android 安装卸载apk

android apk 文件的安装和卸载代码：

都是通过intent 来完成

安装：

String str = "/com.xx.xxx.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.xx.xxx");   
Intent uninstallIntent = new Intent(Intent.ACTION_DELETE, packageURI);   
startActivity(uninstallIntent);

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