public class ListViewImgAdapter extends BaseAdapter {
public static final String TAG="ListViewImgAdapter";
private final int plastic_randomNum = 218947932;
private final int plastic_iconNum = 98367590;
int mGalleryItemBackground;
private Context mContext;
public int pageCount = Broker.model.issueFilter.issueShowingList().size();
public String[] mImageIds;
public ListViewImgAdapter(Context c) {
mContext = c;
}
public void updateListSize(){
pageCount = Broker.model.issueFilter.issueShowingList().size();
Log.d(TAG,"RefreshAll, have cells: "+pageCount);
}
public int getCount() {
return Broker.model.issueFilter.issueShowingList().size();
}
public Object getItem(int position) {
return position;
}
public long getItemId(int position) {
return position;
}
public View getView(int position, View convertView, ViewGroup parent) {
RelativeLayout container ;
// Log.d(TAG,"GetView. ConvertView "+position+" of "+ Broker.model.issueFilter.issueShowingList().size());
if (Broker.model.issueFilter.issueShowingList().size()<= position ) return null;
if (convertView == null) {
// Log.d(TAG,"GetView. ConvertView is null");
container = new RelativeLayout(mContext);
IRIssue theIssue = Broker.model.issueFilter.issueShowingList().get(position);
final int clickedPosition = position;
ImageButton coverImage = new ImageButton(mContext);
coverImage.setId(plastic_randomNum + position);
coverImage.setPadding(5,3,6,7);
coverImage.setBackgroundDrawable(null);
if(theIssue.thumbLocation==null ){
coverImage.setImageResource(R.raw.default_thumbnail);
}else{
if(new File(theIssue.thumbLocation).exists()){
coverImage.setImageURI( Uri.parse(theIssue.thumbLocation));
if (coverImage.getDrawable()==null){
coverImage.setImageResource(R.raw.default_thumbnail);
}
}else{
coverImage.setImageResource(R.raw.default_thumbnail);
}}
Log.d(TAG,"successfully get thumb");
RelativeLayout.LayoutParams imgparam;
DisplayMetrics outMetrics = new DisplayMetrics();
Broker.listViewActivity.getWindowManager().getDefaultDisplay().getMetrics(outMetrics);
float expectedHeight = 240 / ((float)coverImage.getDrawable().getMinimumWidth()/(float)coverImage.getDrawable().getMinimumHeight());
int expectedWidth = 240;
if (outMetrics.densityDpi==DisplayMetrics.DENSITY_XHIGH || outMetrics.densityDpi==DisplayMetrics.DENSITY_XXHIGH){
expectedWidth = 240;
imgparam = new RelativeLayout.LayoutParams(240, (int)expectedHeight);
}else{
expectedWidth = 200;
imgparam = new RelativeLayout.LayoutParams(expectedWidth, RelativeLayout.LayoutParams.WRAP_CONTENT);
}
imgparam.addRule(RelativeLayout.ALIGN_PARENT_TOP, coverImage.getId());
imgparam.addRule(RelativeLayout.CENTER_HORIZONTAL, coverImage.getId());
imgparam.setMargins(10, 20, 10, 0);
coverImage.setLayoutParams(imgparam);
coverImage.setScaleType(ImageView.ScaleType.CENTER_INSIDE);
coverImage.setAdjustViewBounds(true);
coverImage.setOnClickListener( new OnClickListener(){
public void onClick(View arg0) {
Broker.listViewActivity.ItemClick(clickedPosition);
} });
coverImage.setLongClickable(true);
coverImage.setOnLongClickListener( new OnLongClickListener(){
public boolean onLongClick(View arg0) {
Broker.listViewActivity.ItemLongClick(clickedPosition);
return true;
} });
Log.d(TAG,"Image Created");
RelativeLayout.LayoutParams relativeParams;
if (outMetrics.densityDpi==DisplayMetrics.DENSITY_XHIGH || outMetrics.densityDpi==DisplayMetrics.DENSITY_XXHIGH){
relativeParams = new RelativeLayout.LayoutParams(expectedWidth, 80);
}else{
relativeParams = new RelativeLayout.LayoutParams(expectedWidth, RelativeLayout.LayoutParams.WRAP_CONTENT);
}
TextView caption = new TextView(mContext);
relativeParams.addRule(RelativeLayout.ALIGN_RIGHT, coverImage.getId());
relativeParams.addRule(RelativeLayout.BELOW, coverImage.getId());
relativeParams.setMargins(0, 0, 0, 10);
caption.setId(plastic_iconNum+position);
caption.setTextColor(Color.BLACK);
caption.setTypeface(null,Typeface.BOLD);
caption.setTextSize(16);
caption.setGravity(Gravity.CENTER_HORIZONTAL);
caption.setText(theIssue.issueNo);
caption.setLayoutParams(relativeParams);
int iconSize = 24;
int iconMargin = 0;
if (outMetrics.densityDpi==DisplayMetrics.DENSITY_XHIGH || outMetrics.densityDpi==DisplayMetrics.DENSITY_XXHIGH){
iconSize = 36;
iconMargin = 5;
}
relativeParams = new RelativeLayout.LayoutParams(iconSize, iconSize);
ImageView statusIcon = new ImageView(mContext);
relativeParams.addRule(RelativeLayout.ALIGN_LEFT, coverImage.getId());
relativeParams.addRule(RelativeLayout.ALIGN_TOP, caption.getId());
relativeParams.setMargins(0, iconMargin, 5, 0);
statusIcon.setLayoutParams(relativeParams);
statusIcon.setAdjustViewBounds(false);
switch (theIssue.status){
case NoDownload:
statusIcon.setImageResource(R.raw.btn_media_null);
break;
case Downloading:
case DownloadStopped:
statusIcon.setImageResource(R.raw.icon_downloading);
break;
case DownloadedAndExtracted:
statusIcon.setImageResource(R.raw.icon_downloaded);
break;
default:
statusIcon.setImageResource(R.raw.btn_media_null);
}
RelativeLayout.LayoutParams layoutParams = new RelativeLayout.LayoutParams(50,50);
layoutParams.addRule(RelativeLayout.CENTER_IN_PARENT, coverImage.getId());
ProgressBar queue = new ProgressBar(mContext,null, android.R.attr.progressBarStyleLarge);
queue.setLayoutParams(layoutParams);
if (Broker.model.downloadQueue.isItQueued(theIssue.pubKey))
queue.setVisibility(View.VISIBLE);
else
queue.setVisibility(View.INVISIBLE);
layoutParams = new RelativeLayout.LayoutParams(160,10);
layoutParams.setMargins(0, 0, 0, 10);
layoutParams.addRule(RelativeLayout.ALIGN_BOTTOM, coverImage.getId());
layoutParams.addRule(RelativeLayout.CENTER_HORIZONTAL, coverImage.getId());
AkaProgressBar progress = new AkaProgressBar(mContext);
// if (theIssue.status==IRConstant.IssueVolumeStatus.DownloadStopped && IRProcess.isDownloading==null)
// progress.setProgress(0);
// else
if (theIssue.vol[0].pageCount != 0)
progress.setProgress(Math.round(((float)theIssue.progress / theIssue.vol[0].pageCount) * 10000));
progress.setLayoutParams(layoutParams);
if (theIssue.status==IRConstant.IssueVolumeStatus.Downloading )
progress.setVisibility(View.VISIBLE);
else
progress.setVisibility(View.INVISIBLE);
container.addView(coverImage);
container.addView(statusIcon);
container.addView(progress);
container.addView(caption);
container.addView(queue);
}else{
// Log.d(TAG,"GetView. ConvertView is not null");
if (Broker.listViewActivity.touchDown) return convertView;
IRIssue theIssue = Broker.model.issueFilter.issueShowingList().get(position);
container = (RelativeLayout) convertView;
for (int i =0;i<container.getChildCount();i++){
if (container.getChildAt(i).getClass()== ImageButton.class){
final int clickedPosition = position;
((ImageButton)container.getChildAt(i)).setOnClickListener( new OnClickListener(){
public void onClick(View arg0) {
Broker.listViewActivity.ItemClick(clickedPosition);
}});
((ImageButton)container.getChildAt(i)).setLongClickable(true);
((ImageButton)container.getChildAt(i)).setOnLongClickListener( new OnLongClickListener(){
public boolean onLongClick(View arg0) {
Broker.listViewActivity.ItemLongClick(clickedPosition);
return true;
}});
if(theIssue.thumbLocation==null ){
((ImageButton)container.getChildAt(i)).setImageResource(R.raw.default_thumbnail);
}else{
if(new File(theIssue.thumbLocation).exists()){
((ImageButton)container.getChildAt(i)).setImageURI( Uri.parse(theIssue.thumbLocation));
if (((ImageButton)container.getChildAt(i)).getDrawable()==null){((ImageButton)container.getChildAt(i)).setImageResource(R.raw.default_thumbnail);}
}else
((ImageButton)container.getChildAt(i)).setImageResource(R.raw.default_thumbnail);
}
// Resize the thumbnail after download complete
ImageButton downloadedCover = (ImageButton)container.getChildAt(i);
RelativeLayout.LayoutParams imgparam;
DisplayMetrics outMetrics = new DisplayMetrics();
Broker.listViewActivity.getWindowManager().getDefaultDisplay().getMetrics(outMetrics);
float expectedHeight = 240 / ((float)downloadedCover.getDrawable().getMinimumWidth()/(float)downloadedCover.getDrawable().getMinimumHeight());
int expectedWidth = 240;
if (outMetrics.densityDpi==DisplayMetrics.DENSITY_XHIGH || outMetrics.densityDpi==DisplayMetrics.DENSITY_XXHIGH){
expectedWidth = 240;
imgparam = new RelativeLayout.LayoutParams(240, (int)expectedHeight);
}else{
expectedWidth = 200;
imgparam = new RelativeLayout.LayoutParams(expectedWidth, RelativeLayout.LayoutParams.WRAP_CONTENT);
}
imgparam.addRule(RelativeLayout.ALIGN_PARENT_TOP, downloadedCover.getId());
imgparam.addRule(RelativeLayout.CENTER_HORIZONTAL, downloadedCover.getId());
imgparam.setMargins(10, 20, 10, 0);
downloadedCover.setLayoutParams(imgparam);
downloadedCover.setScaleType(ImageView.ScaleType.CENTER_INSIDE);
downloadedCover.setAdjustViewBounds(true);
}else if (container.getChildAt(i).getClass()== TextView.class){
((TextView)container.getChildAt(i)).setText(theIssue.issueNo);
}else if (container.getChildAt(i).getClass()== AkaProgressBar.class){
//((AkaProgressBar)container.getChildAt(i)).setProgress(theIssue.progress);
if (theIssue.vol[0].pageCount != 0)
((AkaProgressBar) container.getChildAt(i)).setProgress(Math.round(((float)theIssue.progress / theIssue.vol[0].pageCount) * 10000));
if (theIssue.status==IRConstant.IssueVolumeStatus.Downloading )
((AkaProgressBar)container.getChildAt(i)).setVisibility(View.VISIBLE);
else
((AkaProgressBar)container.getChildAt(i)).setVisibility(View.INVISIBLE);
}else if (container.getChildAt(i).getClass()== ImageView.class){
switch (theIssue.status){
case NoDownload:
((ImageView)container.getChildAt(i)).setImageResource(R.raw.btn_media_null);
break;
case Downloading:
case DownloadStopped:
((ImageView)container.getChildAt(i)).setImageResource(R.raw.icon_downloading);
break;
case DownloadedAndExtracted:
((ImageView)container.getChildAt(i)).setImageResource(R.raw.icon_downloaded);
break;
default:
((ImageView)container.getChildAt(i)).setImageResource(R.raw.btn_media_null);
}
}else if (container.getChildAt(i).getClass()== ProgressBar.class){
if (Broker.model.downloadQueue.isItQueued(theIssue.pubKey))
((ProgressBar)container.getChildAt(i)).setVisibility(View.VISIBLE);
else
((ProgressBar)container.getChildAt(i)).setVisibility(View.INVISIBLE);
}
}
}
container.setId(position);
return container;
}
}
上面的代码是一个自定义适配器类，我使用Broker.model.issueFilter.issueShowingList()来获取数组列表和Broker.model.issueFilter.issueShowingList（）。getIRIssue来获取对象
问题是，我想简单地忽略第一项并从第二项开始，如何实现这一点（不删除列表中的第一项）？
由于
答案 0 :(得分：1)
将getCount()更改为返回尺寸-1
public int getCount() {
return Broker.model.issueFilter.issueShowingList().size() - 1;
}
并在getView()函数中将位置参数增加1
public View getView(int position, View convertView, ViewGroup parent) {
position++;
RelativeLayout container ;
// you dont need this line of code, android will make sure to call getView() in range of 0 to getCount()
// plus return nul in getView will case your app to crash :)
// if (Broker.model.issueFilter.issueShowingList().size()<= position ) return null;
}
答案 1 :(得分：0)
非常简单只需进入创建视图并检查位置1并且不执行任何操作并且其他情况执行所有活动。像 -
public View getView(int position, View convertView, ViewGroup parent) {
if(position==1){//please check position is start from 0 or 1
//do nothing
}
else{
//paste all code here
RelativeLayout container ;
// Log.d(TAG,"GetView. ConvertView "+position+" of "+ Broker.model.issueFilter.issueShowingList().size());
if (Broker.model.issueFilter.issueShowingList().size()<= position ) return null;
if (convertView == null) {
// Log.d(TAG,"GetView. ConvertView is null");
container = new RelativeLayout(mContext);
IRIssue theIssue = Broker.model.issueFilter.issueShowingList().get(position);
final int clickedPosition = position;
ImageButton coverImage = new ImageButton(mContext);
coverImage.setId(plastic_randomNum + position);
coverImage.setPadding(5,3,6,7);
coverImage.setBackgroundDrawable(null);
if(theIssue.thumbLocation==null ){
coverImage.setImageResource(R.raw.default_thumbnail);
}else{
if(new File(theIssue.thumbLocation).exists()){
coverImage.setImageURI( Uri.parse(theIssue.thumbLocation));
if (coverImage.getDrawable()==null){
coverImage.setImageResource(R.raw.default_thumbnail);
}
}else{
coverImage.setImageResource(R.raw.default_thumbnail);
}}
Log.d(TAG,"successfully get thumb");
RelativeLayout.LayoutParams imgparam;
DisplayMetrics outMetrics = new DisplayMetrics();
Broker.listViewActivity.getWindowManager().getDefaultDisplay().getMetrics(outMetrics);
float expectedHeight = 240 / ((float)coverImage.getDrawable().getMinimumWidth()/(float)coverImage.getDrawable().getMinimumHeight());
int expectedWidth = 240;
if (outMetrics.densityDpi==DisplayMetrics.DENSITY_XHIGH || outMetrics.densityDpi==DisplayMetrics.DENSITY_XXHIGH){
expectedWidth = 240;
imgparam = new RelativeLayout.LayoutParams(240, (int)expectedHeight);
}else{
expectedWidth = 200;
imgparam = new RelativeLayout.LayoutParams(expectedWidth, RelativeLayout.LayoutParams.WRAP_CONTENT);
}
imgparam.addRule(RelativeLayout.ALIGN_PARENT_TOP, coverImage.getId());
imgparam.addRule(RelativeLayout.CENTER_HORIZONTAL, coverImage.getId());
imgparam.setMargins(10, 20, 10, 0);
coverImage.setLayoutParams(imgparam);
coverImage.setScaleType(ImageView.ScaleType.CENTER_INSIDE);
coverImage.setAdjustViewBounds(true);
coverImage.setOnClickListener( new OnClickListener(){
public void onClick(View arg0) {
Broker.listViewActivity.ItemClick(clickedPosition);
} });
coverImage.setLongClickable(true);
coverImage.setOnLongClickListener( new OnLongClickListener(){
public boolean onLongClick(View arg0) {
Broker.listViewActivity.ItemLongClick(clickedPosition);
return true;
} });
Log.d(TAG,"Image Created");
RelativeLayout.LayoutParams relativeParams;
if (outMetrics.densityDpi==DisplayMetrics.DENSITY_XHIGH || outMetrics.densityDpi==DisplayMetrics.DENSITY_XXHIGH){
relativeParams = new RelativeLayout.LayoutParams(expectedWidth, 80);
}else{
relativeParams = new RelativeLayout.LayoutParams(expectedWidth, RelativeLayout.LayoutParams.WRAP_CONTENT);
}
TextView caption = new TextView(mContext);
relativeParams.addRule(RelativeLayout.ALIGN_RIGHT, coverImage.getId());
relativeParams.addRule(RelativeLayout.BELOW, coverImage.getId());
relativeParams.setMargins(0, 0, 0, 10);
caption.setId(plastic_iconNum+position);
caption.setTextColor(Color.BLACK);
caption.setTypeface(null,Typeface.BOLD);
caption.setTextSize(16);
caption.setGravity(Gravity.CENTER_HORIZONTAL);
caption.setText(theIssue.issueNo);
caption.setLayoutParams(relativeParams);
int iconSize = 24;
int iconMargin = 0;
if (outMetrics.densityDpi==DisplayMetrics.DENSITY_XHIGH || outMetrics.densityDpi==DisplayMetrics.DENSITY_XXHIGH){
iconSize = 36;
iconMargin = 5;
}
relativeParams = new RelativeLayout.LayoutParams(iconSize, iconSize);
ImageView statusIcon = new ImageView(mContext);
relativeParams.addRule(RelativeLayout.ALIGN_LEFT, coverImage.getId());
relativeParams.addRule(RelativeLayout.ALIGN_TOP, caption.getId());
relativeParams.setMargins(0, iconMargin, 5, 0);
statusIcon.setLayoutParams(relativeParams);
statusIcon.setAdjustViewBounds(false);
switch (theIssue.status){
case NoDownload:
statusIcon.setImageResource(R.raw.btn_media_null);
break;
case Downloading:
case DownloadStopped:
statusIcon.setImageResource(R.raw.icon_downloading);
break;
case DownloadedAndExtracted:
statusIcon.setImageResource(R.raw.icon_downloaded);
break;
default:
statusIcon.setImageResource(R.raw.btn_media_null);
}
RelativeLayout.LayoutParams layoutParams = new RelativeLayout.LayoutParams(50,50);
layoutParams.addRule(RelativeLayout.CENTER_IN_PARENT, coverImage.getId());
ProgressBar queue = new ProgressBar(mContext,null, android.R.attr.progressBarStyleLarge);
queue.setLayoutParams(layoutParams);
if (Broker.model.downloadQueue.isItQueued(theIssue.pubKey))
queue.setVisibility(View.VISIBLE);
else
queue.setVisibility(View.INVISIBLE);
layoutParams = new RelativeLayout.LayoutParams(160,10);
layoutParams.setMargins(0, 0, 0, 10);
layoutParams.addRule(RelativeLayout.ALIGN_BOTTOM, coverImage.getId());
layoutParams.addRule(RelativeLayout.CENTER_HORIZONTAL, coverImage.getId());
AkaProgressBar progress = new AkaProgressBar(mContext);
// if (theIssue.status==IRConstant.IssueVolumeStatus.DownloadStopped && IRProcess.isDownloading==null)
// progress.setProgress(0);
// else
if (theIssue.vol[0].pageCount != 0)
progress.setProgress(Math.round(((float)theIssue.progress / theIssue.vol[0].pageCount) * 10000));
progress.setLayoutParams(layoutParams);
if (theIssue.status==IRConstant.IssueVolumeStatus.Downloading )
progress.setVisibility(View.VISIBLE);
else
progress.setVisibility(View.INVISIBLE);
container.addView(coverImage);
container.addView(statusIcon);
container.addView(progress);
container.addView(caption);
container.addView(queue);
}else{
// Log.d(TAG,"GetView. ConvertView is not null");
if (Broker.listViewActivity.touchDown) return convertView;
IRIssue theIssue = Broker.model.issueFilter.issueShowingList().get(position);
container = (RelativeLayout) convertView;
for (int i =0;i<container.getChildCount();i++){
if (container.getChildAt(i).getClass()== ImageButton.class){
final int clickedPosition = position;
((ImageButton)container.getChildAt(i)).setOnClickListener( new OnClickListener(){
public void onClick(View arg0) {
Broker.listViewActivity.ItemClick(clickedPosition);
}});
((ImageButton)container.getChildAt(i)).setLongClickable(true);
((ImageButton)container.getChildAt(i)).setOnLongClickListener( new OnLongClickListener(){
public boolean onLongClick(View arg0) {
Broker.listViewActivity.ItemLongClick(clickedPosition);
return true;
}});
if(theIssue.thumbLocation==null ){
((ImageButton)container.getChildAt(i)).setImageResource(R.raw.default_thumbnail);
}else{
if(new File(theIssue.thumbLocation).exists()){
((ImageButton)container.getChildAt(i)).setImageURI( Uri.parse(theIssue.thumbLocation));
if (((ImageButton)container.getChildAt(i)).getDrawable()==null){((ImageButton)container.getChildAt(i)).setImageResource(R.raw.default_thumbnail);}
}else
((ImageButton)container.getChildAt(i)).setImageResource(R.raw.default_thumbnail);
}
// Resize the thumbnail after download complete
ImageButton downloadedCover = (ImageButton)container.getChildAt(i);
RelativeLayout.LayoutParams imgparam;
DisplayMetrics outMetrics = new DisplayMetrics();
Broker.listViewActivity.getWindowManager().getDefaultDisplay().getMetrics(outMetrics);
float expectedHeight = 240 / ((float)downloadedCover.getDrawable().getMinimumWidth()/(float)downloadedCover.getDrawable().getMinimumHeight());
int expectedWidth = 240;
if (outMetrics.densityDpi==DisplayMetrics.DENSITY_XHIGH || outMetrics.densityDpi==DisplayMetrics.DENSITY_XXHIGH){
expectedWidth = 240;
imgparam = new RelativeLayout.LayoutParams(240, (int)expectedHeight);
}else{
expectedWidth = 200;
imgparam = new RelativeLayout.LayoutParams(expectedWidth, RelativeLayout.LayoutParams.WRAP_CONTENT);
}
imgparam.addRule(RelativeLayout.ALIGN_PARENT_TOP, downloadedCover.getId());
imgparam.addRule(RelativeLayout.CENTER_HORIZONTAL, downloadedCover.getId());
imgparam.setMargins(10, 20, 10, 0);
downloadedCover.setLayoutParams(imgparam);
downloadedCover.setScaleType(ImageView.ScaleType.CENTER_INSIDE);
downloadedCover.setAdjustViewBounds(true);
}else if (container.getChildAt(i).getClass()== TextView.class){
((TextView)container.getChildAt(i)).setText(theIssue.issueNo);
}else if (container.getChildAt(i).getClass()== AkaProgressBar.class){
//((AkaProgressBar)container.getChildAt(i)).setProgress(theIssue.progress);
if (theIssue.vol[0].pageCount != 0)
((AkaProgressBar) container.getChildAt(i)).setProgress(Math.round(((float)theIssue.progress / theIssue.vol[0].pageCount) * 10000));
if (theIssue.status==IRConstant.IssueVolumeStatus.Downloading )
((AkaProgressBar)container.getChildAt(i)).setVisibility(View.VISIBLE);
else
((AkaProgressBar)container.getChildAt(i)).setVisibility(View.INVISIBLE);
}else if (container.getChildAt(i).getClass()== ImageView.class){
switch (theIssue.status){
case NoDownload:
((ImageView)container.getChildAt(i)).setImageResource(R.raw.btn_media_null);
break;
case Downloading:
case DownloadStopped:
((ImageView)container.getChildAt(i)).setImageResource(R.raw.icon_downloading);
break;
case DownloadedAndExtracted:
((ImageView)container.getChildAt(i)).setImageResource(R.raw.icon_downloaded);
break;
default:
((ImageView)container.getChildAt(i)).setImageResource(R.raw.btn_media_null);
}
}else if (container.getChildAt(i).getClass()== ProgressBar.class){
if (Broker.model.downloadQueue.isItQueued(theIssue.pubKey))
((ProgressBar)container.getChildAt(i)).setVisibility(View.VISIBLE);
else
((ProgressBar)container.getChildAt(i)).setVisibility(View.INVISIBLE);
}
}
}
container.setId(position);
return container;
}
}
答案 2 :(得分：0)
你可以简单地使用布尔标志
if(first)
{
first = false;
}
else
{
//do something
}