Android----->多线程的实现Thread、IntentService的运用

 

 

 

首先建立一个Intent.xml

 

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
    <Button
        android:id="@+id/btnStartNormalService"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Start NormalService"
        />
    <Button
        android:id="@+id/btnStartIntentService"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Start IntentService"
        />
</LinearLayout>

 

建立一个MyService.java 实现Thread多线程

package com.szy.service;

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

public class MyService extends Service
{
    protected static final String TAG = "IntentActivity";
    @Override
    public void onCreate()
    {
        super.onCreate();
    }

    @Override
    public void onDestroy()
    {
        super.onDestroy();
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId)
    {
        new MyThread().start();
        return START_STICKY;
    }

    @Override
    public IBinder onBind(Intent intent)
    {
        return null;
    }
    
    private class MyThread extends Thread
    {

        @Override
        public void run()
        {
            try
            {
                Log.i(TAG, "MyService线程ID："+Thread.currentThread().getId());
                Log.i(TAG, "文件下载....");
                Thread.sleep(2000);
            } catch (InterruptedException e)
            {
                e.printStackTrace();
            }
            
        }
        
    }

}

 

再建立一个ExampleIntentService.java的IntentService

package com.szy.service;

import android.app.IntentService;
import android.content.Intent;
import android.util.Log;

public class ExampleIntentService extends IntentService
{
    protected static final String TAG = "IntentActivity";
    
    public ExampleIntentService()
    {
        super("ExampleIntentService");
    }

    @Override
    protected void onHandleIntent(Intent intent)
    {
        
        try
        {
            Log.i(TAG, "MyService线程ID："+Thread.currentThread().getId());
            Log.i(TAG, "文件下载....");
            Thread.sleep(2000);
        } catch (InterruptedException e)
        {
            e.printStackTrace();
        }

    }

}

 

最后还有建立一个IntentActivity.xml 的Activity

package com.szy.service;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class IntentActivity extends Activity
{
    protected static final String TAG = "IntentActivity";
    
    private Button btnStartNormalService;
    private Button btnStartIntentService;
    @Override
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.intent);
        btnStartNormalService = (Button) findViewById(R.id.btnStartNormalService);
        btnStartIntentService = (Button) findViewById(R.id.btnStartIntentService);
        btnStartNormalService.setOnClickListener(listener);
        btnStartIntentService.setOnClickListener(listener);
    }
    
    private OnClickListener listener=new OnClickListener()
    {
        
    
        public void onClick(View v)
        {
            Intent intent;
            switch (v.getId())
            {
            case R.id.btnStartNormalService:
                intent=new Intent(IntentActivity.this, MyService.class);
                Log.i(TAG, "主线程ID："+Thread.currentThread().getId());
                startService(intent);
                break;
            case R.id.btnStartIntentService:
                intent=new Intent(IntentActivity.this, ExampleIntentService.class);
                Log.i(TAG, "主线程ID："+Thread.currentThread().getId());
                startService(intent);
                break;
            default:
                break;
            }
            
        }
    };
}

 

记得修改AndroidManifest.mxl

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="com.szy.service"
      android:versionCode="1"
      android:versionName="1.0">
    <uses-sdk android:minSdkVersion="8" />

    <application android:icon="@drawable/icon" android:label="@string/app_name">
        <activity android:name=".MainActivity"
                  android:label="@string/app_name">
        </activity>
        
        <activity android:name=".BinderActivity"
                  android:label="@string/app_name">
        </activity>
        
        <activity android:name=".IntentActivity"
                  android:label="@string/app_name">
             <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        
        <service android:name=".ExampleService" />
        <service android:name=".BinderService" />
        <service android:name=".MyService"/>
        <service android:name=".ExampleIntentService"/>
    </application>
</manifest>