Android程序使用代码的安装和卸载

Android程序使用代码的安装和卸载！！！ 

安装：

 String str = "/CanavaCancel.apk"; String fileName = Environment.getExternalStorageDirectory() + str; Intent intent = new Intent(Intent.ACTION_VIEW); intent.setDataAndType(Uri.fromFile(new File(fileName)), "application/vnd.android.package-archive"); startActivity(intent);

卸载：

Uri packageURI = Uri.parse("package:com.demo.CanavaCancel"); Intent uninstallIntent = new Intent(Intent.ACTION_DELETE, packageURI); startActivity(uninstallIntent);

Environment拥有一些可以获取环境变量的方法 

package:com.demo.CanavaCancel 这个形式是 package:程序完整的路径 (包名+程序名).

//下载apk程序代码
protected File downLoadFile(String httpUrl) { final String fileName = "updata.apk"; File tmpFile = new File("/sdcard/update"); if (!tmpFile.exists()) { tmpFile.mkdir(); } final File file = new File("/sdcard/update/" + fileName); try { URL url = new URL(httpUrl); try { HttpURLConnection conn = (HttpURLConnection) url.openConnection(); InputStream is = conn.getInputStream(); FileOutputStream fos = new FileOutputStream(file); byte[] buf = new byte[256]; conn.connect(); double count = 0; if (conn.getResponseCode() >= 400) { Toast.makeText(Main.this, "连接超时", Toast.LENGTH_SHORT).show(); } else { while (count <= 100) { if (is != null) { int numRead = is.read(buf); if (numRead <= 0) { break; } else { fos.write(buf, 0, numRead); } } else { break; } } } conn.disconnect(); fos.close(); is.close(); } catch (IOException e) { e.printStackTrace(); } } catch (MalformedURLException e) { e.printStackTrace(); } return file; }

 

 
//打开APK程序代码
private void openFile(File file) { // TODO Auto-generated method stub Log.e("OpenFile", file.getName()); Intent intent = new Intent(); intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); intent.setAction(android.content.Intent.ACTION_VIEW); intent.setDataAndType(Uri.fromFile(file),"application/vnd.android.package-archive"); startActivity(intent); }