直播网站源码可拖拽悬浮球，仿Assistive Touch弹出窗口

悬浮球 android自带的FloatingActionButton没有拖拽功能，因此可以给它加上这个功能。 直接上代码：

public class DragFloatActionButton extends FloatingActionButton{ private int parentHeight; private int parentWidth; public DragFloatActionButton(Context context) { super(context); } public DragFloatActionButton(Context context, AttributeSet attrs) { super(context, attrs); } public DragFloatActionButton(Context context, AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); } private int lastX; private int lastY; private boolean isDrag; @Override public boolean onTouchEvent(MotionEvent event) { int rawX = (int) event.getRawX(); int rawY = (int) event.getRawY(); switch (event.getAction() & MotionEvent.ACTION_MASK) { case MotionEvent.ACTION_DOWN: setPressed(true); isDrag=false; getParent().requestDisallowInterceptTouchEvent(true); lastX=rawX; lastY=rawY; ViewGroup parent; if(getParent()!=null){ parent= (ViewGroup) getParent(); parentHeight=parent.getHeight(); parentWidth=parent.getWidth(); } break; case MotionEvent.ACTION_MOVE: if(parentHeight<=0||parentWidth==0){ isDrag=false; break; }else { isDrag=true; } int dx=rawX-lastX; int dy=rawY-lastY; //这里修复一些华为手机无法触发点击事件 int distance= (int) Math.sqrt(dx*dx+dy*dy); if(distance==0){ isDrag=false; break; } float x=getX()+dx; float y=getY()+dy; //检测是否到达边缘 左上右下 x=x<0?0:x>parentWidth-getWidth()?parentWidth-getWidth():x; y=getY()<0?0:getY()+getHeight()>parentHeight?parentHeight-getHeight():y; setX(x); setY(y); lastX=rawX; lastY=rawY; Log.i("aa","isDrag="+isDrag+"getX="+getX()+";getY="+getY()+";parentWidth="+parentWidth); break; case MotionEvent.ACTION_UP: if(!isNotDrag()){ //恢复按压效果 setPressed(false); //Log.i("getX="+getX()+"；screenWidthHalf="+screenWidthHalf); if(rawX>=parentWidth/2){ //靠右吸附 animate().setInterpolator(new DecelerateInterpolator()) .setDuration(500) .xBy(parentWidth-getWidth()-getX()) .start(); }else { //靠左吸附 ObjectAnimator oa=ObjectAnimator.ofFloat(this,"x",getX(),0); oa.setInterpolator(new DecelerateInterpolator()); oa.setDuration(500); oa.start(); } } break; } //如果是拖拽则消s耗事件，否则正常传递即可。 return !isNotDrag() || super.onTouchEvent(event); } private boolean isNotDrag(){ return !isDrag&&(getX()==0 ||(getX()==parentWidth-getWidth())); } }

layout中使用DragFloatActionButton

<DragFloatActionButton android:id="@+id/floatBall" android:layout_width="wrap_content" android:layout_height="wrap_content" app:backgroundTint="@drawable/fab" --->正常背景颜色，默认使用colorAccent的颜色 app:rippleColor="#ffffff" --->按下时背景颜色 app:elevation="6dp" --->正常阴影大小 app:pressedTranslationZ="12dp" --->按下时阴影大小 app:borderWidth="0dp" --->边框大小 app:fabCustomSize="60dp" --->fab大小 app:maxImageSize="50dp" --->src图片的大小 android:src="@drawable/circle" android:clickable="true" --->点击效果 app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintLeft_toLeftOf="parent" app:layout_constraintRight_toRightOf="parent" app:layout_constraintTop_toTopOf="parent"/>

最重要的事情！！！一定要给DragFloatActionButton设置点击事件，否则不能拖拽！ 完整代码：

public class MainActivity extends AppCompatActivity implements View.OnClickListener { //悬浮球 private DragFloatActionButton floatBall; //弹窗 private PopupWindow popup; //弹窗菜单View private View menuView; //菜单上面的组件 private TextView menuTime; private TextView menuPhone; private TextView menuAirCondition; private TextView menuLight; private TextView menuAir; private TextView menuITPower; private TextView menuMusic; private TextView menuLog; private TextView menuSetting; private TextView menuMain; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); initView(); } //初始化view private void initView() { floatBall = findViewById(R.id.floatBall); menuView = LayoutInflater.from(this).inflate(R.layout.float_menu, null); menuTime = menuView.findViewById(R.id.menu_time); menuPhone = menuView.findViewById(R.id.menu_phone); menuAirCondition = menuView.findViewById(R.id.menu_airCondition); menuLight = menuView.findViewById(R.id.menu_lighting); menuAir = menuView.findViewById(R.id.menu_air); menuITPower = menuView.findViewById(R.id.menu_power); menuMusic = menuView.findViewById(R.id.menu_music); menuLog = menuView.findViewById(R.id.menu_log); menuSetting = menuView.findViewById(R.id.menu_setting); menuMain = menuView.findViewById(R.id.menu_main); menuTime.setOnClickListener(this); menuPhone.setOnClickListener(this); menuAirCondition.setOnClickListener(this); menuLight.setOnClickListener(this); menuAir.setOnClickListener(this); menuITPower.setOnClickListener(this); menuMusic.setOnClickListener(this); menuLog.setOnClickListener(this); menuSetting.setOnClickListener(this); menuMain.setOnClickListener(this); floatBall.setOnClickListener(this); } //显示View private void showView() { DisplayMetrics dm = getResources().getDisplayMetrics(); popup = new PopupWindow(menuView, (int) (dm.widthPixels * 0.7), (int) (dm.heightPixels * 0.5)); Drawable transpent = new ColorDrawable(Color.TRANSPARENT); popup.setBackgroundDrawable(transpent); popup.setFocusable(true); popup.setOutsideTouchable(true); popup.showAtLocation(floatBall, Gravity.CENTER, 0, 0); popup.update(); } @Override public void onClick(View v) { switch (v.getId()) { case R.id.floatBall: showView(); break; default: break; } } }

浮动菜单窗口透明化

android:alpha="0.8"