android 从服务器上载更新新版本软件 demo
android 从服务器下载更新新版本软件 demo
下面介绍的是apk如何进行版本的检测及下载更新!
最终效果:
更新前:
更新提示:
下载后提示安装:
安装更新后:
由于版本的更新及下载都是通过网络从服务端上获取的,所以需要一个服务端。
新建一个服务端 updateApkServer,在这里该服务端没有特殊用途,只用来提供版本信息而已。其项目结构图:
所有的版本信息记录在 version.xml
<?xml version="1.0" encoding="UTF-8"?> <update> <version>2.0_20120530</version> <versionCode>2</versionCode> <updateTime>2012-05-30</updateTime> <apkName>安卓_02_20120530.apk</apkName> <downloadURL>http://localhost:8080/updateApkServer/sems.apk</downloadURL> <displayMessage>新版本发布,赶紧下载吧 ## 1.新增A功能 ## 2.新增B功能## 3.新增C功能</displayMessage> </update>
服务端上有个updateApkDemo2.apk,其实就是把下面的客户端改了下内容和名称把它扔了进来,只是为了个demo下载演示而已。
OK,服务端就这样了。
下面是android端。
客户端项目结构图:
UpdateApkDemoActivity.java
package com.royal.updateApk; import android.app.Activity; import android.os.Bundle; /** * 更新视图界面类 * * @author Royal * */ public class UpdateApkDemoActivity extends Activity { /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); // 版本更新检查 UpdateManager um = new UpdateManager(UpdateApkDemoActivity.this); um.checkUpdate(); } }
一个比较重要的版本更新核心服务类,靠他了。
UpdateManager.java
package com.royal.updateApk; import java.io.File; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.net.HttpURLConnection; import java.net.MalformedURLException; import java.net.URL; import android.app.AlertDialog.Builder; import android.content.Context; import android.content.DialogInterface; import android.content.DialogInterface.OnClickListener; import android.content.Intent; import android.content.pm.PackageInfo; import android.content.pm.PackageManager; 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 com.royal.model.VersionInfo; import com.royal.util.XMLParserUtil; /** * APK更新管理类 * * @author Royal * */ public class UpdateManager { // 上下文对象 private Context mContext; //更新版本信息对象 private VersionInfo info = null; // 下载进度条 private ProgressBar progressBar; // 是否终止下载 private boolean isInterceptDownload = false; //进度条显示数值 private int progress = 0; /** * 参数为Context(上下文activity)的构造函数 * * @param context */ public UpdateManager(Context context) { this.mContext = context; } public void checkUpdate() { // 从服务端获取版本信息 info = getVersionInfoFromServer(); if (info != null) { try { // 获取当前软件包信息 PackageInfo pi = mContext.getPackageManager().getPackageInfo(mContext.getPackageName(), PackageManager.GET_CONFIGURATIONS); // 当前软件版本号 int versionCode = pi.versionCode; if (versionCode < info.getVersionCode()) { // 如果当前版本号小于服务端版本号,则弹出提示更新对话框 showUpdateDialog(); } } catch (NameNotFoundException e) { e.printStackTrace(); } } } /** * 从服务端获取版本信息 * * @return */ private VersionInfo getVersionInfoFromServer() { VersionInfo info = null; URL url = null; try { // 10.0.2.2相当于localhost url = new URL("http://10.0.2.2:8080/updateApkServer/version.xml"); } catch (MalformedURLException e) { e.printStackTrace(); } if (url != null) { try { // 使用HttpURLConnection打开连接 HttpURLConnection urlConn = (HttpURLConnection) url.openConnection(); // 读取服务端version.xml的内容(流) info = XMLParserUtil.getUpdateInfo(urlConn.getInputStream()); urlConn.disconnect(); } catch (IOException e) { e.printStackTrace(); } } return info; } /** * 提示更新对话框 * * @param info * 版本信息对象 */ private void showUpdateDialog() { Builder builder = new Builder(mContext); builder.setTitle("版本更新"); builder.setMessage(info.getDisplayMessage()); builder.setPositiveButton("下载", new OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { dialog.dismiss(); // 弹出下载框 showDownloadDialog(); } }); builder.setNegativeButton("以后再说", new OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { dialog.dismiss(); } }); builder.create().show(); } /** * 弹出下载框 */ private void showDownloadDialog() { Builder builder = new Builder(mContext); builder.setTitle("版本更新中..."); final LayoutInflater inflater = LayoutInflater.from(mContext); View v = inflater.inflate(R.layout.update_progress, null); progressBar = (ProgressBar) v.findViewById(R.id.pb_update_progress); builder.setView(v); builder.setNegativeButton("取消", new OnClickListener() { public void onClick(DialogInterface dialog, int which) { dialog.dismiss(); //终止下载 isInterceptDownload = true; } }); builder.create().show(); //下载apk downloadApk(); } /** * 下载apk */ private void downloadApk(){ //开启另一线程下载 Thread downLoadThread = new Thread(downApkRunnable); downLoadThread.start(); } /** * 从服务器下载新版apk的线程 */ private Runnable downApkRunnable = new Runnable(){ @Override public void run() { if (!android.os.Environment.getExternalStorageState().equals(android.os.Environment.MEDIA_MOUNTED)) { //如果没有SD卡 Builder builder = new Builder(mContext); builder.setTitle("提示"); builder.setMessage("当前设备无SD卡,数据无法下载"); builder.setPositiveButton("确定", new OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { dialog.dismiss(); } }); builder.show(); return; }else{ try { //服务器上新版apk地址 URL url = new URL("http://10.0.2.2:8080/updateApkServer/updateApkDemo2.apk"); HttpURLConnection conn = (HttpURLConnection)url.openConnection(); conn.connect(); int length = conn.getContentLength(); InputStream is = conn.getInputStream(); File file = new File(Environment.getExternalStorageDirectory().getAbsolutePath() + "/updateApkFile/"); if(!file.exists()){ //如果文件夹不存在,则创建 file.mkdir(); } //下载服务器中新版本软件(写文件) String apkFile = Environment.getExternalStorageDirectory().getAbsolutePath() + "/updateApkFile/" + info.getApkName(); 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; //更新进度条 progress = (int) (((float) count / length) * 100); handler.sendEmptyMessage(1); if(numRead <= 0){ //下载完成通知安装 handler.sendEmptyMessage(0); break; } fos.write(buf,0,numRead); //当点击取消时,则停止下载 }while(!isInterceptDownload); } catch (MalformedURLException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } } } }; /** * 声明一个handler来跟进进度条 */ private Handler handler = new Handler() { public void handleMessage(Message msg) { switch (msg.what) { case 1: // 更新进度情况 progressBar.setProgress(progress); break; case 0: progressBar.setVisibility(View.INVISIBLE); // 安装apk文件 installApk(); break; default: break; } }; }; /** * 安装apk */ private void installApk() { // 获取当前sdcard存储路径 File apkfile = new File(Environment.getExternalStorageDirectory().getAbsolutePath() + "/updateApkFile/" + info.getApkName()); if (!apkfile.exists()) { return; } Intent i = new Intent(Intent.ACTION_VIEW); // 安装,如果签名不一致,可能出现程序未安装提示 i.setDataAndType(Uri.fromFile(new File(apkfile.getAbsolutePath())), "application/vnd.android.package-archive"); mContext.startActivity(i); } }
update_prgress.xml 用于显示下载时的进度条
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="wrap_content" > <ProgressBar android:id="@+id/pb_update_progress" style="?android:attr/progressBarStyleHorizontal" android:layout_width="fill_parent" android:layout_height="wrap_content" /> </LinearLayout>
另外附上2个类,pojo、util
VersionInfo.java
package com.royal.model; /** * 软件版本信息对象 * * @author Royal * */ public class VersionInfo { // 版本描述字符串 private String version; // 版本更新时间 private String updateTime; // 新版本更新下载地址 private String downloadURL; // 更新描述信息 private String displayMessage; // 版本号 private int versionCode; // apk名称 private String apkName; public String getVersion() { return version; } public void setVersion(String version) { this.version = version; } public String getUpdateTime() { return updateTime; } public void setUpdateTime(String updateTime) { this.updateTime = updateTime; } public String getDownloadURL() { return downloadURL; } public void setDownloadURL(String downloadURL) { this.downloadURL = downloadURL; } public String getDisplayMessage() { return displayMessage; } public void setDisplayMessage(String displayMessage) { this.displayMessage = displayMessage; } public int getVersionCode() { return versionCode; } public void setVersionCode(int versionCode) { this.versionCode = versionCode; } public String getApkName() { return apkName; } public void setApkName(String apkName) { this.apkName = apkName; } }
XMLParserUtil.java 就是用来解析服务端 version.xml 用的
package com.royal.util; import java.io.IOException; import java.io.InputStream; import org.xmlpull.v1.XmlPullParser; import org.xmlpull.v1.XmlPullParserException; import org.xmlpull.v1.XmlPullParserFactory; import com.royal.model.VersionInfo; /** * XML文档解析工具类 * * @author Royal * */ public class XMLParserUtil { /** * 获取版本更新信息 * * @param is * 读取连接服务version.xml文档的输入流 * @return */ public static VersionInfo getUpdateInfo(InputStream is) { VersionInfo info = new VersionInfo(); try { XmlPullParserFactory factory = XmlPullParserFactory.newInstance(); factory.setNamespaceAware(true); XmlPullParser parser = factory.newPullParser(); parser.setInput(is, "UTF-8"); int eventType = parser.getEventType(); while (eventType != XmlPullParser.END_DOCUMENT) { switch (eventType) { case XmlPullParser.START_TAG: if ("version".equals(parser.getName())) { info.setVersion(parser.nextText()); } else if ("updateTime".equals(parser.getName())) { info.setUpdateTime(parser.nextText()); } else if ("updateTime".equals(parser.getName())) { info.setUpdateTime(parser.nextText()); } else if ("downloadURL".equals(parser.getName())) { info.setDownloadURL(parser.nextText()); } else if ("displayMessage".equals(parser.getName())) { info.setDisplayMessage(parseTxtFormat(parser.nextText(), "##")); } else if ("apkName".equals(parser.getName())) { info.setApkName(parser.nextText()); } else if ("versionCode".equals(parser.getName())) { info.setVersionCode(Integer.parseInt(parser.nextText())); } break; case XmlPullParser.END_TAG: break; } eventType = parser.next(); } } catch (XmlPullParserException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } return info; } /** * 根据指定字符格式化字符串(换行) * * @param data * 需要格式化的字符串 * @param formatChar * 指定格式化字符 * @return */ public static String parseTxtFormat(String data, String formatChar) { StringBuffer backData = new StringBuffer(); String[] txts = data.split(formatChar); for (int i = 0; i < txts.length; i++) { backData.append(txts[i]); backData.append("\n"); } return backData.toString(); } }
最后一个别忘了开启网络权限和SD卡读写权限。
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.royal.updateApk" android:versionCode="1" android:versionName="1.0" > <uses-sdk android:minSdkVersion="8" /> <application android:icon="@drawable/ic_launcher" android:label="@string/app_name" > <activity android:name=".UpdateApkDemoActivity" android:label="@string/app_name" > <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application> <!-- 开启网络权限 --> <uses-permission android:name="android.permission.INTERNET" /> <!-- 在SDCard中创建与删除文件权限 --> <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS" /> <!-- 往SDCard写入数据权限 --> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> </manifest>