Android 自定义PopupWindow指定位置或给定View坐标弹出

PopupWindowHelper是一个根据View的位置显示PopupWindow的一个工具类、弹出PopupWindow的位置会根据指定的View出现的位置而动态改变、本Demo是用Android Studio开发的、分为两个Module、但我个人更习惯合到一起、所以看个人需要了、代码很简单、就一个PopupWindowHelper工具类、然后直接可以在Activity上面使用了、效果如下：



PopupWindowHelper代码

public class PopupWindowHelper {

private View popupView;
private PopupWindow mPopupWindow;
private static final int TYPE_WRAP_CONTENT = 0, TYPE_MATCH_PARENT = 1;

public PopupWindowHelper(View view) {
popupView = view;
}

public void showAsDropDown(View anchor) {
mPopupWindow.showAsDropDown(anchor);
}

public void showAsDropDown(View anchor, int xoff, int yoff) {
initPopupWindow(TYPE_WRAP_CONTENT);
mPopupWindow.showAsDropDown(anchor, xoff, yoff);
}

public void showAtLocation(View parent, int gravity, int x, int y) {
initPopupWindow(TYPE_WRAP_CONTENT);
mPopupWindow.showAtLocation(parent, gravity, x, y);
}

public void dismiss() {
if (mPopupWindow.isShowing()){
mPopupWindow.dismiss();
}
}

public void showAsPopUp(View anchor) {
showAsPopUp(anchor, 0, 0);
}

public void showAsPopUp(View anchor, int xoff, int yoff) {
initPopupWindow(TYPE_WRAP_CONTENT);
mPopupWindow.setAnimationStyle(R.style.AnimationUpPopup);
popupView.measure(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
int height = popupView.getMeasuredHeight();
int[] location = new int[2];
anchor.getLocationInWindow(location);
mPopupWindow.showAtLocation(anchor, Gravity.LEFT | Gravity.TOP, location[0]   xoff, location[1] - height   yoff);
}

public void showFromBottom(View anchor) {
initPopupWindow(TYPE_MATCH_PARENT);
mPopupWindow.setAnimationStyle(R.style.AnimationFromButtom);
mPopupWindow.showAtLocation(anchor, Gravity.LEFT | Gravity.BOTTOM, 0, 0);
}

public void showFromTop(View anchor) {
initPopupWindow(TYPE_MATCH_PARENT);
mPopupWindow.setAnimationStyle(R.style.AnimationFromTop);
mPopupWindow.showAtLocation(anchor, Gravity.LEFT | Gravity.TOP, 0, getStatusBarHeight());
}

/**
* touch outside dismiss the popupwindow, default is ture
* @param isCancelable
*/
public void setCancelable(boolean isCancelable) {
if (isCancelable) {
mPopupWindow.setOutsideTouchable(true);
mPopupWindow.setFocusable(true);
}else {
mPopupWindow.setOutsideTouchable(false);
mPopupWindow.setFocusable(false);
}
}

public void initPopupWindow(int type) {
if (type == TYPE_WRAP_CONTENT) {
mPopupWindow = new PopupWindow(popupView, ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
}else if (type == TYPE_MATCH_PARENT) {
mPopupWindow = new PopupWindow(popupView, ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);
}
mPopupWindow.setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));
setCancelable(true);
}

private int getStatusBarHeight() {
return Math.round(25 * Resources.getSystem().getDisplayMetrics().density);
}
}

调用：

public class MainActivity extends AppCompatActivity implements View.OnClickListener {

private PopupWindowHelper popupWindowHelper;
private View popView;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

findViewById(R.id.button).setOnClickListener(this);
popView = LayoutInflater.from(this).inflate(R.layout.popupview, null);
popupWindowHelper = new PopupWindowHelper(popView);
popView.findViewById(R.id.button3).setOnClickListener(this);
}

@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.button:
popupWindowHelper.showAsPopUp(v);
break;
default:
break;
}
}
}

代码：https://github.com/jdsjlzx/PopupWindowHelper