一個通用的popupWindow，加了一個自適應彈出 PopupWindow的方法，根據popupContentView高度來判斷向上還是向下，請忽略動畫效果的錯覺，好多方向用的都是同一個動畫效果，動畫效果根據實際情況自行添加。。。
/**
* created by Da Peng at 2019/11/4
*/
public class MyPopupWindow extends PopupWindow {
private View view, popupView;
private float bgLevel;
private Context mContext;
private int layoutResId, width, height, animationStyle;
private int upAnimationStyle, downAnimationStyle;
private boolean isShowBg, isOutSideCancel;
private PopupViewInterface listener;
private int rootGravity = Gravity.TOP | Gravity.START; // 以左上角爲計算參照點
private MyPopupWindow(Builder builder) {
this.mContext = builder.context;
this.view = builder.view;
this.bgLevel = builder.bgLevel;
this.layoutResId = builder.layoutResId;
this.width = builder.width;
this.height = builder.height;
this.animationStyle = builder.animationStyle;
this.upAnimationStyle = builder.upAnimationStyle;
this.downAnimationStyle = builder.downAnimationStyle;
this.isShowBg = builder.isShowBg;
this.isOutSideCancel = builder.isOutSideCancel;
this.listener = builder.listener;
initView();
}
private void initView() {
if (layoutResId != 0) {
popupView = LayoutInflater.from(mContext).inflate(layoutResId, null, false);
} else if (view != null) {
popupView = view;
}
if (listener != null) {
listener.getPopupContentView(popupView);
}
setContentView(popupView);
setWidthAndHeight(width, height);
//設置透明背景
setBackgroundDrawable(new ColorDrawable(0x00000000));
//設置outside可點擊
setOutsideTouchable(isOutSideCancel);
setFocusable(isOutSideCancel);
// { PopupWindow.ANIMATION_STYLE_DEFAULT = -1}
setAnimationStyle(animationStyle == 0 ? -1 : animationStyle);
}
private void setBackGroundLevel(boolean isShowBg, float bgLevel) {
if (isShowBg) {
Window window = ((Activity) mContext).getWindow();
WindowManager.LayoutParams params = window.getAttributes();
params.alpha = bgLevel == 0 ? 0.8f : bgLevel;
window.setAttributes(params);
}
}
private void setWidthAndHeight(int width, int height) {
if (width == 0 || height == 0) {
setWidth(ViewGroup.LayoutParams.WRAP_CONTENT);
setHeight(ViewGroup.LayoutParams.WRAP_CONTENT);
} else {
setWidth(width);
setHeight(height);
}
}
public interface PopupViewInterface {
void getPopupContentView(View popupView);
}
/**
* 根據位置自適應向上還是向下彈出
*
* @param anchorView 目標View
* @param xoff x方向偏移
* @param yoff y方向偏移
*/
public void showVerticalAutomatic(View anchorView, int xoff, int yoff) {
int[] offsets = calculateVerticalPopWindowPos(anchorView, popupView, 0, true);
showAtLocation(anchorView, rootGravity, offsets[0] + xoff, offsets[1] + yoff);
}
/**
* 根據位置自適應向左還是向右彈出
*
* @param anchorView 目標View
* @param xoff x方向偏移
* @param yoff y方向偏移
*/
public void showHorizontalAutomatic(View anchorView, int xoff, int yoff) {
int[] offsets = calculateHorizontalPopupWindow(anchorView, popupView, 0, true);
showAtLocation(anchorView, rootGravity, offsets[0] + xoff, offsets[1] + yoff);
}
/**
* 向左彈出
*
* @param anchorView
* @param xoff
* @param yoff
*/
public void showAnchorViewLeft(View anchorView, int xoff, int yoff) {
int[] offsets = calculateHorizontalPopupWindow(anchorView, popupView, Gravity.START, false);
// 以左上角爲計算參照點 Gravity.TOP | Gravity.START
showAtLocation(anchorView, rootGravity, offsets[0] + xoff, offsets[1] + yoff);
}
/**
* 向右彈出
*
* @param anchorView
* @param xoff
* @param yoff
*/
public void showAnchorViewRight(View anchorView, int xoff, int yoff) {
int[] offsets = calculateHorizontalPopupWindow(anchorView, popupView, Gravity.END, false);
showAtLocation(anchorView, rootGravity, offsets[0] + xoff, offsets[1] + yoff);
}
/**
* 向上彈出
*
* @param anchorView
* @param xoff
* @param yoff
*/
public void showAnchorViewTop(View anchorView, int xoff, int yoff) {
int[] offsets = calculateVerticalPopWindowPos(anchorView, popupView, Gravity.TOP, false);
showAtLocation(anchorView, rootGravity, offsets[0] + xoff, offsets[1] + yoff);
}
/**
* 向下彈出
*
* @param anchorView
* @param xoff
* @param yoff
*/
public void showAnchorViewBottom(View anchorView, int xoff, int yoff) {
int[] offsets = calculateVerticalPopWindowPos(anchorView, popupView, Gravity.BOTTOM, false);
showAtLocation(anchorView, rootGravity, offsets[0] + xoff, offsets[1] + yoff);
}
@Override
public void dismiss() {
super.dismiss();
setBackGroundLevel(isShowBg, 1.0f);
}
@Override
public void showAsDropDown(View anchor, int xoff, int yoff, int gravity) {
setBackGroundLevel(isShowBg, bgLevel);
super.showAsDropDown(anchor, xoff, yoff, gravity);
}
@Override
public void showAtLocation(View parent, int gravity, int x, int y) {
setBackGroundLevel(isShowBg, bgLevel);
super.showAtLocation(parent, gravity, x, y);
}
/**
* @param anchorView 錨點View
* @param popupContentView popupView
* @param gravity 顯示在左邊或者右邊
* @param showAutomatic 是否自適應 根據錨點View位置 左右顯示
* @return
*/
private int[] calculateHorizontalPopupWindow(View anchorView, View popupContentView, int gravity, boolean showAutomatic) {
int[] popupWindowLoc = new int[2];
int[] anchorLoc = new int[2];
anchorView.getLocationOnScreen(anchorLoc);
int anchorViewHeight = anchorView.getHeight();
int anchorViewWidth = anchorView.getWidth();
// 獲取屏幕的高寬
final int screenHeight = AppUtils.getScreenHeight(mContext);
final int screenWidth = AppUtils.getScreenWidth(mContext);
popupContentView.measure(View.MeasureSpec.UNSPECIFIED, View.MeasureSpec.UNSPECIFIED);
// 計算popupView的高寬
final int popupViewHeight = popupContentView.getMeasuredHeight();
final int popupViewWidth = popupContentView.getMeasuredWidth();
if (showAutomatic) {
boolean isNeedShowLeft = screenWidth - anchorLoc[0] - anchorViewWidth < popupViewWidth;
if (isNeedShowLeft) {
popupWindowLoc[0] = anchorLoc[0] - popupViewWidth;
popupWindowLoc[1] = anchorViewHeight / 2 + anchorLoc[1] - popupViewHeight / 2;
setAnimationStyle(R.style.popup_anim_left);
} else {
popupWindowLoc[0] = anchorLoc[0] + anchorViewWidth;
popupWindowLoc[1] = anchorViewHeight / 2 + anchorLoc[1] - popupViewHeight / 2;
setAnimationStyle(R.style.popup_anim_left);
}
} else {
if (gravity == Gravity.START) {
popupWindowLoc[0] = anchorLoc[0] - popupViewWidth;
popupWindowLoc[1] = anchorViewHeight / 2 + anchorLoc[1] - popupViewHeight / 2;
setAnimationStyle(R.style.popup_anim_left);
} else if (gravity == Gravity.END) {
popupWindowLoc[0] = anchorLoc[0] + anchorViewWidth;
popupWindowLoc[1] = anchorViewHeight / 2 + anchorLoc[1] - popupViewHeight / 2;
setAnimationStyle(R.style.popup_anim_left);
}
}
return popupWindowLoc;
}
/**
* 計算豎直方向偏移
*/
private int[] calculateVerticalPopWindowPos(final View anchorView, final View popupContentView, int gravity, boolean showAutomatic) {
final int[] popupWindowLoc = new int[2];
final int[] anchorLoc = new int[2];
// 獲取錨點View在屏幕上的左上角座標位置
anchorView.getLocationOnScreen(anchorLoc);
final int anchorHeight = anchorView.getHeight();
// 獲取屏幕的高寬
final int screenHeight = AppUtils.getScreenHeight(mContext);
final int screenWidth = AppUtils.getScreenWidth(mContext);
popupContentView.measure(View.MeasureSpec.UNSPECIFIED, View.MeasureSpec.UNSPECIFIED);
// 計算popupView的高寬
final int popupViewHeight = popupContentView.getMeasuredHeight();
final int popupViewWidth = popupContentView.getMeasuredWidth();
Log.e("MyPopup", "screenHeight: " + screenHeight +
" anchorView Y方向： " + anchorLoc[1] +
" anchorView Height： " + anchorHeight +
" anchorView 下方剩餘高度： " + (screenHeight - anchorLoc[1] - anchorHeight) +
" popupViewHeight：" + popupViewHeight);
if (showAutomatic) {
// 判斷需要向上彈出還是向下彈出顯示
final boolean isNeedShowUp = (screenHeight - anchorLoc[1] - anchorHeight < popupViewHeight);
if (isNeedShowUp) {
//popupWindowLoc[0] = screenWidth - popupViewWidth;
popupWindowLoc[0] = (screenWidth - popupViewWidth) / 2;
popupWindowLoc[1] = anchorLoc[1] - popupViewHeight;
if (upAnimationStyle != 0) {
setAnimationStyle(upAnimationStyle);
}
} else {
//popupWindowLoc[0] = screenWidth - popupViewWidth;
popupWindowLoc[0] = (screenWidth - popupViewWidth) / 2;
popupWindowLoc[1] = anchorLoc[1] + anchorHeight;
if (downAnimationStyle != 0) {
setAnimationStyle(downAnimationStyle);
}
}
} else {
if (gravity == Gravity.TOP) {
//popupWindowLoc[0] = screenWidth - popupViewWidth;
popupWindowLoc[0] = (screenWidth - popupViewWidth) / 2;
popupWindowLoc[1] = anchorLoc[1] - popupViewHeight;
if (upAnimationStyle != 0) {
setAnimationStyle(upAnimationStyle);
}
} else if (gravity == Gravity.BOTTOM) {
//popupWindowLoc[0] = screenWidth - popupViewWidth;
popupWindowLoc[0] = (screenWidth - popupViewWidth) / 2;
popupWindowLoc[1] = anchorLoc[1] + anchorHeight;
if (downAnimationStyle != 0) {
setAnimationStyle(downAnimationStyle);
}
}
}
return popupWindowLoc;
}
public static class Builder {
public View view;
public Context context;
public float bgLevel;
public PopupViewInterface listener;
public boolean isShowBg, isOutSideCancel;
public int layoutResId, width, height, animationStyle, upAnimationStyle, downAnimationStyle;
public Builder(Context context) {
this.context = context;
}
public Builder setView(int layoutResId) {
this.view = null;
this.layoutResId = layoutResId;
return this;
}
public Builder setView(View view) {
this.view = view;
this.layoutResId = 0;
return this;
}
public Builder setContentViewClickListener(PopupViewInterface listener) {
this.listener = listener;
return this;
}
public Builder setParams(int width, int height) {
this.width = width;
this.height = height;
return this;
}
public Builder setBackGroundLevel(float level) {
this.bgLevel = level;
return this;
}
public Builder setIsShowBg(boolean isShowBg) {
this.isShowBg = isShowBg;
return this;
}
public Builder setOutSideCancel(boolean isOutSideCancel) {
this.isOutSideCancel = isOutSideCancel;
return this;
}
public Builder setAnimationStyle(int animationStyle) {
this.animationStyle = animationStyle;
return this;
}
public Builder setUpShowAnimationStyle(int upAnimationStyle) {
this.upAnimationStyle = upAnimationStyle;
return this;
}
public Builder setDownShowAnimationStyle(int downAnimationStyle) {
this.downAnimationStyle = downAnimationStyle;
return this;
}
public MyPopupWindow build() {
return new MyPopupWindow(this);
}
}
}
簡單用法（這邊用的Kotlin）：
private fun initView() {
val popupWindow = MyPopupWindow.Builder(this)
.setIsShowBg(true) // 是否背景變灰
.setParams(1000, ViewGroup.LayoutParams.WRAP_CONTENT) // 設置寬高
.setView(R.layout.dialog_popup_test) // 設置佈局
.setUpShowAnimationStyle(R.style.popup_dialog_anim2) // 向上展開的動畫
.setDownShowAnimationStyle(R.style.popup_dialog_anim) //向下展開的動畫
.setOutSideCancel(true) // 點擊外面關閉
.setBackGroundLevel(0.8f) //背景顏色深度
.setContentViewClickListener(this) // view操作回調
.build()
btn.setOnClickListener {
// 自適應
popupWindow.showAutomatic(btn, -350, 0)
// val array = IntArray(2)
// btn.getLocationOnScreen(array)
// Log.e("x-y", array[0].toString() + " " + array[1].toString())
}
btn2.setOnClickListener {
// 原本的用法 以底部彈出爲例，其他類似
popupWindow.showAtLocation(it,Gravity.BOTTOM,0,0)
}
}
override fun getPopupContentView(popupView: View?) {
popupView?.let {
it.findViewById<TextView>(R.id.test_tv).setOnClickListener {
Toast.makeText(this, "clicked", Toast.LENGTH_SHORT).show()
}
}
}
（補充）獲取屏幕寬高：
public static int getScreenHeight(Context context) {
WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
Point size = new Point();
((Activity) context).getWindowManager().getDefaultDisplay().getSize(size);
return size.y;// 高 return size.x 寬
}