代码运行apk文件，程序更新安装

void update()

  {

    Intent localIntent = new Intent("android.intent.action.VIEW");

    Uri localUri = Uri.fromFile(new File("/sdcard/QIYICleint.apk"));

    localIntent.setDataAndType(localUri, "application/vnd.android.package-archive");

    startActivity(localIntent);

    finish();

  }