting results
    final Runnable mUpdateDone = new Runnable() {
        public void run() {
            progDialog.hide();      
            // Do your task here what you want after the background task is finished.           
        }
    };

在 onPreferenceClick 中编写以下代码：

progDialog = ProgressDialog.show(AddPhoto.this, "", "Uploading Photo...");
            new Thread() {
                public void run() {
                    // Start your task here.....                                                        
                    mHandler.post(mUpdateDone);
                }
                }.start();

如果不适合您，请告诉我！

Add following code in your activity class:

// Need handler for callbacks to UI Threads
    // For background operations
    final Handler mHandler = new Handler();

    // Create Runnable for posting results
    final Runnable mUpdateDone = new Runnable() {
        public void run() {
            progDialog.hide();      
            // Do your task here what you want after the background task is finished.           
        }
    };

Write following code in onPreferenceClick:

progDialog = ProgressDialog.show(AddPhoto.this, "", "Uploading Photo...");
            new Thread() {
                public void run() {
                    // Start your task here.....                                                        
                    mHandler.post(mUpdateDone);
                }
                }.start();

Let me know if doesn't work for you!

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