VoiceRecognition.java - 没有Internet连接或飞行模式

Question

如果它看到手机没有信号/互联网连接等，我希望允许我的VoiceRecognition.java代码启动另一项活动。这是代码（从Google采用）。

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    // Inflate our UI from its XML layout description.
    setContentView(R.layout.voice_recognition);

    // Get display items for later interaction
    Button speakButton = (Button) findViewById(R.id.btn_speak);

    View exitButton = findViewById(R.id.exit_button);
    exitButton.setOnClickListener(this);

    mList = (ListView) findViewById(R.id.list);

    // Check to see if a recognition activity is present
    PackageManager pm = getPackageManager();
    List<ResolveInfo> activities = pm.queryIntentActivities(
            new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH), 0);
    if (activities.size() != 0) {


        speakButton.setOnClickListener(this);
    } 

    else {
        speakButton.setEnabled(false);

        Intent b = new Intent(this, ReminderEditActivity.class);
         startActivity(b);;
    }
}

我尝试使用ReminderEditActivity.class添加意图。此外，我试图翻转If语句，说if if（activitysize = 0）然后转到ReminderEditActivity.class。我在那里遇到了错误。