显示 AlertDialog 的异步任务

Question

在过去的几天里，我无法解决对话框的问题。我正在运行一个线程来显示对话框 5000 毫秒并将其删除。我正在尝试举杯（“成功”）。问题是我也第二次收到该对话框。我是 Android 开发新手，我需要使用异步任务来解决这个问题，以便我可以延迟第二个线程并显示一个带有肯定按钮而不是吐司的警报dialog.builder。我花了很多时间，但我很困惑如何实现这个

这里我将我的凭据发送到服务器，在发送时我显示了一个 5000 毫秒的进度对话框，我想要一个单独的线程来显示dialog.builder 的积极信息按钮。（当用户在 logcat 中得到响应时，我应该检查 logcat 中的responsecode==1 或不从 logcat 中显示生成器）

如果可能的话，请有人帮助我用一些代码片段来解决这个问题。

提前致谢。

这是我需要实现异步任务的代码

Button signin = (Button) findViewById(R.id.regsubmitbtn);
    signin.setOnClickListener(new OnClickListener() {
        public void onClick(View v) {
            // showDialog(0);
            t = new Thread() {
                public void run() {
                    register();
                    try {
                        while (counter < 2) {
                            showmsg(0);
                            Thread.sleep(5000);
                            removeDialog(0);
                            // Toast.makeText(Register.this, "Registerd", Toast.LENGTH_LONG).show();
                            showmsg(1);
                            // toast.show();

                            Thread.sleep(1000);

                        }

                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                }
            };
            t.start();
        }
    });

}

@Override
protected Dialog onCreateDialog(int id) {
    switch (id) {
    case 0: {
        ++counter;
        dialog = new ProgressDialog(this);
        if (counter == 1) {
            dialog.setMessage("Registering...");
        }
        else {
            String resultsRequestSOAP = "";
            if (Log.v("TAG", String.valueOf(resultsRequestSOAP)) == 1)
                ;
            {
                Context context = getApplicationContext();
                CharSequence text = "Registerd";
                int duration = Toast.LENGTH_LONG;

                Toast toast = Toast.makeText(context, text, duration);
                toast.show();
            }
        }
        dialog.setIndeterminate(true);
        dialog.setCancelable(true);
        return dialog;
    }
    }
    return null;
}

public void showmsg(int actionsToBePerformedOnScreen) {
    Message msg = new Message();
    msg.what = actionsToBePerformedOnScreen;
    handler.sendMessage(msg);

}

public Handler handler = new Handler() {
    @Override
    public void handleMessage(Message msg) {
        switch (msg.what) {
        case 0:

            showDialog(0);

            break;

        case 1:
            // clear all images in the list
            removeDialog(0);
            break;

        }

    };
};

Answer 1

简单：在onPreExecute中显示对话框，在doInBackground中注册()并在onPostExecute中隐藏对话框。最后，在 onclick 中执行 new RegisterTask().execute()。

 private class RegisterTask extends AsyncTask<Void, Void, Boolean> {
  private final ProgressDialog dialog = new ProgressDialog(YourClass.this);

  protected void onPreExecute() {
     this.dialog.setMessage("Signing in...");
     this.dialog.show();
  }

  protected Boolean doInBackground(final Void unused) {
     return Main.this.register(); //don't interact with the ui!
  }

  protected void onPostExecute(final Boolean result) {
     if (this.dialog.isShowing()) {
        this.dialog.dismiss();
     }
     if (result.booleanValue()) {
     //also show register success dialog
     }
  }
}

Answer 2

为什么不使用 Android AsyncTask？
例如：

public class MyPreloader extends AsyncTask<InputObject, Void, OutputObject>{
private Context context;
private ProgressDialog dialog;

public MyPreloader(Context context){
    this.context = context;
}

@Override
protected void onPreExecute() {
    dialog = new ProgressDialog(context);
    dialog.setMessage("Please wait...");
    dialog.setIndeterminate(true);
    dialog.show();
    super.onPreExecute();
}   

@Override
protected ResponseBase doInBackground(InputObject... params) {
InputObject input = params[0]; 
//some code for background work
    }

@Override
protected void onPostExecute(OutputObject result) {
    if (dialog.isShowing()) {
        dialog.dismiss();
    }
    super.onPostExecute(result);
}