经过特定计算后,Android对话框关闭

时间:2019-11-24 21:52:55

标签: java android dialog

我遇到以下问题:

我使用Dialog这样创建了一个等待中的微调器

final Dialog progDialog = new Dialog(context);
progDialog.setContentView(R.layout.progress_dialog);
progDialog.setTitle("Calculating...");
progDialog.setCancelable(false);
progDialog.setCanceledOnTouchOutside(false);

WindowManager.LayoutParams lp = progDialog.getWindow().getAttributes();
lp.dimAmount = 0.7f;
progDialog.show();

然后,我在后台计算一些东西

for()...
    for()...

计算完成后,我要使用取消对话框

progDialog.dismiss();

但是,这导致我的对话框根本无法显示。当我删除最后一行时,将显示该对话框,但永远不会将其关闭。有解决办法吗?

1 个答案:

答案 0 :(得分:3)

您最好尝试使用AsyncTask

private class YourAsyncTask extends AsyncTask<Void, Void, Void> {
    private ProgressDialog progDialog;

    public YourAsyncTask(MyMainActivity activity) {
        progDialog = new ProgressDialog(activity);
    }

    @Override
    protected void onPreExecute() {
       progDialog.setContentView(R.layout.progress_dialog);
       progDialog.setTitle("Calculating...");
       progDialog.setCancelable(false);
       progDialog.setCanceledOnTouchOutside(false);

       progDialog.show();
    }
    @Override
    protected Void doInBackground(Void... args) {
        // do background work here
        return null;
    }
    @Override
    protected void onPostExecute(Void result) {
         // do UI work here
        if (progDialog.isShowing()) {
            progDialog.dismiss();
        }
    }
}

在您的主要活动中使用上面的代码。然后,在doInBackground中进行计算。

要为您的计算设置计时器,请尝试以下代码:

 Runnable progressRunnable = new Runnable() {

        @Override
        public void run() {
            progDialog.cancel();
        }
    };

    Handler pdCanceller = new Handler();
    pdCanceller.postDelayed(progressRunnable, 3000);

添加显示/隐藏:

progDialog.setOnCancelListener(new DialogInterface.OnCancelListener() {
    @Override
    public void onCancel(DialogInterface dialog) {
        theLayout.setVisibility(View.GONE);
    }
});

更新

从API 26开始不推荐使用ProgressDialog类