I've tried to build my app on top of a opensource project.
The basic function is to use GridView to show a couple of images.
The following is the code snippet. The comment line is the original code. In the original code, Images.imageThumbUrls is a string array of urls and the size(Images.imageThumbUrls.length) is 99.
I'd like to replace the original urls with my own version and I did. But there is an error. Please see the log.
According to the log, it seems that the limit for getView is 99(the original code). Aside from changing getCount, is there anything else I need to do?
In createView method:
mGridView.getViewTreeObserver().addOnGlobalLayoutListener(
new ViewTreeObserver.OnGlobalLayoutListener() {
@Override
public void onGlobalLayout() {
if (mAdapter.getNumColumns() == 0) {
final int numColumns = (int) Math.floor(
mGridView.getWidth() / (mImageThumbSize + mImageThumbSpacing));
if (numColumns > 0) {
final int columnWidth =
(mGridView.getWidth() / numColumns) - mImageThumbSpacing;
mAdapter.setNumColumns(numColumns);
mAdapter.setItemHeight(columnWidth);
if (BuildConfig.DEBUG) {
Log.d(TAG, "onCreateView - numColumns set to " + numColumns);
}
}
}
}
});
ImageAdapter class:
private class ImageAdapter extends BaseAdapter {
public int getCount() {
//return Images.imageThumbUrls.length + mNumColumns;
return DataStore.photosInfoOfTag.total + mNumColumns;
}
@Override
public View getView(int position, View convertView, ViewGroup container) {
// First check if this is the top row
if (position < mNumColumns) {
if (convertView == null) {
convertView = new View(mContext);
}
// Set empty view with height of ActionBar
convertView.setLayoutParams(new AbsListView.LayoutParams(
ViewGroup.LayoutParams.MATCH_PARENT, mActionBarHeight));
return convertView;
}
// Now handle the main ImageView thumbnails
ImageView imageView;
if (convertView == null) { // if it's not recycled, instantiate and initialize
imageView = new RecyclingImageView(mContext);
imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
imageView.setLayoutParams(mImageViewLayoutParams);
} else { // Otherwise re-use the converted view
imageView = (ImageView) convertView;
}
// Check the height matches our calculated column width
if (imageView.getLayoutParams().height != mItemHeight) {
imageView.setLayoutParams(mImageViewLayoutParams);
}
// Finally load the image asynchronously into the ImageView, this also takes care of
// setting a placeholder image while the background thread runs
Photo photo = DataStore.photosInfoOfTag.photo.get(position - mNumColumns);
String photoUrl = DataStore.imageUrlPart1 + Integer.toString(photo.getFarm()) +
DataStore.imageUrlPart2 + photo.getServer() + "/" +
photo.getId() + "_" + photo.getSecret() +
DataStore.imageUrlPart3;
mImageFetcher.loadImage(photoUrl, imageView);
//mImageFetcher.loadImage(Images.imageThumbUrls[position - mNumColumns], imageView);
return imageView;
}
public void setItemHeight(int height) {
if (height == mItemHeight) {
return;
}
mItemHeight = height;
mImageViewLayoutParams =
new GridView.LayoutParams(LayoutParams.MATCH_PARENT, mItemHeight);
mImageFetcher.setImageSize(height);
notifyDataSetChanged();
}
public void setNumColumns(int numColumns) {
mNumColumns = numColumns;
}
}
05-06 01:04:39.736: E/AndroidRuntime(16356): FATAL EXCEPTION: main
05-06 01:04:39.736: E/AndroidRuntime(16356):
java.lang.IndexOutOfBoundsException: Invalid index 100, size is 10005-06 01:04:39.736: E/AndroidRuntime(16356): at java.util.ArrayList.throwIndexOutOfBoundsException(ArrayList.java:251)
05-06 01:04:39.736: E/AndroidRuntime(16356): at java.util.ArrayList.get(ArrayList.java:304)
05-06 01:04:39.736: E/AndroidRuntime(16356): at com.example.android.bitmapfun.ui.ImageGridFragment$ImageAdapter.getView(ImageGridFragment.java:292)
05-06 01:04:39.736: E/AndroidRuntime(16356): at android.widget.AbsListView.obtainView(AbsListView.java:2143)
05-06 01:04:39.736: E/AndroidRuntime(16356): at android.widget.GridView.makeAndAddView(GridView.java:1341)
05-06 01:04:39.736: E/AndroidRuntime(16356): at android.widget.GridView.makeRow(GridView.java:341)
05-06 01:04:39.736: E/AndroidRuntime(16356): at android.widget.GridView.fillDown(GridView.java:283)
05-06 01:04:39.736: E/AndroidRuntime(16356): at android.widget.GridView.fillGap(GridView.java:243)
05-06 01:04:39.736: E/AndroidRuntime(16356): at android.widget.AbsListView.trackMotionScroll(AbsListView.java:4930)
05-06 01:04:39.736: E/AndroidRuntime(16356): at android.widget.AbsListView$FlingRunnable.run(AbsListView.java:4087)
05-06 01:04:39.736: E/AndroidRuntime(16356): at android.view.Choreographer$CallbackRecord.run(Choreographer.java:749)
05-06 01:04:39.736: E/AndroidRuntime(16356): at android.view.Choreographer.doCallbacks(Choreographer.java:562)
05-06 01:04:39.736: E/AndroidRuntime(16356): at android.view.Choreographer.doFrame(Choreographer.java:531)
05-06 01:04:39.736: E/AndroidRuntime(16356): at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:735)
05-06 01:04:39.736: E/AndroidRuntime(16356): at android.os.Handler.handleCallback(Handler.java:725)
05-06 01:04:39.736: E/AndroidRuntime(16356): at android.os.Handler.dispatchMessage(Handler.java:92)
05-06 01:04:39.736: E/AndroidRuntime(16356): at android.os.Looper.loop(Looper.java:137)
05-06 01:04:39.736: E/AndroidRuntime(16356): at android.app.ActivityThread.main(ActivityThread.java:5041)
05-06 01:04:39.736: E/AndroidRuntime(16356): at java.lang.reflect.Method.invokeNative(Native Method)
05-06 01:04:39.736: E/AndroidRuntime(16356): at java.lang.reflect.Method.invoke(Method.java:511)
05-06 01:04:39.736: E/AndroidRuntime(16356): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
05-06 01:04:39.736: E/AndroidRuntime(16356): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
05-06 01:04:39.736: E/AndroidRuntime(16356): at dalvik.system.NativeStart.main(Native Method)
