activity_main.xml

xmlns:tools="http://schemas.android.com/tools"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:paddingBottom="@dimen/activity_vertical_margin"

android:paddingLeft="@dimen/activity_horizontal_margin"

android:paddingRight="@dimen/activity_horizontal_margin"

android:paddingTop="@dimen/activity_vertical_margin"

tools:context=".MainActivity" >

android:id="@+id/button1"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_alignParentLeft="true"

android:layout_alignParentTop="true"

android:layout_marginTop="16dp"

android:text="通信" />

MainActivity.java

public class MainActivity extends Activity implements OnClickListener{

Handler mainHanler,subHandler;

Button btn1;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

initViews();

mainHanler = new Handler(){

@Override

public void handleMessage(Message msg) {

super.handleMessage(msg);

if(msg.what == 1){

System.out.println(msg.obj.toString());

}

}

};

new WorkThread().start();

}

public void initViews(){

btn1 = (Button) findViewById(R.id.button1);

btn1.setOnClickListener(this);

}

@Override

public void onClick(View v) {

switch (v.getId()) {

case R.id.button1:

//交互

Message msg = Message.obtain();

msg.what = 1;

msg.obj = "兒子,哥來看你啦!";

subHandler.sendMessage(msg);

break;

}

}

public class WorkThread extends Thread{

@Override

public void run() {

Looper.prepare();

subHandler = new Handler(){

@Override

public void handleMessage(Message msg) {

if(msg.what == 1){

//接受消息

System.out.println(msg.obj.toString());

}

//發(fā)消息給主線程

Message m = Message.obtain();

m.what = 1;

m.obj = "老爸我來啦!";

mainHanler.sendMessage(m);

}

};

Looper.loop();

}

}

}