1.MD 库中的一个浮动按钮
<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:onClick=
"fabClick"
app:backgroundTint=
"@android:color/holo_blue_dark"
app:srcCompat=
"@mipmap/icon_serch" />
FloatingActionButton fab = (FloatingActionButton) findViewById(R
.id.fab)
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