package net.micode.notes.ui; import android.app.Activity; import android.os.Bundle; import android.support.annotation.Nullable; import android.view.View; import android.widget.Button; import net.micode.notes.R; public class AppLockActivity extends Activity { @Override protected void onCreate(@Nullable Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.app_lock); Button button1 = findViewById(R.id.app_lock_button1); button1.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { finish(); } }); } @Override public void onBackPressed() { } }