As documented by Google, the Gallery class was deprecated in API level 16. This widget is no longer supported. Other horizontally scrolling widgets include HorizontalScrollView and ViewPager from the support library. So I used ViewPager as an alternative to the Gallery class.
My goal to finally achieve an infinite scrolling image ViewPager with text descriptions. I used the below code to achieve the image ViewPager with text describing each image but how do I apply Infinite Scrolling to a ViewPager?
I have not worked with ViewPager before so please try to provide detailed code if possible.
activity_main.xml:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical">
<android.support.v4.view.ViewPager
android:id="@+id/myimagepager"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</LinearLayout>
custom_pager.xml:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:gravity="center_horizontal">
<ImageView
android:id="@+id/myimage"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_margin="5dp"
android:layout_weight="2" />
<TextView
android:id="@+id/image_text"
android:layout_width="fill_parent"
android:layout_height="0dp"
android:layout_weight="1"/>
</LinearLayout>
ImagePager:
public class ImagePager extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ImagePagerAdapter adapter = new ImagePagerAdapter(this, imageArra, stringArray );
ViewPager myPager = (ViewPager) findViewById(R.id.myimagepager);
myPager.setAdapter(adapter);
myPager.setCurrentItem(0);
}
private int imageArra[] = { R.drawable.a, R.drawable.b,R.drawable.c,
R.drawable.d,R.drawable.e,R.drawable.f,
R.drawable.g, R.drawable.h, R.drawable.i};
private String[] stringArray = new String[] { "Image a", "Image b","Image c"
"Image d","Image e","Image f",
"Image g","Image h","Image i"};
}
ImagePagerAdapter:
public class ImagePagerAdapter extends PagerAdapter {
Activity activity;
int imageArray[];
String[] stringArray;
public ImagePagerAdapter(Activity act, int[] imgArra, String[] stringArra) {
imageArray = imgArra;
activity = act;
stringArray = stringArra;
}
public int getCount() {
return imageArray.length;
}
public Object instantiateItem(View collection, int position) {
LayoutInflater inflater = (LayoutInflater)collection.getContext
().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View layout = inflater.inflate(R.layout.custom_pager, null);
ImageView im=(ImageView) layout.findViewById(R.id.myimage);
im.setImageResource(imageArray[position]);
TextView txt=(TextView) layout.findViewById(R.id.image_text);
txt.setText(stringArray[position]);
((ViewPager) collection).addView(layout, 0);
return layout;
}
@Override
public void destroyItem(View arg0, int arg1, Object arg2) {
((ViewPager) arg0).removeView((View) arg2);
}
@Override
public boolean isViewFromObject(View arg0, Object arg1) {
return arg0 == ((View) arg1);
}
@Override
public Parcelable saveState() {
return null;
}
}
