Android代码实现安装、卸载、打开

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