Try out this:
In xml file:
<com.google.android.gms.common.SignInButton
android:id="@+id/sign_in_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:layout_marginBottom="92dp" >
</com.google.android.gms.common.SignInButton>
</RelativeLayout>
In your activity get that button:
@Override
public void onCreate(Bundle pBundle) {
super.onCreate(pBundle);
setContentView(R.layout.dashboard);
findViewById(R.id.sign_in_button).setOnClickListener(new OnClickListener() {
@Override
public void onClick
(View v) {
Intent i = new Intent(getApplicationContext(),YourActivity.class);
startActivity(i);
}
});
}