更新app

 流程是这样，在远程服务器上存储了一个和android客户端类似的androidManifest.xml文件，对比客户端和服务器两个文件中的versionName，如果不一样，说明有新版本；

xml文件

：

<update>
        <version>90</version>
        <versionName>3.0.20</versionName>
        <name>fy.apk</name>
        <url>/res/a/fy.apk</url>
</update>

  

public class UpdateService extends Service {
private NotificationManager nm;
	private Notification notification;
	private RemoteViews views;
	private int notificationId = R.drawable.logo;
	UpdateManager um;
private MyHandler myHandler;

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

	@Override
	public void onStart(Intent intent, int startId) {
		super.onStart(intent, startId);
	}

	@Override
	public void onCreate() {
		// TODO Auto-generated method stub
		super.onCreate();
		um = new UpdateManager(getApplicationContext());
		notificationId = getResources().getIdentifier("updateId", "id",
				getPackageName());//应用下指定应用资源id
		myHandler = new MyHandler();
	}

	@Override
	public int onStartCommand(Intent intent, int flags, int startId) {
		Log.i("tcp", "UpdateService-onStartCommand");
			update();
		return super.onStartCommand(intent, flags, startId);
	}
	@Override
	public void onDestroy() {
		super.onDestroy();
	}

	private void update() {
		String checkUpdateTime = PublicUtil.getSharedValue(this, PublicUtil.SYSTEM_SETTINGS, PublicUtil.CHECKUPDATAETIME, "");
		String currentTime = PublicUtil.getDateTime().split(" ")[0];
		if(checkUpdateTime.equals(currentTime))return;
		int type = um.getUpdateType();
		if(type>=1)
			PublicUtil.putSharedValue(this, PublicUtil.SYSTEM_SETTINGS, PublicUtil.CHECKUPDATAETIME, currentTime);
		Log.i("tcp","type=====" + type);
		if (type >= 2) {
			updateId = type - 2;
			creatNotification();
		}
	}
	void creatNotification() {
		nm = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
		notification = new Notification();
		notification.icon = R.drawable.logo;
		try {
			notification.number = Integer.valueOf(mHashMap.get("number"));
		} catch (Exception e) {
			// TODO: handle exception
		}
		notification.flags = Notification.FLAG_AUTO_CANCEL;
		// notification.icon=android.R.drawable.stat_sys_download_done;
		notification.tickerText = getString(R.string.app_name) + "软件更新";
		notification.when = System.currentTimeMillis();
		notification.defaults = Notification.DEFAULT_LIGHTS;

		// 设置任务栏中下载进程显示的views
		views = new RemoteViews(getPackageName(), R.layout.update);
		Intent intent = new Intent(getApplicationContext(),
				UpdateActivity.class);
		System.out.println("==============" + updateId);
		intent.putExtra("updateId", updateId);
		PendingIntent contentIntent = PendingIntent.getActivity(this, 0,
				intent, 0);
		notification.setLatestEventInfo(this, "饭友", "饭友有新版本啦",
				contentIntent);
		// 将下载任务添加到任务栏中
		notification.contentView = views;
		nm.notify(notificationId, notification);
		// nm.

		// 初始化下载任务内容views
		// Message message = myHandler.obtainMessage(2, 0);
		// myHandler.sendMessage(message);
	}

class MyHandler extends Handler {
		// private Context context;
		// public MyHandler(Looper looper, Context c) {
		// super(looper);
		// this.context = c;
		// }

		@Override
		public void handleMessage(Message msg) {
			super.handleMessage(msg);
			if (msg != null) {
				switch (msg.what) {
				case 0:
					creatNotification();
					break;
				case 1:
					break;
				case 2:
					notification.contentView = views;
					nm.notify(notificationId, notification);
					break;
				}
			}
		}
	}
}

 

 

   

   class UpdateManager{
	private HashMap<String, String> mHashMap;
/**
	 * 检查软件是否有更新版本
	 * 
	 * @return
	 */
	public int getUpdateType()
	{
		// 获取当前软件版本
		int versionCode = getVersionCode(mContext);
		String versionName = getVersionName(mContext);
		System.out.println("versionCode==" + versionCode);
		// 把version.xml放到网络上，然后获取文件信息
		InputStream inStream = null;
		try {
			URL url = new URL(PublicUtil.getWebRoot()+"/res/a/fy-update.xml");
			HttpURLConnection urlCon = (HttpURLConnection)url.openConnection();
			urlCon.setConnectTimeout(3000);
			urlCon.setReadTimeout(3000);
			inStream = urlCon.getInputStream();
		} catch (Exception e) {
			// TODO: handle exception
			e.printStackTrace();
			return -1;
		}
//		// 获取当前软件版本
//		int versionCode = getVersionCode(mContext);
//		// 把version.xml放到网络上，然后获取文件信息
//		InputStream inStream = ParseXmlService.class.getClassLoader().getResourceAsStream("version.xml");
//		// 解析XML文件。 由于XML文件比较小，因此使用DOM方式进行解析
		ParseXmlService service = new ParseXmlService();
		try
		{
			mHashMap = service.parseXml(inStream);
		} catch (Exception e)
		{
			e.printStackTrace();
		}
		if (null != mHashMap)
		{
			int serviceCode = Integer.valueOf(mHashMap.get("version"));
			// 版本判断
			if (serviceCode > versionCode)
			{
				try{
					String updateType = mHashMap.get("versionName");
					PublicVariable.serverVersion = updateType;
					String[] code_s = updateType.split("\\.");
					String[] code_c = versionName.split("\\.");
					int type = 0;
					if(Integer.valueOf(code_c[0])<Integer.valueOf(code_s[0])){
						type = 3;
					}else if(Integer.valueOf(code_c[1])<Integer.valueOf(code_s[1])){
						type = 2;
					}else if(Integer.valueOf(code_c[2])<Integer.valueOf(code_s[2])){
						type = 1;
					}
					PublicUtil.putSharedValue(mContext, PublicUtil.SYSTEM_SETTINGS, PublicUtil.UPDATECODE, type>0?type+"-"+updateType:"");
					return type;
				} catch (Exception e) {
					// TODO: handle exception
					e.printStackTrace();
				}
			}
		}
		return 0;
	}
}

 

    点击下拉更新跳转到具体activity

public class UpdateActivity extends Activity implements OnClickListener {
	Button btn_update, btn_cancel, btn_exit;
	TextView tv_title;
	ProgressBar pb;
	int updateType;
	String updateVersion;
	private String mSavePath;
	private HashMap<String, String> mHashMap;
	private int progress;
	private boolean cancelUpdate;
	Handler mHandler;
	/* 下载中 */
	private static final int DOWNLOAD = 1;
	/* 下载结束 */
	private static final int DOWNLOAD_FINISH = 2;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		// TODO Auto-generated method stub
		super.onCreate(savedInstanceState);
		setContentView(R.layout.update_layout);
		findViews();
		prepareData();
		initViews();
		NotificationManager nm = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
		nm.cancel(R.id.updateId);
	}

	void findViews() {
		btn_update = (Button) findViewById(R.id.btn_update);
		btn_cancel = (Button) findViewById(R.id.btn_cancel);
		btn_exit = (Button) findViewById(R.id.btn_exit);
		tv_title = (TextView) findViewById(R.id.tv_title);
		pb = (ProgressBar) findViewById(R.id.update_progress);
	}

	void prepareData() {
		String[] updateCode = PublicUtil.getSharedValue(this,
				PublicUtil.SYSTEM_SETTINGS, PublicUtil.UPDATECODE, "").split(
				"-");
		updateType = updateCode[0].equals("3")?1:0;
		updateVersion = updateCode[1];
		mHashMap = UpdateManager.mHashMap;
		mHandler = new Handler() {
			public void handleMessage(android.os.Message msg) {
				switch (msg.what) {
				// 正在下载
				case DOWNLOAD:
					// 设置进度条位置
					pb.setProgress(progress);
					break;
				case DOWNLOAD_FINISH:
					// 安装文件
					installApk();
					pb.setVisibility(View.GONE);
					if (updateType == 0)
						finish();
					break;
				default:
					break;
				}
			};
		};
	}

	void initViews() {
		btn_cancel.setVisibility(updateType == 0 ? View.VISIBLE : View.GONE);
		btn_exit.setVisibility(updateType == 1 ? View.VISIBLE : View.GONE);
		tv_title.setText("饭友更新至" + updateVersion + "正式版");
		btn_cancel.setOnClickListener(this);
		btn_update.setOnClickListener(this);
		btn_exit.setOnClickListener(this);
	}

	@Override
	public void onClick(View v) {
		// TODO Auto-generated method stub
		switch (v.getId()) {
		case R.id.btn_cancel:
			cancelUpdate = true;
			finish();
			break;
		case R.id.btn_update:
			pb.setVisibility(View.VISIBLE);
			v.setEnabled(false);
			btn_cancel.setText("取消更新");
			new downloadApkThread().start();
			break;
		case R.id.btn_exit:
			cancelUpdate = true;
			finish();
			if (MoreActivity.activity != null)
				MoreActivity.activity.finish();
			if (HomeTabActivity.activity != null)
				HomeTabActivity.activity.finish();
			break;

		default:
			break;
		}
	}

	private class downloadApkThread extends Thread {
		@Override
		public void run() {
			try {
				// 判断SD卡是否存在，并且是否具有读写权限
				if (Environment.getExternalStorageState().equals(
						Environment.MEDIA_MOUNTED)) {
					// 获得存储卡的路径
					String sdpath = Environment.getExternalStorageDirectory()
							+ "/";
					mSavePath = sdpath + "download";
					URL url = new URL(PublicUtil.getWebRoot()
							+ mHashMap.get("url"));
					// 创建连接
					HttpURLConnection conn = (HttpURLConnection) url
							.openConnection();
					conn.connect();
					// 获取文件大小
					int length = conn.getContentLength();
					// 创建输入流
					InputStream is = conn.getInputStream();

					File file = new File(mSavePath);
					// 判断文件目录是否存在
					if (!file.exists()) {
						file.mkdir();
					}
					File apkFile = new File(mSavePath, mHashMap.get("name"));
					FileOutputStream fos = new FileOutputStream(apkFile);
					int count = 0;
					// 缓存
					byte buf[] = new byte[1024];
					// 写入到文件中
					do {
						int numread = is.read(buf);
						count += numread;
						// 计算进度条位置
						progress = (int) (((float) count / length) * 100);
						// 更新进度
						mHandler.sendEmptyMessage(DOWNLOAD);
						if (numread <= 0) {
							// 下载完成
							mHandler.sendEmptyMessage(DOWNLOAD_FINISH);
							break;
						}
						// 写入文件
						fos.write(buf, 0, numread);
					} while (!cancelUpdate);// 点击取消就停止下载.
					fos.close();
					is.close();
				}
			} catch (MalformedURLException e) {
				e.printStackTrace();
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
	};

	/**
	 * 安装APK文件
	 */
	private void installApk() {
		File apkfile = new File(mSavePath, mHashMap.get("name"));
		if (!apkfile.exists()) {
			return;
		}
		// 通过Intent安装APK文件
		Intent i = new Intent(Intent.ACTION_VIEW);
		i.setDataAndType(Uri.parse("file://" + apkfile.toString()),
				"application/vnd.android.package-archive");
		startActivity(i);
	}

	@Override
	public boolean onKeyDown(int keyCode, KeyEvent event) {
		if (keyCode == event.KEYCODE_BACK) {
			return true;
		}
		return super.onKeyDown(keyCode, event);
	}
}

 更详细方法：http://blog.csdn.net/jj120522/article/details/7948554