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;
    }
}