Android学习笔记---使用Service模仿下载效果

今天学了Service，做了一个进度条的效果，和大家分享一下，

来贴一下布局文件

<?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:orientation="vertical"
    tools:context="com.wuxianedu.serviceoractivity.MainActivity">

    <ProgressBar android:id="@+id/jindu"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        style="?android:attr/progressBarStyleHorizontal"
        />
    <Button android:id="@+id/wo"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="点我下载"/>

</LinearLayout>

MainActivity.java

package com.wuxianedu.serviceoractivity;

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

public class MainActivity extends AppCompatActivity implements View.OnClickListener {
    //new一个启动Service类
    private ServiceConnection serviceConnection
            ;
    private ProgressBar pop;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
         pop = (ProgressBar) findViewById(R.id.jindu);
        findViewById(R.id.wo).setOnClickListener(this);

    }

    @Override
    public void onClick(View v) {
        switch (v.getId()){
            case R.id.wo:
                //new了一个serviceConnection的回调事件，
                if(serviceConnection == null){
                    serviceConnection = new ServiceConnection() {
                        @Override
                        public void onServiceConnected(ComponentName name, IBinder service) {
                                    //把Service里面的内部类堕胎为子类，来使用里面的方法
                            final MyService.Myhui myhui = (MyService.Myhui) service;
                                    //参数为new出来静态接口
                                myhui.startDownload(new MyService.OnProgressChangeListener() {
                                    @Override
                                    public void onProgressChange(final int currentProgress) {
                                        //为进度条赋值
                                        pop.setMax(MyService.MAX);
                                        //多线程
                                        runOnUiThread(new Runnable() {
                                            @Override
                                            public void run() {
                                                //为进度条赋值
                                                pop.setProgress(currentProgress);
                                                //判断当前值是否大于MAX,如果大于就是下载完了，
                                                if(currentProgress >= MyService.MAX){
                                                    Toast.makeText(MainActivity.this, "下载完成！", Toast.LENGTH_SHORT).show();
                                                }
                                            }
                                        });

                                    }
                                });
                        }
                        @Override
                        public void onServiceDisconnected(ComponentName name) {
                           // Toast.makeText(MainActivity.this, "下载完成！", Toast.LENGTH_SHORT).show();
                        }
                    };
                }
                //启动Service服务
                bindService(new Intent(this,MyService.class),serviceConnection,BIND_AUTO_CREATE);
                break;
        }
    };
}

MyService.java

package com.wuxianedu.serviceoractivity;

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

/**
 * Created by Administrator on 2016/9/23.
 */
public class MyService extends Service {
    private int currentProgress;
    public static int MAX = 100;

    @Nullable
    //回调事件
    @Override
    public IBinder onBind(Intent intent) {
        return new Myhui();
    }

    class Myhui extends Binder{

        /*public MyService getService(){
            return MyService.this;
        }*/
        public void startDownload (final OnProgressChangeListener onProgressChangeListener){
            new Thread(new Runnable() {
                @Override
                public void run() {
                    while (true){
                        currentProgress += 5;
                        Log.d("main","=================="+currentProgress+"");
                        //每次给接口里面的方法赋值
                        onProgressChangeListener.onProgressChange(currentProgress);
                        try {
                            Thread.sleep(1000L);
                        } catch (InterruptedException e) {
                            e.printStackTrace();
                        }
                        //判断当前值是否大于MAX最大值，如果大于跳出循环
                       if(currentProgress>=MAX){
                            break;
                        }
                    }
                }
            }).start();
        }
    }
    //获取当前的值
    interface OnProgressChangeListener {
        void onProgressChange(int currentProgress);
    }
}

代码就这些，注释里面写的非常清楚，大家看一下就能看懂啦

下面附上代码下载地址：明天早上附上，网速太慢了