Android APK安装与卸载的代码实现

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).