121 lines
3.1 KiB
Plaintext
121 lines
3.1 KiB
Plaintext
package com.novelbook.android.service;
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import android.app.IntentService;
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import android.content.Intent;
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import android.graphics.Bitmap;
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import android.graphics.BitmapFactory;
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import android.os.IBinder;
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import android.os.Message;
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import android.util.Log;
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import java.io.BufferedInputStream;
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import java.io.IOException;
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import java.net.HttpURLConnection;
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import java.net.URL;
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public class MyIntentService extends IntentService {
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public static final String DOWNLOAD_URL="download_url";
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public static final String INDEX_FLAG="index_flag";
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public static UpdateUI updateUI;
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final String TAG ="testIntentService";
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public static void setUpdateUI(UpdateUI updateUIInterface){
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updateUI=updateUIInterface;
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}
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public MyIntentService(){
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super("MyIntentService");
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}
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/**
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* 实现异步任务的方法
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* @param intent Activity传递过来的Intent,数据封装在intent中
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*/
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@Override
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protected void onHandleIntent(Intent intent) {
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//在子线程中进行网络请求
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Bitmap bitmap=downloadUrlBitmap(intent.getStringExtra(DOWNLOAD_URL));
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Message msg1 = new Message();
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msg1.what = intent.getIntExtra(INDEX_FLAG,0);
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msg1.obj =bitmap;
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//通知主线程去更新UI
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if(updateUI!=null){
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updateUI.updateUI(msg1);
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}
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//mUIHandler.sendMessageDelayed(msg1,1000);
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Log.d(TAG,"onHandleIntent");
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}
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//----------------------重写一下方法仅为测试------------------------------------------
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@Override
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public void onCreate() {
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Log.d(TAG,"onCreate");
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super.onCreate();
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}
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@Override
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public void onStart(Intent intent, int startId) {
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super.onStart(intent, startId);
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Log.d(TAG,"onStart");
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}
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@Override
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public int onStartCommand(Intent intent, int flags, int startId) {
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Log.d(TAG,"onStartCommand");
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return super.onStartCommand(intent, flags, startId);
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}
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@Override
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public void onDestroy() {
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Log.d(TAG,"onDestroy");
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super.onDestroy();
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}
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@Override
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public IBinder onBind(Intent intent) {
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Log.d(TAG,"onBind");
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return super.onBind(intent);
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}
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public interface UpdateUI{
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void updateUI(Message message);
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}
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private Bitmap downloadUrlBitmap(String urlString) {
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HttpURLConnection urlConnection = null;
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BufferedInputStream in = null;
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Bitmap bitmap=null;
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try {
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final URL url = new URL(urlString);
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urlConnection = (HttpURLConnection) url.openConnection();
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in = new BufferedInputStream(urlConnection.getInputStream(), 8 * 1024);
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bitmap= BitmapFactory.decodeStream(in);
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} catch (final IOException e) {
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e.printStackTrace();
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} finally {
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if (urlConnection != null) {
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urlConnection.disconnect();
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}
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try {
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if (in != null) {
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in.close();
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}
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} catch (final IOException e) {
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e.printStackTrace();
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}
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}
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return bitmap;
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}
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}
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