【Android】App自動更新之通知欄下載

版本更新說明

這裏有調用UpdateService啓動服務檢查下載安裝包等 

1. 文件下載，下完後寫入到sdcard 

2. 如何在通知欄上顯示下載進度

3. 下載完畢自動安裝 

4. 如何判斷是否有新版本

版本更新的主類

package com.wei.update;

import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.util.HashMap;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import org.json.JSONException;
import org.json.JSONObject;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;
import org.xmlpull.v1.XmlPullParserFactory;

import com.wei.util.MyApplication;


import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.pm.PackageManager.NameNotFoundException;
import android.os.Handler;

/**
 * 版本更新主類,這裏有調用UpdateService啓動服務檢查下載安裝包等 1. 文件下載，下完後寫入到sdcard 2. 如何在通知欄上顯示下載進度
 * 3. 下載完畢自動安裝 4. 如何判斷是否有新版本
 * 
 * @author david
 */
public class UpdateManager {
	private static String packageName;// = "com.yipinzhe"; // 應用的包名
	private static String jsonUrl = "version.txt"; // JSON版本文件URL
	private static String xmlUrl = "version.xml"; // XML版本文件URL
	private static final String DOWNLOAD_DIR = "/"; // 應用下載後保存的子目錄

	private Context mContext;
	HashMap<String, String> mHashMap;// 保存解析的XML信息
	int versionCode, isNew;

	public UpdateManager(Context context) {
		this.mContext = context;
		packageName = context.getPackageName();
		jsonUrl = MyApplication.site + jsonUrl;
		xmlUrl = MyApplication.site + xmlUrl;
		checkVersion();
	}

	Handler checkHandler = new Handler() {
		@Override
		public void handleMessage(android.os.Message msg) {
			if (msg.what == 1) {
				// 發現新版本，提示用戶更新
				StringBuffer message = new StringBuffer();
				message.append(mHashMap.get("note").replace("|", "\n"));
				AlertDialog.Builder alert = new AlertDialog.Builder(mContext);
				alert.setTitle("軟件升級")
						.setMessage(message.toString())
						.setPositiveButton("更新",
								new DialogInterface.OnClickListener() {
									@Override
									public void onClick(DialogInterface dialog,
											int which) {
										// 開啓更新服務UpdateService
										System.out.println("你點擊了更新");
										Intent updateIntent = new Intent(
												mContext, UpdateService.class);
										/*
										 * updateIntent.putExtra("downloadDir",
										 * DOWNLOAD_DIR);
										 * updateIntent.putExtra("apkUrl",
										 * mHashMap.get("url"));
										 */
										mContext.startService(updateIntent);
									}
								})
						.setNegativeButton("取消",
								new DialogInterface.OnClickListener() {
									@Override
									public void onClick(DialogInterface dialog,
											int which) {
										dialog.dismiss();
									}
								});
				alert.create().show();
			}
		};
	};

	/** 檢查是否有新版本 */
	public void checkVersion() {
		try {
			// 獲取軟件版本號,對應AndroidManifest.xml下android:versionCode
			versionCode = mContext.getPackageManager().getPackageInfo(
					packageName, 0).versionCode;
		} catch (NameNotFoundException e) {
			e.printStackTrace();
		}

		new Thread() {
			@Override
			public void run() {
				String result = null;
				/*
				 * try { //如果服務器端是JSON文本文件 result =
				 * MyApplication.handleGet(jsonUrl); if (result != null) {
				 * mHashMap = parseJSON(result); } } catch (Exception e1) {
				 * e1.printStackTrace(); }
				 */

				InputStream inStream = null;
				try {
					// 本機XML文件
					 inStream =  UpdateManager.class.getClassLoader().getResourceAsStream("version.xml");
					// 如果服務器端是XML文件
					inStream = new URL(xmlUrl).openConnection().getInputStream();
					if (inStream != null)
						mHashMap = parseXml(inStream);
				} catch (Exception e1) {
					e1.printStackTrace();
				}
				if (mHashMap != null) {
					int serviceCode = Integer.valueOf(mHashMap.get("version"));
					if (serviceCode > versionCode) {// 版本判斷,返回true則有新版本
						isNew = 1;
					}
				}
				checkHandler.sendEmptyMessage(isNew);
			};
		}.start();
	}

	/** 解析服務器端的JSON版本文件 */
	public HashMap<String, String> parseJSON(String str) {
		HashMap<String, String> hashMap = new HashMap<String, String>();
		try {
			JSONObject obj = new JSONObject(str);
			hashMap.put("version", obj.getString("version"));
			hashMap.put("name", obj.getString("name"));
			hashMap.put("url", obj.getString("url"));
			hashMap.put("note", obj.getString("note"));
		} catch (JSONException e) {
			e.printStackTrace();
		}
		return hashMap;
	}

	/** 解析服務器端的XML版本文件 */
	public HashMap<String, String> parseXml(InputStream inputStream) {
		HashMap<String, String> hashMap = new HashMap<String, String>();
		try {
			XmlPullParser parser = XmlPullParserFactory.newInstance().newPullParser();
			parser.setInput(inputStream, "GBK");//設置數據源編碼
			int eventCode = parser.getEventType();//獲取事件類型
			while(eventCode != XmlPullParser.END_DOCUMENT) {
				System.out.println("循環開始");
				switch (eventCode){
					case XmlPullParser.START_DOCUMENT: //開始讀取XML文檔  
					System.out.println("START_DOCUMENT");
					break;
					case XmlPullParser.START_TAG://開始讀取某個標籤
						if("version".equals(parser.getName())) {
							hashMap.put(parser.getName(), parser.nextText());
						} else if("name".equals(parser.getName())) {   
							hashMap.put(parser.getName(), parser.nextText());
						} else if("url".equals(parser.getName())) {   
							hashMap.put(parser.getName(), parser.nextText());
						} else if("note".equals(parser.getName())) {   
							hashMap.put(parser.getName(), parser.nextText());
						}
					break;
				    case XmlPullParser.END_TAG:
				    break;
				}
			   eventCode = parser.next();//繼續讀取下一個元素節點，並獲取事件碼
			    
			}
			System.out.println(hashMap.get("version"));
		} catch(Exception e) {
			
		}
		return hashMap;	
		

		/*try {
			DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
			DocumentBuilder builder = factory.newDocumentBuilder();
			Document document = builder.parse(inStream);
			Element root = document.getDocumentElement();//獲取根節點
			NodeList childNodes = root.getChildNodes();//獲得所有子節點,然後遍歷
			for (int j = 0; j < childNodes.getLength(); j++) {
				Node childNode = childNodes.item(j);
				if (childNode.getNodeType() == Node.ELEMENT_NODE) {
					Element childElement = (Element) childNode;
					if ("version".equals(childElement.getNodeName())) {
						hashMap.put("version", childElement.getFirstChild()
								.getNodeValue());
					}
					else if (("name".equals(childElement.getNodeName()))) {
						hashMap.put("name", childElement.getFirstChild()
								.getNodeValue());
					}
					else if (("url".equals(childElement.getNodeName()))) {
						hashMap.put("url", childElement.getFirstChild()
								.getNodeValue());
					} else if (("note".equals(childElement.getNodeName()))) {
						hashMap.put("note", childElement.getFirstChild()
								.getNodeValue());
					}
				}
			}
		} catch (Exception e) {
			e.printStackTrace();
		}*/
		
	}
}

版本更新的服務類

package com.wei.update;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;

import com.wei.util.MyApplication;
import com.wei.wotao.R;

//import android.annotation.SuppressLint;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.app.Service;
import android.content.Intent;
import android.net.Uri;
import android.os.Environment;
import android.os.Handler;
import android.os.IBinder;
import android.os.Message;
import android.view.View;
import android.widget.RemoteViews;

/**
 * 下載安裝包的服務類
 * @author david
 */

public class UpdateService extends Service {

	// 文件存儲
	private File saveDir;
	private File saveFile;
	private String apkUrl;
	
	// 通知欄
	private NotificationManager updateNotificationManager = null;
	private Notification updateNotification = null;
	
	// 通知欄跳轉Intent
	private Intent updateIntent = null;
	private PendingIntent updatePendingIntent = null;

	// 下載狀態
	private final static int DOWNLOAD_COMPLETE = 0;
	private final static int DOWNLOAD_FAIL = 1;
	
	private RemoteViews contentView;

	@Override
	public int onStartCommand(Intent intent, int flags, int startId) {
		System.out.println("onStartCommand");
		contentView = new RemoteViews(getPackageName(), R.layout.activity_app_update);
		// 獲取傳值
		String downloadDir = intent.getStringExtra("downloadDir");	
		apkUrl = MyApplication.site+intent.getStringExtra("apkUrl");
		// 如果有SD卡,則創建APK文件
		if (android.os.Environment.MEDIA_MOUNTED.equals(android.os.Environment
				.getExternalStorageState())) {
			
			saveDir = new File(Environment.getExternalStorageDirectory(),
					downloadDir);
			saveFile = new File(saveDir.getPath(), getResources()
					.getString(R.string.app_name) + ".apk");
		}

		this.updateNotificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
		this.updateNotification = new Notification();

		// 設置下載過程中，點擊通知欄，回到主界面
		updateIntent = new Intent();
		updatePendingIntent = PendingIntent.getActivity(this, 0, updateIntent, 0);
		// 設置通知欄顯示內容
		updateNotification.icon = R.drawable.icon_info;
		updateNotification.tickerText = "開始下載";
		updateNotification.contentView.setProgressBar(R.id.progressBar1, 100, 0, true);
		updateNotification.setLatestEventInfo(this,
				getResources().getString(R.string.app_name), "0%",
				updatePendingIntent);
		// 發出通知
		updateNotificationManager.notify(0, updateNotification);
		new Thread(new DownloadThread()).start();
		return super.onStartCommand(intent, flags, startId);
	}

	@Override
	public IBinder onBind(Intent intent) {
		return null;
	}

	/** 下載的線程 */
	private class DownloadThread implements Runnable {
		Message message = updateHandler.obtainMessage();

		public void run() {
			message.what = DOWNLOAD_COMPLETE;
			if (saveDir!=null && !saveDir.exists()) {
				saveDir.mkdirs();
			}
			if (saveFile!=null && !saveFile.exists()) {
				try {
					saveFile.createNewFile();
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
			try {
				long downloadSize = downloadFile(apkUrl, saveFile);
				if (downloadSize > 0) {// 下載成功
					updateHandler.sendMessage(message);
				}
			} catch (Exception ex) {
				ex.printStackTrace();
				message.what = DOWNLOAD_FAIL;		
				updateHandler.sendMessage(message);// 下載失敗
			}
		}

		public long downloadFile(String downloadUrl, File saveFile)
				throws Exception {
			int downloadCount = 0;
			int currentSize = 0;
			long totalSize = 0;
			int updateTotalSize = 0;
			int rate = 0;// 下載完成比例

			HttpURLConnection httpConnection = null;
			InputStream is = null;
			FileOutputStream fos = null;

			try {
				URL url = new URL(downloadUrl);
				httpConnection = (HttpURLConnection) url.openConnection();
				httpConnection.setRequestProperty("User-Agent",
						"PacificHttpClient");
				if (currentSize > 0) {
					httpConnection.setRequestProperty("RANGE", "bytes="
							+ currentSize + "-");
				}
				httpConnection.setConnectTimeout(200000);
				httpConnection.setReadTimeout(200000);
				updateTotalSize = httpConnection.getContentLength();//獲取文件大小
				if (httpConnection.getResponseCode() == 404) {
					throw new Exception("fail!");
				}
				is = httpConnection.getInputStream();
				fos = new FileOutputStream(saveFile, false);
				byte buffer[] = new byte[1024 * 1024 * 3];
				int readsize = 0;
				while ((readsize = is.read(buffer)) != -1) {
					fos.write(buffer, 0, readsize);
					
					totalSize += readsize;//已經下載的字節數
					rate = (int) (totalSize * 100 / updateTotalSize);//當前下載進度
					// 爲了防止頻繁的通知導致應用吃緊，百分比增加10才通知一次
					if ((downloadCount == 0) || rate - 0 > downloadCount) {
						downloadCount += 1;
						updateNotification.setLatestEventInfo(
								UpdateService.this, "正在下載", rate + "%",
								updatePendingIntent);//設置通知的內容、標題等
						updateNotification.contentView.setProgressBar(R.id.progressBar1, 100, rate, true);
						updateNotificationManager.notify(0, updateNotification);//把通知發佈出去
					}
					
					
					
				}
			} finally {
				if (httpConnection != null) {
					httpConnection.disconnect();
				}
				if (is != null) {
					is.close();
				}
				if (fos != null) {
					fos.close();
				}
			}
			return totalSize;
		}
	}

	private Handler updateHandler = new Handler() {
		@Override
		public void handleMessage(Message msg) {
			switch (msg.what) {
			case DOWNLOAD_COMPLETE:
				//當下載完畢，自動安裝APK(ps,打電話 發短信的啓動界面工作)
				Uri uri = Uri.fromFile(saveFile);//根據File獲得安裝包的資源定位符
				Intent installIntent = new Intent(Intent.ACTION_VIEW);//設置Action
				installIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);//新的Activity會在一個新任務打開，而不是在原先的任務棧
				installIntent.setDataAndType(uri, "application/vnd.android.package-archive");//設置URI的數據類型
				startActivity(installIntent);//把打包的Intent傳遞給startActivity
				
				//當下載完畢，更新通知欄，且當點擊通知欄時，安裝APK
				updatePendingIntent = PendingIntent.getActivity(UpdateService.this, 0, installIntent, 0);
				updateNotification.defaults = Notification.DEFAULT_SOUND;// 鈴聲提醒
				updateNotification.setLatestEventInfo(UpdateService.this, getResources().getString(R.string.app_name),
						"下載完成,點擊安裝", updatePendingIntent);
				updateNotificationManager.notify(0, updateNotification);

				// 停止服務
				stopService(updateIntent);
				break;
			case DOWNLOAD_FAIL:
				// 下載失敗
				updateNotification.setLatestEventInfo(UpdateService.this,
						getResources().getString(R.string.app_name),
						"下載失敗,網絡連接超時", updatePendingIntent);
				updateNotificationManager.notify(0, updateNotification);
				break;
			default:
				stopService(updateIntent);
				break;
			}
		}
	};
}