Android——Service装取数据

在Service里面装数据，从Activity里面用serviceConnection取数据

xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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="com.example.chenshuai.myapplication.ActivityService"
    android:orientation="vertical">

    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="测试普通服务"
        android:textSize="30sp"/>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <Button
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="一般启动服务"
            android:onClick="yibanqdonclick"/>
        <Button
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="一般停止服务"
            android:onClick="yibantzonclick" />
    </LinearLayout>
    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="测试绑定服务"
        android:textSize="30sp"/>
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <Button
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="绑定启动服务"
            android:onClick="bangdingqdonclick"/>

        <Button
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="读取服务"
            android:onClick="duqusjonclick"/>
        <Button
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="绑定停止服务"
            android:onClick="bangdingtzonclick" />
    </LinearLayout>

</LinearLayout>

Service

package com.example.chenshuai.myapplication;

import android.app.Service;
import android.content.Intent;
import android.os.Binder;
import android.os.IBinder;
import android.util.Log;

public class MyService_1 extends Service {
    public MyService_1() {

        //构造方法里测试
        Log.e("TAG","构造Service");
    }

    int i = 0;

    Boolean aBoolean = true;
    //自定义类，继承Binder，装数据
    public class Mybinder extends Binder
    {
        public int getText()
        {
            return i;
        }
    }

    //绑定的回调方法
    //必须要重写
    @Override
    public IBinder onBind(Intent intent) {
        //绑定方法
        // TODO: Return the communication channel to the service.
       // throw new UnsupportedOperationException("Not yet implemented");
        Log.e("TAG","绑定并调用");
        //return  new Binder();

        //启动子线程，改变i的值
        new Thread()
        {
            public void run()
            {
                while (aBoolean)
                {
                    try {
                        Thread.sleep(1000);
                    } catch (Exception e) {
                        e.printStackTrace();
                    }

                    i++;
                }
            }
        }.start();

        return new Mybinder();
    }

    @Override
    public void onCreate() {

        //创建方法
        Log.e("TAG","创建Service");
        super.onCreate();
    }

    @Override
    public void onDestroy() {
        //销毁方法
        Log.e("TAG","销毁Service");
        super.onDestroy();
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {

        //
        Log.e("TAG","启动命令Command");
        return super.onStartCommand(intent, flags, startId);
    }
    //解绑时候调用

    @Override
    public boolean onUnbind(Intent intent) {

        Log.e("TAG","解除绑定");

        //停止循环
        aBoolean = false;
        return super.onUnbind(intent);
    }
}

java

package com.example.chenshuai.myapplication;

import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.ServiceConnection;
import android.os.Bundle;
import android.os.IBinder;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.View;
import android.widget.Toast;

public class ActivityService extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_activity_service);
    }

    //普通方式启动Service
    //参考Activity的启动方式
    public void yibanqdonclick(View view)
    {
        //通过意图
        //显示意图
        Intent intent = new Intent(this,MyService_1.class);
        startService(intent);

        Toast.makeText(ActivityService.this, "启动Service", Toast.LENGTH_SHORT).show();
    }
    public void yibantzonclick(View view)
    {
        //通过意图
        //显示意图
        Intent intent = new Intent(this,MyService_1.class);
        stopService(intent);

        Toast.makeText(ActivityService.this, "启动Service", Toast.LENGTH_SHORT).show();
    }
    ServiceConnection serviceConnection;

    MyService_1.Mybinder mybinder;

    public void bangdingqdonclick(View view)
    {
        Intent intent = new Intent(this,MyService_1.class);

        //实现ServiceConnection接口
        if (serviceConnection == null) {
            serviceConnection = new ServiceConnection() {
                @Override
                public void onServiceConnected(ComponentName name, IBinder service) {

                    Log.e("TAG", "连接服务");

                    //接收数据 Mybinder
                    mybinder = (MyService_1.Mybinder)service;

                }

                //异常断开才会调用
                @Override
                public void onServiceDisconnected(ComponentName name) {

                    Log.e("TAG", "断开连接");

                }
            };
        }
        //参数：意图，连接，连接方式 BIND_AUTO_CREATE自动创建
        bindService(intent,serviceConnection, Context.BIND_AUTO_CREATE);

        Toast.makeText(ActivityService.this, "连接服务成功", Toast.LENGTH_SHORT).show();
    }

    public void bangdingtzonclick(View view)
    {
        //判断是否已经绑定，连接是否为空
        if (serviceConnection != null)
        {
            //解除绑定
            unbindService(serviceConnection);

            serviceConnection = null;

            Toast.makeText(ActivityService.this, "解除绑定", Toast.LENGTH_SHORT).show();
        }
        else
        {
            Toast.makeText(ActivityService.this, "尚未绑定", Toast.LENGTH_SHORT).show();
        }
    }

    //读取服务数据
    public void duqusjonclick(View view)
    {
       //调用服务对象的方法
        if (mybinder != null)
        {
            Toast.makeText(ActivityService.this, "读取的信息是："+mybinder.getText(), Toast.LENGTH_SHORT).show();
        }

    }

    //重写回调方法，防止强制退出时，绑定服务还在运行
    @Override
    protected void onDestroy() {

        if (serviceConnection != null) {
            //解除绑定
            unbindService(serviceConnection);

            serviceConnection = null;
        }
        super.onDestroy();
    }
}