@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main_layout);

        Button btn=(Button)findViewById(R.id.button1);
        btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                Intent intent=new Intent(MainActivity.this,Main2LayoutActivity.class);
                startActivity(intent);

            }
        });
    }

   @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main_layout);

        Button btn=(Button)findViewById(R.id.button1);
        btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                Intent intent=new Intent("com.example.myAction");
                intent.addCategory("android.intent.category.DEFAULT");
                startActivity(intent);

            }
        });
    }

   <activity android:name=".Main2LayoutActivity">
            <intent-filter>
                <action android:name="com.example.myAction"></action>
                <category android:name="android.intent.category.DEFAULT"></category>
            </intent-filter>
        </activity>