HandlerThread Looper Bundle

HandlerTest2.java

package com.jing.example.nknu_.handlertest2;

import android.os.Bundle;

import android.os.Handler;

import android.os.HandlerThread;

import android.os.Looper;

import android.os.Message;

import android.support.v7.app.AppCompatActivity;

public class HandlerTest2 extends AppCompatActivity {

private Handler handler = new Handler();

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_handler_test2);

//印出目前執行緒的ID

System.out.println("Activity-->" + Thread.currentThread().getId());

//產生一個HandlerThread對象，實現了使用Looper來處理消息對列的功能，這個類由android應用程序框架提供

HandlerThread handlerThread = new HandlerThread("handler_thread");

handlerThread.start();

MyHandler myHandler = new MyHandler(handlerThread.getLooper());

Message msg = myHandler.obtainMessage();

msg.obj="abc";

Bundle b = new Bundle();

b.putInt("age", 20);

b.putString("name", "Jhon");

msg.setData(b);

//將msg發送到目標對象，所謂的目標對象，就是生成該msg對象的handler對象

msg.sendToTarget();

}

class MyHandler extends Handler{

public MyHandler(){}

public MyHandler(Looper looper) {

super(looper);

}

@Override

public void handleMessage(Message msg){

Bundle b = msg.getData();

int age = b.getInt("age");

String name = b.getString("name");

String obj = (String) msg.obj;

System.out.println("age is " + age + ", name is " + name + ", obj is " + obj);

System.out.println("Handler--->" + Thread.currentThread().getId());

System.out.println("handlerMessage");

}

}

}

content_handler_test2.xml

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

xmlns:app="http://schemas.android.com/apk/res-auto"

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"

app:layout_behavior="@string/appbar_scrolling_view_behavior"

tools:context="com.jing.example.nknu_.handlertest2.HandlerTest2"

tools:showIn="@layout/activity_handler_test2">

<TextView

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="Hello World!" />

</RelativeLayout>