自定义悬浮按钮：FloatingButton

floating_button_layout.xml

 <?xml version="1.0" encoding="utf-8"?>
 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="match_parent" >

     <ImageButton
         android:id="@+id/ImageButton_Floating"
         android:layout_width="50dp"
         android:layout_height="50dp"
         android:layout_alignParentBottom="true"
         android:layout_alignParentRight="true"
         android:layout_marginBottom="15dp"
         android:layout_marginRight="15dp"
         android:background="@drawable/floating_button_style"
         android:contentDescription="@null" >
     </ImageButton>

 </RelativeLayout>

floating_menu.xml

 <?xml version="1.0" encoding="utf-8"?>
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:orientation="vertical" >

     <Button
         android:id="@+id/Button1"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:text="选项1" />

     <Button
         android:id="@+id/Button2"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:text="选项2" />

     <Button
         android:id="@+id/Button3"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:text="选项3" />

     <Button
         android:id="@+id/Button4"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:text="选项4" />

 </LinearLayout>

FloatingMenu.java

 package com.wangzhen.view;

 import com.wangzhen.animation.R;

 import android.content.Context;
 import android.graphics.drawable.ColorDrawable;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.View.OnClickListener;
 import android.view.WindowManager.LayoutParams;
 import android.widget.Button;
 import android.widget.PopupWindow;
 import android.widget.Toast;

 /**
  * 漂浮菜单
  *
  * @author Administrator
  *
  */
 public class FloatingMenu extends PopupWindow {

     private Context mContext;
     private View view;
     private Button Button1;
     private Button Button2;
     private Button Button3;
     private Button Button4;

     public FloatingMenu(Context context) {
         mContext = context;
         LayoutInflater mInflater = LayoutInflater.from(mContext);
         view = mInflater.inflate(R.layout.floating_menu, null);
         Button1 = (Button) view.findViewById(R.id.Button1);
         Button2 = (Button) view.findViewById(R.id.Button2);
         Button3 = (Button) view.findViewById(R.id.Button3);
         Button4 = (Button) view.findViewById(R.id.Button4);

         Button1.setOnClickListener(new MyClick());
         Button2.setOnClickListener(new MyClick());
         Button3.setOnClickListener(new MyClick());
         Button4.setOnClickListener(new MyClick());

         setWidth(300);
         setHeight(LayoutParams.WRAP_CONTENT);
         setFocusable(true);
         ColorDrawable drawable = new ColorDrawable(0xb000000);
         setBackgroundDrawable(drawable);
         setContentView(view);
     }

     private void ShowToast(String string) {
         Toast.makeText(mContext, string, Toast.LENGTH_SHORT).show();
     }

     class MyClick implements OnClickListener {

         @Override
         public void onClick(View v) {
             switch (v.getId()) {
             case R.id.Button1:
                 ShowToast("Button1");
                 break;
             case R.id.Button2:
                 ShowToast("Button2");
                 break;
             case R.id.Button3:
                 ShowToast("Button3");
                 break;
             case R.id.Button4:
                 ShowToast("Button4");
                 break;
             default:
                 break;
             }
             dismiss();
         }

     }
 }

FloatingButtonActivity.java

 package com.wangzhen.animation;

 import com.lidroid.xutils.ViewUtils;
 import com.lidroid.xutils.view.annotation.ContentView;
 import com.lidroid.xutils.view.annotation.ViewInject;
 import com.lidroid.xutils.view.annotation.event.OnClick;
 import com.wangzhen.view.FloatingMenu;
 import android.content.Context;
 import android.os.Bundle;
 import android.support.v7.app.ActionBar;
 import android.support.v7.app.ActionBarActivity;
 import android.view.Gravity;
 import android.view.KeyEvent;
 import android.view.MenuItem;
 import android.view.View;
 import android.widget.ImageButton;

 @ContentView(R.layout.floating_button_layout)
 public class FloatingButtonActivity extends ActionBarActivity {

     private Context mContext;

     @ViewInject(R.id.ImageButton_Floating)
     private ImageButton ImageButton_Floating;

     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         ViewUtils.inject(this);
         mContext = this;
         ActionBar mActionBar = getSupportActionBar();
         mActionBar.setDisplayHomeAsUpEnabled(true);
         mActionBar.setDisplayShowHomeEnabled(false);
     }

     @OnClick({ R.id.ImageButton_Floating })
     private void OnClick(View view) {
         switch (view.getId()) {
         case R.id.ImageButton_Floating:
             FloatingMenu menu = new FloatingMenu(mContext);
             menu.setFocusable(true);
             menu.setOutsideTouchable(true);
             View view_btn = findViewById(R.id.ImageButton_Floating);
             menu.showAtLocation(view_btn, Gravity.BOTTOM | Gravity.RIGHT, 0,
                     view_btn.getHeight() + 30);
             break;

         default:
             break;
         }
     }

     @Override
     public boolean onOptionsItemSelected(MenuItem item) {
         switch (item.getItemId()) {
         case android.R.id.home:
             FinishActivity();
             break;

         default:
             break;
         }
         return super.onOptionsItemSelected(item);
     }

     /**
      * 退出Activity
      */
     private void FinishActivity() {
         finish();
         overridePendingTransition(0, R.anim.anim_page_out);
     }

     @Override
     public boolean onKeyDown(int keyCode, KeyEvent event) {
         if (keyCode == KeyEvent.KEYCODE_BACK) {
             FinishActivity();
         }
         return false;
     }
 }