I'm trying to change the background color of a row based upon a flag received from the database on a remote server.
In my code, I create an ArrayList called disable that holds all of the positions that were flagged. I want to match what is in disable's list to the positions in my ListView. I have researched several postings and none of them explicitly show how to do this. I've pieced together what I found and put it in the custom adapter below.
From what I understand public int getItemViewType(int position) can select a specific row based on a condition and change it's properties. How do I change the background when this condition is met? The code in getItemViewType(int position) in my program does not work, but you can see what I am trying to do.
Question 1 : Do I need to make two xml layout files? One for normal view and the other disable view? Question 2: Do you know of any examples that have accomplished this that I can follow?
package com.convention.notification.app;
import java.util.List;
import android.app.Activity;
import android.content.Context;
import android.graphics.Color;
import android.os.Bundle;
import android.text.Html;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.TextView;
public class NewsRowAdapter extends ArrayAdapter<Item> {
private Activity activity;
private List<Item> items;
private Item objBean;
private int row;
private List<Integer> disable;
View view ;
public NewsRowAdapter(Activity act, int resource, List<Item> arrayList, List<Integer> disableList) {
super(act, resource, arrayList);
this.activity = act;
this.row = resource;
this.items = arrayList;
this.disable=disableList;
System.out.println("results of delete list a:"+disable.toString());
}
public int getCount(){
return items.size();
}
public Item getItem(int position){
return null;
}
public long getItemId(int position){
return position;
}
@Override
public int getViewTypeCount() {
return 2;
}
@Override
public int getItemViewType(int position) {
for (int s: disable){
if (s == position){
// view.setBackgroundColor(Color.YELLOW);
}
}
return position;
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
view = convertView;
ViewHolder holder;
if (view == null) {
//ViewHolder is a custom class that gets TextViews by name
holder = new ViewHolder();
LayoutInflater inflater = (LayoutInflater) activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
view = inflater.inflate(row, null);
// holder.txtViewDescription = (TextView) convertView.findViewById(R.id.txtViewDescription);
/* setTag Sets the tag associated with this view. A tag can be used to
* mark a view in its hierarchy and does not have to be unique
* within the hierarchy. Tags can also be used to store data within
* a view without resorting to another data structure.
*/
view.setTag(holder);
} else {
//the Object stored in this view as a tag
holder = (ViewHolder) view.getTag();
}
if ((items == null) || ((position + 1) > items.size())){
return view;
}
objBean = items.get(position);
holder.tv_event_name = (TextView) view.findViewById(R.id.tv_event_name);
holder.tv_event_date = (TextView) view.findViewById(R.id.tv_event_date);
holder.tv_event_start = (TextView) view.findViewById(R.id.tv_event_start);
holder.tv_event_end = (TextView) view.findViewById(R.id.tv_event_end);
holder.tv_event_location = (TextView) view.findViewById(R.id.tv_event_location);
if (holder.tv_event_name != null && null != objBean.getName()
&& objBean.getName().trim().length() > 0) {
holder.tv_event_name.setText(Html.fromHtml(objBean.getName()));
}
if (holder.tv_event_date != null && null != objBean.getDate()
&& objBean.getDate().trim().length() > 0) {
holder.tv_event_date.setText(Html.fromHtml(objBean.getDate()));
}
if (holder.tv_event_start != null && null != objBean.getStartTime()
&& objBean.getStartTime().trim().length() > 0) {
holder.tv_event_start.setText(Html.fromHtml(objBean.getStartTime()));
}
if (holder.tv_event_end != null && null != objBean.getEndTime()
&& objBean.getEndTime().trim().length() > 0) {
holder.tv_event_end.setText(Html.fromHtml(objBean.getEndTime()));
}
if (holder.tv_event_location != null && null != objBean.getLocation ()
&& objBean.getLocation ().trim().length() > 0) {
holder.tv_event_location.setText(Html.fromHtml(objBean.getLocation ()));
}
return view;
}
public class ViewHolder {
public TextView
tv_event_name,
tv_event_date,
tv_event_start,
tv_event_end,
tv_event_location
/*tv_event_delete_flag*/;
}
}
Logcat:
06-11 00:06:43.133: D/dalvikvm(60): GC_EXPLICIT freed 230K, 45% free 4939K/8839K, external 3511K/3903K, paused 81ms
06-11 00:06:43.133: I/installd(34): unlink /data/dalvik-cache/data@app@com.convention.notification.app-1.apk@classes.dex
06-11 00:06:43.133: D/AndroidRuntime(528): Shutting down VM
06-11 00:06:43.173: D/dalvikvm(528): GC_CONCURRENT freed 101K, 72% free 295K/1024K, external 0K/0K, paused 1ms+0ms
06-11 00:06:43.173: D/jdwp(528): Got wake-up signal, bailing out of select
06-11 00:06:43.173: D/dalvikvm(528): Debugger has detached; object registry had 1 entries
06-11 00:06:43.203: I/dalvikvm(528): JNI: AttachCurrentThread (from ???.???)
06-11 00:06:43.203: I/AndroidRuntime(528): NOTE: attach of thread 'Binder Thread #3' failed
06-11 00:06:43.653: D/AndroidRuntime(542): >>>>>> AndroidRuntime START com.android.internal.os.RuntimeInit <<<<<<
06-11 00:06:43.653: D/AndroidRuntime(542): CheckJNI is ON
06-11 00:06:44.223: D/AndroidRuntime(542): Calling main entry com.android.commands.am.Am
06-11 00:06:44.243: I/ActivityManager(60): Starting: Intent { act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] flg=0x10000000 cmp=com.convention.notification.app/.DataView } from pid 542
06-11 00:06:44.273: I/ActivityManager(60): Start proc com.convention.notification.app for activity com.convention.notification.app/.DataView: pid=550 uid=10042 gids={3003}
06-11 00:06:44.323: D/AndroidRuntime(542): Shutting down VM
06-11 00:06:44.323: D/dalvikvm(542): GC_CONCURRENT freed 103K, 69% free 319K/1024K, external 0K/0K, paused 1ms+1ms
06-11 00:06:44.334: D/dalvikvm(542): Debugger has detached; object registry had 1 entries
06-11 00:06:45.503: I/ActivityManager(60): Displayed com.convention.notification.app/.DataView: +1s233ms
06-11 00:06:47.163: I/System.out(550): item disalbed is at postion :1
06-11 00:06:47.163: I/System.out(550): item disalbed is at postion :6
06-11 00:06:47.163: I/System.out(550): item disalbed is at postion :14
06-11 00:06:47.163: I/System.out(550): item disalbed is at postion :15
06-11 00:06:47.163: I/System.out(550): item disalbed is at postion :18
06-11 00:06:47.163: I/System.out(550): results of delete list :[1, 6, 14, 15, 18]
06-11 00:06:47.163: I/System.out(550): results of delete list in Adapeter:[1, 6, 14, 15, 18]
06-11 00:06:47.173: I/System.out(550): set adapaer to list view called;
06-11 00:06:50.693: D/dalvikvm(237): GC_EXPLICIT freed 8K, 51% free 2725K/5511K, external 1625K/2137K, paused 61ms
06-11 00:06:55.783: D/dalvikvm(264): GC_EXPLICIT freed 17K, 52% free 2778K/5703K, external 1625K/2137K, paused 98ms
06-11 00:07:05.163: D/dalvikvm(308): GC_EXPLICIT freed 15K, 49% free 3363K/6535K, external 1625K/2137K, paused 43ms
06-11 00:07:10.284: D/dalvikvm(361): GC_EXPLICIT freed 15K, 48% free 3523K/6727K, external 1625K/2137K, paused 102ms
06-11 00:07:15.303: D/dalvikvm(378): GC_EXPLICIT freed 6K, 51% free 2718K/5511K, external 1625K/2137K, paused 73ms
06-11 00:07:20.383: D/dalvikvm(201): GC_EXPLICIT freed 21K, 50% free 2995K/5959K, external 1625K/2137K, paused 121ms
06-11 00:07:25.463: D/dalvikvm(130): GC_EXPLICIT freed 114K, 48% free 3089K/5895K, external 4932K/5608K, paused 124ms
06-11 00:11:22.113: D/SntpClient(60): request time failed: java.net.SocketException: Address family not supported by protocol
--------------------------update----------------------------- I fix this exception error by removing getItem() methods and I'm able to see yellow backgrounds on a few views in the list.
The current issue is in the while loop. I am trying to compare my listview with the flagged items and only put a yellow background on the Flagged items. However, I am getting a yellow background on every fourth view. This is not what I intend to do. Can you suggest to me what to do to fix the logic in the While loop and/or for loop to get the yellow background matched with the correct position/view?
Here is the updated code:
package com.convention.notification.app;
import java.util.List;
import android.app.Activity;
import android.content.Context;
import android.graphics.Color;
import android.os.Bundle;
import android.text.Html;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.TextView;
public class NewsRowAdapter extends ArrayAdapter<Item> {
private Activity activity;
private List<Item> items;
private Item objBean;
private int row;
private List<Integer> disable;
View view ;
public NewsRowAdapter(Activity act, int resource, List<Item> arrayList, List<Integer> disableList) {
super(act, resource, arrayList);
this.activity = act;
this.row = resource;
this.items = arrayList;
this.disable=disableList;
System.out.println("results of delete list a:"+disable.toString());
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
View view = convertView;
ViewHolder holder;
if (view == null) {
LayoutInflater inflater = (LayoutInflater) activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
view = inflater.inflate(row, null);
try{
int j = 0;
while (j < items.size()) {
for(int k =0;k< disable.size();k++){
if(position == disable.get(k)){
view.setBackgroundColor(Color.YELLOW);
System.out.println("background set to yellow at disable "+disable.get(j));
System.out.println("background set to yellow at position "+position);
} else {
view.setBackgroundColor(Color.WHITE);
System.out.println("background set to white at position "+position);
}
}
j++;
}
}catch(IndexOutOfBoundsException e){
System.out.println(" crash");
}
//ViewHolder is a custom class that gets TextViews by name: tvName, tvCity, tvBDate, tvGender, tvAge;
holder = new ViewHolder();
/* setTag Sets the tag associated with this view. A tag can be used to
* mark a view in its hierarchy and does not have to be unique
* within the hierarchy. Tags can also be used to store data within
* a view without resorting to another data structure.
*/
view.setTag(holder);
} else {
//the Object stored in this view as a tag
holder = (ViewHolder) view.getTag();
}
if ((items == null) || ((position + 1) > items.size()))
return view;
objBean = items.get(position);
holder.tv_event_name = (TextView) view.findViewById(R.id.tv_event_name);
holder.tv_event_date = (TextView) view.findViewById(R.id.tv_event_date);
holder.tv_event_start = (TextView) view.findViewById(R.id.tv_event_start);
holder.tv_event_end = (TextView) view.findViewById(R.id.tv_event_end);
holder.tv_event_location = (TextView) view.findViewById(R.id.tv_event_location);
if (holder.tv_event_name != null && null != objBean.getName()
&& objBean.getName().trim().length() > 0) {
holder.tv_event_name.setText(Html.fromHtml(objBean.getName()));
}
if (holder.tv_event_date != null && null != objBean.getDate()
&& objBean.getDate().trim().length() > 0) {
holder.tv_event_date.setText(Html.fromHtml(objBean.getDate()));
}
if (holder.tv_event_start != null && null != objBean.getStartTime()
&& objBean.getStartTime().trim().length() > 0) {
holder.tv_event_start.setText(Html.fromHtml(objBean.getStartTime()));
}
if (holder.tv_event_end != null && null != objBean.getEndTime()
&& objBean.getEndTime().trim().length() > 0) {
holder.tv_event_end.setText(Html.fromHtml(objBean.getEndTime()));
}
if (holder.tv_event_location != null && null != objBean.getLocation ()
&& objBean.getLocation ().trim().length() > 0) {
holder.tv_event_location.setText(Html.fromHtml(objBean.getLocation ()));
}
return view;
}
public class ViewHolder {
public TextView
tv_event_name,
tv_event_date,
tv_event_start,
tv_event_end,
tv_event_location
/*tv_event_delete_flag*/;
}
}
Logcat:
06-11 10:54:45.063: I/System.out(1692): item disalbed is at postion :1
06-11 10:54:45.063: I/System.out(1692): item disalbed is at postion :6
06-11 10:54:45.063: I/System.out(1692): item disalbed is at postion :14
06-11 10:54:45.063: I/System.out(1692): item disalbed is at postion :15
06-11 10:54:45.073: I/System.out(1692): item disalbed is at postion :18
06-11 10:54:45.073: I/System.out(1692): results of delete list :[1, 6, 14, 15, 18]
06-11 10:54:45.073: I/System.out(1692): results of delete list a:[1, 6, 14, 15, 18]
06-11 10:54:45.073: I/System.out(1692): set adapaer to list view called;
06-11 10:54:45.183: I/System.out(1692): background set to white at position 0
06-11 10:54:45.393: I/System.out(1692): background set to white at position 0
06-11 10:54:45.393: I/System.out(1692): background set to white at position 0
06-11 10:54:45.393: I/System.out(1692): background set to white at position 0
06-11 10:54:45.393: I/System.out(1692): background set to white at position 0
06-11 10:54:45.393: I/System.out(1692): background set to white at position 0
06-11 10:54:45.393: I/System.out(1692): background set to white at position 0
06-11 10:54:45.403: I/System.out(1692): background set to white at position 0
06-11 10:54:45.403: I/System.out(1692): background set to white at position 0
06-11 10:54:45.403: I/System.out(1692): background set to white at position 0
06-11 10:54:45.403: I/System.out(1692): background set to white at position 0
06-11 10:54:45.403: I/System.out(1692): background set to white at position 0
06-11 10:54:45.403: I/System.out(1692): background set to white at position 0
06-11 10:54:45.573: I/System.out(1692): background set to yellow at disable list 1
06-11 10:54:45.573: I/System.out(1692): background set to yellow at position 1
06-11 10:54:45.573: I/System.out(1692): background set to white at position 1
06-11 10:54:45.573: I/System.out(1692): background set to white at position 1
06-11 10:54:45.573: I/System.out(1692): background set to white at position 1
06-11 10:54:45.573: I/System.out(1692): background set to white at position 1
06-11 10:54:45.573: I/System.out(1692): background set to yellow at disable list 6
06-11 10:54:45.573: I/System.out(1692): background set to yellow at position 1
06-11 10:54:45.573: I/System.out(1692): background set to white at position 1
06-11 10:54:45.573: I/System.out(1692): background set to white at position 1
06-11 10:54:45.573: I/System.out(1692): background set to white at position 1
06-11 10:54:45.573: I/System.out(1692): background set to white at position 1
06-11 10:54:45.573: I/System.out(1692): background set to yellow at disable list 14
06-11 10:54:45.573: I/System.out(1692): background set to yellow at position 1
06-11 10:54:45.583: I/System.out(1692): background set to white at position 1
06-11 10:54:45.583: I/System.out(1692): background set to white at position 1
06-11 10:54:45.583: I/System.out(1692): background set to white at position 1
06-11 10:54:45.583: I/System.out(1692): background set to white at position 1
06-11 10:54:45.583: I/System.out(1692): background set to yellow at disable list 15
06-11 10:54:45.583: I/System.out(1692): background set to yellow at position 1
06-11 10:54:45.583: I/System.out(1692): background set to white at position 1
06-11 10:54:45.583: I/System.out(1692): background set to white at position 1
06-11 10:54:45.583: I/System.out(1692): background set to white at position 1
06-11 10:54:45.583: I/System.out(1692): background set to white at position 1
06-11 10:54:45.583: I/System.out(1692): background set to yellow at disable list 18
06-11 10:54:45.583: I/System.out(1692): background set to yellow at position 1
06-11 10:54:45.583: I/System.out(1692): background set to white at position 1
06-11 10:54:45.583: I/System.out(1692): background set to white at position 1
06-11 10:54:45.583: I/System.out(1692): background set to white at position 1
06-11 10:54:45.583: I/System.out(1692): background set to white at position 1
06-11 10:54:45.593: I/System.out(1692): crash
06-11 10:54:45.623: I/System.out(1692): background set to white at position 2
06-11 10:54:45.623: I/System.out(1692): background set to white at position 2
06-11 10:54:45.623: I/System.out(1692): background set to white at position 2
06-11 10:54:45.623: I/System.out(1692): background set to white at position 2
06-11 10:54:45.623: I/System.out(1692): background set to white at position 2
06-11 10:54:45.623: I/System.out(1692): background set to white at position 2
06-11 10:54:45.623: I/System.out(1692): background set to white at position 2
06-11 10:54:45.623: I/System.out(1692): background set to white at position 2
06-11 10:54:45.623: I/System.out(1692): background set to white at position 2
06-11 10:54:45.623: I/System.out(1692): background set to white at position 2
06-11 10:54:45.623: I/System.out(1692): background set to white at position 2
06-11 10:54:45.623: I/System.out(1692): background set to white at position 2
06-11 10:54:45.623: I/Sys....3,4,....
06-11 10:54:46.163: I/System.out(1692): background set to white at position 5
06-11 10:54:46.163: I/System.out(1692): background set to white at position 5
06-11 10:54:46.163: I/System.out(1692): background set to white at position 5
06-11 10:54:46.163: I/System.out(1692): background set to white at position 5
06-11 10:54:46.163: I/System.out(1692): background set to white at position 5
06-11 10:54:46.163: I/System.out(1692): background set to white at position 5
06-11 10:54:46.163: I/System.out(1692): background set to white at position 5
06-11 10:54:46.163: I/System.out(1692): background set to white at position 5
06-11 10:54:46.173: I/System.out(1692): background set to white at position 5
06-11 10:54:46.173: I/System.out(1692): background set to white at position 5
06-11 10:54:46.173: I/System.out(1692): background set to white at position 5
06-11 10:54:46.173: I/System.out(1692): background set to white at position 5
06-11 10:54:46.173: I/System.out(1692): background set to white at position 5
06-11 10:54:46.173: I/System.out(1692): background set to white at position 5
06-11 10:54:46.173: I/System.out(1692): background set to white at position 5
06-11 10:54:46.173: I/System.out(1692): background set to white at position 5
06-11 10:54:46.173: I/System.out(1692): background set to white at position 5
06-11 10:54:46.173: I/System.out(1692): background set to white at position 5
06-11 10:54:46.183: I/System.out(1692): background set to white at position 5
06-11 10:54:46.183: I/System.out(1692): background set to white at position 5
06-11 10:54:46.183: I/System.out(1692): background set to white at position 5
06-11 10:54:46.183: I/System.out(1692): background set to white at position 5
06-11 10:54:46.183: I/System.out(1692): background set to white at position 5
06-11 10:54:46.183: I/System.out(1692): background set to white at position 5
06-11 10:54:46.183: I/System.out(1692): background set to white at position 5
06-11 10:54:46.183: I/System.out(1692): background set to white at position 5
06-11 10:54:46.183: I/System.out(1692): background set to white at position 5
06-11 10:54:46.183: I/System.out(1692): background set to white at position 5
06-11 10:54:46.183: I/System.out(1692): background set to white at position 5
06-11 10:54:46.183: I/System.out(1692): background set to white at position 5
06-11 10:54:46.183: I/System.out(1692): background set to white at position 5
06-11 10:54:46.193: I/System.out(1692): background set to white at position 5
06-11 10:54:46.193: I/System.out(1692): background set to white at position 5
06-11 10:54:46.193: I/System.out(1692): background set to white at position 5
06-11 10:54:46.193: I/System.out(1692): background set to white at position 5
06-11 10:54:46.193: I/System.out(1692): background set to white at position 5
06-11 10:54:46.193: I/System.out(1692): background set to white at position 5
06-11 10:54:46.193: I/System.out(1692): background set to white at position 5
06-11 10:54:46.203: I/System.out(1692): background set to white at position 5
06-11 10:54:46.203: I/System.out(1692): background set to white at position 5
06-11 10:54:46.203: I/System.out(1692): background set to white at position 5
06-11 10:54:46.203: I/System.out(1692): background set to white at position 5
06-11 10:54:46.203: I/System.out(1692): background set to white at position 5
06-11 10:54:46.203: I/System.out(1692): background set to white at position 5
06-11 10:54:46.203: I/System.out(1692): background set to white at position 5
06-11 10:54:46.203: I/System.out(1692): background set to white at position 5
06-11 10:54:46.283: I/System.out(1692): background set to white at position 6
06-11 10:54:46.283: I/System.out(1692): background set to yellow at disable list 1
06-11 10:54:46.283: I/System.out(1692): background set to yellow at position 6
06-11 10:54:46.283: I/System.out(1692): background set to white at position 6
06-11 10:54:46.283: I/System.out(1692): background set to white at position 6
06-11 10:54:46.283: I/System.out(1692): background set to white at position 6
06-11 10:54:46.283: I/System.out(1692): background set to white at position 6
06-11 10:54:46.283: I/System.out(1692): background set to yellow at disable list 6
06-11 10:54:46.283: I/System.out(1692): background set to yellow at position 6
06-11 10:54:46.283: I/System.out(1692): background set to white at position 6
06-11 10:54:46.283: I/System.out(1692): background set to white at position 6
06-11 10:54:46.283: I/System.out(1692): background set to white at position 6
06-11 10:54:46.283: I/System.out(1692): background set to white at position 6
06-11 10:54:46.283: I/System.out(1692): background set to yellow at disable list 14
06-11 10:54:46.283: I/System.out(1692): background set to yellow at position 6
06-11 10:54:46.283: I/System.out(1692): background set to white at position 6
06-11 10:54:46.283: I/System.out(1692): background set to white at position 6
06-11 10:54:46.293: I/System.out(1692): background set to white at position 6
06-11 10:54:46.293: I/System.out(1692): background set to white at position 6
06-11 10:54:46.293: I/System.out(1692): background set to yellow at disable list 15
06-11 10:54:46.293: I/System.out(1692): background set to yellow at position 6
06-11 10:54:46.293: I/System.out(1692): background set to white at position 6
06-11 10:54:46.293: I/System.out(1692): background set to white at position 6
06-11 10:54:46.303: I/System.out(1692): background set to white at position 6
06-11 10:54:46.303: I/System.out(1692): background set to white at position 6
06-11 10:54:46.303: I/System.out(1692): background set to yellow at disable list 18
06-11 10:54:46.303: I/System.out(1692): background set to yellow at position 6
06-11 10:54:46.303: I/System.out(1692): background set to white at position 6
06-11 10:54:46.303: I/System.out(1692): background set to white at position 6
06-11 10:54:46.303: I/System.out(1692): background set to white at position 6
06-11 10:54:46.303: I/System.out(1692): background set to white at position 6
06-11 10:54:46.303: I/System.out(1692): crash
06-11 10:54:46.353: I/System.out(1692): background set to white at position 7
06-11 10:54:46.353: I/System.out(1692): background set to white at position 7
06-11 10:54:46.353: I/System.out(1692): background set to white at position 7
06-11 10:54:46.353: I/System.out(1692): background set to white at position 7
06-11 10:54:46.353: I/System.out(1692): background set to white at position 7
06-11 10:54:46.353: I/System.out(......
Thanks for your help!
