I am working on a custom launcher application. For this reason I created a custom GridView that displays all installed applications.
The problem is that when I scroll through the apps, the gridview has a weird behavior. Sometimes it will break the horizontal alignment because of a multiline application name. Sometimes the scrolling bounds go crazy and you end up scrolling outside the gridview.
Here is a video of the problems I describe above.
I am using the following code.
public class CustomGridView extends BaseAdapter{
private Context mContext;
private List<Application> app;
public CustomGridView(Context c, List<Application> app) {
super();
mContext = c;
this.app = app;
}
#Override
public int getCount() {
return app.size();
}
#Override
public Object getItem(int position) {
return app.get(position).appPkg;
}
#Override
public long getItemId(int position) {
return 0;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder view;
if (convertView == null) {
LayoutInflater inflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.grid_item, null);
view = new ViewHolder();
view.appName = (TextView) convertView.findViewById(R.id.grid_text);
view.appIcon = (ImageView) convertView.findViewById(R.id.grid_image);
convertView.setTag(view);
} else {
view = (ViewHolder) convertView.getTag();
}
view.appName.setText(app.get(position).appName);
view.appIcon.setImageDrawable(app.get(position).appIcon);
return convertView;
}
static class ViewHolder
{
ImageView appIcon;
TextView appName;
}
}
For the grid_item I use the following.
<?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"
android:padding="10dp"
android:layout_marginBottom="10dp"
android:gravity="fill_horizontal|center_horizontal">
<ImageView
android:layout_height="62dp"
android:id="#+id/grid_image"
android:layout_width="62dp"
android:layout_gravity="center_horizontal"/>
<TextView
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:id="#+id/grid_text"
android:layout_marginTop="2dp"
android:textSize="12sp"
android:ellipsize="marquee"
android:gravity="center|center_horizontal" android:textAlignment="center"
android:layout_gravity="center_horizontal"/>
</LinearLayout>
And here is the activity layout
<GridView
android:id="#+id/gridView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:columnWidth="80dp"
android:gravity="center"
android:numColumns="auto_fit"
android:stretchMode="columnWidth" android:layout_marginLeft="5dp" android:layout_marginRight="5dp"
android:layout_alignParentEnd="true"
android:layout_alignParentBottom="true" android:layout_alignParentTop="true">
</GridView>
The problem with the height of TextView. So, make TextView single line like:
android:singleLine="true"
or, If u want 2 or 3 lines for some of the items, then make all the items have 2 or 3 lines like:
android:minLines="2"
Related
I made a ListView with a custom adapter with my own layout, and on this layout there is a text view, a button and three image buttons that are at first with setVisibility.GONE
I am trying to animate this button for when the user clicks on it, it changes its position from right to left to give space for the three image buttons.
The problem is, the only item in which the animation is working is the last item on the list. I want the animation to work in all of the items.
Here's the code for my adapter:
public class ListaAdapter extends BaseAdapter implements ListAdapter {
private ArrayList<String> list = new ArrayList<String>();
private Context context;
private ListView lista;
private Button btnAbrir;
private RelativeLayout relativeLayout;
private ObjectAnimator animation;
public ListaAdapter (ArrayList<String> list, Context context, ListView a) {
this.list = list;
this.context = context;
this.lista = a;
}
#Override
public int getCount() {
return list.size();
}
#Override
public Object getItem(int pos) {
return list.get(pos);
}
#Override
public long getItemId(int pos) {
return 0;
//just return 0 if your list items do not have an Id variable.
}
#Override
public View getView(final int position, View convertView, ViewGroup
parent)
{
View view = convertView;
if (view == null) {
LayoutInflater inflater = (LayoutInflater)
context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
view = inflater.inflate(R.layout.custom_list, null);
}
TextView listItemText = (TextView)view.findViewById(R.id.textoItem);
listItemText.setText(list.get(position));
final LinearLayout btnLayout = (LinearLayout)
view.findViewById(R.id.btnLayout);
relativeLayout = (RelativeLayout) view.findViewById(R.id.layout);
btnAbrir = (Button)view.findViewById(R.id.btnAbrir);
ImageButton btnNaoSei = (ImageButton)view.findViewById(R.id.btnNaoSei);
ImageButton btnAceitar =
(ImageButton)view.findViewById(R.id.btnAceitar);
ImageButton btnNegar = (ImageButton)view.findViewById(R.id.btnNegar);
animation = ObjectAnimator.ofFloat(btnAbrir,"x",200);
btnLayout.setVisibility(View.GONE);
btnAbrir.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
btnLayout.setVisibility(View.VISIBLE);
animate();
}
});
return view;
}
private void animate()
{
animation.setDuration(500);
animation.start();
}
}
And this is my custom_list.xml layout:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
android:animateLayoutChanges="true">
<RelativeLayout
android:id="#+id/layout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_alignParentTop="true"
android:background="#color/white">
<LinearLayout
android:id="#+id/btnLayout"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentEnd="true"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:orientation="horizontal">
<RelativeLayout
android:layout_width="#dimen/_32sdp"
android:layout_height="#dimen/_50sdp"
android:background="#color/compras_barra">
<ImageButton
android:id="#+id/btnNaoSei"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="false"
android:layout_alignParentStart="false"
android:layout_alignParentTop="false"
android:backgroundTint="#color/compras_barra"
android:contextClickable="false"
app:srcCompat="#drawable/a12" />
<TextView
android:id="#+id/textView11"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/btnNaoSei"
android:layout_centerHorizontal="true"
android:text="NÃO SEI"
android:textColor="#color/white"
android:textSize="8sp" />
</RelativeLayout>
<RelativeLayout
android:layout_width="#dimen/_32sdp"
android:layout_height="#dimen/_50sdp"
android:background="#color/compras">
<ImageButton
android:id="#+id/btnAceitar"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="11dp"
android:background="#color/compras"
app:srcCompat="#drawable/a11" />
<TextView
android:id="#+id/textView12"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentEnd="true"
android:layout_alignParentRight="true"
android:layout_below="#+id/btnAceitar"
android:paddingEnd="#dimen/_3sdp"
android:paddingTop="#dimen/_8sdp"
android:text="ACEITAR"
android:textColor="#color/white"
android:textSize="8sp" />
</RelativeLayout>
<RelativeLayout
android:layout_width="#dimen/_32sdp"
android:layout_height="#dimen/_50sdp"
android:background="#color/compras_texto2">
<ImageButton
android:id="#+id/btnNegar"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="10dp"
android:background="#color/compras_texto2"
app:srcCompat="#drawable/a10" />
<TextView
android:id="#+id/textView13"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:layout_marginBottom="12dp"
android:paddingBottom="#dimen/_1sdp"
android:text="NEGAR"
android:textColor="#color/white"
android:textSize="8sp" />
</RelativeLayout>
</LinearLayout>
<Button
android:id="#+id/btnAbrir"
android:layout_width="30dp"
android:layout_height="30dp"
android:background="#drawable/a09"
android:layout_alignTop="#+id/textoItem"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true" />
<TextView
android:id="#+id/textoItem"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="#dimen/_10sdp"
android:layout_marginTop="#dimen/_10sdp"
android:maxWidth="200dp"
android:text="TextView"
android:textColor="#color/compras_texto2" />
</RelativeLayout>
Any idea on how to accomplish this? Thanks in advance.
The things you need to adopt the following method and create a ViewHolder so that your adapter will know each element of each row in the List
The last UI element of the row only animates because this the only last known id of components for your Adapater when he was creating the Views in your List. So it will animates for the last row elements
You have to add ViewHolder nested class inside your Adapter and declare your UI components. Use setTag and getTag methods inside the getView
Overall you have to create your adapter things like this in getView
public class SListAdapter extends ArrayAdapter<String> {
private Context context;
private String[] seCtnColors;
private List<Subscription> item;
private ViewHolder mainViewHolder = null;
private ViewHolder viewHolder;
private LayoutInflater inflater;
private View row;
public SListAdapter(Context c, List<Subscription> subscriptions)
{
super(c, R.layout.row,R.id.rowNameTV);
this.context=c;
this.item = subscriptions;
}
#Override
public int getCount() {
return this.item.size();
}
#Override
public View getView(final int position, final View convertView, ViewGroup parent) {
row = null;
inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
row = inflater.inflate(R.layout.row,parent,false);
viewHolder = new ViewHolder();
initAdapterUI();
setAdapterDataset(position);
return row;
}
private void initAdapterUI() {
viewHolder.animatedGifViewHol = row.findViewById(R.id.row_animated_gif);
viewHolder.alertBarVerticalViewHol = row.findViewById(R.id.alertBarVerticalView);
viewHolder.firstNameTVHol = (TextView) row.findViewById(R.id.rowNameTV);
viewHolder.phoneNumberTVHol = (TextView) row.findViewById(R.id.rowNumberTV);
viewHolder.switchStateTVHol = (TextView) row.findViewById(R.id.switchStateTV);
row.setTag(viewHolder);
}
private void setAdapterDataset(int position) {
mainViewHolder = (ViewHolder) row.getTag();
mainViewHolder.alertBarVerticalViewHol.setBackgroundColor(Color.RED);
mainViewHolder.switchStateTVHol.setTextColor(Color.RED);
mainViewHolder.firstNameTVHol.setText(item.get(position).getFirstName());
mainViewHolder.phoneNumberTVHol.setText(item.get(position).getNumber());
}
public class ViewHolder{
View animatedGifViewHol;
View alertBarVerticalViewHol;
TextView firstNameTVHol;
TextView switchStateTVHol;
TextView phoneNumberTVHol;
}
}
I have a rather simple layout that I am intending on using for basic chat in a fragment, but scrolling through the ListView requires me to place one finger on the screen on an item in the ListView and then scroll up or down with another finger. I was under the impression that a ListView should only require a single finger/touch to be able to scroll. Is there something I am overlooking in my layout, adapter or even potentially the code I am using to populate the adapter with?
Chat Layout XML
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#FFFFFF" >
<ListView
android:id="#+id/msgListView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_above="#+id/form"
android:divider="#null"
android:dividerHeight="0dp"
android:scrollbarSize="3dp"
android:scrollbarStyle="outsideOverlay"
android:scrollbars="vertical"
android:scrollingCache="true"
android:smoothScrollbar="true"
android:paddingBottom="10dp" />
<LinearLayout
android:id="#+id/form"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:background="#color/primary"
android:orientation="horizontal"
android:paddingBottom="2dp" >
<EditText
android:id="#+id/messageEditText"
android:layout_width="252dp"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:layout_alignTop="#+id/button1"
android:layout_toLeftOf="#+id/sendMessageButton"
android:layout_weight="0.72"
android:ems="10"
android:maxHeight="80dp" />
<ImageButton
android:id="#+id/sendMessageButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:background="#drawable/chat_send_button" />
</LinearLayout>
</RelativeLayout>
ListView Adapter
public class ChatMessageAdapter extends BaseAdapter {
private static LayoutInflater inflater = null;
ArrayList<ChatMessage> chatMessageList;
public ChatMessageAdapter(Activity activity, ArrayList<ChatMessage> list) {
chatMessageList = list;
inflater = (LayoutInflater) activity
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
#Override
public int getCount() {
return chatMessageList.size();
}
#Override
public Object getItem(int position) {
return position;
}
#Override
public long getItemId(int position) {
return position;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
ChatMessage message = chatMessageList.get(position);
View vi = convertView;
if (convertView == null)
vi = inflater.inflate(R.layout.chat_bubble, null);
TextView msg = (TextView) vi.findViewById(R.id.message_text);
msg.setText(message.body);
TextView dateTime = (TextView) vi.findViewById(R.id.msgDateTime);
dateTime.setText(message.dateTime);
LinearLayout layout = (LinearLayout) vi
.findViewById(R.id.bubble_layout);
LinearLayout parent_layout = (LinearLayout) vi
.findViewById(R.id.bubble_layout_parent);
// if message is mine then align to right
if (message.isMine) {
layout.setBackgroundResource(R.drawable.bubble2);
parent_layout.setGravity(Gravity.RIGHT);
}
// If not mine then align to left
else {
layout.setBackgroundResource(R.drawable.bubble1);
parent_layout.setGravity(Gravity.LEFT);
}
msg.setTextColor(Color.BLACK);
return vi;
}
public void add(ChatMessage object) {
chatMessageList.add(object);
}
}
I had the same problem!
If you're using the navigation drawer, in the app_bar_main.xml change the CoordinatorLayout for the NestedScrollView
and then in your fragment in the scrollView set android:nestedScrollingEnabled="true"
I have to implement Horizontal scroll view for Child elements of ExpandableListView, now the child elements are shown in Vertical orientation.
<ExpandableListView android:id="#+id/myGroupListView"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_margin="10dp"
android:divider="#color/navDrawerIcon"
android:dividerHeight="1dp" />
item_group.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:id="#+id/userImage"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical|left"
android:src="#drawable/ic_account_circle_808088_36dp"
android:paddingTop="5dp"
android:paddingBottom="10dp"
android:paddingLeft="5dp"
android:paddingRight="20dp" />
<TextView
android:id="#+id/groupMemberList"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Group Member"
android:gravity="left"
android:paddingTop="15dp"
android:paddingBottom="10dp"
android:paddingLeft="50dp"
android:paddingRight="20dp"
android:textColor="#color/primary" />
</RelativeLayout>
item_group_child.xml
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal">
<ImageView
android:id="#+id/sharedCardImage"
android:layout_width="#dimen/image_card_xsmall_width"
android:layout_height="#dimen/image_card_xsmall_height"/>
<TextView
android:id="#+id/sharedBalAmount"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignBottom="#+id/sharedCardImage"
android:text="TextView"
android:textSize="#dimen/text_size_small"
android:textColor="#color/primary"
android:textAlignment="center"
android:gravity="center" />
</LinearLayout>
I tried to change the item_group_child.xml LinearLayout orientation into horizontal, but no luck.
item_group.xml should be displayed in vertical way, it works, item_group_child.xml should be horizontal way, so the user can scroll child items horizontally. Is there any way to achieve this?
Not with a stock ExpandableListView. ExpandableListView is just a regular vertical ListView where the ExpandableListAdapter handles adding/removing the list items based on the group expand/collapse events.
If you want horizontally scrolling children, then you need to set up your ExpandableListAdapter so that each group has just one possible child view, and when that child view is created, it has a horizontal scrolling view that will contain all the group's children.
Yes, You can achieve this with CustomHorizontalListView. see this link. Just Implement it on your getChildView(). I am just customize my horizontalListView from above link. see following code:
This is your group_child_item.xml
<com.customlayout.HorizontalListView
android:id="#+id/horizontalListView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#color/gray_d7"
android:padding="20dp"
xmlns:android="http://schemas.android.com/apk/res/android">
</com.customlayout.HorizontalListView>
Now inflate above xml into your getChildView():
#Override
public View getChildView(int groupPosition, int childPosition, boolean isLastchild, View convertView, ViewGroup parent)
{
ChildHolder childHolder = null;
if (convertView == null)
{
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.group_child_item, null, false);
childHolder = new ChildHolder();
childHolder.horizontalListView = (HorizontalListView) convertView.findViewById(R.id.horizontalListView);
convertView.setTag(childHolder);
}
else
{
childHolder = (ChildHolder) convertView.getTag();
}
HorizontalListViewAdapter horizontalListAdapter = new ModuleRoomHorizontalListAdapter(context, groupList, groupPosition);
ChildHolder.horizontalListView.setAdapter(horizontalListAdapter);
return convertView;
}
private static class ChildHolder
{
HorizontalListView horizontalListView;
}
Now implement your item_group_child.xml file for horizontalListViewChild and inflate in getView of HorizontalListAdapter
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal">
<ImageView
android:id="#+id/sharedCardImage"
android:layout_width="#dimen/image_card_xsmall_width"
android:layout_height="#dimen/image_card_xsmall_height"/>
<TextView
android:id="#+id/sharedBalAmount"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignBottom="#+id/sharedCardImage"
android:text="TextView"
android:textSize="#dimen/text_size_small"
android:textColor="#color/primary"
android:textAlignment="center"
android:gravity="center" />
</LinearLayout>
HorizontalListAdapter:
public class HorizontalListAdapter extends BaseAdapter
{
private Context mContext;
private ArrayList<Groups> mGroupListList;
private int mGroupPosition;
public HorizontalListAdapter(Context context, ArrayList<Groups> mGroupListList, int mGroupPosition)
{
this.mContext = context;
this.mGroupListList = mGroupListList;
this.mGroupPosition = mGroupPosition;
}
#Override
public int getCount()
{
return mGroupListList.get(mGroupPosition).getChildList().size();
}
#Override
public Object getItem(int position)
{
return mGroupListList.get(mGroupPosition).getChildList().get(position);
}
#Override
public long getItemId(int position)
{
return position;
}
#Override
public View getView(final int position, View convertView, ViewGroup parent)
{
ViewHolder viewHolder;
if (convertView == null)
{
LayoutInflater inflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.item_group_child, null, false);
viewHolder = new ViewHolder();
convertView.setTag(viewHolder);
}
else
{
viewHolder = (ViewHolder) convertView.getTag();
}
// Implement Your code here what functionality you need.
return convertView;
}
private static class ViewHolder
{
TextView txtName;
}
}
Hope it helps you. If you have any issues let me know
With the help of #Sam idea, done the Horizontal scroll for child elements of ExpandableListView with RecyclerView without any third party plugin.
Demo app: https://github.com/sivailango/ExpandableListView-RecylerChildItems
I'm getting a warning like Unconditional layout inflation which is causing the layout to exit and app goes crashing.I need to inflate this layout without crashing.
the crashing is on the following code.
I have the code for the custom adapter set.
public class CustomAdapter extends BaseAdapter {
private List<Response.NodesEntity> mMovieitem;
private Context mContext;
private LayoutInflater inflater;
public CustomAdapter(Context mContext, List<Response.NodesEntity> mMovieitem) {
this.mContext = mContext;
this.mMovieitem = mMovieitem;
}
#Override
public int getCount() {
return mMovieitem.size();
}
#Override
public Object getItem(int position) {
return mMovieitem.get(position);
}
#Override
public long getItemId(int position) {
return 0;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
LayoutInflater inflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View rowView = inflater.inflate(R.layout.s, parent, false);
Response.NodesEntity item = (Response.NodesEntity) getItem(position);
ImageView thumbnail = (ImageView) rowView.findViewById(R.id.thumbnail);
TextView title = (TextView) rowView.findViewById(R.id.title);
TextView rating = (TextView) rowView.findViewById(R.id.video_url);
String imageUrl = item.getVideoTumbnail().getSrc();
Picasso.with(mContext).load(imageUrl).into(thumbnail);
title.setText(item.getTitle());
rating.setText(item.getHlsVideo());
return rowView;
}
}
The Xml is in this format . I'm inflating this layout and
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:id="#+id/video_list"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context="info.androidhive.materialdesign.activity.FriendsFragment">
<android.support.v7.widget.CardView
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/card_view"
android:layout_width="match_parent"
android:layout_height="250dp"
android:layout_margin="5dp">
<ImageView
android:id="#+id/thumbnail"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#color/background_material_light"
android:scaleType="centerCrop" />
<TextView
android:layout_marginBottom="10dp"
android:layout_gravity="bottom"
android:id="#+id/title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toRightOf="#+id/thumbnail"
android:layout_toEndOf="#+id/thumbnail"
android:layout_marginStart="10dp"
android:layout_marginEnd="10dp"
android:typeface="sans"
android:textSize="22sp"
android:textColor="#ffffff" />
<TextView
android:layout_marginTop="20dp"
android:id="#+id/video_url"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="#id/title"
android:layout_toEndOf="#+id/thumbnail"
android:layout_toRightOf="#+id/thumbnail"
android:visibility="invisible"/>
</android.support.v7.widget.CardView>
</RelativeLayout>
use View holder method for inflating each rows
Good day to all.
I am currently working on a customized ListView which is not inflating (is not becoming visible) inside the activity.
Below are the xml and ListView adapter classes.
main.xml
<LinearLayout
android:id="#+id/llListView"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:paddingLeft="5dp"
android:paddingRight="5dp"
android:paddingTop="2dp"
android:paddingBottom="2dp"
android:layout_below="#+id/rlFirstRow">
<ListView
android:id="#+id/lvErrorsReport"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="#drawable/border"/>
</LinearLayout>
listview_row.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:id="#+id/llError"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:layout_alignParentTop="true">
<TextView
android:id="#+id/txtErrorInfo"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text=""
android:textStyle="bold"
android:textSize="20dp"/>
</LinearLayout>
<LinearLayout
android:id="#+id/llStatus"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:layout_below="#+id/llError">
<TextView
android:id="#+id/txtStatus"
android:layout_width="100dp"
android:layout_height="wrap_content"
android:text="Status: "/>
<TextView
android:id="#+id/txtStatusInfo"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text=""
android:textStyle="italic"/>
</LinearLayout>
<LinearLayout
android:id="#+id/llMaterials"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:layout_below="#+id/llStatus">
<TextView
android:id="#+id/txtMaterials"
android:layout_width="100dp"
android:layout_height="wrap_content"
android:text="Materials: "/>
<TextView
android:id="#+id/txtMaterialsInfo"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text=""
android:textStyle="italic"/>
</LinearLayout>
<LinearLayout
android:id="#+id/llButton"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:layout_below="#+id/llMaterials">
<Button
android:id="#+id/btnShowMaterials"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Show Materials"
android:visibility="gone"/>
</LinearLayout>
</RelativeLayout>
BaseAdapter class
public class RepairReportListViewAdapter extends BaseAdapter
{
ArrayList<String> errors;
ArrayList<String> statuses;
ArrayList<Boolean> materials;
Context mContext;
LayoutInflater inflater;
public RepairReportListViewAdapter(Context context, ArrayList<String> err, ArrayList<String> stat, ArrayList<Boolean> mat)
{
this.mContext = context;
this.errors = err;
this.statuses = stat;
this.materials = mat;
inflater = (LayoutInflater)mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
#Override
public int getCount()
{
return 0;
}
#Override
public Object getItem(int position)
{
return null;
}
#Override
public long getItemId(int position)
{
return 0;
}
#Override
public View getView(int position, View convertView, ViewGroup parent)
{
ViewHolder holder;
if(convertView == null)
{
holder = new ViewHolder();
convertView = inflater.inflate(R.layout.repairreport_listview, null);
holder.error = (TextView)convertView.findViewById(R.id.txtErrorInfo);
holder.status = (TextView)convertView.findViewById(R.id.txtStatusInfo);
holder.material = (TextView)convertView.findViewById(R.id.txtMaterialsInfo);
holder.showMaterials = (Button)convertView.findViewById(R.id.btnShowMaterials);
convertView.setTag(holder);
}
else
{
holder = (ViewHolder)convertView.getTag();
}
holder.error.setText(this.errors.get(position).toString());
holder.status.setText(this.statuses.get(position).toString());
if(this.materials.get(position) == true)
{
holder.material.setText("Materials where used to fix this error. Click on the button below to view the materials.");
holder.showMaterials.setVisibility(Button.VISIBLE);
holder.showMaterials.setOnClickListener(new View.OnClickListener()
{
#Override
public void onClick(View v)
{
//LATER
}
});
}
else
{
holder.material.setText("No materials where used to fix this error.");
}
return convertView;
}
static class ViewHolder
{
TextView error;
TextView status;
TextView material;
Button showMaterials;
}
}
I've already tried changing the layouts as suggested here but the ListView is still not revealed.
Any ideas why it is not showing? Sorry for the code dump but I really cannot figure out what the heck is going on.
P.S. I did set the adapter to the ListView in the main activity.
adapter = new RepairReportListViewAdapter(this, errorNames, statuses, materialsInUse);
lvErrors.setAdapter(adapter);
your ListView does not inflate nothing because getCount is returning 0
change
#Override
public int getCount()
{
return 0;
}
with
#Override
public int getCount()
{
return (stat == null) ? 0 : stat.size();
}
Also, instead of keeping three differents ArrayList, you can create a class that holds all the info you need and an ArrayList of this class