I've been trying to figure out how to use the library MaterialLetterIcon for a while now with no success. I have a custom listview with each item using the image below. An imageview that is selected. This xml file is called da_item.xml
Currently, the imageview(#+id/contactImage) does nothing. Here is my List populator.
#Override
public View getView(int position, View convertView, ViewGroup parent) {
final ViewHolder holder;
if (convertView == null) {
holder = new ViewHolder();
convertView = getLayoutInflater().inflate(R.layout.da_item, parent, false);
holder.number = (TextView) convertView.findViewById(R.id.NumberView);
holder.text = (TextView) convertView.findViewById(R.id.NameView);
holder.checkbox = (CheckBox) convertView.findViewById(R.id.checkBox);
holder.checkbox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
#Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
int getPosition = (Integer) buttonView.getTag(); // Here we get the position that we have set for the checkbox using setTag.
list.get(getPosition).setSelected(buttonView.isChecked()); // Set the value of checkbox to maintain its state.
}
});
convertView.setTag(holder);
convertView.setTag(R.id.NameView, holder.text);
convertView.setTag(R.id.NumberView, holder.number);
convertView.setTag(R.id.checkBox, holder.checkbox);
convertView.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
holder.checkbox.setChecked(!holder.checkbox.isChecked());
}
});
holder.text.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
holder.checkbox.setChecked(!holder.checkbox.isChecked());
}
});
holder.number.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
holder.checkbox.setChecked(!holder.checkbox.isChecked());
}
});
} else {
holder = (ViewHolder) convertView.getTag();
}
holder.checkbox.setTag(position); // This line is important.
holder.text.setText(list.get(position).getName());
holder.number.setText(list.get(position).getPhone());
holder.checkbox.setChecked(list.get(position).isSelected());
return convertView;
}
I understand how to to add the library, but I am not sure at all how to actually use it. Any suggestions or other libraries to do the same thing would be appreciated too!
Try to use MaterialLetterIcon like this way,this is exactly what you looking for
ColorGenerator generator = ColorGenerator.MATERIAL; // or use DEFAULT
// generate random color
int color = generator.getColor(getItem(position));
//int color = generator.getRandomColor();
TextDrawable drawable = TextDrawable.builder()
.buildRound(firstLetter, color); // radius in px
For more Check ListViewWithLetterIcon
Related
I have two button increase and decrease and one textview. When I click on increase button the value in the textview is increases and vice versa but when I scroll the listview its get its default value 0. How can I resolve this?
public View getView(final int position, View convertView, ViewGroup parent) {
if (convertView == null) {
LayoutInflater inflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.cart_item, parent, false);
viewHolder = new ViewHolder();
viewHolder.mImgItem = (ImageView) convertView.findViewById(R.id.cart_image);
viewHolder.mTvItemName = (TextView) convertView.findViewById(R.id.tv_item_name);
viewHolder.mTvItemPrice = (TextView) convertView.findViewById(R.id.tv_item_price);
viewHolder.mTvNumber = (TextView) convertView.findViewById(R.id.tv_number);
viewHolder.mBtnAdd = (Button) convertView.findViewById(R.id.btn_add);
viewHolder.mBtnMinus = (Button) convertView.findViewById(R.id.btn_sub);
viewHolder.mImgDelete = (ImageView) convertView.findViewById(R.id.img_del);
viewHolder.mUniqueKey = String.valueOf(position);
} else {
viewHolder = (ViewHolder) convertView.getTag();
}
viewHolder.mBtnAdd.setTag(viewHolder);
viewHolder.mBtnMinus.setTag(viewHolder);
viewHolder.mTvNumber.setText("0");
viewHolder.mBtnAdd.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
ViewHolder tagHolder = (ViewHolder) v.getTag();
int mValue = Integer.parseInt(tagHolder.mTvNumber.getText().toString().trim());
mValue++;
tagHolder.mTvNumber.setText("" + mValue);
});
viewHolder.mBtnMinus.setOnClickListener(
new View.OnClickListener() {
#Override
public void onClick(View v) {
ViewHolder tagHolder = (ViewHolder) v.getTag();
int mValue = Integer.parseInt(tagHolder.mTvNumber.getText().toString());
if (mValue > 0) {
mValue--;
tagHolder.mTvNumber.setText("" + mValue);
}
});
convertView.setTag(viewHolder);
PojoCart pojoCart = (PojoCart) getItem(position);
viewHolder.mTvItemName.setText(pojoCart.getmItemName());
viewHolder.mTvItemPrice.setText(pojoCart.getmItemPrice());
return convertView;
}
Save the value to PojoCart class and retrieve value from it every time just as you are getting itemName and itemPrice. So create an integer quantity in PojoCart class and in the adapter's getView method :
PojoCart pojoCart = (PojoCart) getItem(position);
viewHolder.mBtnAdd.setTag(pojoCart);
viewHolder.mBtnMinus.setTag(pojoCart);
if(pojoCart.getQuantity() > 0)
{
viewHolder.mTvNumber.setText(""+pojoCart.getQuantity());
}
else
{
viewHolder.mTvNumber.setText(""+0);
}
viewHolder.mBtnAdd.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
PojoCart pojoCart = (PojoCart) v.getTag();
int mValue = pojoCart.getQuantity();
mValue++;
tagHolder.mTvNumber.setText("" + mValue);
pojoCart.setQuantity(mValue)
notifyDataSetChanged();
};
You have to save value of textview.
As listview recreate views on scroll it takes default
Just take model class and save values by position
Use adapter.notifyDataSetChanged() to update values in listview when data changes
You need to store the number in each list item for example use this function to change the value of the list item's number:
List<Integer> mList = new ArrayList<>(LIST_SIZE);
int changeNumber(int position, int value){
mList.get(position) += value;
return mList.get(position);
}
u can use this function like:
viewHolder.mBtnAdd.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
ViewHolder tagHolder = (ViewHolder) v.getTag();
int mValue = Integer.parseInt(tagHolder.mTvNumber.getText().toString().trim());
tagHolder.mTvNumber.setText("" + changeNumber(position,1);
});
viewHolder.mBtnMinus.setOnClickListener(
new View.OnClickListener() {
#Override
public void onClick(View v) {
ViewHolder tagHolder = (ViewHolder) v.getTag();
int mValue = Integer.parseInt(tagHolder.mTvNumber.getText().toString());
if (mValue > 0) {
tagHolder.mTvNumber.setText("" + changeNumber(position,-1);
}
});
I have a list with pictures for each item, when I click on an image I need the position of the list.
how can I get this?
I tried to do View.getTag().ToString() but by mistake.
Here's the code:
ImageView im = (ImageView) convertView.findViewById(R.id.imageViewDSD);
im.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
try {
Toast.makeText(contextCustom,
"ImageView clicked for the row = " + v.getTag(),
Toast.LENGTH_SHORT).show();
} catch (Exception e) {
Log.i("Error", "errore vista " + e);
}
}
});
listView.setOnItemClickListener(new OnItemClickListener()
{
#Override
public void onItemClick(AdapterView<?> parent, View view,int position, long id)
{
postion on your image
Toast.makeText(getApplicationContext(), ""+position, Toast.LENGTH_LONG).show();
}
});
On each getView, set the ImageView's tag to be equal to the list item's position.
Then in your listener you can get the tag, and determine which list item this image belongs to.
ImageView im = (ImageView) convertView.findViewById(R.id.imageViewDSD);
im.setTag(position);
Also note that you shouldn't create a new listener every time getView is called, instead do it only when convertView is null. However the tag should always be set regardless of convertView's value.
Edit:
Here's a full example of neat getView method (using a holder pattern to avoid findViewById):
private static class ViewHolder {
ImageView imgView;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
// (Re)Use the convertView
ViewHolder holder;
if (convertView == null) {
convertView = mInflater.inflate(R.layout.list_item, parent, false);
holder = new ViewHolder();
holder.imgView = (ImageView) convertView.findViewById(R.id.imageViewDSD);
holder.imgView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Toast.makeText(contextCustom, "Pos: " + v.getTag(),
Toast.LENGTH_SHORT).show();
}
});
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
holder.imgView.setTag(position);
// Do something else with your image here
return convertView;
}
Hello at all the community,
i've this adapter with 2 button and 2 textview.
#Override
public View getView(int position, View view, ViewGroup parent) {
if(view == null) {
holder = new Holder();
inflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
view = inflater.inflate(R.layout.my_adapter, null);
holder.result = (TextView)view.findViewById(R.id.description);
holder.value = (TextView)view.findViewById(R.id.value);
holder.add = (Button)view.findViewById(R.id.add);
holder.subtract = (Button)view.findViewById(R.id.subtract);
myObject = getItem(position);
holder.result.setText(myObject.result);
holder.value.setText(myObject.value);
view.setTag(holder);
} else {
holder = (Holder)view.getTag();
}
holder.add.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View view) {
// TODO Auto-generated method stub
}
});
return view;
}
Now my question is: if I want that when the user press on add button set the text of the textview with (for example) 5 how can i do this? If I put into the onCLick method
holder.result.setText("My text") set the text of the last textview and not the correspond textview of the selected row item (I disabled the click on the listview with):
#Override
public boolean isEnabled(int position) {
return false;
}
Is there any solution for my problem?
You should put your code in the getView method inside the adapter and remember to use references to the current Button/TextVeiw so that each Button would correspond to that specific TextView
P.S. I found something with your code check this out:
#Override
public View getView(int position, View view, ViewGroup parent) {
if(view == null) {
holder = new Holder();
inflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
view = inflater.inflate(R.layout.my_adapter, null);
holder.result = (TextView)view.findViewById(R.id.description);
holder.value = (TextView)view.findViewById(R.id.value);
holder.add = (Button)view.findViewById(R.id.add);
holder.subtract = (Button)view.findViewById(R.id.subtract);
view.setTag(holder);
} else {
holder = (Holder)view.getTag();
}
myObject = getItem(position);
holder.result.setText(myObject.result);
holder.value.setText(myObject.value);
final TextView tv = holder.result;
holder.add.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View view) {
tv.setText("bla bla");
}
});
return view;
}
You mixed something up, the getItem has to be below the view creation stuff. First create the view, then set the values.
#Override
public View getView(int position, View view, ViewGroup parent) {
if(view == null) {
holder = new Holder();
inflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
view = inflater.inflate(R.layout.my_adapter, null);
holder.result = (TextView)view.findViewById(R.id.description);
holder.value = (TextView)view.findViewById(R.id.value);
holder.add = (Button)view.findViewById(R.id.add);
holder.subtract = (Button)view.findViewById(R.id.subtract);
view.setTag(holder);
} else {
holder = (Holder)view.getTag();
}
myObject = getItem(position);
holder.result.setText(myObject.result);
holder.value.setText(myObject.value);
holder.add.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View view) {
//What should happen here?
}
});
return view;
}
When i am scrolling ListView position of the item changes.My ListView contain 2 Button and 2 TextView. These 2 Button are initially invisible. when user Long click on item i just set the visibility.Its working but when i scroll the ListView ,it changes the position.Why?
I am setting this visibility and invisibility code inside of my adapter class..
here is my code :::
#Override
public View getView(int position, View convertView, ViewGroup parent) {
holder = new ViewHolder();
if (convertView == null) {
convertView = lInflater.inflate(R.layout.message_row, null);
holder.messageDeleteButton = (Button) convertView
.findViewById(R.id.delete_button);
holder.messageTextView = (TextView) convertView
.findViewById(R.id.message);
holder.timeTextView = (TextView) convertView
.findViewById(R.id.time);
holder.copyMessageButton = (ImageButton) convertView
.findViewById(R.id.copy_bt);
holder.messageDeleteButton
.setOnClickListener(new OnClickListener() {
#Override
public void onClick(final View v) {
System.out.println("Delete clicked");
}
});
convertView.setTag(R.layout.message_row, holder);
} else {
holder = (ViewHolder) convertView.getTag(R.layout.message_row);
}
convertView.setTag(position);
holder.messageDeleteButton.setTag(position);
if (mMessageData.get(position).isVisible())
holder.messageDeleteButton.setVisibility(View.VISIBLE);
else
holder.messageDeleteButton.setVisibility(View.GONE);
holder.messageTextView.setText(mMessageData.get(position)
.getMessage_text());
holder.messageTextView.setTypeface(Typeface.createFromAsset(
mContext.getAssets(), "Existence-Light.ttf"));
holder.timeTextView.setText(mMessageData.get(position)
.getMessage_date());
holder.timeTextView.setTypeface(Typeface.createFromAsset(
mContext.getAssets(), "Existence-Light.ttf"));
convertView.setOnTouchListener(mOnTouchListener);
convertView.setOnClickListener(mOnClickListener);
// convertView.setOnLongClickListener(mLongClick);
return convertView;
}
This is my OnTouchListiner code it will working fine.But when i scroll the ListView the buttons positions will changed..
class MyTouchListener implements OnTouchListener {
#SuppressWarnings("deprecation")
private final GestureDetector gestureDetector = new GestureDetector(
new GestureListener());
#Override
public boolean onTouch(View v, MotionEvent event) {
int touch = 0;
ViewHolder holder = (ViewHolder) v.getTag(R.layout.message_row);
animation = new Animater();
int action = event.getAction();
int position = (Integer) v.getTag();
pos = position;
view = v;
switch (action) {
case MotionEvent.ACTION_DOWN:
action_down_x = (int) event.getX();
Log.d("action", "ACTION_DOWN - ");
touch = 0;
break;
case MotionEvent.ACTION_MOVE:
Log.d("action", "ACTION_MOVE - ");
action_up_x = (int) event.getX();
difference = action_down_x - action_up_x;
calcuateDifference(holder, position);
touch = 1;
break;
case MotionEvent.ACTION_UP:
Log.d("action", "ACTION_UP - ");
// calcuateDifference(holder, position);
action_down_x = 0;
action_up_x = 0;
difference = 0;
// touch = 2;
break;
}
return gestureDetector.onTouchEvent(event);
}
public GestureDetector getGestureDetector() {
return gestureDetector;
}
}
In this gestuer class when i tap on ListView just display one more Button.This also be changed the position
public class GestureListener extends SimpleOnGestureListener{
#SuppressLint("NewApi")
#Override
public void onLongPress(MotionEvent e) {
// TODO Auto-generated method stub
super.onLongPress(e);
final ViewHolder hold = (ViewHolder) view.getTag(R.layout.message_row);
hold.copyMessageButton.setVisibility(View.VISIBLE);
hold.copyMessageButton.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View arg0) {
System.out.println("hello you click me..");
});
}
}
What is the wrong on my code..Any one please help me...
Android ListView use Adapters to recycle views that's why ListView position changes while scrolling to conserve memory.See the Google I/O presentation given by Romain Guy to understand how adapters work. http://www.youtube.com/watch?v=N6YdwzAvwOA
Also check the below links,
http://strangevikas.wordpress.com/tag/how-adapter-works-in-android-android-and-adapters/
http://www.edureka.in/blog/what-are-adapters-in-android/
You just need to do some modification in your code like:
#Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder = new ViewHolder();
if (convertView == null) {
convertView = lInflater.inflate(R.layout.message_row, null);
holder.messageDeleteButton = (Button) convertView
.findViewById(R.id.delete_button);
holder.messageTextView = (TextView) convertView
.findViewById(R.id.message);
holder.timeTextView = (TextView) convertView
.findViewById(R.id.time);
holder.copyMessageButton = (ImageButton) convertView
.findViewById(R.id.copy_bt);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
holder.messageDeleteButton.setTag(mMessageData.get(position));
holder.messageDeleteButton
.setOnClickListener(new OnClickListener() {
#Override
public void onClick(final View v) {
// message data can be retrieved here like
MessageData mData = (MessageData) v.getTag();
System.out.println("Delete clicked");
}
});
if (mMessageData.get(position).isVisible())
holder.messageDeleteButton.setVisibility(View.VISIBLE);
else
holder.messageDeleteButton.setVisibility(View.GONE);
holder.messageTextView.setText(mMessageData.get(position)
.getMessage_text());
holder.messageTextView.setTypeface(Typeface.createFromAsset(
mContext.getAssets(), "Existence-Light.ttf"));
holder.timeTextView.setText(mMessageData.get(position)
.getMessage_date());
holder.timeTextView.setTypeface(Typeface.createFromAsset(
mContext.getAssets(), "Existence-Light.ttf"));
return convertView;
}
I am making a list view that contains (amongst a few other things) 2 ImageViews and a TextView. The two ImageViews are plus and minus icons, when they are pressed, they need to update the number inside the TextView. They also need to trigger code that will update the sum of the TextViews, below the ListView.
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if (convertView == null) {
holder = new ViewHolder();
convertView = mInflater.inflate(R.layout.basket_item, null);
holder.plus = (ImageView) convertView.findViewById(R.id.count_add);
holder.minus = (ImageView) convertView.findViewById(R.id.count_minus);
holder.counter = (TextView) convertView.findViewById(R.id.text_counter);
convertView.setTag(holder);
}
else {
holder = (ViewHolder) convertView.getTag();
}
holder.id = position;
holder.counter.setId(position);
holder.counter.setText(count[position]);
holder.plus.setId(position);
holder.plus.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
int id = v.getId();
if (count[id] < 999) {
count[id]++;
totalcount++;
}
}
});
holder.minus.setId(position);
holder.minus.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
int id = v.getId();
if (count[id] > 1) {
count[id]--;
totalCount--;
}
}
});
return convertView;
}
}
class ViewHolder {
ImageView plus;
ImageView minus;
TextView counter;
int id;
}
I believe, to update the counter in the TextView, I need to somehow get my 'holder' inside the OnClickListner, however, as it is not declared as final, I can't.
Is there an easier way to do this, or am I missing a trick here?
Try implement the notifyDataSetChanged() that calls the getView once again. And after that invalidate the textView. But I am not fully sure about the need to call invalidate() here.
public void onClick(View v) {
int id = v.getId();
if (count[id] > 1) {
count[id]--;
totalCount--;
notifyDataSetChanged();
holder.counter.invalidate();
}
}
});
I am not sure about it.I hope it do. Try to paste this line under the Onclick method itself.
"holder.counter.setText('YOUR TEXT totalcount');"