0
点赞
收藏
分享

微信扫一扫

Gallery 画廊效果


 
1.首先创建实现OnItemSelectedListener,ViewFactory类。
2.创建ImageAdapter类。
3.Activity类。
MyOnItemSelectedListener:当Gallery被选择的时候,把被选择的图片放到ImageSwitch里面去。
MyImageAdapter:实现Gallery显示的图片。
ViewFactory:ImageSwitch的显示工厂。

main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/hello" />
<Gallery
android:id="@+id/gallery1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="30dp"/>

<ImageSwitcher android:id="@+id/imageswitcher1"
android:layout_height="fill_parent"
android:layout_width="fill_parent"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true">
</ImageSwitcher>
</LinearLayout>



MyOnItemSelectedListener.java


-----------------------


package com.gallery;

import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.ImageSwitcher;

public class MyOnItemSelectedListener implements OnItemSelectedListener{
private ImageSwitcher imageswitcher1;
private int[] images;

public MyOnItemSelectedListener(ImageSwitcher imageswitcher1,int[] images){
this.imageswitcher1 = imageswitcher1;
this.images = images;

}
@Override
public void onItemSelected(AdapterView<?> arg0, View arg1, int position,
long arg3) {
// 第2点改进,通过取余来循环取得images数组中的图像资源ID
imageswitcher1.setImageResource(images[position % images.length]);

}

@Override
public void onNothingSelected(AdapterView<?> arg0) {
// TODO Auto-generated method stub

}
}



MyImageAdapter.java


----------------------


package com.gallery;

import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.Gallery;
import android.widget.ImageView;

public class MyImageAdapter extends BaseAdapter {

public Context context;
private int[] images;
public MyImageAdapter(Context context,int[]images){
this.context = context;
this.images = images;
}
@Override
public int getCount() {
//获得图片的总数,这里设定为最大值,是为了模拟循环显示
return Integer.MAX_VALUE;
}

@Override
public Object getItem(int arg0) {
return null;
}

@Override
public long getItemId(int position) {
return 0;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
ImageView imageView = new ImageView(context);
// 第2点改进,通过取余来循环取得images数组中的图像资源ID
imageView.setImageResource(images[position % images.length]);
imageView.setScaleType(ImageView.ScaleType.FIT_XY);
imageView.setLayoutParams(new Gallery.LayoutParams(100, 100));
//imageView.setBackgroundResource(mGalleryItemBackground);
return imageView;
}

}




ViewFactory类


-----------------------


package com.gallery;

import android.app.ActionBar.LayoutParams;
import android.content.Context;
import android.view.View;
import android.widget.ImageSwitcher;
import android.widget.ImageView;
import android.widget.ViewSwitcher.ViewFactory;

public class MyViewFactory implements ViewFactory {

private Context context;

public MyViewFactory(Context context){
this.context = context;
}
@Override
public View makeView() {
ImageView i = new ImageView(context);
i.setBackgroundColor(0xFF000000);
i.setScaleType(ImageView.ScaleType.FIT_CENTER);
i.setLayoutParams(new ImageSwitcher.LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));
return i;
}

}



Activity类


---------------------------


package com.gallery;

import android.app.Activity;
import android.os.Bundle;
import android.view.animation.AnimationUtils;
import android.widget.Gallery;
import android.widget.ImageSwitcher;

public class MyGalleryActivity extends Activity{
private Gallery gallery1;
private ImageSwitcher imageswitcher1;
private int[] images = new int[] { R.drawable.android0001, R.drawable.android0002, R.drawable.android0003, R.drawable.android0004, R.drawable.android0005, R.drawable.android0006, R.drawable.android0007, R.drawable.android0008 };

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);

imageswitcher1 = (ImageSwitcher)findViewById(R.id.imageswitcher1);
imageswitcher1.setFactory(new MyViewFactory(MyGalleryActivity.this));
imageswitcher1.setInAnimation(AnimationUtils.loadAnimation(this, android.R.anim.fade_in));
imageswitcher1.setOutAnimation(AnimationUtils.loadAnimation(this, android.R.anim.fade_out));

gallery1 = (Gallery)findViewById(R.id.gallery1);
gallery1.setAdapter(new MyImageAdapter(this,images));
gallery1.setOnItemSelectedListener(new MyOnItemSelectedListener(imageswitcher1,images));
}

}

举报

相关推荐

0 条评论