Android 控件之Gallery图片集

　　Gallery是Android中的图片库控件。先看效果，爽一番

源码下载

一、简介

　　在中心锁定，水平显示列表的项。

二、实例

1.布局文件

<?xml version="1.0" encoding="utf-8"?><LinearLayout  xmlns:android="http://schemas.android.com/apk/res/android"  android:layout_width="fill_parent"   android:orientation="vertical"  android:layout_height="wrap_content">    <Gallery xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/gallery" android:layout_width="match_parent" android:layout_height="wrap_content"/><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:orientation="vertical"    android:layout_width="match_parent"    android:layout_height="wrap_content">    <Gallery android:id="@+id/gallery1"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:gravity="center_vertical"        android:spacing="16dp"    /></LinearLayout></LinearLayout>

2.属性文件

<?xml version="1.0" encoding="utf-8"?><resources>    <declare-styleable name="TogglePrefAttrs">        <attr name="android:preferenceLayoutChild" />    </declare-styleable>        <!-- These are the attributes that we want to retrieve from the theme         in view/Gallery1.java -->    <declare-styleable name="Gallery1">        <attr name="android:galleryItemBackground" />    </declare-styleable>         <declare-styleable name="LabelView">        <attr name="text" format="string" />        <attr name="textColor" format="color" />        <attr name="textSize" format="dimension" />    </declare-styleable></resources> 3.代码/** *  */package wjq.WidgetDemo;import android.R.layout;import android.app.Activity;import android.content.Context;import android.content.res.TypedArray;import android.database.Cursor;import android.os.Bundle;import android.provider.Contacts.People;import android.view.ContextMenu;import android.view.MenuItem;import android.view.View;import android.view.ViewGroup;import android.view.ContextMenu.ContextMenuInfo;import android.widget.BaseAdapter;import android.widget.Gallery;import android.widget.ImageView;import android.widget.SimpleCursorAdapter;import android.widget.SpinnerAdapter;import android.widget.Toast;import android.widget.AdapterView.AdapterContextMenuInfo;/** * @author 记忆的永恒 *  */public class GalleryDemo extends Activity { private Gallery gallery; private Gallery gallery1; /*  * (non-Javadoc)  *   * @see android.app.Activity#onCreate(android.os.Bundle)  */ @Override protected void onCreate(Bundle savedInstanceState) {  // TODO Auto-generated method stub  super.onCreate(savedInstanceState);  setContentView(R.layout.gallerypage);  gallery = (Gallery) findViewById(R.id.gallery);  gallery.setAdapter(new ImageAdapter(this));    registerForContextMenu(gallery);     Cursor c = getContentResolver().query(People.CONTENT_URI, null, null, null, null);         startManagingCursor(c);                  SpinnerAdapter adapter = new SimpleCursorAdapter(this,         // Use a template that displays a text view                 android.R.layout.simple_gallery_item,                 // Give the cursor to the list adatper                 c,                 // Map the NAME column in the people database to...                 new String[] {People.NAME},                 // The "text1" view defined in the XML template                 new int[] { android.R.id.text1 });         gallery1= (Gallery) findViewById(R.id.gallery1);         gallery1.setAdapter(adapter); } @Override public void onCreateContextMenu(ContextMenu menu, View v,   ContextMenuInfo menuInfo) {  menu.add("Action"); } @Override public boolean onContextItemSelected(MenuItem item) {  AdapterContextMenuInfo info = (AdapterContextMenuInfo) item    .getMenuInfo();  Toast.makeText(this, "Longpress: " + info.position, Toast.LENGTH_SHORT)    .show();  return true; }  public class ImageAdapter extends BaseAdapter {  int mGalleryItemBackground;  private Context mContext;  private Integer[] mImageIds = { R.drawable.b, R.drawable.c,    R.drawable.d, R.drawable.f, R.drawable.g };  public ImageAdapter(Context context) {   mContext = context;   TypedArray a = obtainStyledAttributes(R.styleable.Gallery1);   mGalleryItemBackground = a.getResourceId(     R.styleable.Gallery1_android_galleryItemBackground, 0);   a.recycle();  }  @Override  public int getCount() {   return mImageIds.length;  }  @Override  public Object getItem(int position) {   return position;  }  @Override  public long getItemId(int position) {   return position;  }  @Override  public View getView(int position, View convertView, ViewGroup parent) {   ImageView i = new ImageView(mContext);   i.setImageResource(mImageIds[position]);   i.setScaleType(ImageView.ScaleType.FIT_XY);   i.setLayoutParams(new Gallery.LayoutParams(300, 400));   // The preferred Gallery item background   i.setBackgroundResource(mGalleryItemBackground);   return i;  } }}

Android(安卓)控件之Gallery图片集

Android 控件之Gallery图片集

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