Android Studio升级至Giraffe后按钮触发的Dialog无法显示求助

我的应用通过Dialog向用户提示信息并获取输入，之前所有Dialog都正常工作。但将Android Studio从Chipmunk升级到Giraffe版本后，按钮触发的Dialog不再显示，但菜单调用的Dialog可以正常弹出（比如点击菜单Quit选项时的退出确认Dialog）。

正常工作的菜单Dialog实现 #

public void showAlertQuit(String title, String message) {
    AlertDialog.Builder builder = new AlertDialog.Builder(this);
    builder.setMessage(message);
    builder.setTitle(title);
    builder.setCancelable(false);
    builder.setPositiveButton("Yes", (dialog, which) -> {
        dialog.dismiss();
        finish();
    });
    builder.setNegativeButton("No", (dialog, which) -> dialog.dismiss());
    AlertDialog alertDialog = builder.create();
    alertDialog.show();
}

异常场景：Connect按钮触发Dialog无响应 #

点击Connect按钮时，相关Dialog无法弹出，核心代码如下：

Connect按钮点击事件 #

public void onClickConnect(View view) {
    // For running on the emulator which does not support bluetooth
    if (inEmulator) {
        address = "00:11:22:33:44:55";
        conntype = "bluetooth";
        setUiLaps(true);
        deviceConnected = true;
        TString = textView.getText().toString();
        TString = TString + "\nConnection opened to " + address + ".\nSet laps > 0.";
        textView.setText(TString);
        lapsHead.setText(R.string.set_laps);
        // get the track associated with the address of the timer
        processTimerAddress();
        startVol = Integer.parseInt(Objects.requireNonNull(trackLaneData.get(0).get("startVol")));
        falseVol = Integer.parseInt(Objects.requireNonNull(trackLaneData.get(0).get("falseVol")));
        winVol = Integer.parseInt(Objects.requireNonNull(trackLaneData.get(0).get("winVol")));
        oMenu.setGroupVisible(0, false);  // hide the options menu
    } else { // running on actual hardware
        /*
         * Try to connect to a BlueTooth Device that will be sending lap signals
         * Launch the BTDeviceListActivity to see the available devices and/or do a scan
         */
        Intent serverIntent = null;
        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.S) {
            serverIntent = new Intent(MainActivity.this, BTDeviceListActivity.class);
            startActivityForResult(serverIntent, Constants.REQUEST_CONNECT_DEVICE);
        }
    }
}

触发Dialog的核心逻辑 #

public void processTimerAddress() {
    // look for a timer and the active track
    DBHandler db = new DBHandler(MainActivity.this);
    trackId = db.GetActiveTrackByConnectAddr(conntype, address);
    if (trackId == -1) { // timer not found, timer and track must be added
        showTimerAlert("Timer Absent", "Timer with connection: " + conntype + " - " + 
                address + ",  does not exist.\n" +
                "Lets add the Timer and Track");
    } else if (trackId == 0) { // timer exists, but there is no active track
        int timerid = db.GetTimerByConnect(conntype, address);
        showNoTrackAlert( "Active Track Missing", "Timer with connection: " + conntype + " - " +
                address + ", is present.\n" +
                "However, there is no active track.  Lets add a track for this timer", timerid);
    } else { // a track exists for this race
        // get the track and lane information for this track
        trackLaneData = db.GetTrackByTrackId(trackId);
        laneCnt = Integer.parseInt(Objects.requireNonNull(trackLaneData.get(0).get("lanecnt")));
        ArrayList<HashMap<String, String>> laneList = db.GetLanesByTrackId(trackId);
        int s = laneList.size();
        for (int i = 0; i < s; i++) {
            trackLaneData.add(laneList.get(i));
        }
    }
    db.close();
}

无法显示的Dialog实现 #

public void showTimerAlert(String title, String message) {
    Log.d(TAG, "Show Timer Alert " + title);
    AlertDialog.Builder builder = new AlertDialog.Builder(this);
    builder.setMessage(message);
    builder.setTitle(title);
    builder.setCancelable(false);
    builder.setPositiveButton("OK", (dialog, which) -> startAddTimerTrack());
    builder.setNegativeButton("CANCEL", (dialog, which) -> dialog.dismiss());
    AlertDialog alertDialog = builder.create();
    alertDialog.show();
}

已尝试的排查手段 #

• 在菜单中调用showTimerAlert，Dialog可正常显示；
• 在onClickConnect方法的if语句前、processTimerAddress调用前添加showAlertQuit调用，预期点击Connect按钮弹出退出确认Dialog，但未成功；
• 更换Dialog构建时的Context：
  • 原代码：AlertDialog.Builder builder = new AlertDialog.Builder(this);
  • 改为：AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
  • 改用全局Context对象：AlertDialog.Builder builder = new AlertDialog.Builder(context);
    以上尝试均未解决问题，恳请帮忙排查。

内容的提问来源于stack exchange，提问作者Chet