ch011 Android(安卓)Galley与ImageSwitch
--------------------------------------------Layoutactivity_main.xml--------------------------
<LinearLayoutxmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/LinearLayout1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<ImageSwitcher
android:id="@+id/imageSwitcher"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="0.2">
</ImageSwitcher>
<Gallery
android:id="@+id/gallery"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="0.8"android:spacing="10sp"/>
</LinearLayout>
--------------------------------------------Layoutgallery_item.xml---------------------------
<RelativeLayoutxmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/RelativeLayout1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<ImageView
android:id="@+id/image"
android:layout_width="wrap_content"
android:layout_height="wrap_content"android:src="@drawable/ic_launcher"/>
</RelativeLayout>
--------------------------------------------AdapterImageAdapter.xml------------------------
packagecom.ch11;
importandroid.content.Context;
importandroid.view.LayoutInflater;
importandroid.view.View;
importandroid.view.ViewGroup;
importandroid.view.ViewGroup.LayoutParams;
importandroid.widget.BaseAdapter;
importandroid.widget.Gallery;
importandroid.widget.ImageView;
/**
*
*项目名称：com.ch11
*类名称：ImageAdapter
*类描述：自定义适配器,为Gallery提供数据
*创建人：方勇
*创建时间：2012-11-16下午4:08:11
*Copyright(c)方勇-版权所有
*/
publicclassImageAdapterextendsBaseAdapter{
/*上下文对象*/
privateContextmContext;
/*布局管理对象*/
privateLayoutInflaterlayoutInfalter;
/*图片资源集合*/
publicstaticInteger[]images={R.drawable.a,R.drawable.b,R.drawable.c,R.drawable.d,R.drawable.e};
publicImageAdapter(Contextcontext){
super();
this.mContext=context;
layoutInfalter=LayoutInflater.from(mContext);
}
/*Gallery对应的图片个数*/
@Override
publicintgetCount(){
//TODOAuto-generatedmethodstub
returnimages.length;
}
@Override
publicObjectgetItem(intposition){
//TODOAuto-generatedmethodstub
returnposition;
}
@Override
publiclonggetItemId(intposition){
//TODOAuto-generatedmethodstub
returnposition;
}
@Override
publicViewgetView(intposition,ViewconvertView,ViewGroupparent){
ImageViewimageView;
/*实例化ImageView对象*/
if(null==convertView){
/*获取根视图对象*/
Viewview=layoutInfalter.inflate(R.layout.gallery_item,null);
/*图片对象*/
imageView=(ImageView)view.findViewById(R.id.image);
}else{
imageView=(ImageView)convertView;
}
/*图片源*/
imageView.setImageResource(images[position]);
/*Gallery图片布局类型*/
imageView.setLayoutParams(newGallery.LayoutParams(100,LayoutParams.FILL_PARENT));
returnimageView;
}
}
--------------------------------------------MainActivity.java-----------------------------------
packagecom.ch11;
importandroid.app.Activity;
importandroid.os.Bundle;
importandroid.util.Log;
importandroid.view.MotionEvent;
importandroid.view.View;
importandroid.view.View.OnTouchListener;
importandroid.view.ViewGroup.LayoutParams;
importandroid.widget.AdapterView;
importandroid.widget.AdapterView.OnItemSelectedListener;
importandroid.widget.Gallery;
importandroid.widget.ImageSwitcher;
importandroid.widget.ImageView;
importandroid.widget.ViewSwitcher.ViewFactory;
/**
*
*项目名称：com.ch11
*类名称：MainActivity
*类描述：Galley,ImageSwitch,自定义适配器
*创建人：方勇
*创建时间：2012-11-16上午9:04:16
*Copyright(c)方勇-版权所有
*/
publicclassMainActivityextendsActivityimplementsOnItemSelectedListener,ViewFactory{
/*相册控件*/
privateGallerygallery;
/*图片切换控件*/
privateImageSwitcherimageSwitcher;
//选中的图片索引
privateintselectedTag=0;
//松开时的坐标x
privateintupX;
//按下时的坐标x
privateintdownX;
@Override
publicvoidonCreate(BundlesavedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
findViews();
setListeners();
init();
}
/*初始化UI*/
privatevoidfindViews(){
gallery=(Gallery)findViewById(R.id.gallery);
imageSwitcher=(ImageSwitcher)findViewById(R.id.imageSwitcher);
}
/*监听事件*/
privatevoidsetListeners(){
gallery.setOnItemSelectedListener(this);
imageSwitcher.setOnTouchListener(onTouchListener);
}
/*设置参数*/
privatevoidinit(){
/*绑定图片适配器*/
ImageAdapterimageAdapter=newImageAdapter(this);
gallery.setAdapter(imageAdapter);
/*SetsthefactoryusedtocreatethetwoviewsbetweenwhichtheViewSwitcherwillflip*/
/*创建两个视图，手指滑动时,相互切换*/
imageSwitcher.setFactory(this);
}
/*选中事件*/
@Override
publicvoidonItemSelected(AdapterView<?>parent,Viewview,intposition,longid){
imageSwitcher.setImageResource(ImageAdapter.images[position]);
selectedTag=position;
}
/*ImageSwitcher的触摸事件*/
privateOnTouchListeneronTouchListener=newOnTouchListener(){
@Override
publicbooleanonTouch(Viewv,MotionEventevent){
if(event.getAction()==MotionEvent.ACTION_DOWN){
downX=(int)event.getX();//取得按下时的坐标x
returntrue;
}elseif(event.getAction()==MotionEvent.ACTION_UP){
upX=(int)event.getX();//取得松开时的坐标x
}
if(upX-downX>100){//从左拖到右，即看前一张
//如果是第一，则去到尾部
if(gallery.getSelectedItemPosition()==0)
selectedTag=gallery.getCount()-1;
else
selectedTag=gallery.getSelectedItemPosition()-1;
}
if(downX-upX>100)//从右拖到左，即看后一张
{
//如果是最后，则去到第一
if(gallery.getSelectedItemPosition()==(gallery.getCount()-1))
selectedTag=0;
else
selectedTag=gallery.getSelectedItemPosition()+1;
}
//Jumpdirectlytoaspecificitemintheadapterdata.
//直接跳到数据适配器中指定项。
//改变gallery图片所选，自动触发ImageSwitcher的setOnItemSelectedListener
gallery.setSelection(selectedTag,true);
returntrue;
}
};
@Override
publicvoidonNothingSelected(AdapterView<?>parent){
//TODOAuto-generatedmethodstub
}
@Override
publicViewmakeView(){
Log.v("fy","makeViewstart...");
ImageViewimageView=newImageView(this);
//伸缩比例与图片位置
imageView.setScaleType(ImageView.ScaleType.FIT_CENTER);
//布局
imageView.setLayoutParams(newImageSwitcher.LayoutParams(LayoutParams.FILL_PARENT,LayoutParams.FILL_PARENT));
Log.v("fy","makeViewend...");
returnimageView;
}
}
--------------------------------------------效果图-----------------------------------------------
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