FloatingActionButton&SnackBar

简介

FloatingActionButton：悬浮按钮
SnackBar：屏幕底部快速弹出消息

一段代码

FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
        fab.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                //底部小窗SnackBar
                Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_SHORT)
                        .setAction("执行动作", new View.OnClickListener() {
                            @Override
                            public void onClick(View view) {
                                Toast.makeText(MainActivity.this,"Snackbar 动作",Toast.LENGTH_SHORT).show();
                            }
                        }).show();
            }
        });

<android.support.design.widget.FloatingActionButton
    android:id="@+id/fab"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="bottom|end"
    android:layout_margin="@dimen/fab_margin"
    android:src="@android:drawable/ic_dialog_email"/>