android 添加按钮+event

麻雀小，五脏全

xml

 <android.support.design.widget.FloatingActionButton
        android:id="@+id/fuck_button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="bottom|right"
        android:layout_margin="16dp"
        android:backgroundTint="#222"
        android:clickable="true"
        android:src="@mipmap/ic_launcher"
        app:layout_anchor="@id/rvToDoList"
        app:layout_anchorGravity="bottom|right|end"
        app:rippleColor="#fff" />

java
click event

//find button by id
 FloatingActionButton btn = (FloatingActionButton) findViewById(R.id.fuck_button);
//register add click
 btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                System.out.println(v);
            }
        });