Android|Android 基础控件学习--Timer Android|应用

Android 基础控件学习--Timer

【Android|Android 基础控件学习--Timer】

package net.blogjava.mobile; import java.util.Timer; import java.util.TimerTask; import android.app.Activity; import android.os.Bundle; import android.os.Handler; import android.os.Message; import android.widget.ProgressBar; public class Main extends Activity { private ProgressBar progressBar; private Handler handler = new Handler() {public void handleMessage(Message msg) { switch (msg.what) { case 1: int currentProgress = progressBar.getProgress() + 2; if (currentProgress > progressBar.getMax()) currentProgress = 0; progressBar.setProgress(currentProgress); break; } super.handleMessage(msg); } }; private TimerTask timerTask = new TimerTask() {public void run() { Message message = new Message(); message.what = 1; handler.sendMessage(message); } }; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); progressBar = (ProgressBar) findViewById(R.id.progressbar); Timer timer = new Timer(); timer.schedule(timerTask, 0, 500); } }

大致思路，定义定时器及触发时的执行方法，方法中向handler发送消息，Handler接收到消息做响应动作。