创建一个新类，名为UpdateManager，代码如下：
1 import java.io.BufferedReader; 2 import java.io.File; 3 import java.io.FileOutputStream; 4 import java.io.IOException; 5 import java.io.InputStream; 6 import java.io.InputStreamReader; 7 import java.net.HttpURLConnection; 8 import java.net.MalformedURLException; 9 import java.net.URL; 10 import com.af.mobile.R; 11 import android.app.AlertDialog; 12 import android.app.Dialog; 13 import android.app.AlertDialog.Builder; 14 import android.content.Context; 15 import android.content.DialogInterface; 16 import android.content.Intent; 17 import android.content.DialogInterface.OnClickListener; 18 import android.content.pm.PackageManager.NameNotFoundException; 19 import android.net.Uri; 20 import android.os.Environment; 21 import android.os.Handler; 22 import android.os.Message; 23 import android.view.LayoutInflater; 24 import android.view.View; 25 import android.widget.ProgressBar; 26 import android.widget.Toast; 27 28 29 public class UpdateManager 30 {private URL url=null; 31 /* 下载中 */ 32 private static final int DOWNLOAD = 1; 33 /* 下载结束 */ 34 private static final int DOWNLOAD_FINISH = 2; 35 /* 保存解析的XML信息 */ 36 //HashMap<String, String> mHashMap; 37 /* 下载保存路径 */ 38 private String mSavePath; 39 /* 记录进度条数量 */ 40 private int progress; 41 /* 是否取消更新 */ 42 private boolean cancelUpdate = false; 43 44 private Context mContext; 45 /* 更新进度条 */ 46 private ProgressBar mProgress; 47 private Dialog mDownloadDialog; 48 49 private Handler mHandler = new Handler() 50 { 51 public void handleMessage(Message msg) 52 { 53 switch (msg.what) 54 { 55 // 正在下载 56 case DOWNLOAD: 57 // 设置进度条位置 58 mProgress.setProgress(progress); 59 break; 60 case DOWNLOAD_FINISH: 61 // 安装文件 62 installApk(); 63 break; 64 default: 65 break; 66 } 67 }; 68 }; 69 70 public UpdateManager(Context context) 71 { 72 this.mContext = context; 73 } 74 75 public void checkUpdate() 76 { 77 if (isUpdate()) 78 { 79 showNoticeDialog(); 80 } else 81 { 82 83 } 84 } 85 86 /** 87 * 检查软件是否有更新版本 88 * 89 * @return 90 */ 91 private boolean isUpdate() 92 { 93 // 获取当前软件版本 94 Double versionCode = getVersionCode(mContext); 95 96 Double serviceCode = 1.2; 97 // 版本判断 98 if (serviceCode > versionCode) 99 { 100 return true; 101 } 102 103 return false; 104 } 105 106 // 获取软件版本号 107 108 private Double getVersionCode(Context context) 109 { 110 Double versionCode = 0.0; 111 try 112 { 113 // 获取软件版本号，对应AndroidManifest.xml下android:versionCode 114 versionCode = (double) context.getPackageManager().getPackageInfo("com.af.mobile", 0).versionCode; 115 } catch (NameNotFoundException e) 116 { 117 e.printStackTrace(); 118 } 119 return versionCode; 120 } 121 122 123 //显示软件更新对话框 124 125 private void showNoticeDialog() 126 { 127 AlertDialog.Builder builder = new Builder(mContext); 128 builder.setTitle("软件更新"); 129 String string=download("http://192.168.0.102:9313/daojuserver/uploads/version.xml");//xml的下载地址 130 builder.setMessage(string); 131 132 builder.setPositiveButton("更新", new OnClickListener() 133 { 134 @Override 135 public void onClick(DialogInterface dialog, int which) 136 { 137 dialog.dismiss(); 138 // 显示下载对话框 139 showDownloadDialog(); 140 } 141 }); 142 // 稍后更新 143 builder.setNegativeButton("稍后更新", new OnClickListener() 144 { 145 @Override 146 public void onClick(DialogInterface dialog, int which) 147 { 148 dialog.dismiss(); 149 } 150 }); 151 Dialog noticeDialog = builder.create(); 152 noticeDialog.show(); 153 } 154 155 // 显示软件下载对话框 156 157 private void showDownloadDialog() 158 { 159 // 构造软件下载对话框 160 AlertDialog.Builder builder = new Builder(mContext); 161 builder.setTitle("djfkjd");//提示信息内容 162 // 给下载对话框增加进度条 163 final LayoutInflater inflater = LayoutInflater.from(mContext); 164 View v = inflater.inflate(R.layout.softupdate_progress, null); 165 mProgress = (ProgressBar) v.findViewById(R.id.update_progress); 166 builder.setView(v); 167 // 取消更新 168 builder.setNegativeButton("取消更新", new OnClickListener() 169 { 170 @Override 171 public void onClick(DialogInterface dialog, int which) 172 { 173 dialog.dismiss(); 174 // 设置取消状态 175 cancelUpdate = true; 176 } 177 }); 178 mDownloadDialog = builder.create(); 179 mDownloadDialog.show(); 180 // 现在文件 181 downloadApk(); 182 } 183 184 185 private void downloadApk() 186 { 187 // 启动新线程下载软件 188 new downloadApkThread().start(); 189 } 190 191 private class downloadApkThread extends Thread 192 { 193 @Override 194 public void run() 195 { 196 try 197 { 198 // 判断SD卡是否存在，并且是否具有读写权限 199 if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) 200 { 201 // 获得存储卡的路径 202 String sdpath = Environment.getExternalStorageDirectory() + "/"; 203 mSavePath = sdpath + "download"; 204 URL url = new URL("http://192.168.0.102:9313/daojuserver/uploads/SpMobile.apk");//apk下载地址地址 205 // 创建连接 206 HttpURLConnection conn = (HttpURLConnection) url.openConnection(); 207 conn.connect(); 208 // 获取文件大小 209 int length = conn.getContentLength(); 210 // 创建输入流 211 InputStream is = conn.getInputStream(); 212 213 File file = new File(mSavePath); 214 if (!file.exists()) 215 { 216 file.mkdir(); 217 } 218 File apkFile = new File(mSavePath, "dhfudh"); 219 FileOutputStream fos = new FileOutputStream(apkFile); 220 int count = 0; 221 // 缓存 222 byte buf[] = new byte[1024]; 223 // 写入到文件中 224 do 225 { 226 int numread = is.read(buf); 227 count += numread; 228 // 计算进度条位置 229 progress = (int) (((float) count / length) * 100); 230 // 更新进度 231 mHandler.sendEmptyMessage(DOWNLOAD); 232 if (numread <= 0) 233 { 234 mHandler.sendEmptyMessage(DOWNLOAD_FINISH); 235 break; 236 } 237 fos.write(buf, 0, numread); 238 } while (!cancelUpdate); 239 fos.close(); 240 is.close(); 241 } 242 } catch (MalformedURLException e) 243 { 244 e.printStackTrace(); 245 } catch (IOException e) 246 { 247 e.printStackTrace(); 248 } 249 // 取消下载对话框显示 250 mDownloadDialog.dismiss(); 251 } 252 }; 253 254 private void installApk() 255 { 256 File apkfile = new File(mSavePath, "dhfudh"); 257 if (!apkfile.exists()) 258 { 259 return; 260 } 261 // 通过Intent安装APK文件 262 Intent i = new Intent(Intent.ACTION_VIEW); 263 i.setDataAndType(Uri.parse("file://" + apkfile.toString()), "application/vnd.android.package-archive"); 264 mContext.startActivity(i); 265 } 266 public String download(String urlString) 267 { 268 StringBuffer sbBuffer=new StringBuffer(); 269 String line=null; 270 BufferedReader buffer=null; 271 try { 272 url=new URL(urlString); 273 HttpURLConnection urlConn=(HttpURLConnection) url.openConnection(); 274 buffer=new BufferedReader(new InputStreamReader(urlConn.getInputStream())); 275 while((line=buffer.readLine())!=null) 276 { 277 sbBuffer.append(line); 278 } 279 } catch (Exception e) { 280 // TODO: handle exception 281 e.printStackTrace(); 282 } 283 finally 284 { 285 try { 286 buffer.close(); 287 } catch (Exception e2) { 288 // TODO: handle exception 289 e2.printStackTrace(); 290 } 291 } 292 return sbBuffer.toString(); 293 } 294 }
在Android应用程序Main界面
1 if(isOpenNetwork())//判断是否有网络 2 { 3 UpdateManager manager = new UpdateManager(Main.this); 4 // 检查软件更新 5 manager.checkUpdate(); 6 7 }
判断移动端是否有网络
isOpenNetwork
1 private boolean isOpenNetwork() { 2 ConnectivityManager connManager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE); 3 NetworkInfo networkInfo = connManager.getActiveNetworkInfo(); 4 5 if (networkInfo != null) { 6 // 2.获取当前网络连接的类型信息 7 int networkType = networkInfo.getType(); 8 if (ConnectivityManager.TYPE_WIFI == networkType) { 9 // 当前为wifi网络 10 } else if (ConnectivityManager.TYPE_MOBILE == networkType) { 11 // 当前为mobile网络 12 } 13 return connManager.getActiveNetworkInfo().isAvailable(); 14 } 15 16 return false; 17 }