android版本更新全程解析

版本更新是每个项目必备的功能，思路大概都差不多，首先获取到客户端的版本号与服务器上最新的版本进行比较，如果需要进行更新，则返回下载的链接，进行下载安装，直接上代码：

MainActivity：

package com.home.update;import android.os.Bundle;import android.app.Activity;public class MainActivity extends Activity {@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);UpdateManager um = new UpdateManager(MainActivity.this);um.checkUpdateInfo();}}

版本更新工具类：

package com.home.update;import java.io.BufferedReader;import java.io.File;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import java.net.HttpURLConnection;import java.net.MalformedURLException;import java.net.URL;import org.apache.http.HttpResponse;import org.apache.http.HttpStatus;import org.apache.http.client.ClientProtocolException;import org.apache.http.client.HttpClient;import org.apache.http.client.methods.HttpGet;import org.apache.http.impl.client.DefaultHttpClient;import org.json.JSONException;import org.json.JSONObject;import android.app.AlertDialog;import android.app.Dialog;import android.app.AlertDialog.Builder;import android.content.Context;import android.content.DialogInterface;import android.content.Intent;import android.content.DialogInterface.OnClickListener;import android.content.pm.PackageManager.NameNotFoundException;import android.net.Uri;import android.os.Environment;import android.os.Handler;import android.os.Message;import android.view.LayoutInflater;import android.view.View;import android.view.WindowManager;import android.widget.ProgressBar;public class UpdateManager {private Context context;// 发起版本检测的urlprivate final static String CHECKURL = "http://....";// 服务器返回的apk安装包下载路径private static String downloadUrl = "";private Dialog noticeDialog;private ProgressBar mProgress;private boolean interceptFlag = false;private Dialog downloadDialog;private static final int DOWN_UPDATE = 1;private static final int DOWN_OVER = 2;private int progress;// 下载包安装本地存放路径private static final String savePath = Environment.getExternalStorageDirectory() + "/guyun/update/";private static final String saveFileName = savePath + "sport.apk";public UpdateManager(Context context) {this.context = context;}/** * 更新UI的Handler */private Handler handler = new Handler() {public void handleMessage(Message msg) {switch (msg.what) {case DOWN_UPDATE:mProgress.setProgress(progress);break;case DOWN_OVER:if (downloadDialog != null)downloadDialog.dismiss();installApk();break;default:break;}};};/** * 版本更新接口 */public void checkUpdateInfo() {// 向服务器发出检查请求，如果需要更新则弹出提示对话框if (isNeedUpdate()) {// 显示提示对话框showNoticeDialog();}}/** * 检查当前版本是否需要更新 *  * @return */private boolean isNeedUpdate() {String versionName = getVersionName(context);boolean isNeedUpdate = testVersion(versionName);return isNeedUpdate;}/** * 获取本地版本名称 *  * @param context * @return */private String getVersionName(Context context) {String versionName = "";try {// 包名改为自己应用的包名即可versionName = context.getPackageManager().getPackageInfo("com.home.update", 1).versionName;} catch (NameNotFoundException e) {e.printStackTrace();}return versionName;}/** * 向服务器发起版本检测请求，服务器根据提交的版本参数和服务器上的当前版本进行比较 如果符合更新要求，返回最新版本号和下载URL *  * @param versionName * @return */private boolean testVersion(String version) {boolean isNeedUpdate = false;// 这里的url具体拼装方式应根据服务器需要的格式而定String url = CHECKURL + "?version=" + version;String result = get(url);try {// 这里的具体解析方式应根据自己服务器返回的数据而定JSONObject jsonObj = new JSONObject(result);int code = jsonObj.getInt("code");if (code == 0) {JSONObject valueObj = jsonObj.getJSONObject("value");String lastVersion = valueObj.getString("version");downloadUrl = valueObj.getString("url");if (version.equals(lastVersion)) {isNeedUpdate = false;} else {isNeedUpdate = true;}} else {isNeedUpdate = false;}} catch (JSONException e) {e.printStackTrace();}return isNeedUpdate;}/** * 以get方式发送请求 *  * @param url * @return */private String get(String url) {BufferedReader reader = null;StringBuffer sb = null;String result = "";HttpClient client = new DefaultHttpClient();HttpGet request = new HttpGet(url);request.addHeader("Content-Type", " text/json");try {// 发送请求，得到响应HttpResponse response = client.execute(request);// 如果请求成功if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {reader = new BufferedReader(new InputStreamReader(response.getEntity().getContent()));sb = new StringBuffer();String line = "";while ((line = reader.readLine()) != null) {sb.append(line);}} else if (response.getStatusLine().getStatusCode() == HttpStatus.SC_SERVICE_UNAVAILABLE) {result = "维护或繁忙";}} catch (ClientProtocolException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();} finally {try {if (reader != null) {reader.close();reader = null;}} catch (IOException e) {result = "维护或繁忙";e.printStackTrace();}}if (sb != null) {result = sb.toString();}return result;}/** * 弹出更新提示对话框 */private void showNoticeDialog() {AlertDialog.Builder builder = new Builder(context);builder.setTitle("软件版本更新");builder.setMessage("版本可以更新哦");builder.setPositiveButton("下载", new OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {dialog.dismiss();showDownloadDialog();}});builder.setNegativeButton("以后再说", new OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {dialog.dismiss();}});noticeDialog = builder.create();noticeDialog.show();// 设置弹出对话框大小属性WindowManager.LayoutParams lp = noticeDialog.getWindow().getAttributes();lp.width = 400;lp.height = 500;noticeDialog.getWindow().setAttributes(lp);}/** * 下载进度对话框 */private void showDownloadDialog() {AlertDialog.Builder builder = new Builder(context);builder.setTitle("正在下载，请稍后...");final LayoutInflater inflater = LayoutInflater.from(context);View v = inflater.inflate(R.layout.progress, null);mProgress = (ProgressBar) v.findViewById(R.id.progress);builder.setView(v);builder.setNegativeButton("取消", new OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {dialog.dismiss();interceptFlag = true;}});downloadDialog = builder.create();downloadDialog.show();downloadApk();}/** * 启动线程下载apk */private void downloadApk() {Thread downLoadThread = new Thread(downApkRunnable);downLoadThread.start();}/** * 安装包下载线程 */private Runnable downApkRunnable = new Runnable() {@Overridepublic void run() {try {URL url = new URL(downloadUrl);HttpURLConnection conn = (HttpURLConnection) url.openConnection();conn.connect();int length = conn.getContentLength();InputStream is = conn.getInputStream();File file = new File(savePath);if (!file.exists()) {file.mkdir();}String apkFile = saveFileName;File ApkFile = new File(apkFile);FileOutputStream fos = new FileOutputStream(ApkFile);int count = 0;byte buf[] = new byte[1024];do {int numread = is.read(buf);count += numread;progress = (int) (((float) count / length) * 100);// 更新进度handler.sendEmptyMessage(DOWN_UPDATE);if (numread <= 0) {// 下载完成通知安装handler.sendEmptyMessage(DOWN_OVER);break;}fos.write(buf, 0, numread);} while (!interceptFlag);// 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 */private void installApk() {File apkfile = new File(saveFileName);if (!apkfile.exists()) {return;}Intent i = new Intent(Intent.ACTION_VIEW);i.setDataAndType(Uri.parse("file://" + apkfile.toString()),"application/vnd.android.package-archive");context.startActivity(i);}}

如果是在4.0以上版本，不能在主线程访问网络，部分功能需要作相应调整开启异步子线程。