ImageAdapter和PopupWindow的使用

最新推荐文章于 2018-05-30 20:30:30 发布

gz0123456

最新推荐文章于 2018-05-30 20:30:30 发布

阅读量179

点赞数

分类专栏： adnroid 文章标签：移动开发 java

本文链接：https://blog.youkuaiyun.com/gz0123456/article/details/84271262

版权

adnroid 专栏收录该内容

18 篇文章

订阅专栏

本文详细介绍了在Android应用中如何使用PopupWindow组件，包括其基本构造、属性设置、事件监听以及布局实现。重点阐述了如何通过适配器（ImageAdapter）将GridView与PopupWindow结合使用，展示了一个完整的实例代码，包括布局文件和事件处理逻辑。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

[quote]public class SamplePopup extends Activity {   
     PopupWindow popup;   
     //GridView gView;   
     GridView gView;   
    @Override  
    public void onCreate(Bundle savedInstanceState) {   
        super.onCreate(savedInstanceState);   
        setContentView(R.layout.main);   

        final LayoutInflater inflater = (LayoutInflater)this.getSystemService(Context.LAYOUT_INFLATER_SERVICE);   
        final LinearLayout musicGrid = (LinearLayout) inflater.inflate(R.layout.gridviewpopup, null, false);   
          gView = (GridView) musicGrid.findViewById(R.id.gridview);   

        gView.setAdapter(new ImageAdapter(this));   

       <SPAN style="COLOR: #ff00ff">  popup = new PopupWindow(this);   
        popup.setContentView(musicGrid);   
        popup.setTouchable(true);</SPAN>   
   <SPAN style="COLOR: #ff0000">     popup.setFocusable(true);</SPAN>   



        gView.setOnItemClickListener(new Gallery.OnItemClickListener()    
        {   

            public void onItemClick(AdapterView<?> parent, View v, int position, long id)    
            {   Log.i("huhudhufhud","");   
               // popup.showAsDropDown(findViewById(R.id.main));   
                <SPAN style="COLOR: #ff00ff">popup.dismiss();</SPAN>   

            }   

        });    

        final Button popupButton = (Button) findViewById(R.id.popup);   
        popupButton.setOnClickListener(new View.OnClickListener() {   
            public void onClick(View v) {   
            <SPAN style="COLOR: #ff00ff">   popup.setWidth(300);   
                popup.setHeight(200);   
                popup.showAtLocation(findViewById(R.id.main), Gravity.CENTER, 0, 0);</SPAN>   
            }   
        });   

    }   

 }  [/quote]

粉红色部分就是vpopupwindow要使用的，红色的部分一定要添加不然点击事件不执行。

layout.gridviewpopup 如下：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  
    android:id="@+id/gridviewparent"  
    android:orientation="horizontal"  
    android:layout_width="fill_parent"  
    android:layout_height="fill_parent"  
    android:paddingLeft="10dip"  
    android:paddingRight="10dip"  
    android:paddingTop="10dip"  
    android:paddingBottom="10dip"  
    android:gravity="center_horizontal" >   
    <GridView    
        android:id="@+id/gridview"    
        android:layout_width="fill_parent"    
        android:layout_height="fill_parent"  
        android:numColumns="auto_fit"  
        android:verticalSpacing="30dp"  
        android:horizontalSpacing="15dp"  
        android:stretchMode="columnWidth"  
        android:gravity="center"  
    />   
</LinearLayout>[quote][/quote]
main
[code="java">[quote]<?xml version="1.0" encoding="utf-8"?>   
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  
    android:id="@+id/main"  
    android:orientation="vertical"  
    android:layout_width="fill_parent"  
    android:layout_height="fill_parent"  
    >   
    <Button   
        android:id="@+id/popup"  
        android:scaleType="centerInside"  
        android:layout_width="wrap_content"  
        android:layout_height="wrap_content"  
        android:text="POPUP"  
            />   
 </LinearLayout>  
[/quote]

attrsl:

[quote]<?xml version="1.0" encoding="utf-8"?>   
<resources>   
    <declare-styleable name="Gallery1">   
        <attr name="android:galleryItemBackground" />   
    </declare-styleable>   
</resources>  
[/quote]

这个呢只是图片的一个外边框背景。

ImageAdapter的扩展

[quote]public class ImageAdapter extends BaseAdapter {   
    private Context mContext;   
    private int itemBackground;   

    public ImageAdapter(Context c) {   
        mContext = c;   

      //---setting the style---   
        <SPAN style="COLOR: #ffcc00">TypedArray a = c.obtainStyledAttributes(R.styleable.Gallery1);   
        itemBackground = a.getResourceId(R.styleable.Gallery1_android_galleryItemBackground, 0);   
        a.recycle();</SPAN>   
    }   

    public int getCount() {   
        return images.length;   
    }   

    public Object getItem(int position) {   
    //return images[position];   
        return position;   
    }   

    public long getItemId(int position) {   
        return position;   
    }   

    public View getView(int position, View convertView, ViewGroup parent) {   
        ImageView imageView;   
        if (convertView == null) {   
            imageView = new ImageView(mContext);   
        } else {   
            imageView = (ImageView) convertView;   
        }   
        imageView.setImageResource(images[position]);   
        imageView.setScaleType(ImageView.ScaleType.CENTER_INSIDE);   
        <SPAN style="COLOR: #ffcc00">imageView.setBackgroundResource(itemBackground);</SPAN>   
        return imageView;   

    }   
    public Integer[] images = {   
            R.drawable.android,   
            R.drawable.icon,   
            R.drawable.android   
    };   
}  
[/quote]