リモート サーバー上のデータベースから受信したフラグに基づいて、行の背景色を変更しようとしています。
私のコードでは、フラグが立てられたすべての位置を保持する disable という ArrayList を作成します。無効化リストの内容を ListView の位置に一致させたい。私はいくつかの投稿を調査しましたが、これを行う方法を明示的に示しているものはありません。見つけたものをつなぎ合わせて、以下のカスタムアダプターに入れました。
私が理解していることから、 public int getItemViewType(int position) は、条件に基づいて特定の行を選択し、そのプロパティを変更できます。この条件が満たされたときに背景を変更するにはどうすればよいですか? 私のプログラムの getItemViewType(int position) のコードは機能しませんが、私が何をしようとしているのかを見ることができます。
質問 1 : xml レイアウト ファイルを 2 つ作成する必要がありますか? 1 つは通常表示用で、もう 1 つは無効表示用ですか? 質問 2: 私が従うことができるこれを達成した例を知っていますか?
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*/;
}
}
ログキャット:
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
- - - - - - - - - - - - - アップデート - - - - - - - - - - - - ------ getItem() メソッドを削除してこの例外エラーを修正すると、リスト内のいくつかのビューで黄色の背景が表示されるようになりました。
現在の問題は while ループにあります。リストビューとフラグ付きアイテムを比較して、フラグ付きアイテムに黄色の背景のみを配置しようとしています。ただし、4 ビューごとに黄色の背景が表示されます。これは私が意図していることではありません。While ループや for ループのロジックを修正して、黄色の背景を正しい位置/ビューに一致させるにはどうすればよいか教えてください。
更新されたコードは次のとおりです。
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*/;
}
}
ログキャット:
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(......
ご協力いただきありがとうございます！