import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.app.Activity;
import android.util.Log;
import android.widget.TextView;public class MainActivity extends Activity {private final static String TAG = "ThreadTest";TextView myTv = null;int i = 0;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);myTv = (TextView) this.findViewById(R.id.tv1);// 执行该线程new Thread(runnable).start();}/*** 主线程监听者*/Handler myHandler = new Handler() {public void handleMessage(android.os.Message msg) {Log.i(TAG, "begin--->handleMessage");if (msg.what == 0x000001) {myTv.setText(String.valueOf(i));}Log.i(TAG, "end--->handleMessage");super.handleMessage(msg);};};/*** 子线程事件源*/Runnable runnable = new Runnable() {@Overridepublic void run() {while (!Thread.currentThread().isInterrupted()) {i++;Message msg = new Message();msg.what = 0x000001;Log.i(TAG, "begin--->sendMessage");myHandler.sendMessage(msg);Log.i(TAG, "end--->sendMessage");Log.i(TAG, "begin--->dosomething");try {Thread.sleep(1000);} catch (InterruptedException e) {e.printStackTrace();}Log.i(TAG, "end--->dosomething");}}};}

import android.os.Bundle;
import android.os.Handler;
import android.app.Activity;
import android.widget.TextView;public class MainActivity extends Activity {private final static String TAG = "ThreadTest";TextView myTv = null;//handler在主线程中创建，调用post的时候钩子会把它钩回主线程Handler  myHandler = new Handler();int i = 0;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);myTv = (TextView) this.findViewById(R.id.tv1);new Thread(runnable1).start();}/*** 子线程*/Runnable runnable1 = new Runnable() {@Overridepublic void run() {while (true) {i++;myHandler.post(runnable2);try {Thread.sleep(1000);} catch (InterruptedException e) {e.printStackTrace();}}}};/*** 使用钩子将该子线程钩到主线程中*/Runnable runnable2 = new Runnable() {@Overridepublic void run() {myTv.setText(String.valueOf(i));}};}