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
1 <?xml version="1.0" encoding="utf-8"?> 2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 3 xmlns:tools="http://schemas.android.com/tools" 4 android:layout_width="match_parent" 5 android:layout_height="match_parent" 6 android:orientation="vertical" 7 tools:context="com.wuxianedu.serviceoractivity.MainActivity"> 8 9 <ProgressBar android:id="@+id/jindu" 10 android:layout_width="match_parent" 11 android:layout_height="wrap_content" 12 style="?android:attr/progressBarStyleHorizontal" 13 /> 14 <Button android:id="@+id/wo" 15 android:layout_width="wrap_content" 16 android:layout_height="wrap_content" 17 android:text="点我下载"/> 18 19 </LinearLayout>
MainActivity.java
1 package com.wuxianedu.serviceoractivity; 2 3 import android.content.ComponentName; 4 import android.content.Intent; 5 import android.content.ServiceConnection; 6 import android.os.IBinder; 7 import android.support.v7.app.AppCompatActivity; 8 import android.os.Bundle; 9 import android.view.View; 10 import android.widget.ProgressBar; 11 import android.widget.Toast; 12 13 public class MainActivity extends AppCompatActivity implements View.OnClickListener { 14 //new一个启动Service类 15 private ServiceConnection serviceConnection 16 ; 17 private ProgressBar pop; 18 19 @Override 20 protected void onCreate(Bundle savedInstanceState) { 21 super.onCreate(savedInstanceState); 22 setContentView(R.layout.activity_main); 23 pop = (ProgressBar) findViewById(R.id.jindu); 24 findViewById(R.id.wo).setOnClickListener(this); 25 26 } 27 28 @Override 29 public void onClick(View v) { 30 switch (v.getId()){ 31 case R.id.wo: 32 //new了一个serviceConnection的回调事件, 33 if(serviceConnection == null){ 34 serviceConnection = new ServiceConnection() { 35 @Override 36 public void onServiceConnected(ComponentName name, IBinder service) { 37 //把Service里面的内部类堕胎为子类,来使用里面的方法 38 final MyService.Myhui myhui = (MyService.Myhui) service; 39 //参数为new出来静态接口 40 myhui.startDownload(new MyService.OnProgressChangeListener() { 41 @Override 42 public void onProgressChange(final int currentProgress) { 43 //为进度条赋值 44 pop.setMax(MyService.MAX); 45 //多线程 46 runOnUiThread(new Runnable() { 47 @Override 48 public void run() { 49 //为进度条赋值 50 pop.setProgress(currentProgress); 51 //判断当前值是否大于MAX,如果大于就是下载完了, 52 if(currentProgress >= MyService.MAX){ 53 Toast.makeText(MainActivity.this, "下载完成!", Toast.LENGTH_SHORT).show(); 54 } 55 } 56 }); 57 58 } 59 }); 60 } 61 @Override 62 public void onServiceDisconnected(ComponentName name) { 63 // Toast.makeText(MainActivity.this, "下载完成!", Toast.LENGTH_SHORT).show(); 64 } 65 }; 66 } 67 //启动Service服务 68 bindService(new Intent(this,MyService.class),serviceConnection,BIND_AUTO_CREATE); 69 break; 70 } 71 }; 72 }
MyService.java
1 package com.wuxianedu.serviceoractivity; 2 3 import android.app.Service; 4 import android.content.Intent; 5 import android.os.Binder; 6 import android.os.IBinder; 7 import android.support.annotation.Nullable; 8 import android.util.Log; 9 10 /** 11 * Created by Administrator on 2016/9/23. 12 */ 13 public class MyService extends Service { 14 private int currentProgress; 15 public static int MAX = 100; 16 17 @Nullable 18 //回调事件 19 @Override 20 public IBinder onBind(Intent intent) { 21 return new Myhui(); 22 } 23 24 class Myhui extends Binder{ 25 26 /*public MyService getService(){ 27 return MyService.this; 28 }*/ 29 public void startDownload (final OnProgressChangeListener onProgressChangeListener){ 30 new Thread(new Runnable() { 31 @Override 32 public void run() { 33 while (true){ 34 currentProgress += 5; 35 Log.d("main","=================="+currentProgress+""); 36 //每次给接口里面的方法赋值 37 onProgressChangeListener.onProgressChange(currentProgress); 38 try { 39 Thread.sleep(1000L); 40 } catch (InterruptedException e) { 41 e.printStackTrace(); 42 } 43 //判断当前值是否大于MAX最大值,如果大于跳出循环 44 if(currentProgress>=MAX){ 45 break; 46 } 47 } 48 } 49 }).start(); 50 } 51 } 52 //获取当前的值 53 interface OnProgressChangeListener { 54 void onProgressChange(int currentProgress); 55 } 56 }
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
能看到的代码不是自己的,自己写出来的才是自己的