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：
1import android.app.Service; 2import android.content.Intent; 3import android.os.Binder; 4import android.os.IBinder; 5//import android.util.Log; 6import android.view.View; 7import android.view.WindowManager; 8import android.widget.FrameLayout; 9import android.widget.ImageView; 10//import android.widget.TextView; 11 12import com.oguzdev.circularfloatingactionmenu.library.FloatingActionButton; 13import com.oguzdev.circularfloatingactionmenu.library.FloatingActionMenu; 14import com.oguzdev.circularfloatingactionmenu.library.SubActionButton; 15 16public class SystemOverlayMenuService extends Service { 17 18 private final IBinder mBinder = new LocalBinder(); 19 20 //下方白色+号小按钮 21 private FloatingActionButton rightLowerButton; 22 23 //顶部中心位置的大红色星号按钮 24 private FloatingActionButton topCenterButton; 25 26 private FloatingActionMenu rightLowerMenu; 27 private FloatingActionMenu topCenterMenu; 28 29 private boolean serviceWillBeDismissed; 30 31 public SystemOverlayMenuService() { 32 } 33 34 public class LocalBinder extends Binder { 35 SystemOverlayMenuService getService() { 36 // Return this instance of LocalService so clients can call public methods 37 return SystemOverlayMenuService.this; 38 } 39 } 40 41 @Override 42 public IBinder onBind(Intent intent) { 43 return mBinder; 44 } 45 46 @Override 47 public void onCreate() { 48 super.onCreate(); 49 50 serviceWillBeDismissed = false; 51 52 // Set up the white button on the lower right corner 53 // more or less with default parameter 54 ImageView fabIconNew = new ImageView(this); 55 fabIconNew.setImageDrawable(getResources().getDrawable(R.drawable.ic_action_new_light)); 56 WindowManager.LayoutParams params = FloatingActionButton.Builder.getDefaultSystemWindowParams(this); 57 58 //右边下方小按钮 59 rightLowerButton = new FloatingActionButton.Builder(this) 60 .setContentView(fabIconNew) 61 .setSystemOverlay(true) //使该按钮作为系统悬浮按钮显示在设备屏幕上 62 .setLayoutParams(params) 63 .build(); 64 65 SubActionButton.Builder rLSubBuilder = new SubActionButton.Builder(this); 66 ImageView rlIcon1 = new ImageView(this); 67 ImageView rlIcon2 = new ImageView(this); 68 ImageView rlIcon3 = new ImageView(this); 69 ImageView rlIcon4 = new ImageView(this); 70 71 rlIcon1.setImageDrawable(getResources().getDrawable(R.drawable.ic_action_chat_light)); 72 rlIcon2.setImageDrawable(getResources().getDrawable(R.drawable.ic_action_camera_light)); 73 rlIcon3.setImageDrawable(getResources().getDrawable(R.drawable.ic_action_video_light)); 74 rlIcon4.setImageDrawable(getResources().getDrawable(R.drawable.ic_action_place_light)); 75 76 // Build the menu with default options: light theme, 90 degrees, 72dp radius. 77 // Set 4 default SubActionButtons 78 SubActionButton rlSub1 = rLSubBuilder.setContentView(rlIcon1).build(); 79 SubActionButton rlSub2 = rLSubBuilder.setContentView(rlIcon2).build(); 80 SubActionButton rlSub3 = rLSubBuilder.setContentView(rlIcon3).build(); 81 SubActionButton rlSub4 = rLSubBuilder.setContentView(rlIcon4).build(); 82 rightLowerMenu = new FloatingActionMenu.Builder(this, true) 83 .addSubActionView(rlSub1, rlSub1.getLayoutParams().width, rlSub1.getLayoutParams().height) 84 .addSubActionView(rlSub2, rlSub2.getLayoutParams().width, rlSub2.getLayoutParams().height) 85 .addSubActionView(rlSub3, rlSub3.getLayoutParams().width, rlSub3.getLayoutParams().height) 86 .addSubActionView(rlSub4, rlSub4.getLayoutParams().width, rlSub4.getLayoutParams().height) 87 .setStartAngle(180) 88 .setEndAngle(270) 89 .attachTo(rightLowerButton) 90 .build(); 91 92 93 94 //创建居于设备顶部居中的大红色按钮 95 96 // Set up the large red button on the top center side 97 // With custom button and content sizes and margins 98 int redActionButtonSize = getResources().getDimensionPixelSize(R.dimen.red_action_button_size); 99 int redActionButtonMargin = getResources().getDimensionPixelOffset(R.dimen.action_button_margin); 100 int redActionButtonContentSize = getResources().getDimensionPixelSize(R.dimen.red_action_button_content_size); 101 int redActionButtonContentMargin = getResources().getDimensionPixelSize(R.dimen.red_action_button_content_margin); 102 int redActionMenuRadius = getResources().getDimensionPixelSize(R.dimen.red_action_menu_radius); 103 int blueSubActionButtonSize = getResources().getDimensionPixelSize(R.dimen.blue_sub_action_button_size); 104 int blueSubActionButtonContentMargin = getResources().getDimensionPixelSize(R.dimen.blue_sub_action_button_content_margin); 105 106 ImageView fabIconStar = new ImageView(this); 107 fabIconStar.setImageDrawable(getResources().getDrawable(R.drawable.ic_action_important)); 108 109 FloatingActionButton.LayoutParams fabIconStarParams = new FloatingActionButton.LayoutParams(redActionButtonContentSize, redActionButtonContentSize); 110 fabIconStarParams.setMargins(redActionButtonContentMargin, 111 redActionButtonContentMargin, 112 redActionButtonContentMargin, 113 redActionButtonContentMargin); 114 115 WindowManager.LayoutParams params2 = FloatingActionButton.Builder.getDefaultSystemWindowParams(this); 116 params2.width = redActionButtonSize; 117 params2.height = redActionButtonSize; 118 119 topCenterButton = new FloatingActionButton.Builder(this) 120 .setSystemOverlay(true) 121 .setContentView(fabIconStar, fabIconStarParams) 122 .setBackgroundDrawable(R.drawable.button_action_red_selector) 123 .setPosition(FloatingActionButton.POSITION_TOP_CENTER) //顶部中心位置 124 .setLayoutParams(params2) 125 .build(); 126 127 //为顶部中心位置的大红色按钮增加弹出的子菜单 128 // Set up customized SubActionButtons for the right center menu 129 SubActionButton.Builder tCSubBuilder = new SubActionButton.Builder(this); 130 tCSubBuilder.setBackgroundDrawable(getResources().getDrawable(R.drawable.button_action_blue_selector)); 131 132 //小红色关闭叉子那个按钮Builder 133 SubActionButton.Builder tCRedBuilder = new SubActionButton.Builder(this); 134 tCRedBuilder.setBackgroundDrawable(getResources().getDrawable(R.drawable.button_action_red_selector)); 135 136 FrameLayout.LayoutParams blueContentParams = new FrameLayout.LayoutParams(FrameLayout.LayoutParams.MATCH_PARENT, FrameLayout.LayoutParams.MATCH_PARENT); 137 blueContentParams.setMargins(blueSubActionButtonContentMargin, 138 blueSubActionButtonContentMargin, 139 blueSubActionButtonContentMargin, 140 blueSubActionButtonContentMargin); 141 142 // Set custom layout params 143 FrameLayout.LayoutParams blueParams = new FrameLayout.LayoutParams(blueSubActionButtonSize, blueSubActionButtonSize); 144 tCSubBuilder.setLayoutParams(blueParams); 145 tCRedBuilder.setLayoutParams(blueParams); 146 147 ImageView tcIcon1 = new ImageView(this); 148 ImageView tcIcon2 = new ImageView(this); 149 ImageView tcIcon3 = new ImageView(this); 150 ImageView tcIcon4 = new ImageView(this); 151 ImageView tcIcon5 = new ImageView(this); 152 ImageView tcIcon6 = new ImageView(this); 153 154 tcIcon1.setImageDrawable(getResources().getDrawable(R.drawable.ic_action_camera)); 155 tcIcon2.setImageDrawable(getResources().getDrawable(R.drawable.ic_action_picture)); 156 tcIcon3.setImageDrawable(getResources().getDrawable(R.drawable.ic_action_video)); 157 tcIcon4.setImageDrawable(getResources().getDrawable(R.drawable.ic_action_location_found)); 158 tcIcon5.setImageDrawable(getResources().getDrawable(R.drawable.ic_action_headphones)); 159 tcIcon6.setImageDrawable(getResources().getDrawable(R.drawable.ic_action_cancel)); 160 161 SubActionButton tcSub1 = tCSubBuilder.setContentView(tcIcon1, blueContentParams).build(); 162 SubActionButton tcSub2 = tCSubBuilder.setContentView(tcIcon2, blueContentParams).build(); 163 SubActionButton tcSub3 = tCSubBuilder.setContentView(tcIcon3, blueContentParams).build(); 164 SubActionButton tcSub4 = tCSubBuilder.setContentView(tcIcon4, blueContentParams).build(); 165 SubActionButton tcSub5 = tCSubBuilder.setContentView(tcIcon5, blueContentParams).build(); 166 SubActionButton tcSub6 = tCRedBuilder.setContentView(tcIcon6, blueContentParams).build(); 167 168 169 // Build another menu with custom options 170 topCenterMenu = new FloatingActionMenu.Builder(this, true) 171 .addSubActionView(tcSub1, tcSub1.getLayoutParams().width, tcSub1.getLayoutParams().height) 172 .addSubActionView(tcSub2, tcSub2.getLayoutParams().width, tcSub2.getLayoutParams().height) 173 .addSubActionView(tcSub3, tcSub3.getLayoutParams().width, tcSub3.getLayoutParams().height) 174 .addSubActionView(tcSub4, tcSub4.getLayoutParams().width, tcSub4.getLayoutParams().height) 175 .addSubActionView(tcSub5, tcSub5.getLayoutParams().width, tcSub5.getLayoutParams().height) 176 .addSubActionView(tcSub6, tcSub6.getLayoutParams().width, tcSub6.getLayoutParams().height) 177 .setRadius(redActionMenuRadius) 178 .setStartAngle(0) 179 .setEndAngle(180) 180 .attachTo(topCenterButton) 181 .build(); 182 183 topCenterMenu.setStateChangeListener(new FloatingActionMenu.MenuStateChangeListener() { 184 @Override 185 public void onMenuOpened(FloatingActionMenu menu) { 186 187 } 188 189 @Override 190 public void onMenuClosed(FloatingActionMenu menu) { 191 if(serviceWillBeDismissed) { 192 SystemOverlayMenuService.this.stopSelf(); 193 serviceWillBeDismissed = false; 194 } 195 } 196 }); 197 198 // make the red button terminate the service 199 tcSub6.setOnClickListener(new View.OnClickListener() { 200 @Override 201 public void onClick(View v) { 202 serviceWillBeDismissed = true; // the order is important 203 topCenterMenu.close(true); 204 } 205 }); 206 } 207 208 @Override 209 public void onDestroy() { 210 if(rightLowerMenu != null && rightLowerMenu.isOpen()) rightLowerMenu.close(false); 211 if(topCenterMenu != null && topCenterMenu.isOpen()) topCenterMenu.close(false); 212 if(rightLowerButton != null) rightLowerButton.detach(); 213 if(topCenterButton != null) topCenterButton.detach(); 214 215 super.onDestroy(); 216 } 217}
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