Android PopupWindow显示位置和显示大小

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<?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:background="#DA4F30"

    android:cacheColorHint="#000000"

    android:orientation="vertical" >

    <ListView

        android:id="@+id/lv_dialog"

        android:layout_width="match_parent"

        android:layout_height="match_parent"

        android:cacheColorHint="#00000000"

        android:scrollbars="none"

        android:overScrollMode="never">

    </ListView>

</LinearLayout>

package com.example.showpop;

import android.app.Activity;

import android.content.Context;

import android.graphics.drawable.BitmapDrawable;

import android.os.Bundle;

import android.view.Gravity;

import android.view.LayoutInflater;

import android.view.View;

import android.view.View.OnClickListener;

import android.view.Window;

import android.view.WindowManager;

import android.widget.AdapterView;

import android.widget.AdapterView.OnItemClickListener;

import android.widget.ArrayAdapter;

import android.widget.ImageView;

import android.widget.LinearLayout;

import android.widget.ListView;

import android.widget.PopupWindow;

public class MainActivity extends Activity {

	private LinearLayout layout;

	private ListView listView;

	private PopupWindow popupWindow;

	private String title[] = { "1", "2", "3", "4", "5" };

	private  ImageView imageView;

	@Override

	protected void onCreate(Bundle savedInstanceState) {

		super.onCreate(savedInstanceState);

		requestWindowFeature(Window.FEATURE_NO_TITLE);

		setContentView(R.layout.activity_main);

		imageView=(ImageView) findViewById(R.id.imageview_above_more);

		imageView.setOnClickListener(new OnClickListener() {

			@Override

			public void onClick(View v) {

				showPopupWindow(imageView);

			}

		});

	}

	public void showPopupWindow(View parent) {

		//载入布局

		layout = (LinearLayout) LayoutInflater.from(MainActivity.this).inflate(

				R.layout.dialog, null);

		//找到布局的控件

		listView = (ListView) layout.findViewById(R.id.lv_dialog);

		//设置适配器

		listView.setAdapter(new ArrayAdapter<String>(MainActivity.this,

				R.layout.text, R.id.tv_text, title));

		// 实例化popupWindow

		popupWindow = new PopupWindow(layout, 300,500);

		//控制键盘能否够获得焦点

		popupWindow.setFocusable(true);

		//设置popupWindow弹出窗口的背景

		popupWindow.setBackgroundDrawable(new BitmapDrawable(null,""));

		WindowManager manager=(WindowManager) getSystemService(Context.WINDOW_SERVICE);

		@SuppressWarnings("deprecation")

		//获取xoff

		int xpos=manager.getDefaultDisplay().getWidth()/2-popupWindow.getWidth()/2;

		//xoff,yoff基于anchor的左下角进行偏移。

popupWindow.showAsDropDown(parent,xpos, 0);

		//监听

		listView.setOnItemClickListener(new OnItemClickListener() {

			@Override

			public void onItemClick(AdapterView<?

> arg0, View arg1, int arg2,

					long arg3) {

				//关闭popupWindow

				popupWindow.dismiss();

				popupWindow = null;

			}

		});

	}

}

源代码下载地址

秒客网

Android PopupWindow显示位置和显示大小

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