Android CircularFloatingActionMenu：作为系统级按钮悬浮桌面弹出菜单使用（3）

Android CircularFloatingActionMenu另外一个不同寻常的地方是，Android CircularFloatingActionMenu可以写在服务Service里面，然后通过上层一个Activity启动这个服务，然后就可以作为Android系统级悬浮按钮悬浮在系统的桌面上使用，这在一些常见的安全软件中很常见，比如，一些安全软件常驻桌面，为用户实时提供流量监控等等这些数据检测或者开关按钮。
现在使用Android CircularFloatingActionMenu实现该功能。
Java代码，其实这里只是写一个后台Service即可，该Service将被其他组件调用：

import android.app.Service;
import android.content.Intent;
import android.os.Binder;
import android.os.IBinder;
//import android.util.Log;
import android.view.View;
import android.view.WindowManager;
import android.widget.FrameLayout;
import android.widget.ImageView;
//import android.widget.TextView;

import com.oguzdev.circularfloatingactionmenu.library.FloatingActionButton;
import com.oguzdev.circularfloatingactionmenu.library.FloatingActionMenu;
import com.oguzdev.circularfloatingactionmenu.library.SubActionButton;

public class SystemOverlayMenuService extends Service {

    private final IBinder mBinder = new LocalBinder();

    //下方白色+号小按钮
    private FloatingActionButton rightLowerButton;
    
    //顶部中心位置的大红色星号按钮
    private FloatingActionButton topCenterButton;

    private FloatingActionMenu rightLowerMenu;
    private FloatingActionMenu topCenterMenu;

    private boolean serviceWillBeDismissed;

    public SystemOverlayMenuService() {
    }

    public class LocalBinder extends Binder {
        SystemOverlayMenuService getService() {
            // Return this instance of LocalService so clients can call public methods
            return SystemOverlayMenuService.this;
        }
    }

    @Override
    public IBinder onBind(Intent intent) {
        return mBinder;
    }

    @Override
    public void onCreate() {
        super.onCreate();

        serviceWillBeDismissed = false;

        // Set up the white button on the lower right corner
        // more or less with default parameter
        ImageView fabIconNew = new ImageView(this);
        fabIconNew.setImageDrawable(getResources().getDrawable(R.drawable.ic_action_new_light));
        WindowManager.LayoutParams params = FloatingActionButton.Builder.getDefaultSystemWindowParams(this);

        //右边下方小按钮
        rightLowerButton = new FloatingActionButton.Builder(this)
                .setContentView(fabIconNew)
                .setSystemOverlay(true) //使该按钮作为系统悬浮按钮显示在设备屏幕上
                .setLayoutParams(params)
                .build();

        SubActionButton.Builder rLSubBuilder = new SubActionButton.Builder(this);
        ImageView rlIcon1 = new ImageView(this);
        ImageView rlIcon2 = new ImageView(this);
        ImageView rlIcon3 = new ImageView(this);
        ImageView rlIcon4 = new ImageView(this);

        rlIcon1.setImageDrawable(getResources().getDrawable(R.drawable.ic_action_chat_light));
        rlIcon2.setImageDrawable(getResources().getDrawable(R.drawable.ic_action_camera_light));
        rlIcon3.setImageDrawable(getResources().getDrawable(R.drawable.ic_action_video_light));
        rlIcon4.setImageDrawable(getResources().getDrawable(R.drawable.ic_action_place_light));

        // Build the menu with default options: light theme, 90 degrees, 72dp radius.
        // Set 4 default SubActionButtons
        SubActionButton rlSub1 = rLSubBuilder.setContentView(rlIcon1).build();
        SubActionButton rlSub2 = rLSubBuilder.setContentView(rlIcon2).build();
        SubActionButton rlSub3 = rLSubBuilder.setContentView(rlIcon3).build();
        SubActionButton rlSub4 = rLSubBuilder.setContentView(rlIcon4).build();
        rightLowerMenu = new FloatingActionMenu.Builder(this, true)
                .addSubActionView(rlSub1, rlSub1.getLayoutParams().width, rlSub1.getLayoutParams().height)
                .addSubActionView(rlSub2, rlSub2.getLayoutParams().width, rlSub2.getLayoutParams().height)
                .addSubActionView(rlSub3, rlSub3.getLayoutParams().width, rlSub3.getLayoutParams().height)
                .addSubActionView(rlSub4, rlSub4.getLayoutParams().width, rlSub4.getLayoutParams().height)
                .setStartAngle(180)
                .setEndAngle(270)
                .attachTo(rightLowerButton)
                .build();

        
        
        //创建居于设备顶部居中的大红色按钮
        
        // Set up the large red button on the top center side
        // With custom button and content sizes and margins
        int redActionButtonSize = getResources().getDimensionPixelSize(R.dimen.red_action_button_size);
        int redActionButtonMargin = getResources().getDimensionPixelOffset(R.dimen.action_button_margin);
        int redActionButtonContentSize = getResources().getDimensionPixelSize(R.dimen.red_action_button_content_size);
        int redActionButtonContentMargin = getResources().getDimensionPixelSize(R.dimen.red_action_button_content_margin);
        int redActionMenuRadius = getResources().getDimensionPixelSize(R.dimen.red_action_menu_radius);
        int blueSubActionButtonSize = getResources().getDimensionPixelSize(R.dimen.blue_sub_action_button_size);
        int blueSubActionButtonContentMargin = getResources().getDimensionPixelSize(R.dimen.blue_sub_action_button_content_margin);

        ImageView fabIconStar = new ImageView(this);
        fabIconStar.setImageDrawable(getResources().getDrawable(R.drawable.ic_action_important));

        FloatingActionButton.LayoutParams fabIconStarParams = new FloatingActionButton.LayoutParams(redActionButtonContentSize, redActionButtonContentSize);
        fabIconStarParams.setMargins(redActionButtonContentMargin,
                redActionButtonContentMargin,
                redActionButtonContentMargin,
                redActionButtonContentMargin);

        WindowManager.LayoutParams params2 = FloatingActionButton.Builder.getDefaultSystemWindowParams(this);
        params2.width = redActionButtonSize;
        params2.height = redActionButtonSize;

        topCenterButton = new FloatingActionButton.Builder(this)
                .setSystemOverlay(true)
                .setContentView(fabIconStar, fabIconStarParams)
                .setBackgroundDrawable(R.drawable.button_action_red_selector)
                .setPosition(FloatingActionButton.POSITION_TOP_CENTER) //顶部中心位置
                .setLayoutParams(params2)
                .build();

        //为顶部中心位置的大红色按钮增加弹出的子菜单
        // Set up customized SubActionButtons for the right center menu
        SubActionButton.Builder tCSubBuilder = new SubActionButton.Builder(this);
        tCSubBuilder.setBackgroundDrawable(getResources().getDrawable(R.drawable.button_action_blue_selector));

        //小红色关闭叉子那个按钮Builder
        SubActionButton.Builder tCRedBuilder = new SubActionButton.Builder(this);
        tCRedBuilder.setBackgroundDrawable(getResources().getDrawable(R.drawable.button_action_red_selector));

        FrameLayout.LayoutParams blueContentParams = new FrameLayout.LayoutParams(FrameLayout.LayoutParams.MATCH_PARENT, FrameLayout.LayoutParams.MATCH_PARENT);
        blueContentParams.setMargins(blueSubActionButtonContentMargin,
                blueSubActionButtonContentMargin,
                blueSubActionButtonContentMargin,
                blueSubActionButtonContentMargin);

        // Set custom layout params
        FrameLayout.LayoutParams blueParams = new FrameLayout.LayoutParams(blueSubActionButtonSize, blueSubActionButtonSize);
        tCSubBuilder.setLayoutParams(blueParams);
        tCRedBuilder.setLayoutParams(blueParams);

        ImageView tcIcon1 = new ImageView(this);
        ImageView tcIcon2 = new ImageView(this);
        ImageView tcIcon3 = new ImageView(this);
        ImageView tcIcon4 = new ImageView(this);
        ImageView tcIcon5 = new ImageView(this);
        ImageView tcIcon6 = new ImageView(this);

        tcIcon1.setImageDrawable(getResources().getDrawable(R.drawable.ic_action_camera));
        tcIcon2.setImageDrawable(getResources().getDrawable(R.drawable.ic_action_picture));
        tcIcon3.setImageDrawable(getResources().getDrawable(R.drawable.ic_action_video));
        tcIcon4.setImageDrawable(getResources().getDrawable(R.drawable.ic_action_location_found));
        tcIcon5.setImageDrawable(getResources().getDrawable(R.drawable.ic_action_headphones));
        tcIcon6.setImageDrawable(getResources().getDrawable(R.drawable.ic_action_cancel));

        SubActionButton tcSub1 = tCSubBuilder.setContentView(tcIcon1, blueContentParams).build();
        SubActionButton tcSub2 = tCSubBuilder.setContentView(tcIcon2, blueContentParams).build();
        SubActionButton tcSub3 = tCSubBuilder.setContentView(tcIcon3, blueContentParams).build();
        SubActionButton tcSub4 = tCSubBuilder.setContentView(tcIcon4, blueContentParams).build();
        SubActionButton tcSub5 = tCSubBuilder.setContentView(tcIcon5, blueContentParams).build();
        SubActionButton tcSub6 = tCRedBuilder.setContentView(tcIcon6, blueContentParams).build();


        // Build another menu with custom options
        topCenterMenu = new FloatingActionMenu.Builder(this, true)
                .addSubActionView(tcSub1, tcSub1.getLayoutParams().width, tcSub1.getLayoutParams().height)
                .addSubActionView(tcSub2, tcSub2.getLayoutParams().width, tcSub2.getLayoutParams().height)
                .addSubActionView(tcSub3, tcSub3.getLayoutParams().width, tcSub3.getLayoutParams().height)
                .addSubActionView(tcSub4, tcSub4.getLayoutParams().width, tcSub4.getLayoutParams().height)
                .addSubActionView(tcSub5, tcSub5.getLayoutParams().width, tcSub5.getLayoutParams().height)
                .addSubActionView(tcSub6, tcSub6.getLayoutParams().width, tcSub6.getLayoutParams().height)
                .setRadius(redActionMenuRadius)
                .setStartAngle(0)
                .setEndAngle(180)
                .attachTo(topCenterButton)
                .build();

        topCenterMenu.setStateChangeListener(new FloatingActionMenu.MenuStateChangeListener() {
            @Override
            public void onMenuOpened(FloatingActionMenu menu) {

            }

            @Override
            public void onMenuClosed(FloatingActionMenu menu) {
                if(serviceWillBeDismissed) {
                    SystemOverlayMenuService.this.stopSelf();
                    serviceWillBeDismissed = false;
                }
            }
        });

        // make the red button terminate the service
        tcSub6.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                serviceWillBeDismissed = true; // the order is important
                topCenterMenu.close(true);
            }
        });
    }

    @Override
    public void onDestroy() {
        if(rightLowerMenu != null && rightLowerMenu.isOpen()) rightLowerMenu.close(false);
        if(topCenterMenu != null && topCenterMenu.isOpen()) topCenterMenu.close(false);
        if(rightLowerButton != null) rightLowerButton.detach();
        if(topCenterButton != null) topCenterButton.detach();

        super.onDestroy();
    }
}

代码运行效果（作为Service启动），此时Activity已经退出，但Service启动后的这两个按钮一直常驻设备桌面，如动图展示：

代码中涉及到的更多自定义属性可以在该项目的代码包里具体查看。

附录相关文章：
A、《Android CircularFloatingActionMenu （1）》链接地址：http://blog.csdn.net/zhangphil/article/details/50257149
B、《Android CircularFloatingActionMenu在ScrollView这样的滚动View中使用（2）》链接地址：http://blog.csdn.net/zhangphil/article/details/50270271

C、《Android第三方开源FloatingActionButton（com.getbase.floatingactionbutton）【1】》链接地址：http://blog.csdn.net/zhangphil/article/details/50166715
D、《Android第三方开源FloatingActionButton（com.getbase.floatingactionbutton）【2】》链接地址：http://blog.csdn.net/zhangphil/article/details/50166929
E、《Android第三方开源FloatingActionButton（com.getbase.floatingactionbutton）: FloatingActionsMenu【3】》链接地址：http://blog.csdn.net/zhangphil/article/details/50167609
F、《Android FloatingActionButton: FloatingActionsMenu向下伸展弹出及删除包含的FloatingActionButton【4】》链接地址：http://blog.csdn.net/zhangphil/article/details/50182019
G、《Android Material Design的FloatingActionButton，Snackbar和CoordinatorLayout》链接地址：http://blog.csdn.net/zhangphil/article/details/48861371
H、《Android第三方FloatingActionButton：伴随ListView、RecyclerView、ScrollView滚动滑入滑出》链接地址：http://blog.csdn.net/zhangphil/article/details/50135707

I，Android CircularFloatingActionMenu在github上的项目主页：https://github.com/oguzbilgener/CircularFloatingActionMenu