Для изменения изображения в галерее необходимо изменить идентификатор изображения ресурсов в массиве.например, изменить изображение для видео в int [] video_pics и так далее.
import android.app.Activity;
import android.content.Context;
import android.content.res.TypedArray;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.Gallery;
import android.widget.ImageView;
import android.widget.Toast;
public class GalleryView extends Activity implements OnClickListener {
int[] image_pics = { R.drawable.cloudy, R.drawable.hazy, R.drawable.mostlycloudyday, R.drawable.partlycloud,
R.drawable.sunny, R.drawable.sunrain, R.drawable.thunderstorm, R.drawable.weathercloudy, };
int[] video_pics = { R.drawable.cloudy, R.drawable.hazy, R.drawable.mostlycloudyday, R.drawable.partlycloud,
R.drawable.sunny, R.drawable.sunrain, R.drawable.thunderstorm, R.drawable.weathercloudy, };
int[] audio_pics = { R.drawable.cloudy, R.drawable.hazy, R.drawable.mostlycloudyday, R.drawable.partlycloud,
R.drawable.sunny, R.drawable.sunrain, R.drawable.thunderstorm, R.drawable.weathercloudy, };
ImageView imageView;
Button mAudio;
Button mVideo;
Button mImages;
ImageAdapter galleryAdapter;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
mAudio = (Button) findViewById(R.id.button1);
mVideo = (Button) findViewById(R.id.button2);
mImages = (Button) findViewById(R.id.button3);
mAudio.setOnClickListener(this);
mVideo.setOnClickListener(this);
mImages.setOnClickListener(this);
Gallery ga = (Gallery) findViewById(R.id.Gallery01);
galleryAdapter = new ImageAdapter(this);
galleryAdapter.setResourseArray(image_pics);
ga.setAdapter(galleryAdapter);
imageView = (ImageView) findViewById(R.id.ImageView01);
ga.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int pos, long arg3) {
Toast.makeText(getBaseContext(), "You have selected picture " + (pos + 1) + "of Gallery", Toast.LENGTH_SHORT)
.show();
imageView.setImageResource(pics[pos]);
}
});
}
@Override
public void onClick(View view) {
if (view == mAudio) {
if (galleryAdapter != null) {
galleryAdapter.setResourseArray(audio_pics);
galleryAdapter.notifyDataSetChanged();
}
} else if (view == mVideo) {
if (galleryAdapter != null) {
galleryAdapter.setResourseArray(video_pics);
galleryAdapter.notifyDataSetChanged();
}
} else if (view == mImages) {
if (galleryAdapter != null) {
galleryAdapter.setResourseArray(image_pics);
galleryAdapter.notifyDataSetChanged();
}
}
}
public class ImageAdapter extends BaseAdapter {
private Context ctx;
int imageBackground;
private int[] resourseArray = null;
public ImageAdapter(Context c) {
ctx = c;
TypedArray ta = obtainStyledAttributes(R.styleable.Gallery1);
imageBackground = ta.getResourceId(R.styleable.Gallery1_android_galleryItemBackground, 1);
ta.recycle();
}
@Override
public int getCount() {
return resourseArray.length;
}
public int[] getResourseArray() {
return resourseArray;
}
public void setResourseArray(int[] resourseArray) {
this.resourseArray = resourseArray;
}
@Override
public Object getItem(int arg0) {
return arg0;
}
@Override
public long getItemId(int arg0) {
return arg0;
}
@Override
public View getView(int position, View arg1, ViewGroup arg2) {
ImageView iv = new ImageView(ctx);
iv.setImageResource(resourseArray[position]);
iv.setScaleType(ImageView.ScaleType.FIT_XY);
iv.setLayoutParams(new Gallery.LayoutParams(150, 120));
iv.setBackgroundResource(imageBackground);
return iv;
}
}
}