apk下载与安装

 

 

public class MainActivity extends Activity {      private File apkFile;     @Override     protected void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         setContentView(R.layout.activity_main);     }          public void downloadAPK(View v) {         //1). 主线程, 显示提示视图: ProgressDialog         final ProgressDialog dialog = new ProgressDialog(this);         dialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);         dialog.show();                  //准备用于保存APK文件的File对象 : /storage/sdcard/Android/package_name/files/xxx.apk         apkFile = new File(getExternalFilesDir(null), "update.apk");                  //2). 启动分线程, 请求下载APK文件, 下载过程中显示下载进度         new Thread(new Runnable() {                          @Override             public void run() {                 try {                     //1. 得到连接对象                     String path = "http://192.168.10.165:8080/Web_Server/L04_DataStorage.apk";                     URL url = new URL(path);                     HttpURLConnection connection = (HttpURLConnection) url.openConnection();                     //2. 设置                     //connection.setRequestMethod("GET");                     connection.setConnectTimeout(5000);                     connection.setReadTimeout(10000);                     //3. 连接                     connection.connect();                     //4. 请求并得到响应码200                     int responseCode = connection.getResponseCode();                     if(responseCode==200) {                         //设置dialog的最大进度                         dialog.setMax(connection.getContentLength());                                                                           //5. 得到包含APK文件数据的InputStream                         InputStream is = connection.getInputStream();                         //6. 创建指向apkFile的FileOutputStream                         FileOutputStream fos = new FileOutputStream(apkFile);                         //7. 边读边写                         byte[] buffer = new byte[1024];                         int len = -1;                         while((len=is.read(buffer))!=-1) {                             fos.write(buffer, 0, len);                             //8. 显示下载进度                             dialog.incrementProgressBy(len);                                                          //休息一会(模拟网速慢)                             //Thread.sleep(50);                             SystemClock.sleep(50);                         }                                                  fos.close();                         is.close();                     }                     //9. 下载完成, 关闭, 进入3)                     connection.disconnect();                                          //3). 主线程, 移除dialog, 启动安装                     runOnUiThread(new Runnable() {                         @Override                         public void run() {                             dialog.dismiss();                             installAPK();                         }                     });                                      } catch (Exception e) {                     e.printStackTrace();                 }             }         }).start();         //09-05 12:59:20.553: I/ActivityManager(1179): Displayed com.android.packageinstaller/.PackageInstallerActivity: +282ms     }

 

 

    /**      * 启动安装APK      */     private void installAPK() {         Intent intent = new Intent("android.intent.action.INSTALL_PACKAGE");         intent.setDataAndType(Uri.fromFile(apkFile), "application/vnd.android.package-archive");         startActivity(intent);     }

 

原文：https://www.cnblogs.com/znsongshu/p/9346745.html