FloatingActionButton项目在github上的主页：https://github.com/futuresimple/android-floating-action-button
FloatingActionButton使用简单，而且可以自定义颜色、大小、背景图片
项目构造：
下面是demo的代码（主要见sample）：
布局：
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:fab="http://schemas.android.com/apk/res-auto" android:layout_width="match_parent" android:layout_height="match_parent" android:background="@color/background" > <com.getbase.floatingactionbutton.FloatingActionButton android:id="@+id/pink_icon" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentBottom="true" android:layout_centerHorizontal="true" android:layout_marginBottom="dp" fab:fab_colorNormal="@color/pink" fab:fab_colorPressed="@color/pink_pressed" fab:fab_icon="@drawable/ic_fab_star" /> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_above="@id/pink_icon" android:layout_centerHorizontal="true" android:layout_marginBottom="dp" android:text="Text below button" /> <com.getbase.floatingactionbutton.AddFloatingActionButton android:id="@+id/semi_transparent" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_above="@id/pink_icon" android:layout_centerHorizontal="true" android:layout_marginBottom="dp" fab:fab_colorNormal="@color/blue_semi_transparent" fab:fab_colorPressed="@color/blue_semi_transparent_pressed" fab:fab_plusIconColor="@color/white" /> <com.getbase.floatingactionbutton.FloatingActionButton android:id="@+id/setter" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_above="@id/semi_transparent" android:layout_centerHorizontal="true" android:layout_marginBottom="dp" /> <com.getbase.floatingactionbutton.AddFloatingActionButton android:id="@+id/normal_plus" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentBottom="true" android:layout_alignParentLeft="true" android:layout_alignParentStart="true" android:layout_marginBottom="dp" android:layout_marginLeft="dp" android:layout_marginStart="dp" fab:fab_colorNormal="@color/white" fab:fab_colorPressed="@color/white_pressed" fab:fab_plusIconColor="@color/half_black" /> <com.getbase.floatingactionbutton.FloatingActionsMenu android:id="@+id/right_labels" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_above="@id/normal_plus" android:layout_alignParentLeft="true" android:layout_alignParentStart="true" android:layout_marginLeft="dp" android:layout_marginStart="dp" fab:fab_addButtonColorNormal="@color/white" fab:fab_addButtonColorPressed="@color/white_pressed" fab:fab_addButtonPlusIconColor="@color/half_black" fab:fab_addButtonSize="mini" fab:fab_labelStyle="@style/menu_labels_style" fab:fab_labelsPosition="right" > <com.getbase.floatingactionbutton.FloatingActionButton android:layout_width="wrap_content" android:layout_height="wrap_content" fab:fab_colorNormal="@color/white" fab:fab_colorPressed="@color/white_pressed" fab:fab_title="Label on the right" /> <com.getbase.floatingactionbutton.FloatingActionButton android:layout_width="wrap_content" android:layout_height="wrap_content" fab:fab_colorNormal="@color/white" fab:fab_colorPressed="@color/white_pressed" fab:fab_size="mini" fab:fab_title="Another one on the right" /> </com.getbase.floatingactionbutton.FloatingActionsMenu> <com.getbase.floatingactionbutton.FloatingActionsMenu android:id="@+id/multiple_actions" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentBottom="true" android:layout_alignParentEnd="true" android:layout_alignParentRight="true" android:layout_marginBottom="dp" android:layout_marginEnd="dp" android:layout_marginRight="dp" fab:fab_addButtonColorNormal="@color/white" fab:fab_addButtonColorPressed="@color/white_pressed" fab:fab_addButtonPlusIconColor="@color/half_black" fab:fab_labelStyle="@style/menu_labels_style" > <com.getbase.floatingactionbutton.FloatingActionButton android:id="@+id/action_a" android:layout_width="wrap_content" android:layout_height="wrap_content" fab:fab_colorNormal="@color/white" fab:fab_colorPressed="@color/white_pressed" fab:fab_title="Action A" /> <com.getbase.floatingactionbutton.FloatingActionButton android:id="@+id/action_b" android:layout_width="wrap_content" android:layout_height="wrap_content" fab:fab_colorNormal="@color/white" fab:fab_colorPressed="@color/white_pressed" fab:fab_title="Action with a very long name that won't fit on the screen" /> </com.getbase.floatingactionbutton.FloatingActionsMenu> <com.getbase.floatingactionbutton.FloatingActionsMenu android:id="@+id/multiple_actions_down" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentEnd="true" android:layout_alignParentRight="true" android:layout_alignParentTop="true" android:layout_marginEnd="dp" android:layout_marginRight="dp" android:layout_marginTop="dp" fab:fab_addButtonColorNormal="@color/white" fab:fab_addButtonColorPressed="@color/white_pressed" fab:fab_addButtonPlusIconColor="@color/half_black" fab:fab_addButtonSize="mini" fab:fab_expandDirection="down" fab:fab_labelStyle="@style/menu_labels_style" > <com.getbase.floatingactionbutton.FloatingActionButton android:layout_width="wrap_content" android:layout_height="wrap_content" fab:fab_colorNormal="@color/white" fab:fab_colorPressed="@color/white_pressed" fab:fab_size="mini" /> <com.getbase.floatingactionbutton.FloatingActionButton android:id="@+id/button_remove" android:layout_width="wrap_content" android:layout_height="wrap_content" fab:fab_colorNormal="@color/white" fab:fab_colorPressed="@color/white_pressed" fab:fab_title="Click to remove" /> <com.getbase.floatingactionbutton.FloatingActionButton android:id="@+id/button_gone" android:layout_width="wrap_content" android:layout_height="wrap_content" fab:fab_colorNormal="@color/white" fab:fab_colorPressed="@color/white_pressed" /> <com.getbase.floatingactionbutton.FloatingActionButton android:id="@+id/action_enable" android:layout_width="wrap_content" android:layout_height="wrap_content" fab:fab_colorNormal="@color/white" fab:fab_colorPressed="@color/white_pressed" fab:fab_title="Set bottom menu enabled/disabled" /> </com.getbase.floatingactionbutton.FloatingActionsMenu> <com.getbase.floatingactionbutton.FloatingActionsMenu android:id="@+id/multiple_actions_left" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentTop="true" android:layout_marginEnd="dp" android:layout_marginRight="dp" android:layout_marginTop="dp" android:layout_toLeftOf="@+id/multiple_actions_down" android:layout_toStartOf="@+id/multiple_actions_down" fab:fab_addButtonColorNormal="@color/white" fab:fab_addButtonColorPressed="@color/white_pressed" fab:fab_addButtonPlusIconColor="@color/half_black" fab:fab_addButtonSize="mini" fab:fab_addButtonStrokeVisible="false" fab:fab_expandDirection="left" > <com.getbase.floatingactionbutton.FloatingActionButton android:layout_width="wrap_content" android:layout_height="wrap_content" fab:fab_colorNormal="@color/white" fab:fab_colorPressed="@color/white_pressed" /> <com.getbase.floatingactionbutton.FloatingActionButton android:layout_width="wrap_content" android:layout_height="wrap_content" fab:fab_colorNormal="@color/white" fab:fab_colorPressed="@color/white_pressed" fab:fab_size="mini" /> <com.getbase.floatingactionbutton.FloatingActionButton android:layout_width="wrap_content" android:layout_height="wrap_content" android:visibility="gone" fab:fab_colorNormal="@color/white" fab:fab_colorPressed="@color/white_pressed" fab:fab_size="mini" /> </com.getbase.floatingactionbutton.FloatingActionsMenu> <com.getbase.floatingactionbutton.FloatingActionButton android:id="@+id/setter_drawable" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_above="@id/setter" android:layout_centerHorizontal="true" /> </RelativeLayout> JAVA代码： package com.getbase.floatingactionbutton.sample; import com.getbase.floatingactionbutton.FloatingActionButton; import com.getbase.floatingactionbutton.FloatingActionsMenu; import android.app.Activity; import android.graphics.drawable.ShapeDrawable; import android.graphics.drawable.shapes.OvalShape; import android.os.Bundle; import android.view.View; import android.view.View.OnClickListener; import android.widget.Toast; public class MainActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); findViewById(R.id.pink_icon).setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { Toast.makeText(MainActivity.this, "Clicked pink Floating Action Button", Toast.LENGTH_SHORT).show(); } }); FloatingActionButton button = (FloatingActionButton) findViewById(R.id.setter); button.setSize(FloatingActionButton.SIZE_MINI); button.setColorNormalResId(R.color.pink); button.setColorPressedResId(R.color.pink_pressed); button.setIcon(R.drawable.ic_fab_star); button.setStrokeVisible(false); final View actionB = findViewById(R.id.action_b); FloatingActionButton actionC = new FloatingActionButton(getBaseContext()); actionC.setTitle("Hide/Show Action above"); actionC.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { actionB.setVisibility(actionB.getVisibility() == View.GONE ? View.VISIBLE : View.GONE); } }); final FloatingActionsMenu menuMultipleActions = (FloatingActionsMenu) findViewById(R.id.multiple_actions); menuMultipleActions.addButton(actionC); final FloatingActionButton removeAction = (FloatingActionButton) findViewById(R.id.button_remove); removeAction.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { ((FloatingActionsMenu) findViewById(R.id.multiple_actions_down)).removeButton(removeAction); } }); ShapeDrawable drawable = new ShapeDrawable(new OvalShape()); drawable.getPaint().setColor(getResources().getColor(R.color.white)); ((FloatingActionButton) findViewById(R.id.setter_drawable)).setIconDrawable(drawable); final FloatingActionButton actionA = (FloatingActionButton) findViewById(R.id.action_a); actionA.setOnClickListener(new OnClickListener() { @Override public void onClick(View view) { actionA.setTitle("Action A clicked"); } }); // Test that FAMs containing FABs with visibility GONE do not cause crashes findViewById(R.id.button_gone).setVisibility(View.GONE); final FloatingActionButton actionEnable = (FloatingActionButton) findViewById(R.id.action_enable); actionEnable.setOnClickListener(new OnClickListener() { @Override public void onClick(View view) { menuMultipleActions.setEnabled(!menuMultipleActions.isEnabled()); } }); FloatingActionsMenu rightLabels = (FloatingActionsMenu) findViewById(R.id.right_labels); FloatingActionButton addedOnce = new FloatingActionButton(this); addedOnce.setTitle("Added once"); rightLabels.addButton(addedOnce); FloatingActionButton addedTwice = new FloatingActionButton(this); addedTwice.setTitle("Added twice"); rightLabels.addButton(addedTwice); rightLabels.removeButton(addedTwice); rightLabels.addButton(addedTwice); } }
colors：
<"1.0" encoding="utf-8"?> <resources> <color name="black_semi_transparent">#B2000000</color> <color name="background">#e5e5e5</color> <color name="half_black">#808080</color> <color name="white">#fafafa</color> <color name="white_pressed">#f1f1f1</color> <color name="pink">#e91e63</color> <color name="pink_pressed">#ec407a</color> <color name="blue_semi_transparent">#805677fc</color> <color name="blue_semi_transparent_pressed">#80738ffe</color> </resources>
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