Android悬浮窗Demo源码-悬浮球转盘、悬浮加速小火箭效果、悬浮视频图片播放

package com.crazy.floatwindow.view; import android.content.Context; import android.util.AttributeSet; import android.util.DisplayMetrics; import android.view.LayoutInflater; import android.view.MotionEvent; import android.view.View; import android.view.ViewGroup; import android.view.WindowManager; import android.widget.ImageView; import android.widget.TextView; import com.crazy.floatwindow.R; public class CircleMenuLayout extends ViewGroup { private int mRadius; /** * 该容器内child item的默认尺寸 */ private static final float RADIO_DEFAULT_CHILD_DIMENSION = 1 / 4f; /** * 菜单的中心child的默认尺寸 */ private float RADIO_DEFAULT_CENTERITEM_DIMENSION = 1 / 3f; /** * 该容器的内边距,无视padding属性，如需边距请用该变量 */ private static final float RADIO_PADDING_LAYOUT = 1 / 12f; /** * 当每秒移动角度达到该值时，认为是快速移动 */ private static final int FLINGABLE_VALUE = 300; /** * 如果移动角度达到该值，则屏蔽点击 */ private static final int NOCLICK_VALUE = 3; /** * 当每秒移动角度达到该值时，认为是快速移动 */ private int mFlingableValue = FLINGABLE_VALUE; /** * 该容器的内边距,无视padding属性，如需边距请用该变量 */ private float mPadding; /** * 布局时的开始角度 */ private double mStartAngle = 0; /** * 菜单项的文本 */ private String[] mItemTexts; /** * 菜单项的图标 */ private int[] mItemImgs; /** * 菜单的个数 */ private int mMenuItemCount; /** * 检测按下到抬起时旋转的角度 */ private float mTmpAngle; /** * 检测按下到抬起时使用的时间 */ private long mDownTime; /** * 判断是否正在自动滚动 */ private boolean isFling; private int mMenuItemLayoutId = R.layout.circle_menu_item; public CircleMenuLayout(Context context, AttributeSet attrs) { super(context, attrs); // 无视padding setPadding(0, 0, 0, 0); } /** * 设置布局的宽高，并策略menu item宽高 */ @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { int resWidth = 0; int resHeight = 0; /** * 根据传入的参数，分别获取测量模式和测量值 */ int width = MeasureSpec.getSize(widthMeasureSpec); int widthMode = MeasureSpec.getMode(widthMeasureSpec); int height = MeasureSpec.getSize(heightMeasureSpec); int heightMode = MeasureSpec.getMode(heightMeasureSpec); /** * 如果宽或者高的测量模式非精确值 */ if (widthMode != MeasureSpec.EXACTLY || heightMode != MeasureSpec.EXACTLY) { // 主要设置为背景图的高度 resWidth = getSuggestedMinimumWidth(); // 如果未设置背景图片，则设置为屏幕宽高的默认值 resWidth = resWidth == 0 ? getDefaultWidth() : resWidth; resHeight = getSuggestedMinimumHeight(); // 如果未设置背景图片，则设置为屏幕宽高的默认值 resHeight = resHeight == 0 ? getDefaultWidth() : resHeight; } else { // 如果都设置为精确值，则直接取小值； resWidth = resHeight = Math.min(width, height); } setMeasuredDimension(resWidth, resHeight); // 获得半径 mRadius = Math.max(getMeasuredWidth(), getMeasuredHeight()); // menu item数量 final int count = getChildCount(); // menu item尺寸 int childSize = (int) (mRadius * RADIO_DEFAULT_CHILD_DIMENSION); // menu item测量模式 int childMode = MeasureSpec.EXACTLY; // 迭代测量 for (int i = 0; i < count; i++) { final View child = getChildAt(i); if (child.getVisibility() == GONE) { continue; } // 计算menu item的尺寸；以及和设置好的模式，去对item进行测量 int makeMeasureSpec = -1; if (child.getId() == R.id.id_circle_menu_item_center) { makeMeasureSpec = MeasureSpec.makeMeasureSpec( (int) (mRadius * RADIO_DEFAULT_CENTERITEM_DIMENSION), childMode); } else { makeMeasureSpec = MeasureSpec.makeMeasureSpec(childSize, childMode); } child.measure(makeMeasureSpec, makeMeasureSpec); } mPadding = RADIO_PADDING_LAYOUT * mRadius; } /** * MenuItem的点击事件接口 * * */ public interface OnMenuItemClickListener { void itemClick(View view, int pos); void itemCenterClick(View view); } /** * MenuItem的点击事件接口 */ private OnMenuItemClickListener mOnMenuItemClickListener; /** * 设置MenuItem的点击事件接口 * * @param mOnMenuItemClickListener */ public void setOnMenuItemClickListener( OnMenuItemClickListener mOnMenuItemClickListener) { this.mOnMenuItemClickListener = mOnMenuItemClickListener; } /** * 设置menu item的位置 */ @Override protected void onLayout(boolean changed, int l, int t, int r, int b) { int layoutRadius = mRadius; // Laying out the child views final int childCount = getChildCount(); int left, top; // menu item 的尺寸 int cWidth = (int) (layoutRadius * RADIO_DEFAULT_CHILD_DIMENSION); // 根据menu item的个数，计算角度 float angleDelay = 360 / (getChildCount() - 1); // 遍历去设置menuitem的位置 for (int i = 0; i < childCount; i++) { final View child = getChildAt(i); if (child.getId() == R.id.id_circle_menu_item_center) continue; if (child.getVisibility() == GONE) { continue; } mStartAngle %= 360; // 计算，中心点到menu item中心的距离 float tmp = layoutRadius / 2f - cWidth / 2 - mPadding; // tmp cosa 即menu item中心点的横坐标 left = layoutRadius / 2 + (int) Math.round(tmp * Math.cos(Math.toRadians(mStartAngle)) - 1 / 2f * cWidth); // tmp sina 即menu item的纵坐标 top = layoutRadius / 2 + (int) Math.round(tmp * Math.sin(Math.toRadians(mStartAngle)) - 1 / 2f * cWidth); child.layout(left, top, left + cWidth, top + cWidth); // 叠加尺寸 mStartAngle += angleDelay; } // 找到中心的view，如果存在设置onclick事件 View cView = findViewById(R.id.id_circle_menu_item_center); if (cView != null) { cView.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { if (mOnMenuItemClickListener != null) { mOnMenuItemClickListener.itemCenterClick(v); } } }); // 设置center item位置 int cl = layoutRadius / 2 - cView.getMeasuredWidth() / 2; int cr = cl + cView.getMeasuredWidth(); cView.layout(cl, cl, cr, cr); } } /** * 记录上一次的x，y坐标 */ private float mLastX; private float mLastY; /** * 自动滚动的Runnable */ private AutoFlingRunnable mFlingRunnable; @Override public boolean dispatchTouchEvent(MotionEvent event) { float x = event.getX(); float y = event.getY(); // Log.e("TAG", "x = " + x + " , y = " + y); switch (event.getAction()) { case MotionEvent.ACTION_DOWN: mLastX = x; mLastY = y; mDownTime = System.currentTimeMillis(); mTmpAngle = 0; // 如果当前已经在快速滚动 if (isFling) { // 移除快速滚动的回调 removeCallbacks(mFlingRunnable); isFling = false; return true; } break; case MotionEvent.ACTION_MOVE: /** * 获得开始的角度 */ float start = getAngle(mLastX, mLastY); /** * 获得当前的角度 */ float end = getAngle(x, y); // Log.e("TAG", "start = " + start + " , end =" + end); // 如果是一、四象限，则直接end-start，角度值都是正值 if (getQuadrant(x, y) == 1 || getQuadrant(x, y) == 4) { mStartAngle += end - start; mTmpAngle += end - start; } else // 二、三象限，色角度