1. MainActivity代码
import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
public class HandlerActivity extends Activity {
private Button button = null;
private Handler handler = new Handler(){
@Override
public void handleMessage(Message msg) {
// TODO Auto-generated method stub
int arg1 = msg.arg1;
int arg2 = msg.arg2;
int what = msg.what;
Object result = msg.obj;
System.out.println("--arg1-->>" + arg1);
System.out.println("--arg2-->>" + arg2);
System.out.println("--what-->>" + what);
System.out.println("--result-->>" + result);
Bundle data = msg.getData();
System.out.println("-->>" + data.getStringArray("str").length);
}
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
button = (Button)findViewById(R.id.button1);
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
new Thread(new MyThread()).start();
}
});
}
//android访问网络资源不能在UI 主线程中进行访问,只能重新起一个线程进行网络资源的访问
public class MyThread implements Runnable{
@Override
public void run() {
// TODO Auto-generated method stub
//第一种方法
// Message message = Message.obtain();
// message.arg1 = 1;
// message.arg2 = 2;
// message.what = 3;
// message.obj = "Hello World!";
// handler.sendMessage(message);
//第二种方法
// Message message = Message.obtain(handler);
// message.arg1 = 1;
// message.arg2 = 2;
// message.what = 3;
// message.obj = "Hello World!";
// message.sendToTarget();
//第三种方法
// Message message = Message.obtain(handler, 33);
// message.arg1 = 1;
// message.arg2 = 2;
// message.what = 3;
// message.obj = "Hello World!";
// message.sendToTarget();
//第四种方式
// Message message = Message.obtain(handler, 2, "tukangzheng");
// message.sendToTarget();
//第五种方式
Message message = Message.obtain(handler, 9, 1, 2, "gaojing");
Bundle bundle = new Bundle();
bundle.putStringArray("str", new String[]{"tukangzheng", "gaojing", "liujinlong"});
message.setData(bundle);
message.sendToTarget();
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.handler, menu);
return true;
}
}
2. main.xml代码
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
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=".HandlerActivity" >
<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="177dp"
android:text="Button" />
</RelativeLayout>
3. 注册网络访问权限
<uses-permission android:name="android.permission.INTERNET"/>