android - 在 Android 上的 onPrepareDialog 上自定义 AlertDialog 的内容时透明背景和无按钮

Question

我在使用 onPrepareDialog 方法更新 AlertDialog 的内容时遇到了一些困难。

我正在设置 AlertDialog 的内容，但是出现在屏幕上的对话框没有按钮也没有背景。问题可能与 Builder 有关。

@Override
protected Dialog onCreateDialog(int id) {
    switch (id) {
    case DIALOG_USER_INFORMATION:
        AlertDialog.Builder builder = new AlertDialog.Builder(this);
        return builder.create();
    default:
        return null;
    }
}

@Override
protected void onPrepareDialog(final int id, final Dialog dialog) {
    switch (id) {
    case DIALOG_USER_INFORMATION:
        createUserInformationAlertDialog(dialog);
        break;
    }
}

public void createUserInformationAlertDialog(Dialog dialogIn) {
    AlertDialog alertDialog = (AlertDialog) dialogIn;
    View dialoglayout = alertDialog.getLayoutInflater().inflate(
            R.layout.dialog_user_info,
            (ViewGroup) findViewById(R.id.dialog_user_layout_root));
    AlertDialog.Builder builder = new AlertDialog.Builder(this);
    builder.setView(dialoglayout);
    EventAttendant ea = this.event.getCrowd().getAttendees()
            .get(positionUserToHaveInformationDisplayedOnTheDialog);
    final EventAttendant clone = (EventAttendant) ea.clone();

        // Setting values
        TextView textView = (TextView) dialoglayout.findViewById(R.id.user_name_value);
        textView.setText(ea.getName());

        builder.setPositiveButton(Locale_PT_BR.SEE_ON_FACEBOOK,
                new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog,
                            int whichButton) {/* User clicked OK so do some stuff */
                    }
                });
        builder.setNegativeButton(Locale_PT_BR.BACK,
                new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog,
                            int whichButton) {...}
                });
        builder.setView(dialoglayout);
        alertDialog.setView(dialoglayout);
        alertDialog.setContentView(dialoglayout);
}

Answer 1

您应该在 onCreateDialog() 中创建对话框并在 onPrepareDialog() 中更改文本。

@Override
protected Dialog onCreateDialog(int id) {
    switch (id) {
    case DIALOG_USER_INFORMATION:
        return createUserInformationAlertDialog();

    default:
        return null;
    }
}

@Override
protected void onPrepareDialog(final int id, final Dialog dialog) {
    switch (id) {
    case DIALOG_USER_INFORMATION:
        prepareUserInformationAlertDialog((AlertDialog)dialog)
        break;
    }
}

public Dialog createUserInformationAlertDialog() {
    AlertDialog.Builder builder = new AlertDialog.Builder(this);
    builder.setPositiveButton(Locale_PT_BR.SEE_ON_FACEBOOK,
            new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog,
                        int whichButton) {/* User clicked OK so do some stuff */
                }
            });
    builder.setNegativeButton(Locale_PT_BR.BACK,
            new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog,
                        int whichButton) {...}
            });
    return builder.create();
}

public void prepareUserInformationAlertDialog(AlertDialog alertDialog) {
    EventAttendant ea = this.event.getCrowd().getAttendees()
            .get(positionUserToHaveInformationDisplayedOnTheDialog);
    final EventAttendant clone = (EventAttendant) ea.clone();

    View dialoglayout = alertDialog.getLayoutInflater().inflate(
            R.layout.dialog_user_info, null, false);
    // Setting values               
    TextView textView = (TextView) dialoglayout.findViewById(R.id.user_name_value);
    textView.setText(ea.getName());             
    alertDialog.setView(dialogLayout)
}

我没有测试过这段代码，所以它可能包含一些错误。