我在程序中的哪里添加計時器代碼？

Question

這是我的代碼的頂部：

public class MainActivity extends ActionBarActivity
{
    private static final int MY_DATA_CHECK_CODE = 0;
    public static MainActivity currentActivity;
    TextToSpeech mTts;
    private String targetURL;
    private String urlParameters;
    private Button btnClick;
    private String clicking = "clicked";
    private String[] ipaddresses = new String[]{
        "http://10.0.0.1:8098/?cmd=nothing",
        "http://192.168.1.10:8098/?cmd=nothing"};
    private String iptouse = "";
    private TextView text;
    private boolean connectedtoipsuccess = false;
    private int counter = 0;
    private NotificationCompat.Builder mbuilder;
    private Timer timer = new Timer();
    TextView timerTextView;
    long startTime = 0;

    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        addListenerOnButton();
        currentActivity = this;
        initTTS();
    }

而且我想將此代碼添加到程序中，因此當我運行程序時，計時器將運行。

    Handler timerHandler = new Handler();
    Runnable timerRunnable = new Runnable() {

        @Override
        public void run() {
            long millis = System.currentTimeMillis() - startTime;
            int seconds = (int) (millis / 1000);
            int minutes = seconds / 60;
            seconds = seconds % 60;

            timerTextView.setText(String.format("%d:%02d", minutes, seconds));

            timerHandler.postDelayed(this, 500);
        }
    };

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.test_activity);

        timerTextView = (TextView) findViewById(R.id.timerTextView);

        Button b = (Button) findViewById(R.id.button);
        b.setText("start");
        b.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                Button b = (Button) v;
                if (b.getText().equals("stop")) {
                    timerHandler.removeCallbacks(timerRunnable);
                    b.setText("start");
                } else {
                    startTime = System.currentTimeMillis();
                    timerHandler.postDelayed(timerRunnable, 0);
                    b.setText("stop");
                }
            }
        });
    }

  @Override
    public void onPause() {
        super.onPause();
        timerHandler.removeCallbacks(timerRunnable);
        Button b = (Button)findViewById(R.id.button);
        b.setText("start");
    }

我想要做的是一旦運行程序，計時器就會啟動。

但是我找不到如何以及在何處添加這部分計時器代碼。 我在onCreate中嘗試過，在onCreate之后嘗試過，但是由於您只可以添加@override，它會給出錯誤

Answer 1

您可能想要設置另一個類（在同一類中或在其自己的類中）並實現Runnable，然后從on create make實例到該runnable。