Android ActionFloatingButton悬浮按钮组件与Snackbar组件使用

1.导入ActionFloatingButton组件(点击下载按钮，安装组件)

2,.ImageView图片XML设置

<ImageView
        android:id="@+id/imageView3"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:scaleType="fitXY"
        app:srcCompat="@mipmap/img1" />

注意：在约束布局(constraintLayout)android:layout_width的赋值有两种：match_parent 和match_constraint

3.ActionFloatingButton组件是悬浮在ImageView之上的

4.java后台代码

public class MainActivity extends AppCompatActivity {
    FloatingActionButton floatingActionButton;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        floatingActionButton=findViewById(R.id.floatingActionButton2);
        floatingActionButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Snackbar.make(v,"snackBar内容显示",Snackbar.LENGTH_SHORT).show();
            }
        });
    }
}