Java tutorial
//package com.java2s; import android.content.*; import android.net.*; public class Main { public static void startAttention(Context context, String s) { Intent intent = new Intent(); intent.setAction("android.intent.action.VIEW"); intent.setData(Uri.parse(s)); intent.setClassName("com.tencent.mm", "com.tencent.mm.ui.qrcode.GetQRCodeInfoUI"); context.startActivity(intent); } }