We Keep Coding

How to increase the number of text in Android programmatically

I have a page in which I'm taking the START TIME and END TIME from DATABASE.
Let's say the START TIME is 7:00 and END TIME is 22:00
I want to use this START TIME and END TIME to show in my page as textview like 7:00 8:00 9:00 and sooo on till 22:00 as textview
Also I have an imageview that will also increase when the text increases.
How can I achieve this?
Also I want the result text in Horizontal Scroll View with Imageview at top and text view as bottom of each imageview
char first = StartTime.charAt(0);
int StartTimeint = Integer.parseInt(String.valueOf(first));
int l;
for( l = StartTimeint; l<=22; l++){
Log.d("SeatsPage", "Time is "+l);
}
timeofseats.setText(Integer.toString(l));
This is I have done so far but I'm getting 23 as a result, the textview is not increasing
This is my XML File
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout 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="match_parent"
android:id="#+id/llMain"
android:layout_height="match_parent"
tools:context=".SeatsPagewithDB.SeatsPage">
<ImageView
android:id="#+id/imageView11"
android:layout_width="150px"
android:layout_height="150px"
android:layout_marginStart="28dp"
android:layout_marginEnd="326dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:srcCompat="#drawable/seat" />
<TextView
android:id="#+id/timeofseats"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="40dp"
android:layout_marginTop="12dp"
android:layout_marginEnd="334dp"
android:background="#FF0000"
android:paddingLeft="10dp"
android:paddingRight="10dp"
android:text="7:00"
android:textColor="#fff"
android:textSize="20dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/imageView11" />
</android.support.constraint.ConstraintLayout>
This is the result I am getting as layout
This what I want programmatically

The XML code that you write in your layout.xml file to create the UI is for static UI only. What you are asking is to create views dynamically during runtime. Although you can definitely create views using java code on a click of a button or something. But it is better to code less for the UI whenever possible and keep it separated from the program code. Instead use the tools given to us by the framework we are using.
In Android those tools include stuff like ListView, GridView and the newer and better RecyclerView. These views help you add other views dynamically to your UI in runtime. You define one of them or more (depending on your UI needs) once in your layout.xml and configure them using java code like any other view.
This is how you can use RecyclerView to achieve your goal. I can't explain everything how RecyclerView works and what each line of code does as it will make a very long post but I have tried to highlight main things briefly.
1. Add RecyclerView in your layout file.
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
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="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/recyclerView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
2. Create another layout file and define the template UI of the item that the RecyclerView is going to display. RecyclerView will populate each item that it holds with this layout.
item_view.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
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="wrap_content"
android:layout_height="wrap_content"
android:gravity="center"
android:orientation="vertical">
<ImageView
android:id="#+id/imageView_alarm"
android:layout_width="90dp"
android:layout_height="90dp"
android:src="#drawable/alarm" />
<TextView
android:id="#+id/textView_Time"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="8dp"
android:background="#FF0000"
android:paddingLeft="8dp"
android:paddingRight="8dp"
android:text="Time"
android:textColor="#android:color/background_light"
android:textSize="24sp" />
</LinearLayout>
3. Create a ViewHolder class that extends from RecyclerView.ViewHolder. View holder is a RecyclerView related concept. In short it works as a wrapper around the view of a single item and aids in binding new data to the view of the item. Create a bind() function inside view holder to make your life easier.
EDIT: I have updated the class by implementing the View.OnClickListener interface, modified the constructor to pass in the context from onCreateViewHolder() and adding a setItemPosition() just for the sake to pass the item position number from onBindViewHolder() all over to here so we can use this position number in our onClick() method of the interface
MyViewHolder.java [UPDATED]
public class MyViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
private TextView textView;
private int itemPosition;
private Context mContext;
public MyViewHolder(#NonNull View itemView, Context context) {
super(itemView);
itemView.setOnClickListener(this);
mContext = context;
textView = itemView.findViewById(R.id.textView_Time);
}
void bind(String timeText)
{
textView.setText(timeText);
}
void setItemPosition(int position)
{
itemPosition = position;
}
#Override
public void onClick(View v) {
Toast.makeText(mContext, "You clicked item number: " + itemPosition , Toast.LENGTH_SHORT).show();
}
}
4. Create an Adapter class that extends from RecyclerView.Adapter. Adapter works as a bridge between the UI data and RecyclerView itself. An Adapter tells the RecyclerView what layout file to inflate and how many to inflate. RecyclerView job is to deal with how to inflate it on the UI.
EDIT : Just changed myViewHolder in onCreateViewHolder() to match the modified constructor of MyViewHolder. Added the call to setItemPosition() in the onBindViewHolder().
MyAdapter.java [UPDATED]
public class MyAdapter extends RecyclerView.Adapter {
List<String> timeIntervalList = new ArrayList<>();
#NonNull
#Override
public RecyclerView.ViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_view, parent, false);
MyViewHolder myViewHolder = new MyViewHolder(view , parent.getContext());
return myViewHolder;
}
#Override
public void onBindViewHolder(#NonNull RecyclerView.ViewHolder holder, int position) {
MyViewHolder viewHolder = (MyViewHolder) holder;
viewHolder.setItemPosition(position);
viewHolder.bind(timeIntervalList.get(position));
}
#Override
public int getItemCount() {
return timeIntervalList.size();
}
public void addItem (String timeText)
{
timeIntervalList.add(timeText);
notifyItemInserted(getItemCount());
}
}
In this adapter you will see two functions. OnCreateViewHolder() inflates the view using the template layout file for a single item and OnBindViewHolder() binds new data to the default values of the of the view just created. The data used for binding is stored in a list inside this Adapter called the timeIntervalList. This list will hold your time interval strings so they can be updated on the view.
5. Finally, use this RecyclerView where you want to use it. Like in your MainActivity.java. RecyclerView needs to be told in what fashion to display the items (e.g list , grid etc ) using a LayoutManager. LinearLayoutManager will display items either vertically or horizontally. You can see I am using your logic to increment time from string and adding new views to RecyclerView using the addItem() function of the MyAdapter class.
MainActivity.java
public class MainActivity extends AppCompatActivity {
private RecyclerView myRecyclerView;
private MyAdapter myAdapter;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
myRecyclerView = findViewById(R.id.recyclerView);
myAdapter = new MyAdapter();
LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this , LinearLayoutManager.HORIZONTAL, false);
myRecyclerView.setLayoutManager(linearLayoutManager);
myRecyclerView.setAdapter(myAdapter);
// This is how you will populate the recycler view
String START_TIME = "7:00";
String END_TIME = "22:00";
char first = START_TIME.charAt(0);
int StartTimeint = Integer.parseInt(String.valueOf(first));
int l;
for( l = StartTimeint; l<=22; l++){
// This is where new item are added to recyclerView.
myAdapter.addItem(l + ":00");
}
}
}
This is the final result.

Change your activity layout XML code as follows,
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout 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="match_parent"
android:id="#+id/llMain"
android:layout_height="match_parent"
tools:context=".SeatsPagewithDB.SeatsPage">
<HorizontalScrollView
android:layout_width="match_parent"
android:layout_height="wrap_content"
...
...>
<LinearLayout
android:id="#+id/container"
android:orientation="horizontal"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</HorizontalScrollView>
</android.support.constraint.ConstraintLayout>
Move the textview and imageview to another XML file let's call it item_view.xml (you can name it whatever you wish). we are doing so because the root view of this file will be reused.
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="wrap_content"
android:layout_height="wrap_content">
<ImageView
android:id="#+id/imageView11"
android:layout_width="150px"
android:layout_height="150px"
app:srcCompat="#drawable/seat"/>
<TextView
android:id="#+id/timeofseats"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#FF0000"
android:paddingLeft="10dp"
android:paddingRight="10dp"
android:text="7:00"
android:textColor="#fff"
android:textSize="20dp"/>
</LinearLayout>
Now make following changes in your Java file
LinearLayout container = findViewById(R.id.container); // or rootView.findViewById() for custom View and Fragment
char first = StartTime.charAt(0);
int StartTimeint = Integer.parseInt(String.valueOf(first));
for(int l = StartTimeint; l<=22; l++){
Log.d("SeatsPage", "Time is "+l);
View view = LayoutInflater.from(container.getContext()).inflate(R.layout.item_view, null);
TextView timeofseats = view.findViewById(R.id.timeofseats);
timeofseats.setText(Integer.toString(l));
container.addView(view);
}

getView() never called on custom adapter

I am aware that other people have asked this question, but I have looked at other solutions and still can't get it to work.
Adapter code:
private class CustomTextAndImageAdapter extends ArrayAdapter<String> {
private Context context;
private Activity activity;
private ArrayList<String> timeArrayList;
private ArrayList<Bitmap> weatherIconArrayList;
private ArrayList<String> descriptionArrayList;
private ArrayList<String> tempArrayList;
private ArrayList<String> popArrayList;
private ArrayList<String> windSpeedArrayList;
public final void setTimeArrayList(ArrayList<String> timeArrayList)
{
this.timeArrayList = timeArrayList;
}
public final void setDescriptionArrayList(ArrayList<String> descriptionArrayList)
{
this.descriptionArrayList = descriptionArrayList;
}
public final void setTempArrayList(ArrayList<String> tempArrayList)
{
this.tempArrayList = tempArrayList;
}
public final void setPopArrayList(ArrayList<String> popArrayList)
{
this.popArrayList = popArrayList;
}
public final void setWindSpeedArrayList(ArrayList<String> windSpeedArrayList)
{
this.windSpeedArrayList = windSpeedArrayList;
}
public final void setWeatherIconArrayList(ArrayList<Bitmap> weatherIconArrayList)
{
this.weatherIconArrayList = weatherIconArrayList;
}
public CustomTextAndImageAdapter(Context context, Activity activity, int resource)
{
super(context, resource);
this.context = context;
this.activity = activity;
}
#Override
public View getView(int position, View view, ViewGroup parent)
{
Log.d(Constants.LOG_TAG, "getView() method called");
LayoutInflater inflater = activity.getLayoutInflater();
View rowView= inflater.inflate(R.layout.itemlistrow, null, false);
TextView timeTextView = (TextView)rowView.findViewById(R.id.time);
timeTextView.setText(timeArrayList.get(position));
Log.d(Constants.LOG_TAG, "Time text view text = " + timeArrayList.get(position));
ImageView iconImageView = (ImageView) rowView.findViewById(R.id.weatherIcon);
iconImageView.setImageBitmap(weatherIconArrayList.get(position));
TextView descriptionTextView = (TextView)rowView.findViewById(R.id.description);
descriptionTextView.setText(descriptionArrayList.get(position));
TextView tempTextView = (TextView)rowView.findViewById(R.id.temp);
tempTextView.setText(tempArrayList.get(position));
TextView popTextView = (TextView)rowView.findViewById(R.id.pop);
popTextView.setText(popArrayList.get(position));
TextView windSpeedTextView = (TextView)rowView.findViewById(R.id.windSpeed);
windSpeedTextView.setText(windSpeedArrayList.get(position));
return rowView;
}
}
List item layout (itemlistrow.xml):
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent"
android:weightSum="1">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/time" />
<LinearLayout
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<LinearLayout
android:orientation="vertical"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1">
<ImageView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/weatherIcon"
/>
</LinearLayout>
<LinearLayout
android:orientation="vertical"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Sunny"
android:id="#+id/description"
/>
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="11 C"
android:id="#+id/temp"
/>
</LinearLayout>
<LinearLayout
android:orientation="vertical"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text = "Rain:"
/>
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text = "Wind:"
/>
</LinearLayout>
<LinearLayout
android:orientation="vertical"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id = "#+id/pop"
/>
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text = "#+id/windSpeed"
/>
</LinearLayout>
</LinearLayout>
</LinearLayout>
In some of the other solutions, it mentions overriding getCount(). Is this what I am doing wrong? If so, how would I know what to put in for getCount(), as there are multiple different ArrayLists used. Is it a case of picking one of them, as they are all the same length, e.g. timeArrayList.size()?

Using multiple ArrayList objects like that kind of defeats the purpose of using an ArrayAdapter, whose idea is to have a single source of items. Not to mention that the code right now doesn't look nice at all.
I'd suggest to first create a Weather object that will hold your data:
public class Weather {
private String time;
private Bitmap weatherIcon;
private String description;
private String temp;
private String pop;
private String windSpeed;
// build object here, provide getters, etc....
.....
}
Than your adapter can be transformed to something simpler like this:
private class CustomTextAndImageAdapter extends ArrayAdapter<Weather>
{
private LayoutInflater inflater;
public CustomTextAndImageAdapter(Context context, Activity activity, int resource, List<Weather> items)
{
super(context, resource, items);
this.inflater = LayoutInflater.from(context);
}
#Override
public View getView(int position, View view, ViewGroup parent)
{
View rowView= inflater.inflate(R.layout.itemlistrow, null, false);
TextView timeTextView = (TextView)rowView.findViewById(R.id.time);
timeTextView.setText(getItem(position).getTime());
ImageView iconImageView = (ImageView) rowView.findViewById(R.id.weatherIcon);
iconImageView.setImageBitmap(getItem(position).getWeatherIcon());
........
return rowView;
}
}
Main difference is that it's now an ArrayAdapter<Weather> and that you're passing the arguments directly in the constructor of the adapter. Users of the adapter now have to call just 1 constructor, instead of all the final methods that had to be called before.
The other major difference is that you're passing the items list to the super class. Now your adapter knows it's size (internally getCount() will be == items.size()) so getView() will be called appropriately.
As a final thought - the adapter is still not using the ViewHolder pattern, which you should totally implement! There's been numerous posts for it, so just search a bit and you'll find it.

This is not a good way to populate a ListView using an adapter which populates the data from multiple ArrayList. Generally we use a single source of dataset to be passed to an adapter in case of showing a list in Android.
So in your case, when you'll call the notifyDatasetChanged it shouldn't take effect in the list properly as far as I can guess.
notifyDatasetChanged basically calls the getCount function of the adapter and checks if the size of the ArrayList associated with the adapter is changed or not. If the size of the ArrayList is changed, it refreshes the ListView and the getView function gets called.
In your case, I don't see any getCount function though. getCount usually returns the size of the ArrayList associated with the adapter.
So I would suggest, using a single ArrayList to be passed to the adapter. You can merge multiple ArrayList and can use one joined HashMap in your case too. Its your decision, exactly how you can pass a single list of your dataset to the adapter to populate them into a ListView.

Create a ListView with selectable rows/change background color of ListView rows when clicked

Problem
I'm trying to create a ListView with selectable items. I want to be able to click on an item in the ListView and have the item change color in the list, and then go on and do something else with the data from the row.
I'm using a SimpleAdapter.
How do I make it so that when I tap on a row, it turns a different color, and then when I tap on a different row, the new row is selected and changed to a new color, and the old row changes back to normal?
Code
Here is my code so far. The DBTools class is has all of the data that I want to be displayed in my ListView organized and taken care of. The getAllReceivers() method returns an ArrayList of HashMap<String, String>s that have all of my data.
MainActivity.java:
public class MainActivity extends ListActivity {
DBTools dbTools = new DBTools(this);
ArrayList<HashMap<String, String>> receiverList;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getActionBar().hide();
setContentView(R.layout.activity_main);
receiverList = dbTools.getAllReceivers();
dbTools.close();
ListView listView = getListView();
if(receiverList.size() != 0) {
SimpleAdapter adapter = new SimpleAdapter(MainActivity.this,receiverList, R.layout.receiver_entry, new String[] {"receiverId","receiverName", "fullPath"}, new int[] {R.id.receiverId, R.id.receiverName, R.id.fullPath});
setListAdapter(adapter);
}
}
}
activity_main.xml:
<?xml version="1.0" encoding="utf-8"?>
<TableLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TableRow
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#android:color/black" >
<TextView
android:id="#+id/titleTextView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center_horizontal"
android:text="My List" />
</TableRow>
<ListView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#android:color/black"
android:id="#android:id/list" />
</TableLayout>
receiver_entry.xml
<?xml version="1.0" encoding="utf-8"?>
<TableRow xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="#+id/tableRow" >
<TextView
android:id="#+id/receiverId"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:visibility="gone" />
<TextView
android:id="#+id/receiverName"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Robotronics" />
<TextView
android:id="#+id/fullPath"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="123.45.678.910:8088/robtrox/find" />
</TableRow>

Solution
The solution to this problem is very simple. We need to add an OnItemClickListener to our ListView to listen for clicks and respond accordingly.
So, in the onCreate() method, once you've made sure that you set of data isn't empty, you're going to want to Override the onItemClick() method to listen for the click and change the color. You're also going to want to keep track of which item you selected for the later steps, so add public int selectionId = -1; at the top of your class. Furthermore, you'll need to let the ListAdapter know that you changed something by calling ((SimpleAdapter) getListAdapter()).notifyDataSetChanged().
if(receiverList.size() != 0) {
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> adapterView, View view, int index, long id) {
view.setBackgroundColor(Color.RED);
TextView receiverIdTextView = (TextView) view.findViewById(R.id.receiverId);
selectionId = Integer.valueOf(receiverIdTextView.getText().toString());
((SimpleAdapter) getListAdapter()).notifyDataSetChanged();
}
});
SimpleAdapter adapter = getNewAdapter();
setListAdapter(adapter);
}
Great! Now we have a working system that will change the color of the row that you tap. But we're not done yet. We need to make sure that the previous selection changes back to the normal color.
For this, we are going to use override the SimpleAdapter's getView() method, which is called everytime the ListView goes to draw the items being displayed in it.
It only actually displays the items it needs to - the ones that you can see. It does not render the ones above or below your screen. So if you have 200 items in a ListView, only 5 or 6, depending on the size of your screen and the size of the items, are being rendered at a time.
To override the getView() method, go up to where you initialize the adapter and change the code to this:
SimpleAdapter adapter = new SimpleAdapter(MainActivity.this,receiverList, R.layout.receiver_entry, new String[] { "receiverId","receiverName", "fullPath"}, new int[] {R.id.receiverId, R.id.receiverName, R.id.fullPath}) {
#Override
public View getView (int position, View convertView, ViewGroup parent) {
View view = super.getView(position, convertView, parent);
TextView receiverIdTextView = (TextView) view.findViewById(R.id.receiverId);
if(receiverIdTextView.getText().toString().equals(String.valueOf(selectionId))) {
view.setBackgroundColor(Color.RED);
} else {
view.setBackgroundColor(Color.WHITE);
}
return view;
}
};
Every time one of the rows is drawn, since the getView() will get called, the ListView will check if the current view has the id of row you selected. If it doesn't, it'll change the background color to white. If it does, it'll change the background color to red.
And voila! That's it! Now you are setting the background color to red when you click on an item in the ListView.
Final Code
MainActivity.java:
public class MainActivity extends ListActivity {
DBTools dbTools = new DBTools(this);
ArrayList<HashMap<String, String>> receiverList;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getActionBar().hide();
setContentView(R.layout.activity_main);
receiverList = dbTools.getAllReceivers();
dbTools.close();
ListView listView = getListView();
if(receiverList.size() != 0) {
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> adapterView, View view, int index, long id) {
view.setBackgroundColor(Color.RED);
TextView receiverIdTextView = (TextView) view.findViewById(R.id.receiverId);
selectionId = Integer.valueOf(receiverIdTextView.getText().toString());
((SimpleAdapter) getListAdapter()).notifyDataSetChanged();
}
});
SimpleAdapter adapter = new SimpleAdapter(MainActivity.this,receiverList, R.layout.receiver_entry, new String[] { "receiverId","receiverName", "fullPath"}, new int[] {R.id.receiverId, R.id.receiverName, R.id.fullPath}) {
#Override
public View getView (int position, View convertView, ViewGroup parent) {
View view = super.getView(position, convertView, parent);
TextView receiverIdTextView = (TextView) view.findViewById(R.id.receiverId);
if(receiverIdTextView.getText().toString().equals(String.valueOf(selectionId))) {
view.setBackgroundColor(Color.RED);
} else {
view.setBackgroundColor(Color.WHITE);
}
return view;
}
};
setListAdapter(adapter);
}
}
}
activity_main.xml:
<?xml version="1.0" encoding="utf-8"?>
<TableLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TableRow
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#android:color/black" >
<TextView
android:id="#+id/titleTextView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center_horizontal"
android:text="My List" />
</TableRow>
<ListView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#android:color/black"
android:id="#android:id/list" />
</TableLayout>
receiver_entry.xml
<?xml version="1.0" encoding="utf-8"?>
<TableRow xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="#+id/tableRow" >
<TextView
android:id="#+id/receiverId"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:visibility="gone" />
<TextView
android:id="#+id/receiverName"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Robotronics" />
<TextView
android:id="#+id/fullPath"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="123.45.678.910:8088/robtrox/find" />
</TableRow>

Custom adapter won't inflate rows in list view

I have created a custom listview and a custom adapter. However, when I show the activity it appears empty (although I made sure and there are people in the array passed to the adapter).
1) Why won't it show the people list? Is there something wrong in my getView or in my onCreate function?
2) How can I make a list view that is surrounded by another view (searchbar on top list at the bottom)?
Here is the adapters getView function:
#Override
public View getView(int postion, View convertView, ViewGroup parent)
{
View rowView = convertView;
if (rowView == null)//set the convert view and the viewholder
{
LayoutInflater inflater = _context.getLayoutInflater();
rowView = inflater.inflate(_layoutResourceId, null,false);
ViewHolder viewHolder = new ViewHolder();
viewHolder._personName = (LargeTest) rowView.findViewById(R.id.personName);
viewHolder._personBirthDate = (TextView) rowView.findViewById(R.id.personBirthDate);
viewHolder._icon = (ImageView) rowView.findViewById(R.id.personPic);
rowView.setTag(viewHolder);
}
ViewHolder holder = (ViewHolder) rowView.getTag();
Person person=_persons.get(postion);//get current person for the list row
String personName = person.get_firstName()+" "+person.get_lastName();
((TextView) holder._personName).setText(personName);
String birthDate=person.get_birthDate()+";"+person.get_hebBirthDate();
holder._personBirthDate.setText(birthDate);
//TODO change icon to a real image for each Person
holder._icon.setImageResource(R.drawable.about_me);//test icon
return rowView;
}
Here is the listview onCreate function:
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
//TODO remove the test case
//addTestPersons();//add a test case
//setContentView(R.layout.person_list_activity);
PersonDbHelper dbHelper=new PersonDbHelper(this);
ArrayList<Person> persons =dbHelper.getAllPeopleAsPersonList();//get list to display
PersonListAdapter adapter=new PersonListAdapter(this, R.layout.person_list_row, persons);
setListAdapter(adapter);
}
And the XML for list_row:
<?xml version="1.0" encoding="utf-8"?>
<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/personPic"
android:layout_width="50dp"
android:layout_height="50dp"
android:src="#drawable/about_me" />
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical" >
<TextView
android:id="#+id/personName"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Person Name"
android:textAppearance="?android:attr/textAppearanceLarge" />
<TextView
android:id="#+id/personBirthDate"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="1990-2001" />
</LinearLayout>
</LinearLayout>

Implement the getCount method in the adapter:
public int getCount(){
return _persons.size();
}
For the second part, add the headerview, create an XML layout for the view that you want to show on top of listview. Inflate it and add as headerview to your listview:
LayoutInflater inflater = this.getLayoutInflater();
View headerView = inflater.inflate(R.layout.header_view, null,false);
getListView().addHeaderView(headerView,null,false);

Because of the naming of the layout, you are passing "R.layout.person_list_row" to your adapter. I assume that you are passing the layout for one item in the array on which the adapter operates on instead of passing the ListView.
The constructor needs the ListView to be passed while in its getView, the layout for the row is constructed (inflated).

Using a checkbox and onListItemClick in listview

What I am trying to accomplish is to have a checkbox in each row, having the ability to check the box separately (for batch deleting) and being able to select the entire row to view data associated with the list item.
I have done a checkbox with a textview but that only lets be select the box and I cant click on the list item to view that items data. I also used checkedTextView but that checks the box where ever you click on the row calling the onListItemClick and thats not what I want either. Is there some what I can separate checking the box from clicking a listview item?
Pretty much trying to do what the gmail app does when selecting messages to delete and view
this is my row layout
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<CheckBox
android:id="#+id/checkBox1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"/>
<TextView
android:id="#+id/nameCheckTV"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignTop="#+id/checkBox1"
android:layout_toRightOf="#+id/checkBox1"
android:paddingTop="5dp"
android:paddingLeft="15dp"
android:text="Name"
android:textAppearance="?android:attr/textAppearanceLarge" />
</RelativeLayout>
creating listview
#Override
public void onActivityCreated(Bundle state){
super.onActivityCreated(state);
lv = getListView();
lv.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
lv.setItemsCanFocus(false);
setEmptyText("No Bowlers");
registerForContextMenu(getListView());
populateList();
}
EDIT:
my populate method
public void populateList(){
String[] fields = new String[] {BowlersDB.NAME};
//mAdapter = new CheckAdapter(getActivity(),R.layout.check_listview,null,fields,new int[] {R.id.nameCheckTV});
mAdapter = new SimpleCursorAdapter(getActivity(),R.layout.check_listview,null,fields,
new int[] {R.id.nameCheckTV});
setListAdapter(mAdapter);
getLoaderManager().initLoader(0,null,this);
}

The issue is that Android doesn't allow you to select list items that have elements on them that are focusable. Try modifying the checkbox on the list item:
android:focusable="false"

I had a strange workaround with this issue. Here is my solution.
Use this for your ListView. Product is just a model object to hold your data in this case:
public class CatalogItemAdapter extends ArrayAdapter<Product> //
{
private ArrayList<Product> products;
private Activity activity;
public CatalogItemAdapter(Context context, int textViewResourceId,
ArrayList<Product> items, Activity activity) //
{
super(context, textViewResourceId, items);
this.products = items;
this.activity = activity;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) //
{
Product product = products.get(position);
if (convertView == null) //
{
LayoutInflater vi = (LayoutInflater) activity
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = vi.inflate(R.layout.catalog_item_stub, null, false);
}
}
}
Somewhere in your onResume(), put this:
listView = (ListView) activity.findViewById(R.id.CatalogProducts);
m_adapter = new CatalogItemAdapter(activity,
R.layout.catalog_item_stub, products, activity);
if (products == null)
products = new ArrayList<Product>();
listView.setAdapter(m_adapter);
R.layout.catalog_item_stub is a layout stub created in XML like so (put the appropriate items in it for you, like the checkbox):
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout android:id="#+id/catalog_item_stub"
android:layout_width="match_parent" android:layout_height="90dp"
xmlns:android="http://schemas.android.com/apk/res/android"
android:padding="5dp">
<LinearLayout android:layout_height="match_parent"
android:layout_width="match_parent" android:weightSum="5"
android:gravity="center_vertical|right">
<TextView android:layout_width="0dp" android:layout_height="match_parent"
android:text="product_title" android:textAppearance="?android:attr/textAppearanceMedium"
android:id="#+id/ProductTitle" android:padding="5dp"
android:layout_weight="2.5" android:textColor="#000000" />
<CheckBox android:padding="5dp" android:layout_height="match_parent"
android:text="select" android:layout_width="0dp" android:id="#+id/chkSelect"
android:layout_weight="1.5" android:textColor="#000000"
android:gravity="right" />
</LinearLayout>
Hopefully this helps! Holler if you need any clarification.

The gmail app uses its own view called CanvasConversationHeaderView that manages its subviews. This method is probably more heavy-weight than what you are looking for.
An easier method would be to make the checkbox not "focusable" (as Alex Lockwood suggests) and then attach an onClick in the XML.
<CheckBox
android:id="#+id/checkBox1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:focusable="false"
android:onClick="onCheckboxClicked"/>
Then in your activity code add
public void onCheckboxClicked(View view) {
RelativeLayout rl = (RelativeLayout)view.getParent();
Log.d(TAG, "Checkbox clicked! getTag returned: " + rl.getTag());
}
EDIT: How to add a tag from SimpleCursorAdapter.bindView
private class MyCursorAdapter extends SimpleCursorAdapter {
public MyCursorAdapter(Context context, int layout, Cursor c, String[] from, int[] to) {
super(context, layout, c, from, to);
}
#Override
public void bindView(View view, Context context, Cursor cursor) {
//Log.d(TAG, "Cursor pos: " + cursor.getPosition());
String name = cursor.getString(
cursor.getColumnIndex(ContactsContract.Contacts.DISPLAY_NAME));
view.setTag(name);
super.bindView(view, context, cursor);
}
}
Note: I set the tag to the View from the bindView call, which is the RelativeLayout at the root of your xml. Look at the onCheckboxClicked method to see how I got the tag.

You need to set an onItemClickListener for your ListView that will start another activity with the info of the row selected when the row is clicked (outside the CheckBox of course). I would recommend having your Activity implement AdapterView.OnItemClickListener which requires the method
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {}
Inside this method you can launch an Activity with details corresponding to the data in the row selected.
Hopefully I understood your question correctly.