package com.pingplusplus.demoapp; import android.app.Activity; import android.content.Intent; import android.os.Bundle; import android.view.View; public class MainActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); } public void btnClick(View v){ Class clz = null; switch (v.getId()) { case R.id.client_sdk: clz = ClientSDKActivity.class; break; case R.id.one_sdk: clz = OneSDKActivity.class; break; default: break; } Intent intent = new Intent(MainActivity.this, clz); startActivity(intent); } }