PopupWindow 弹出在控件上

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popupWindow的布局文件popup.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="wrap_parent"    android:layout_height="wrap_content"    android:background="#206d95e5"    android:orientation="vertical" >    <TextView        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:padding="10dp"        android:text="popupWindow"        android:textSize="16sp" />    <Button        android:id="@+id/btn"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:padding="10dp"        android:text="button"        android:textSize="16sp" /></LinearLayout>

Activity中弹出PopupWindow

public void showPopupWindow(View v){        View contentView = LayoutInflater.from(MainActivity.this).inflate(R.layout.popup, null);        Button button = (Button) contentView.findViewById(R.id.btn);        final PopupWindow popupWindow = new PopupWindow(contentView,                LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT, true);        popupWindow.setTouchable(true);        button.setOnClickListener(new OnClickListener() {            @Override            public void onClick(View v) {                Toast.makeText(MainActivity.this, "onclick==action",                        Toast.LENGTH_SHORT).show();            }        });        //检测屏幕消失的事件        popupWindow.setOnDismissListener(new PopupWindow.OnDismissListener() {            @Override            public void onDismiss() {                Log.d("Chunna.zheng","popupwindow消失啦！");            }        });        // 如果不设置PopupWindow的背景，无论是点击外部区域还是Back键都无法dismiss弹框        popupWindow.setBackgroundDrawable(getResources().getDrawable(                R.mipmap.ic_launcher));        //获取自身的长宽高        contentView.measure(View.MeasureSpec.UNSPECIFIED, View.MeasureSpec.UNSPECIFIED);        int popupHeight = contentView.getMeasuredHeight();        int popupWidth = contentView.getMeasuredWidth();        //获取控件在屏幕上的位置，并赋值给location数组        int[] location = new int[2];        v.getLocationOnScreen(location);        //在控件上方显示        popupWindow.showAtLocation(v, Gravity.NO_GRAVITY, (location[0]), location[1] - popupHeight/2);        // 如果要在控件下方显示，则使用这个方法        //popupWindow.showAsDropDown(v);    }

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