Android之图片滑动与显示

先在Transitions中插入ImageSwitcher

package com.example.Galleryphotoshow;

import com.example.Galleryphotoshow.R;

import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.BaseAdapter;
import android.widget.Gallery;
import android.widget.ImageSwitcher;
import android.widget.ImageView;
import android.widget.ViewSwitcher.ViewFactory; public class MainActivity extends Activity implements OnItemSelectedListener,ViewFactory
{ private int[] resIds = new int[]
{ R.drawable.item1, R.drawable.item2, R.drawable.item3, R.drawable.item4,
R.drawable.item5, R.drawable.item6, R.drawable.item7,
R.drawable.item8, R.drawable.item9, R.drawable.item10,
R.drawable.item11, R.drawable.item12, R.drawable.item13,
R.drawable.item14, R.drawable.item15 }; private Gallery gallery;
private ImageSwitcher is;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
gallery = (Gallery) findViewById(R.id.gallery1);
is = (ImageSwitcher) findViewById(R.id.imageSwitcher1); gallery.setAdapter(new ImageAdapter(this));
//让选定的图片在中心显示
gallery.setSelection(resIds.length/);
//为Gallery绑定监听器;
gallery.setOnItemSelectedListener(new OnItemSelectedListener() {
public void onItemSelected(AdapterView<?> parent, View view,
int position, long id) {
//当在Gallery中选定一张图片是 ImageSwitcher同步显示同一张
//position%images.length 为了让图片循环显示
is.setImageResource(resIds[position%resIds.length]); }
public void onNothingSelected(AdapterView<?> parent) { }
}); is.setFactory(new ImageFactory(this)); } private class ImageAdapter extends BaseAdapter{
private Context context;
public ImageAdapter(Context context) {
this.context = context;
}
//可以return images.lenght(),在这里返回Integer.MAX_VALUE
//是为了使图片循环显示
public int getCount() {
return Integer.MAX_VALUE;
}
public Object getItem(int position) {
return null;
}
public long getItemId(int position) {
return ;
}
public View getView(int position, View convertView, ViewGroup parent) {
ImageView iv = new ImageView(context);
iv.setImageResource(resIds[position%resIds.length]);
iv.setLayoutParams(new Gallery.LayoutParams(,));
iv.setAdjustViewBounds(true);
return iv;
}
} private class ImageFactory implements ViewFactory{
private Context context;
public ImageFactory(Context context){
this.context = context;
}
public View makeView() {
ImageView iv = new ImageView(context);
iv.setLayoutParams(new ImageSwitcher.LayoutParams(,));
return iv;
}
} @Override
public View makeView() {
// TODO Auto-generated method stub
return null;
} @Override
public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
// TODO Auto-generated method stub } @Override
public void onNothingSelected(AdapterView<?> arg0) {
// TODO Auto-generated method stub }
}
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