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： B、《Android CircularFloatingActionMenu在ScrollView这样的滚动View中使用（2）》链接地址：

C、《Android第三方开源FloatingActionButton（com.getbase.floatingactionbutton）【1】》链接地址：

D、《Android第三方开源FloatingActionButton（com.getbase.floatingactionbutton）【2】》链接地址： E、《Android第三方开源FloatingActionButton（com.getbase.floatingactionbutton）: FloatingActionsMenu【3】》链接地址： F、《Android FloatingActionButton: FloatingActionsMenu向下伸展弹出及删除包含的FloatingActionButton【4】》链接地址： G、《Android Material Design的FloatingActionButton，Snackbar和CoordinatorLayout》链接地址： H、《Android第三方FloatingActionButton：伴随ListView、RecyclerView、ScrollView滚动滑入滑出》链接地址：

I，Android CircularFloatingActionMenu在github上的项目主页：