代码怎么实现sd卡中的.apk文件的安装

Question

哪个大神，，指点一下，，，越详细越好，，，，，

Answer 1

File file = new File(("/sdcard/1.apk");
                Util.printLog(Tag, "get file ok~!!!!");
                Uri uri = Uri.fromFile(file);
                Util.printLog(Tag, "get uri ok~!!!!");
                Intent startGameIntent = new Intent(Intent.ACTION_VIEW, uri);
                startGameIntent.setData(uri);
                startGameIntent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
                startGameIntent
                        .setClassName("com.android.packageinstaller",
                                "com.android.packageinstaller.PackageInstallerActivity");
                startActivity(startGameIntent);

Answer 2

Intent i = new Intent(Intent.ACTION_VIEW);
//你的apk路径
String filePath = "/sdcard/XXX.apk";
i.setDataAndType(Uri.parse("file://" + filePath),"application/vnd.android.package-archive");
context.startActivity(i);