Android textView复制，popupwindow显示在文字上方

/** 点击复制 的按钮 */
private TextView textView_copy;
/** 复制文字跳出的popupwindow */
private PopupWindow popupWindow;
/** 设置popup的显示位置 */
private int[] location;
/**popup的宽*/
private int popupWidth;
/**popup的高*/
private int popupHeight;

/** 设置复制的popupwindow */
private void setPopupWindow() {
textView_copy = new TextView(context);
textView_copy.setBackgroundResource(R.drawable.popover);
LayoutParams params = new LayoutParams(LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT);
textView_copy.setLayoutParams(params);
textView_copy.setGravity(Gravity.CENTER);
textView_copy.setPadding(0, 0, 0, 20);
textView_copy.setText("复制");
textView_copy.setTextSize(14);
textView_copy.setTextColor(Color.WHITE);
popupWindow = new PopupWindow(textView_copy,
LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
location = new int[2];
textView_copy.measure(MeasureSpec.UNSPECIFIED, MeasureSpec.UNSPECIFIED);
popupWindow.setFocusable(true);

popupWidth = textView_copy.getMeasuredWidth();
popupHeight = textView_copy.getMeasuredHeight();
}

textView_copy.setOnKeyListener(new OnKeyListener() {//设置返回键的事件处理，让popuwindow消失

@Override
public boolean onKey(View v, int keyCode, KeyEvent event) {

switch (keyCode) {
case KeyEvent.KEYCODE_BACK:
if (popupWindow != null && popupWindow.isShowing())
{
popupWindow.dismiss();
}
break;

default:
break;
}

return false;
}
});
tv_content.setOnLongClickListener(new OnLongClickListener() {//长按textView的监听,tv_content为点击的textview

@Override
public boolean onLongClick(View v) {
v.getLocationOnScreen(location);//当前的localtion在整个屏幕的坐标位置
if (!popupWindow.isShowing()) {
popupWindow.showAtLocation(v, Gravity.NO_GRAVITY,// 设置popup在控件的上方中间偏移量的位置出现
(location[0] + v.getWidth() / 2) - popupWidth / 2,
location[1] - popupHeight);
textView_copy.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View v) {
popupWindow.dismiss();
ClipboardManager clipboardManager = (ClipboardManager)context.getSystemService(Context.CLIPBOARD_SERVICE); 		       clipboardManager.setPrimaryClip(ClipData.newPlainText(null, tv_content.getText().toString()));
}
});
}
return false;
}
});