Android中实现版本更新（二）自定义更新

项目结构

在MainActivity

<span style="font-size:18px;"><span style="font-size:18px;">public class MainActivity extends Activity {    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        new UpdateManager(this).checkUpdate();    }}</span></span>

UpdateManager中

<span style="font-size:18px;"><span style="font-size:18px;">package com.jikexueyuan.autoupdate;import java.io.File;import java.io.FileOutputStream;import java.io.InputStream;import java.net.HttpURLConnection;import java.net.URL;import org.apache.http.protocol.ResponseConnControl;import org.json.JSONObject;import com.android.volley.RequestQueue;import com.android.volley.Response;import com.android.volley.Response.Listener;import com.android.volley.VolleyError;import com.android.volley.toolbox.JsonObjectRequest;import com.android.volley.toolbox.Volley;import android.R.integer;import android.app.AlertDialog;import android.app.AlertDialog.Builder;import android.app.Dialog;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.widget.ProgressBar;import android.widget.Toast;public class UpdateManager {private ProgressBar mProgressBar;private Dialog mDownloadDialog;private String mSavePath;private int mProgress;private boolean mIsCancel = false;private static final int DOWNLOADING = 1;private static final int DOWNLOAD_FINISH = 2;private static final String PATH = "http://172.31.27.82/autoupdate/version.html";private String mVersion_code;private String mVersion_name;private String mVersion_desc;private String mVersion_path;private Context mContext;public UpdateManager(Context context) {mContext = context;}private Handler mGetVersionHandler = new Handler(){public void handleMessage(Message msg) {JSONObject jsonObject = (JSONObject) msg.obj;System.out.println(jsonObject.toString());try {mVersion_code = jsonObject.getString("version_code");mVersion_name = jsonObject.getString("version_name");mVersion_desc = jsonObject.getString("version_desc");mVersion_path = jsonObject.getString("version_path");if (isUpdate()){Toast.makeText(mContext, "需要更新", Toast.LENGTH_SHORT).show();// 显示提示更新对话框showNoticeDialog();} else{Toast.makeText(mContext, "已是最新版本", Toast.LENGTH_SHORT).show();}} catch (Exception e){e.printStackTrace();}};};private Handler mUpdateProgressHandler = new Handler(){public void handleMessage(Message msg) {switch (msg.what){case DOWNLOADING:// 设置进度条mProgressBar.setProgress(mProgress);break;case DOWNLOAD_FINISH:// 隐藏当前下载对话框mDownloadDialog.dismiss();// 安装 APK 文件installAPK();}};};/* * 检测软件是否需要更新 */public void checkUpdate() {RequestQueue requestQueue = Volley.newRequestQueue(mContext);JsonObjectRequest request = new JsonObjectRequest(PATH, null, new Listener<JSONObject>() {@Overridepublic void onResponse(JSONObject jsonObject) {Message msg = Message.obtain();msg.obj = jsonObject;mGetVersionHandler.sendMessage(msg);}}, new Response.ErrorListener() {@Overridepublic void onErrorResponse(VolleyError arg0) {System.out.println(arg0.toString());}});requestQueue.add(request);}/* * 与本地版本比较判断是否需要更新 */protected boolean isUpdate() {int serverVersion = Integer.parseInt(mVersion_code);int localVersion = 1;try {localVersion = mContext.getPackageManager().getPackageInfo("com.jikexueyuan.autoupdate", 0).versionCode;} catch (NameNotFoundException e) {e.printStackTrace();}if (serverVersion > localVersion)return true;elsereturn false;}/* * 有更新时显示提示对话框 */protected void showNoticeDialog() {AlertDialog.Builder builder = new Builder(mContext);builder.setTitle("提示");String message = "软件有更新，要下载安装吗？\n" + mVersion_desc;builder.setMessage(message);builder.setPositiveButton("更新", new OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {// 隐藏当前对话框dialog.dismiss();// 显示下载对话框showDownloadDialog();}});builder.setNegativeButton("下次再说", new OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {// 隐藏当前对话框dialog.dismiss();}});builder.create().show();}/* * 显示正在下载对话框 */protected void showDownloadDialog() {AlertDialog.Builder builder = new Builder(mContext);builder.setTitle("下载中");View view = LayoutInflater.from(mContext).inflate(R.layout.dialog_progress, null);mProgressBar = (ProgressBar) view.findViewById(R.id.id_progress);builder.setView(view);builder.setNegativeButton("取消", new OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {// 隐藏当前对话框dialog.dismiss();// 设置下载状态为取消mIsCancel = true;}});mDownloadDialog = builder.create();mDownloadDialog.show();// 下载文件downloadAPK();}/* * 开启新线程下载文件 */private void downloadAPK() {new Thread(new Runnable() {@Overridepublic void run() {try{if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)){String sdPath = Environment.getExternalStorageDirectory() + "/";mSavePath = sdPath + "jikedownload";File dir = new File(mSavePath);if (!dir.exists())dir.mkdir();// 下载文件HttpURLConnection conn = (HttpURLConnection) new URL(mVersion_path).openConnection();conn.connect();InputStream is = conn.getInputStream();int length = conn.getContentLength();File apkFile = new File(mSavePath, mVersion_name);FileOutputStream fos = new FileOutputStream(apkFile);int count = 0;byte[] buffer = new byte[1024];while (!mIsCancel){int numread = is.read(buffer);count += numread;// 计算进度条的当前位置mProgress = (int) (((float)count/length) * 100);// 更新进度条mUpdateProgressHandler.sendEmptyMessage(DOWNLOADING);// 下载完成if (numread < 0){mUpdateProgressHandler.sendEmptyMessage(DOWNLOAD_FINISH);break;}fos.write(buffer, 0, numread);}fos.close();is.close();}}catch(Exception e){e.printStackTrace();}}}).start();}/* * 下载到本地后执行安装 */protected void installAPK() {File apkFile = new File(mSavePath, mVersion_name);if (!apkFile.exists())return;Intent intent = new Intent(Intent.ACTION_VIEW);Uri uri = Uri.parse("file://" + apkFile.toString());intent.setDataAndType(uri, "application/vnd.android.package-archive");mContext.startActivity(intent);}}</span></span>

AndroidManifest.xml

  <uses-permission android:name="android.permission.INTERNET"/>

源码下载：http://download.csdn.net/detail/zhaihaohao1/8913041

参考视频：http://www.jikexueyuan.com/course/1607.html