popwindow的基本使用

心已赠人 2024-04-18 10:45 27阅读 0赞

**[android下面popwindow][android_popwindow]的使用**

PopupWindow是阻塞对话框，只有在外部线程或者 PopupWindow本身做退出操作才行。PopupWindow完全依赖Layout做外观，在常见的开发中，PopupWindow应该会与AlertDialog常混用。

1.使用 popwindow实现如下效果：

2.代码如下：MainActivity.java

**public****class** MainActivity **extends** Activity \{

**private** Button button;

@Override

**publicvoid** onCreate(Bundle savedInstanceState)

**super**.onCreate(savedInstanceState);

setContentView(R.layout.*activity\_main*);

//新建一个按钮

button = (Button) findViewById(R.id.*button*);

//按钮的监听事件

button.setOnClickListener(**new** OnClickListener()

**publicvoid** onClick(View v)

// 新建一个popwindow，并显示里面的内容

PopupWindow popupWindow = makePopupWindow(MainActivity.**this**);

//int\[\] xy = new int\[2\];

//button.getLocationOnScreen(xy);

//popupWindow.showAtLocation(button,Gravity.RIGHT|Gravity.TOP,xy\[0\]/2,xy\[1\]+button.getWidth());

//popwindow与按钮之间的相对位置

popupWindow.showAsDropDown(button,2, 5);

\});

// 创建一个包含自定义view的PopupWindow

**private** PopupWindow makePopupWindow(Context cx)

PopupWindow window;

window = **new** PopupWindow(cx);

/\*ListView listview = new ListView(this);

listview.setLayoutParams(new LayoutParams(LayoutParams.FILL\_PARENT,LayoutParams.WRAP\_CONTENT));

listview.setAdapter(new ArrayAdapter<String>(cx, android.R.layout.simple\_expandable\_list\_item\_1,getData()));

\*/

//View contentView = LayoutInflater.from(this).inflate(R.layout.popwindow, null);

//window.setContentView(contentView);

Button b1 = **new** Button(**this**);

b1.setText("first");

b1.setLayoutParams(**new** LayoutParams(LayoutParams.FILL\_PARENT,LayoutParams.*WRAP\_CONTENT*));

Button b2 = **new** Button(**this**);

b2.setText("Second");

b2.setLayoutParams(**new** LayoutParams(LayoutParams.FILL\_PARENT,LayoutParams.*WRAP\_CONTENT*));

LinearLayout linearLayout = **new** LinearLayout(**this**);

linearLayout.addView(b1);

linearLayout.addView(b2);

//linearLayout.addView(listview);

linearLayout.setOrientation(LinearLayout.*VERTICAL*);

window.setContentView(linearLayout); //选择布局方式

//设置popwindow的背景图片

window.setBackgroundDrawable(getResources().getDrawable(R.drawable.*bg\_pop\_pressed*));

//设置popwindow的高和宽

window.setWidth(70);

window.setHeight(320);

// 设置PopupWindow外部区域是否可触摸

window.setFocusable(**true**); //设置PopupWindow可获得焦点

window.setTouchable(**true**); //设置PopupWindow可触摸

window.setOutsideTouchable(**true**); //设置非PopupWindow区域可触摸

**return** window;

//构造数组的函数

**private** List<String> getData()\{

List<String> data = **new** ArrayList<String>();

data.add("数学");

data.add("英语");

data.add("语文");

data.add("历史");

data.add("政治");

//data.add("美术");

//data.add("体育");

**return** data;

@Override

**publicboolean** onCreateOptionsMenu(Menu menu) \{

// Inflate the menu; this adds items to the action bar if it is present.

getMenuInflater().inflate(R.menu.*main*, menu);

**returntrue**;

package mtpop.window.main;

import android.app.Activity;

import android.content.Context;

import android.content.res.Resources;

import android.os.Bundle;

import android.view.Gravity;

import android.view.LayoutInflater;

import android.view.View;

import android.view.View.OnClickListener;

import android.view.ViewGroup.LayoutParams;

import android.widget.Button;

import android.widget.LinearLayout;

import android.widget.PopupWindow;

import android.widget.PopupWindow.OnDismissListener;

import android.widget.TextView;

public class MainActivity extends Activity

private static final String TAG = "MainActivity";

private Button button;

@Override

public void onCreate(Bundle savedInstanceState)

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

button = (Button) findViewById(R.id.button);

button.setOnClickListener(new OnClickListener()

@Override

public void onClick(View v)

// 显示 popupWindow

PopupWindow popupWindow = makePopupWindow(MainActivity.this);

int\[\] xy = new int\[2\];

button.getLocationOnScreen(xy);

popupWindow.showAtLocation(button,Gravity.RIGHT|Gravity.TOP,-xy\[0\]/2,xy\[1\]+button.getWidth());

//popupWindow.showAsDropDown(button,0, 0);

\});

// 创建一个包含自定义view的PopupWindow

private PopupWindow makePopupWindow(Context cx)

PopupWindow window;

window = new PopupWindow(cx);

//View contentView = LayoutInflater.from(this).inflate(R.layout.popwindow, null);

//window.setContentView(contentView);

Button b1 = new Button(this);

b1.setText("first");

b1.setLayoutParams(new LayoutParams(LayoutParams.FILL\_PARENT,LayoutParams.WRAP\_CONTENT));

Button b2 = new Button(this);

b2.setText("Second");

b2.setLayoutParams(new LayoutParams(LayoutParams.FILL\_PARENT,LayoutParams.WRAP\_CONTENT));

LinearLayout linearLayout = new LinearLayout(this);

linearLayout.addView(b1);

linearLayout.addView(b2);

linearLayout.setOrientation(LinearLayout.VERTICAL);

window.setContentView(linearLayout);

window.setBackgroundDrawable(getResources().getDrawable(R.drawable.pop\_bg));

window.setWidth(DisplayManager.dipToPixel(150));

window.setHeight(DisplayManager.dipToPixel(150));

// 设置PopupWindow外部区域是否可触摸

window.setFocusable(true); //设置PopupWindow可获得焦点

window.setTouchable(true); //设置PopupWindow可触摸

window.setOutsideTouchable(true); //设置非PopupWindow区域可触摸

return window;

3. main.xml

</RelativeLayout>  
   
</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

android:layout\_width="fill\_parent"

android:layout\_height="fill\_parent"

android:orientation="vertical" >

<LinearLayout

android:layout\_width="fill\_parent"

android:layout\_height="wrap\_content"

android:background="@android:color/darker\_gray"

android:orientation="horizontal" >

<TextView

android:layout\_width="fill\_parent"

android:layout\_height="wrap\_content"

android:layout\_weight="1"

android:text="Title" />

<Button

android:id="@+id/button"

android:layout\_width="wrap\_content"

android:layout\_height="wrap\_content"

android:text="click" />

</LinearLayout>

注意：

\* 新建一个popupWindow弹出框 popupWindow是一个阻塞式的弹出框，这就意味着在我们退出这个弹出框之前，程序会一直等待，

\* 这和AlertDialog不同哦，AlertDialog是非阻塞式弹出框，AlertDialog弹出的时候，后台可是还可以做其他事情的哦。     \*

\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*

1.PopupWindow的隐藏

// 隐藏菜单

**publicvoid** dismiss() \{

Window.dismiss();

\}final PopupWindow window = mPageStatWin;

if(null != window && window.isShowing()) \{

win.dismiss();

2.Popupwindow的显示及位置设置

window.showAtLocation(parent, Gravity.RIGHT | Gravity.BOTTOM, 10,10);

第一个参数指定PopupWindow的锚点view，即依附在哪个view上。

第二个参数指定起始点为parent的右下角，第三个参数设置以parent的右下角为原点，向左、上各偏移10像素。

//将PopupWindow作为anchor的下拉窗口显示。即在anchor的左下角显示  
window.showAsDropDown(anchor);  
//xoff,yoff基于anchor的左下角进行偏移。  
window.showAsDropDown(anchor, xoff, yoff);

如果没有充足的空间显示PopupWindow，那么PopupWindow的左下角将位于anchor的左上角来显示。

\* popupWindow.showAsDropDown（View view）弹出对话框，位置在紧挨着view组件

\* showAsDropDown(View anchor, int xoff, int yoff)弹出对话框，位置在紧挨着view组件，x y 代表着偏移量

\* showAtLocation(View parent, int gravity, int x, int y)弹出对话框

\* parent 父布局 gravity 依靠父布局的位置如Gravity.CENTER  x y 坐标值

//设置popwindow的高和宽

window.setWidth(70);

window.setHeight(320);

// 设置PopupWindow外部区域是否可触摸

window.setFocusable(**true**); //设置PopupWindow可获得焦点

window.setTouchable(**true**); //设置PopupWindow可触摸

window.setOutsideTouchable(**true**); //设置非PopupWindow区域可触摸

设置其可以获得焦点，可触摸，外部区域可触摸(很重要)

[android_popwindow]: http://blog.csdn.net/ym19860303/article/details/7657101
[http_schemas.android.com_apk_res_android]: http://schemas.android.com/apk/res/android