popupWindow 的使用

private void showPopupWindow(View view) {
//一个自定义 布局，作为显示的内容
View contentView = LayoutInflater.from(this).inflate(R.layout.activity_myinfo_popupwindow, null);
//设置按钮的点击事件
Button bt1 = (Button) contentView.findViewById(R.id.myinfo_popup_button1);
Button bt2 = (Button) contentView.findViewById(R.id.myinfo_popup_button2);
//创建出PopupWindow
final PopupWindow popupWindow = new PopupWindow(contentView, WindowManager.LayoutParams.WRAP_CONTENT, WindowManager.LayoutParams.WRAP_CONTENT, true);
bt1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
ToastUtil.toast(MyInfoActivity.this, "点击了bt1");
popupWindow.dismiss();
}
});
bt2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
ToastUtil.toast(MyInfoActivity.this, "点击了bt2");
popupWindow.dismiss();
}
});
// 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
// 我觉得这里是API的一个bug

popupWindow.setBackgroundDrawable(getResources().getDrawable(R.mipmap.book_page_bg2));
//设置宽度
popupWindow.setWidth(view.getWidth() / 4 * 3);
//设置显示位置
popupWindow.showAtLocation(contentView, Gravity.CENTER, 0, -100);
//可点击
popupWindow.setTouchable(true);
popupWindow.setFocusable(true);
popupWindow.setOutsideTouchable(true);

popupWindow.setTouchInterceptor(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
if (event.getAction() == MotionEvent.ACTION_OUTSIDE) {
popupWindow.dismiss();
return true;
}
//如果返回true，touch事件将被拦截
//拦截后，popupWindow的OnTouchEvennt不被调用，这样点击外部区域无法dismiss
return false;

}
});

//将popup展示出来
popupWindow.showAsDropDown(view);

}

private void initAlert() {
AlertDialog.Builder builder = new AlertDialog.Builder(this);

}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:background="@mipmap/book_page_bg1">

<Button
android:id="@+id/myinfo_popup_button1"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:background="#fffffff0"
android:onClick="onclick"
android:text="从相册中选取"
android:textSize="18sp" />
<TextView
android:layout_width="match_parent"
android:layout_height="1dp"

android:background="#eeeeeeee"/>

<Button
android:id="@+id/myinfo_popup_button2"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:background="#fffffff0"
android:onClick="onclick"
android:text="拍照"
android:textSize="18sp" />

</LinearLayout>