Android控件ImageSwitcher.doc

ImageSwitcher是Android中控制图片展示效果的一个控件，效果图如下：一、重要方法setImageURI(Uriuri)：设置图片地址setImageResource(int resid)：设置图片资源库setImageDrawable(Drawabledrawable)：绘制图片二、实例 is = (ImageSwitcher) findViewById(R.id.switcher);is.setFactory(this);设置动画效果is.setInAnimation(AnimationUtils.loadAnimation(this,android.R.anim.fade_in);is.setOutAnimation(AnimationUtils.loadAnimation(this,android.R.anim.fade_out);三、完整代码1.布局文件 2.Java代码package wjq.WidgetDemo;import android.app.Activity;import android.content.Context;import android.os.Bundle;import android.view.View;import android.view.ViewGroup;import android.view.Window;import android.view.animation.AnimationUtils;import android.widget.AdapterView;import android.widget.BaseAdapter;import android.widget.Gallery;import android.widget.ImageSwitcher;import android.widget.ImageView;import android.widget.AdapterView.OnItemClickListener;import android.widget.AdapterView.OnItemSelectedListener;import android.widget.Gallery.LayoutParams;import android.widget.ViewSwitcher.ViewFactory;public class ImageSwitcherDemo extends Activity implementsOnItemSelectedListener, ViewFactory private ImageSwitcher is;private Gallery gallery;private Integer mThumbIds = R.drawable.b, R.drawable.c,R.drawable.d, R.drawable.f, R.drawable.g,;private Integer mImageIds = R.drawable.b, R.drawable.c,R.drawable.d, R.drawable.f, R.drawable.g, ;/* * (non-Javadoc) * * see android.app.Activity#onCreate(android.os.Bundle) */Overrideprotected void onCreate(Bundle savedInstanceState) / TODO Auto-generated method stubsuper.onCreate(savedInstanceState);requestWindowFeature(Window.FEATURE_NO_TITLE);setContentView(R.layout.imageswitcherpage);is = (ImageSwitcher) findViewById(R.id.switcher);is.setFactory(this);is.setInAnimation(AnimationUtils.loadAnimation(this,android.R.anim.fade_in);is.setOutAnimation(AnimationUtils.loadAnimation(this,android.R.anim.fade_out);gallery = (Gallery) findViewById(R.id.gallery);gallery.setAdapter(new ImageAdapter(this);gallery.setOnItemSelectedListener(this);Overridepublic View makeView() ImageView i = new ImageView(this);i.setBackgroundColor(0xFF000000);i.setScaleType(ImageView.ScaleType.FIT_CENTER);i.setLayoutParams(new ImageSwitcher.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT);return i;public class ImageAdapter extends BaseAdapter public ImageAdapter(Context c) mContext = c;public int getCount() return mThumbIds.length;public Object getItem(int position) return position;public long getItemId(int position) return position;public View getView(int position, View convertView, ViewGroup parent) ImageView i = new ImageView(mContext);i.setImageResource(mThumbIdsposition);i.setAdjustViewBounds(true);i.setLayoutParams(new Gallery.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);i.setBackgroundResource(R.drawable.e);return i;private Context mContext;Overridepublic void onItemSelected(AdapterView parent, View view,