android图片浏览器（二）——实现显示图片的标题

上一篇文章http://blog.csdn.net/badboy1110/article/details/6879236只是单纯的显示一个图片&＃xff0c;虽然我改进了&＃xff0c;但是在使用的时候还是有一些地方不足。所以再次重写&＃xff0c;在原来的基础上实现了以下小特点&＃xff1a;

1、可以显示标题&＃xff1a;

2、原来的滑动速度非常快&＃xff0c;这里给它的速度降低了。

主要是重写了Gallery。

废话少说&＃xff0c;源码如下&＃xff1a;

package cn.yj3g.GalleryTest2;import java.util.HashMap;import android.app.Activity;
import android.content.Context;
import android.content.res.TypedArray;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
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.Gallery.LayoutParams;
import android.widget.ImageSwitcher;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.ViewSwitcher;public class GalleryTestActivity extends Activity implements AdapterView.OnItemClickListener,ViewSwitcher.ViewFactory {&＃64;Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);requestWindowFeature(Window.FEATURE_NO_TITLE);setContentView(R.layout.image_switcher_1);mSwitcher &＃61; (ImageSwitcher) findViewById(R.id.switcher);mSwitcher.setFactory(this);mSwitcher.setInAnimation(AnimationUtils.loadAnimation(this, android.R.anim.fade_in));mSwitcher.setOutAnimation(AnimationUtils.loadAnimation(this, android.R.anim.fade_out));Gallery g &＃61; (Gallery) findViewById(R.id.gallery);g.setAdapter(new ImageAdapter(this, mThumbIds.length));g.setOnItemClickListener(this);// g.setOnItemSelectedListener(this);g.setSelection(1);}public void onItemSelected(AdapterView parent, View v, int position, long id) {mSwitcher.setImageResource(mThumbIds[position % mImageIds.length]);}public void onNothingSelected(AdapterView parent) {}&＃64;Overridepublic View makeView() {Log.v("TAG", "makeView()");ImageView i &＃61; 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;}private ImageSwitcher mSwitcher;public class ImageAdapter extends BaseAdapter {private int mGalleryItemBackground;private HashMap mViewMaps;private int mCount;private LayoutInflater mInflater;public ImageAdapter(Context c, int count) {this.mCount &＃61; count;mViewMaps &＃61; new HashMap(count);mInflater &＃61; LayoutInflater.from(GalleryTestActivity.this);// See res/values/attrs.xml for the that defines// Gallery1.TypedArray a &＃61; obtainStyledAttributes(R.styleable.Gallery1);mGalleryItemBackground &＃61; a.getResourceId(R.styleable.Gallery1_android_galleryItemBackground, 0);a.recycle();}public int getCount() {// return mImageIds.length;return Integer.MAX_VALUE;}public Object getItem(int position) {return position;}public long getItemId(int position) {return position;}public View getView(int position, View convertView, ViewGroup parent) {Log.v("TAG", "getView() position&＃61;" &＃43; position &＃43; " convertView&＃61;" &＃43; convertView);View viewGroup &＃61; mViewMaps.get(position%mCount);ImageView imageView &＃61; null;TextView textView &＃61; null;if(viewGroup&＃61;&＃61;null) {viewGroup &＃61; mInflater.inflate(R.layout.gallery_item, null);imageView &＃61; (ImageView) viewGroup.findViewById(R.id.item_gallery_image);textView &＃61; (TextView) viewGroup.findViewById(R.id.item_gallery_text);imageView.setBackgroundResource(mGalleryItemBackground);mViewMaps.put(position%mCount, viewGroup);imageView.setImageResource(mImageIds[position % mImageIds.length]);textView.setText(titles[position % mImageIds.length]);} return viewGroup;}}private String[] titles &＃61; {"标题1","标题2","标题3","标题4","标题5","标题6","标题7","标题8",};private Integer[] mThumbIds &＃61; { R.drawable.sample_0, R.drawable.sample_1, R.drawable.sample_2,R.drawable.sample_3, R.drawable.sample_4, R.drawable.sample_5, R.drawable.sample_6,R.drawable.sample_7 };private Integer[] mImageIds &＃61; { R.drawable.sample_thumb_0, R.drawable.sample_thumb_1,R.drawable.sample_thumb_2, R.drawable.sample_thumb_3, R.drawable.sample_thumb_4,R.drawable.sample_thumb_5, R.drawable.sample_thumb_6, R.drawable.sample_thumb_7 };&＃64;Overridepublic void onItemClick(AdapterView parent, View view, int position, long id) {mSwitcher.setImageResource(mThumbIds[position % mImageIds.length]);}}


重写的Gallery&＃xff1a;

package cn.yj3g.view;import android.content.Context;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.widget.Gallery;public class MyGallery extends Gallery
{public MyGallery(Context context, AttributeSet attrs){super(context, attrs);}&＃64;Overridepublic boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY){// velocityX/3,这个参数是把速度将为原来的1/3return super.onFling(e1, e2, velocityX / 3, velocityY);}
}


Gallery的item&＃xff1a;

gallery_item.xml