Custom ListAdapter Never Calling GetView

Custom ListAdapter Never Calling GetView - android

I've been trying to figure out what is going on with this for a little while, maybe I have been staring at it too long... I feel like it's something simple.
Here is my ListActivity class
public class ResultsListActivity extends ListActivity {
private ArrayList<Result> results = new ArrayList<Result>();
private ListView list;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.sp_history);
//set up list
list = new ListView(this);
}
#Override
protected void onResume()
{
super.onResume();
results = openAndQueryDatabase();
displayResultList();
}
private void displayResultList() {
list.setAdapter(new HistoryArrayAdapter(this.getBaseContext(), results));
}
private ArrayList<Result> openAndQueryDatabase() {
DatabaseHandler dbh = new DatabaseHandler(getBaseContext());
ArrayList<Result> toReturn = dbh.getAllResults();
return toReturn;
}//open and query database
public int getCount() {
return null == results ? 0 : results.size();
}
}
Here is my ListAdapterClass
public class HistoryArrayAdapter extends ArrayAdapter<Result> {
private final Context context;
private final ArrayList<Result> values;
private int layoutId;
public HistoryArrayAdapter(Context context, ArrayList<Result> results) {
super(context, R.layout.history_row, results);
this.context = context;
this.layoutId = R.layout.history_row;
this.values = results;
}
#Override
public int getCount() {
return values.size();// more than zero
}
#Override
public Result getItem(int position) {
return values.get(position);// may be in your case
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
if(convertView==null)
{
// inflate the layout
LayoutInflater inflater = ((Activity) context).getLayoutInflater();
convertView = inflater.inflate(layoutId, parent, false);
}// if convertView == null
//set up our views
TextView uploadSpeed = (TextView) convertView.findViewById(R.id.upload_speed_history);
TextView downloadSpeed = (TextView) convertView.findViewById(R.id.download_speed_history);
TextView pingTime = (TextView) convertView.findViewById(R.id.ping_history_text);
TextView networkName = (TextView) convertView.findViewById(R.id.history_network_name);
TextView dateTime = (TextView) convertView.findViewById(R.id.history_dateTime);
ImageView imageView = (ImageView) convertView.findViewById(R.id.history_connection);
//set up our values
Result row = values.get(position);
uploadSpeed.setText(row.getUpload());
downloadSpeed.setText(row.getDownload());
pingTime.setText(row.getPingTime());
networkName.setText(row.getNetworkName());
dateTime.setText(row.getDateTime());
if(row.getNetworkType() == "NETWORK_WIFI")
imageView.setImageResource(R.drawable.ico_wifi);
else
imageView.setImageResource(R.drawable.ico_cell);
return convertView;
}//getView
}
Here is the .xml for the ListView
<?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">
<ListView
android:id="#android:id/list"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:divider="#b5b5b5"
android:dividerHeight="1dp" />
</LinearLayout>
And Here is the Row Layout
<?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="wrap_content"
android:orientation="vertical" >
<RelativeLayout
android:id="#+id/realtive_line_1"
android:layout_width="fill_parent"
android:layout_height="wrap_content" >
<TextView
android:id="#+id/history_network_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_marginLeft="26dp"
android:layout_toRightOf="#+id/imageView1"
android:text="TextView" />
<ImageView
android:id="#+id/history_connection"
android:layout_width="20dip"
android:layout_height="20dip"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_marginLeft = "20dip"
android:layout_marginTop = "5dip"
android:src="#drawable/ico_wifi" />
<TextView
android:id="#+id/history_dateTime"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="65dp"
android:layout_below="#+id/network_name"
android:text="2013-08-15 12:35:00 PM"
android:textSize="10sp" />
</RelativeLayout>
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_below="#+id/realtive_line_1"
>
<ImageView
android:id="#+id/imageView2"
android:layout_width="15dip"
android:layout_height="15dip"
android:layout_alignParentLeft="true"
android:layout_centerVertical="true"
android:layout_marginLeft="23dp"
android:layout_marginTop = "15dip"
android:src="#drawable/ico_ping" />
<TextView
android:id="#+id/ping_history_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_marginLeft="25dp"
android:layout_toRightOf="#+id/imageView2"
android:text="30 ms"
android:textSize = "15sp"
android:textAppearance="?android:attr/textAppearanceMedium" />
<ImageView
android:id="#+id/results_icon_up"
android:layout_width="20dip"
android:layout_height="20dip"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:src="#drawable/ico_up"
android:layout_marginRight = "40dip" />
<ImageView
android:id="#+id/results_icon_down"
android:layout_width="20dip"
android:layout_height="20dip"
android:layout_alignParentRight="true"
android:layout_marginTop="5dip"
android:layout_below ="#+id/results_icon_up"
android:src="#drawable/ico_down"
android:layout_marginRight = "40dip" />
<TextView
android:id="#+id/upload_speed_history"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="#+id/results_icon_down"
android:layout_marginRight="15dp"
android:layout_toLeftOf="#+id/results_icon_up"
android:text="4.26 Mbps"
android:textAppearance="?android:attr/textAppearanceSmall" />
<TextView
android:id="#+id/download_speed_history"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignRight="#+id/upload_speed_history"
android:layout_alignTop="#+id/results_icon_down"
android:text="24.56 Mbps"
android:textAppearance="?android:attr/textAppearanceSmall" />
</RelativeLayout>
<ImageView
android:id="#+id/imageView3"
android:layout_width="20dip"
android:layout_height="20dip"
android:layout_alignParentRight ="true"
android:layout_centerVertical="true"
android:src="#drawable/arrow" />
</RelativeLayout>
Things that I do know... I do have results. I can see it in the debugger and they are populated fine. I know I have a few things that look like unnecessary methods, there is work to be done there to make sure the app isn't in the middle of a process before it populates the list.

Change your onCreate() like below,
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.sp_history);
//set up list
list = getListView();
}

AS you've stated that you are using Asynchronous call to get the Database results... even though while debugging you are getting the results, chances are that while actually running, the results might be getting after the adapter has been set in the following line hence the length of results in adapter is 0, so your getView() isn't getting a callback.
Either can have a Custom Listener that will get a call back when the results have been fetched and then you can set the adapter to the listview OR another solution might be to hold the instance of your adapter and then add the acquired results to the adapter using the Adapter.add() method and then call Adapter.notifyDataSetChanged() method.
Edit:- Also as you are using ListActivity, there's no need to create a new ListView instance. Just call getListView() method to obtain the ListView instance as the above answerer suggested.

Related

Row in listview not preserve the makeover and appears repeated

I have a list that when you click on the row on the right side the layout with the icon is changed by other. This makes it well but when I scrolling in the list, I notice there are rows with the same icon without do click. Also, if I scroll quickly these same icons are lost and are built differently. I think it's on the reuse of cells but I can not find the solution. What I want is that the image stays active only in the row where clicka.
Thanks!!
Adapter class:
public class ListadoVotantesArrayAdapter extends ArrayAdapter<Votante> {
private Context context;
private LayoutInflater inflater;
private ArrayList<Votante> listaVotantes;
private int rowLayout;
private View mConverView;
public ListadoVotantesArrayAdapter(Context context, int resource, ArrayList<Votante> objects) {
super(context, resource,objects);
this.context = context;
this.inflater = LayoutInflater.from(context);
this.listaVotantes = objects;
this.rowLayout = resource;
}
public int getCount(){
return this.listaVotantes.size();
}
public Votante getVotante(int position){
return this.listaVotantes.get(position);
}
private static class ViewHolder {
public TextView lblName;
public TextView lblLastName;
public TextView lblDni;
public TextView lblVoterNumber;
public RelativeLayout lytVoted;
public RelativeLayout lytCanVote;
public RelativeLayout lytUndo;
}
public View getView(int position, View converView, ViewGroup parent) {
final ViewHolder viewHolder;
mConverView = converView;
if (mConverView == null){
viewHolder = new ViewHolder();
this.mConverView = inflater.inflate(this.rowLayout, parent, false);
if (mConverView != null){
viewHolder.lblName = (TextView) mConverView.findViewById(R.id.lblVoterName);
viewHolder.lblLastName = (TextView) mConverView.findViewById(R.id.lblVoterLastName);
viewHolder.lblDni = (TextView) mConverView.findViewById(R.id.lblDni);
viewHolder.lblVoterNumber = (TextView) mConverView.findViewById(R.id.lblNumber);
viewHolder.lytVoted = (RelativeLayout) mConverView.findViewById(R.id.lytVoted);
viewHolder.lytCanVote = (RelativeLayout) mConverView.findViewById(R.id.lytCanVote);
viewHolder.lytUndo = (RelativeLayout) mConverView.findViewById(R.id.lytUndo);
mConverView.setTag(viewHolder);
}
}else{
viewHolder = (ViewHolder) mConverView.getTag();
}
Votante votante = getVotante(position);
viewHolder.lblName.setText(votante.getNombre());
viewHolder.lblLastName.setText(votante.getApellidos());
viewHolder.lblDni.setText(votante.getDni());
viewHolder.lblVoterNumber.setText(""+votante.getNumVotante());
if (votante.getVotado()){
viewHolder.lytVoted.setVisibility(View.VISIBLE);
viewHolder.lytCanVote.setVisibility(View.GONE);
}else{
viewHolder.lytVoted.setVisibility(View.GONE);
viewHolder.lytCanVote.setVisibility(View.VISIBLE);
}
mConverView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
viewHolder.lytUndo.setVisibility(View.VISIBLE);
notifyDataSetChanged();
}
});
return mConverView;
}
}
Layout Row:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/lyt_voter"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="1dp">
<RelativeLayout
android:id="#+id/lytVoterNumber"
android:layout_width="70dp"
android:layout_height="70dp"
android:layout_alignParentLeft="true"
android:background="#color/lightBlueItemList">
<TextView
android:id="#+id/lblNumber"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:text="1999"
android:textAppearance="?android:attr/textAppearanceMedium" />
</RelativeLayout>
<LinearLayout
android:id="#+id/lytVoterData"
android:layout_width="wrap_content"
android:layout_height="70dp"
android:layout_alignParentTop="true"
android:layout_toLeftOf="#+id/lytCanVote"
android:layout_toRightOf="#+id/lytVoterNumber"
android:layout_toStartOf="#+id/lytCanVote"
android:background="#color/whiteItemList"
android:orientation="vertical"
android:padding="5dp">
<TextView
android:id="#+id/lblVoterLastName"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Suarez Garcia de la Serna"
android:textAppearance="?android:attr/textAppearanceMedium" />
<TextView
android:id="#+id/lblVoterName"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="José Carlos"
android:textAppearance="?android:attr/textAppearanceMedium" />
<TextView
android:id="#+id/lblDni"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="44950962S"
android:textAppearance="?android:attr/textAppearanceMedium" />
</LinearLayout>
<RelativeLayout
android:id="#+id/lytCanVote"
android:layout_width="70dp"
android:layout_height="70dp"
android:layout_alignParentRight="true"
android:background="#color/yellowItemList"
android:minHeight="30dp"
android:minWidth="30dp">
<ImageView
android:id="#+id/imgVote"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:src="#drawable/flecha" />
</RelativeLayout>
<RelativeLayout
android:id="#+id/lytVoted"
android:layout_width="70dp"
android:layout_height="70dp"
android:layout_alignParentRight="true"
android:background="#color/grrenAcceptList"
android:minHeight="30dp"
android:minWidth="30dp"
android:visibility="gone">
<ImageView
android:id="#+id/imgAccept"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:src="#drawable/aceptar"
/>
</RelativeLayout>
<RelativeLayout
android:layout_width="70dp"
android:layout_height="70dp"
android:minHeight="30dp"
android:minWidth="30dp"
android:background="#color/redD3"
android:id="#+id/lytUndo"
android:layout_alignParentRight="true"
android:visibility="gone">
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/imgUndo"
android:layout_centerVertical="true"
android:layout_centerHorizontal="true"
android:src="#drawable/undo"/>
</RelativeLayout>
</RelativeLayout>

You need to follow below Idea
1) this line of code mConverView = converView; doesn't makes sense. directly use converView(View from getView param). Remove mConvertView from the adapter.
2) Add some mechanism which can tell you which row is clicked and save that variable.
Example:- Have an boolean Array of size Rows.size . and set them in onClick.
Boolean[] array = new Boolean[getSize()];
in onClick that you already have in your getview set this.
public void onClick(View v) {
array[position] = !array[position];
viewHolder.lytUndo.setVisibility(View.VISIBLE);
//You do not need to call notifyDatasetChange.
3) in getView(), when you are setting data in to row items/or just before onClick. have a check like below.
if(array[position])// this will tell you if you need to show or hid lytUndo thing
viewHolder.lytUndo.setVisibility(View.VISIBLE); // Show it
else
viewHolder.lytUndo.setVisibility(View.GONE); // hide it or do whatever you want
You might need to set some params as final
I have written this as simple as possible, comment back with your result.

How can I create a dynamic ListView in Android that contains images in between a fixed header and footer?

I'm a beginner to Android development, but not to software development. I've been looking for tutorials on how to create dynamic ListViews with images and have had some trouble.
The tutorial I followed most closely was #2 on this link (the Custom ArrayAdapter example): http://www.mkyong.com/android/android-listview-example/
This works fine if I remove the header and footer from my layout xml file, but I really need those to be included. Below I'll post my source from my Activity java file, my custom array adapter java file, and my layout xml file as well as the output. I think there may be something I'm missing or not understanding about how the layout inflater works.
Thanks for your time.
MainActivity.java
public class MainActivity extends ListActivity {
static final String[] MAIN_MENU =
new String[] { "ICD-10", "EDUCATION", "NEWS", "SERVICES", "CONTACT" };
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setListAdapter(new ImageAdapter(this, MAIN_MENU));
}
#Override
protected void onListItemClick(ListView l, View v, int position, long id) {
//get selected items
String selectedValue = (String) getListAdapter().getItem(position);
// to contact
if(selectedValue.equals(MAIN_MENU[4])) {
contactPressed(v);
}
// to icd-10
else if(selectedValue.equals(MAIN_MENU[0])) {
startActivity(new Intent(MainActivity.this, ICDActivity.class));
}
// to services
else if(selectedValue.equals(MAIN_MENU[3])) {
startActivity(new Intent(MainActivity.this, ServicesActivity.class));
}
}
public void contactPressed(View v) {
startActivity(new Intent(MainActivity.this, ContactActivity.class));
overridePendingTransition(R.anim.slide_in_up, R.anim.stay);
}
}
ImageAdapter.java
public class ImageAdapter extends ArrayAdapter<String>
{
private final Context context;
private final String[] values;
public ImageAdapter(Context context, String[] values) {
super(context, R.layout.activity_main, values);
this.context = context;
this.values = values;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
LayoutInflater inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View rowView = inflater.inflate(R.layout.activity_main, parent, false);
TextView textView = (TextView) rowView.findViewById(R.id.lvText);
ImageView imageView = (ImageView) rowView.findViewById(R.id.lvImage);
textView.setText(values[position]);
// Change icon based on name
String s = values[position];
if (s.equals("ICD-10"))
{
imageView.setImageResource(R.drawable.icon_icd10);
}
else if(s.equals("EDUCATION"))
{
imageView.setImageResource(R.drawable.icon_education);
}
else if(s.equals("NEWS"))
{
imageView.setImageResource(R.drawable.icon_news);
}
else if(s.equals("SERVICES"))
{
imageView.setImageResource(R.drawable.icon_services);
}
else if(s.equals("CONTACT"))
{
imageView.setImageResource(R.drawable.icon_contact);
}
return rowView;
}
}
activity_main.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<ImageView
android:id="#+id/custom_background"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:scaleType="fitXY"
android:src="#drawable/gray">
</ImageView>
<RelativeLayout
android:id="#+id/headerLayout"
android:layout_width="match_parent"
android:layout_height="45dp"
android:layout_alignParentTop="true" >
<ImageView
android:id="#+id/header"
android:layout_width="wrap_content"
android:layout_height="45dp"
android:scaleType="fitXY"
android:src="#drawable/logo_header" />
</RelativeLayout>
<!-- Footer aligned to bottom -->
<RelativeLayout
android:id="#+id/footerLayout"
android:layout_alignParentBottom="true"
android:layout_width="match_parent"
android:layout_height="30dp" >
<ImageView
android:id="#+id/footer"
android:layout_alignParentBottom="true"
android:layout_width="match_parent"
android:layout_height="30dp"
android:scaleType="center"
android:src="#drawable/footer" />
<TextView
android:id="#+id/footerText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:layout_marginLeft="14dp"
android:onClick="contactPressed"
android:layout_marginBottom="5dp"
android:text="#string/footerText" />
</RelativeLayout>
<ScrollView
android:id="#+id/scrollableContents"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_above="#id/footerLayout"
android:layout_below="#id/headerLayout" >
<LinearLayout
android:id="#+id/linearList"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_above="#id/footerLayout"
android:layout_below="#id/headerLayout"
android:padding="5dp"
tools:context=".MainActivity" >
<!-- Making a dynamic ListView with images with the two attributes below -->
<ImageView
android:id="#+id/lvImage"
android:layout_width="40dp"
android:layout_height="40dp"
android:layout_alignParentRight="true"
android:layout_marginLeft="20dp"
android:layout_marginRight="5dp"
android:layout_marginTop="5dp"
android:src="#drawable/icon_icd10" >
</ImageView>
<TextView
android:id="#+id/lvText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#+id/lvText"
android:textSize="25sp" >
</TextView>
</LinearLayout>
</ScrollView>
</RelativeLayout>
The output I get for this is:
If I comment out the header and footer code in the xml I get:
The goal is for it to look similar to this but with images on the right side of each line:
Thanks for your time.

First looks like you have
android:layout_above="#id/footerLayout"
android:layout_below="#id/headerLayout"
on your #+id/scrollableContents, which is good. But you also have it on the view nested inside it, #+id/linearList which is not right. There may be other layout problems but it is hard to tell. In general this layout looks very complex for what you are trying to achieve.
But I'm not sure really what you mean by "dynamic ListView" and it looks like you are trying to re-create the functionality of a listview using a ScrollView. I don't think you should take that approach. The ListView is very flexible and you can use a custom layout for your items.

So I found the solution to my problem while searching for another tutorial. I finally ended up using this tutorial: http://www.learn2crack.com/2013/10/android-custom-listview-images-text-example.html
My problem was that I tried to replace my ListView with a TextView and ImageView in the same layout.xml file when I should have created my TextView and ImageView in a different layout.xml file. Below is the final code and the correct output I was looking for. Thanks!
list_single.xml (below)
<?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" >
<ImageView
android:id="#+id/img"
android:layout_width="50dp"
android:layout_height="50dp"
android:layout_marginRight="5dp"
android:layout_marginTop="9dp"
android:layout_alignParentRight="true" />
<TextView
android:id="#+id/txt"
android:layout_width="wrap_content"
android:layout_height="50dp"
android:layout_marginTop="17dp"
android:layout_marginLeft="5dp"
android:textSize="23sp" />
</RelativeLayout>
activity_main.xml (below)
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<ImageView
android:id="#+id/custom_background"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:scaleType="fitXY"
android:src="#drawable/gray">
</ImageView>
<ImageView
android:id="#+id/header"
android:layout_width="wrap_content"
android:layout_height="45dp"
android:scaleType="fitXY"
android:src="#drawable/logo_header" />
<!-- Footer aligned to bottom -->
<ImageView
android:id="#+id/footer"
android:layout_width="match_parent"
android:layout_height="30dp"
android:layout_alignParentBottom="true"
android:scaleType="center"
android:src="#drawable/footer" />
<TextView
android:id="#+id/footerText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:layout_marginBottom="5dp"
android:layout_marginLeft="14dp"
android:onClick="contactPressed"
android:text="#string/footerText" />
<ListView
android:id="#+id/mainMenuList"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="#id/footer"
android:layout_below="#id/header"
android:divider="#000000"
android:dividerHeight="0.1dp" />
</RelativeLayout>
ImageAdapter.java (below)
public class ImageAdapter extends ArrayAdapter<String>
{
private final Context context;
private final String[] values;
public ImageAdapter(Context context, String[] values) {
super(context, R.layout.list_single, values);
this.context = context;
this.values = values;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
LayoutInflater inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View rowView = inflater.inflate(R.layout.list_single, null, true);
TextView textView = (TextView) rowView.findViewById(R.id.txt);
ImageView imageView = (ImageView) rowView.findViewById(R.id.img);
textView.setText(values[position]);
// Change icon based on name
String s = values[position];
if (s.equals("ICD-10"))
{
imageView.setImageResource(R.drawable.icon_icd10);
}
else if(s.equals("EDUCATION"))
{
imageView.setImageResource(R.drawable.icon_education);
}
else if(s.equals("NEWS"))
{
imageView.setImageResource(R.drawable.icon_news);
}
else if(s.equals("SERVICES"))
{
imageView.setImageResource(R.drawable.icon_services);
}
else if(s.equals("CONTACT"))
{
imageView.setImageResource(R.drawable.icon_contact);
}
return rowView;
}
}
MainActivity.java (below)
public class MainActivity extends Activity {
ListView list;
static final String[] MAIN_MENU =
new String[] { "ICD-10", "EDUCATION", "NEWS", "SERVICES", "CONTACT" };
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
list = (ListView)findViewById(R.id.mainMenuList);
list.setAdapter(new ImageAdapter(MainActivity.this, MAIN_MENU));
// register onClickListener to handle click events on each item
list.setOnItemClickListener(new OnItemClickListener() {
// argument position gives the index of item which is clicked
public void onItemClick(AdapterView<?> arg0, View v, int position,
long arg3) {
String selectedValue = MAIN_MENU[position];
// to contact
if(selectedValue.equals(MAIN_MENU[4])) {
contactPressed(v);
}
// to icd-10
else if(selectedValue.equals(MAIN_MENU[0])) {
startActivity(new Intent(MainActivity.this, ICDActivity.class));
}
// to services
else if(selectedValue.equals(MAIN_MENU[3])) {
startActivity(new Intent(MainActivity.this, ServicesActivity.class));
}
}
});
}
public void contactPressed(View v) {
startActivity(new Intent(MainActivity.this, ContactActivity.class));
overridePendingTransition(R.anim.slide_in_up, R.anim.stay);
}
}
And the final output (below)

How to create a listView with multiple views in a row.

I am writing an app that requires the user to enter some details into a form. The form initially has 3 EditText views in a row. When the user enters some data in the last editText, the onFocusChangeListener should initiate a new row.
This is what I want to do.
How can I create 3 editText views in a single listView row at runtime?

To create a listView with multiple views in a row, you need to customize your adapter, so it can take the form of your row from a source XML -that you should create- and puts it into your listView, here is an example based on BaseAdapter:
This is your Xml source that contains the form of your Row:
espaceclientuploadsource.xml :
<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:addStatesFromChildren="true" >
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:addStatesFromChildren="true" >
<ImageView
android:id="#+id/Uplodimage"
android:layout_width="100dp"
android:layout_height="100dp"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_marginLeft="15dp"
android:src="#drawable/bingo" />
<TextView
android:id="#+id/UploadedProductName"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_marginLeft="20dp"
android:layout_marginTop="24dp"
android:layout_toRightOf="#+id/Uplodimage"
android:text="Medium Text"
android:textAppearance="?android:attr/textAppearanceMedium" />
<TextView
android:id="#+id/UplodedProductPrice"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="#+id/UploadedProductName"
android:layout_below="#+id/UploadedProductName"
android:layout_marginTop="16dp"
android:text="Small Text"
android:textAppearance="?android:attr/textAppearanceSmall" />
<ImageView
android:id="#+id/UploadedStatus"
android:layout_width="15dp"
android:layout_height="15dp"
android:layout_above="#+id/UplodedProductPrice"
android:layout_alignParentRight="true"
android:layout_alignTop="#+id/UploadedProductName"
android:layout_marginRight="27dp"
android:src="#drawable/bingo" />
<ImageView
android:id="#+id/ImageViewDelete"
android:layout_width="15dp"
android:layout_height="15dp"
android:layout_alignBottom="#+id/UplodedProductPrice"
android:layout_alignLeft="#+id/UploadedStatus"
android:clickable="true"
android:src="#drawable/bingo" />
</RelativeLayout>
Then you need to create an XML file that containes your ListView:
espaceclientuploads:
<EditText
android:id="#+id/login"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ems="10" >
<requestFocus />
</EditText>
<EditText
android:id="#+id/password"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ems="10"
android:inputType="textPassword" />
<Button
android:id="#+id/submit"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="submit"
android:text="Button" />
</LinearLayout>
Next is your adapter, it's role is to use your sourceXML as your row Format,
UploadedAdapter :
public class UploadedAdapter extends BaseAdapter
{
List<Article> lesArticles;
DataSource produitSource;
LayoutInflater inflater;
String path= Environment.getExternalStorageDirectory().toString()+File.separator+"Bingo";
public UploadedAdapter(Context context, List<Article> lesArticles)
{
inflater=LayoutInflater.from(context);
this.lesArticles = lesArticles;
}
#Override
public int getCount()
{
return lesArticles.size();
}
#Override
public Object getItem(int position)
{
return lesArticles.get(position);
}
#Override
public long getItemId(int position)
{
return position;
}
private class ViewHolder
{
TextView nomduProduit;
TextView prixDuProduit;
ImageView status;
ImageView imageDuProduit;
ImageView delete;
}
#Override
public View getView(final int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if (convertView==null)
{
holder=new ViewHolder();
convertView = inflater.inflate(R.layout.espaceclientuploadsource, null);
holder.nomduProduit = (TextView)convertView.findViewById(R.id.UploadedProductName);
holder.prixDuProduit = (TextView)convertView.findViewById(R.id.UplodedProductPrice);
holder.imageDuProduit = (ImageView)convertView.findViewById(R.id.Uplodimage);
holder.status = (ImageView)convertView.findViewById(R.id.UploadedStatus);
holder.delete=(ImageView)convertView.findViewById(R.id.ImageViewDelete);
convertView.setTag(holder);
}
else
{
holder = (ViewHolder) convertView.getTag();
}
Drawable drawableImage = new BitmapDrawable(bitmapImage);
holder.imageDuProduit.setImageDrawable(drawableImage);
holder.nomduProduit.setText(lesArticles.get(position).getNomArticle());
holder.prixDuProduit.setText(lesArticles.get(position).getPrix());
holder.delete.setImageResource(R.drawable.delete);
return convertView;
}
}
As you can see, your adapter extends the baseAdapter which is an abstract class, so you need to Override its method.
Finally it's your activity that will display your listView:
public class EspaceClientUplodedProducts extends Activity{
List<Article> lesArticle= new ArrayList<Article>();
ListView lvListe;
UploadedAdapter adapter;
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.espaceclientuploads);
lvListe= (ListView)findViewById(R.id.UploadListView);
adapter = new UploadedAdapter(this, lesArticle);
lvListe.setAdapter(adapter);
lvListe.setOnItemClickListener(this);
}
}

Populating ScrollView with TextViews, Android Eclipse

Here is a segment from my .xml layout file:
<ScrollView
android:layout_width = "match_parent"
android:layout_height = "300dp" >
<TextView
android:id="#+id/statementdatetv"
android:layout_width="61dp"
android:layout_height="300dp"
android:text="DATE"
android:textSize="10dp" />
<TextView
android:id="#+id/statementlocationtv"
android:layout_width="95dp"
android:layout_height="300dp"
android:text="LOCATION" android:textSize="10dp"/>
<TextView
android:id="#+id/statementshoptypetv"
android:layout_width="95dp"
android:layout_height="300dp"
android:text="SHOPTYPE" android:textSize="10dp"/>
<TextView
android:id="#+id/statementpricetv"
android:layout_width="fill_parent"
android:layout_height="300dp"
android:text="PRICE" android:layout_weight="1" android:textSize="10dp"/>
</ScrollView>
</LinearLayout>
The TextViews inside the ScrollView are to be populated from an SQL database. Everything worked fine before the ScrollView was added in, but afterwards it just came up with an error?
Unfortunately I don't know which error, is it just not possible to populate the values from an SQL database into a TextView which is inside a ScrollView?
The reason why I want to have a ScrollView is because a lot of Data could be outputted, and I want it to all be on the same page, therefore a ScrollView was the perfect (or so I thought) solution!
Thanks!

Try this, by using ListView
MyAdapter adapteres;
list = (ListView) findViewById(R.id.grp_list);
db = new DatabaseHelper(this);
contacts = db.getAllContacts();
adapteres = new MyAdapter(getBaseContext(), (ArrayList<Contact>) contacts);
list.setAdapter(adapteres);
and Here MyAdapter class:
public class MyAdapter extends BaseAdapter{
Button btn;
#SuppressWarnings("unused")
private Context context;
private ArrayList<Contact> contact;
private LayoutInflater mInflater;
public MyAdapter(Context context, ArrayList<Contact> contacts) {
this.context = context;
this.contact = contacts;
mInflater = LayoutInflater.from(context);
}
public int getCount() {
return contact.size();
}
public Object getItem(int position) {
return contact.get(position);
}
public long getItemId(int position) {
return position;
}
public View getView(int pos, View view, ViewGroup parent) {
if (view == null) {
view = mInflater.inflate(R.layout.group_row, parent, false);
}
Contact item = contact.get(pos);
TextView name = (TextView) view.findViewById(R.id.group_name);
name.setText(item.getName());
}
}

If you want to show some records from DB, probably the best way is using ListViev instead of ScrollView. You should find plenty of examples for ListViev, CursorAdapter on the net.

use a LinearLayout inside scroll view.
:)
<ScrollView
android:layout_width = "match_parent"
android:layout_height = "300dp" >
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
>
<TextView
android:id="#+id/statementdatetv"
android:layout_width="61dp"
android:layout_height="300dp"
android:text="DATE"
android:textSize="10dp" />
<TextView
android:id="#+id/statementlocationtv"
android:layout_width="95dp"
android:layout_height="300dp"
android:text="LOCATION" android:textSize="10dp"/>
<TextView
android:id="#+id/statementshoptypetv"
android:layout_width="95dp"
android:layout_height="300dp"
android:text="SHOPTYPE" android:textSize="10dp"/>
<TextView
android:id="#+id/statementpricetv"
android:layout_width="fill_parent"
android:layout_height="300dp"
android:text="PRICE" android:layout_weight="1" android:textSize="10dp"/>
</LinearLayout>
</ScrollView>

Android EditText: How to process data

I have created an application which is a simple form. Users will enter username data and password into each editText pair provided.
My problem comes with extracting this data. Normally, I would extract by the "#id/" value assigned to each editText, but as I am using an adapter and a separate xml file for the row this is not possible, as each editText has the same id.
Does anyone have an idea how I might go about doing this?
Main.xml
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent" android:layout_height="fill_parent">
<Button
android:id="#+id/cancelbutton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/cancel"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:paddingLeft="50dp"
android:paddingRight="50dp"/>
<Button
android:id="#+id/submitbutton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/submit"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:paddingLeft="50dp"
android:paddingRight="50dp"/>
<ListView
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:id="#+id/list"
android:layout_alignParentTop="true"
android:layout_above="#id/cancelbutton" />
list.xml : used for individual row
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<ImageView
android:id="#+id/logo"
android:layout_width="100dp"
android:layout_height="100dp"
android:layout_alignParentTop="true"
android:layout_alignParentBottom="true"
android:src="#drawable/g" >
</ImageView>
<EditText
android:id="#+id/firstLine"
android:layout_width="200dp"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:text="email"
>
</EditText>
<EditText
android:id="#+id/secondLine"
android:layout_width="200dp"
android:layout_height="wrap_content"
android:layout_alignRight="#id/logo"
android:layout_alignParentRight="true"
android:layout_below="#id/firstLine"
android:text="password"
>
</EditText>
public class ColorAdapter extends ArrayAdapter<String> {
private final Context context;
private final String[] values;
public SocialSiteAdapter(Context context, String[] values) {
super(context, R.layout.list, values);
this.context = context;
this.values = values;
}
// GetView does what exactly..?
#Override
public View getView(int position, View convertView, ViewGroup parent) {
LayoutInflater inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View rowView = inflater.inflate(R.layout.list, parent, false);
ImageView imageView = (ImageView) rowView.findViewById(R.id.logo);
// Change icon based on name
String s = values[position];
System.out.println(s);
if (s.equals("Blue")) {
imageView.setImageResource(R.drawable.b);
} else if (s.equals("Green")) {
imageView.setImageResource(R.drawable.g);
} else if (s.equals("Red")) {
imageView.setImageResource(R.drawable.r);
} else if (s.equals("Yellow")) {
imageView.setImageResource(R.drawable.y);
} else {
imageView.setImageResource(R.drawable.ic_launcher);
}
return rowView;
}
}

You need to first select the row and then inside the row select the EditTexts by their known #id
To list the entries you could go like:
ListView listView = getListView();
for (int i = 0; i < listView.getCount(); i++) {
Layout row = (Layout) listView.getItemAtPosition(i); /// XXX
EditText t = (EditText) row.findViewById(R.id.firstLine);
// ...
}
You need to check by yourself in the line with XXX what the getItem.. call returns and change accordingly.

Develop Reference

The Android operating system is a mobile operating system that was developed by Google (GOOGL?) to be primarily used for touchscreen devices, cell phones, and tablets.

Custom ListAdapter Never Calling GetView - android

Change your onCreate() like below, #Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.sp_history); //set up list list = getListView(); }

Related

Row in listview not preserve the makeover and appears repeated

How can I create a dynamic ListView in Android that contains images in between a fixed header and footer?

How to create a listView with multiple views in a row.

Populating ScrollView with TextViews, Android Eclipse

Android EditText: How to process data

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