我有一个名单，我想根据名称开头的字母将颜色更改为行。这就是我用来显示ListView：
main.xml中
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<ListView android:id="@+id/listview"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
/>
</LinearLayout>
lisviewrows.xml
<?xml version="1.0" encoding="UTF-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
</TextView>
main.java
public class Main extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
List<String> words = populateList();
List<String> l = removeDoubles(words);
Collections.sort(l);
ListView lv = (ListView)findViewById(R.id.listview);
ArrayAdapter<String> adapter = new ArrayAdapter<String>(getApplicationContext(), R.layout.listviewrows, l);
lv.setAdapter(adapter);
lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
}
});
}
您可以提供一些有用的链接或一些示例吗？
谢谢！
答案 0 :(得分：14)
为此，您需要创建自己的自定义适配器。在getView方法（返回要为每个列表项显示的视图）中，将所需的颜色应用于TextView的背景。 关于customAdapters的一个很酷的事情是，你可以做任何事情，并为列表项显示更复杂的视图，因为你不再受限于TextViews，你可以将列表项XML布局更改为任何类型的视图/布局..
这样的事情：
<强> MyAdapter.java
public class MyAdapter extends BaseAdapter{
private LayoutInflater inflater;
private ArrayList<String> data;
public MyAdapter(Context context, ArrayList<String> data){
// Caches the LayoutInflater for quicker use
this.inflater = LayoutInflater.from(context);
// Sets the events data
this.data= data;
}
public int getCount() {
return this.data.size();
}
public String getItem(int position) throws IndexOutOfBoundsException{
return this.data.get(position);
}
public long getItemId(int position) throws IndexOutOfBoundsException{
if(position < getCount() && position >= 0 ){
return position;
}
}
public int getViewTypeCount(){
return 1;
}
public View getView(int position, View convertView, ViewGroup parent){
String myText = getItem(position);
if(convertView == null){ // If the View is not cached
// Inflates the Common View from XML file
convertView = this.inflater.inflate(R.id.my_row_layout, null);
}
// Select your color and apply it to your textview
int myColor;
if(myText.substring(0, 1) == "a"){
myColor = Color.BLACK;
}else{
....
}
convertView.findViewById(R.id.myTextViewId).setBackground(myColor);
// Of course you will need to set the same ID in your item list XML layout.
return convertView;
}
}
然后在您的活动中设置适配器，如下所示：
public class Main extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
List<String> words = populateList();
List<String> l = removeDoubles(words);
Collections.sort(l);
ListView lv = (ListView)findViewById(R.id.listview);
MyAdapter adapter = new MyAdapter(getApplicationContext(), l);
lv.setAdapter(adapter);
lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
}
});
}
答案 1 :(得分：2)
MainActivity:
import java.util.ArrayList;
import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.os.Bundle;
import android.view.View;
import android.widget.Adapter;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ListView;
public class ListViewImagesActivity extends Activity {
ListView list;
public Integer[] mgriArray = { R.drawable.angry0, R.drawable.neutral0,
R.drawable.fblack0, R.drawable.misc0, R.drawable.notok0,
R.drawable.panel011, R.drawable.pleasure0, R.drawable.rage0,
R.drawable.sad0, R.drawable.stupidity0, R.drawable.sa0,
R.drawable.tree0, R.drawable.victorious0,R.drawable.image_53,
R.drawable.image_13
};
ArrayList<ItemDetails> image_details;
Adapter griAdapter;
public static SharedPreferences pref;
static Editor editor;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
pref = getSharedPreferences("share", 0);
editor = pref.edit();
list = (ListView) findViewById(R.id.listV_main);
image_details = GetSearchResults3();
list.setAdapter(new ItemListBaseAdapter(this, image_details, mgriArray));
list.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View v,
int position, long id) {
Object o = list.getItemAtPosition(position);
ItemDetails obj_itemDetails = (ItemDetails) o;
String namee = obj_itemDetails.getName();
editor.putString("name", namee);
// commit changes
editor.commit();
// switch..................
switch (position) {
case 0:
Intent i1 = new Intent(ListViewImagesActivity.this,
AndroidGridLayoutActivity.class);
startActivity(i1);
break;
case 1:
Intent i2 = new Intent(ListViewImagesActivity.this,
AndroidGridLayoutActivity2.class);
startActivity(i2);
break;
case 2:
Intent i3 = new Intent(ListViewImagesActivity.this,
AndroidGridLayoutActivity3.class);
startActivity(i3);
break;
case 3:
Intent i4 = new Intent(ListViewImagesActivity.this,
AndroidGridLayoutActivity4.class);
startActivity(i4);
break;
case 4:
Intent i5 = new Intent(ListViewImagesActivity.this,
AndroidGridLayoutActivity5.class);
startActivity(i5);
break;
case 5:
Intent i6 = new Intent(ListViewImagesActivity.this,
AndroidGridLayoutActivity6.class);
startActivity(i6);
break;
case 6:
Intent i7 = new Intent(ListViewImagesActivity.this,
AndroidGridLayoutActivity7.class);
startActivity(i7);
break;
case 7:
Intent i8 = new Intent(ListViewImagesActivity.this,
AndroidGridLayoutActivity8.class);
startActivity(i8);
break;
case 8:
Intent i9 = new Intent(ListViewImagesActivity.this,
AndroidGridLayoutActivity9.class);
startActivity(i9);
break;
case 9:
Intent i10 = new Intent(ListViewImagesActivity.this,
AndroidGridLayoutActivity10.class);
startActivity(i10);
break;
case 10:
Intent i11 = new Intent(ListViewImagesActivity.this,
AndroidGridLayoutActivity11.class);
startActivity(i11);
break;
case 11:
Intent i12 = new Intent(ListViewImagesActivity.this,
AndroidGridLayoutActivity12.class);
startActivity(i12);
break;
case 12:
Intent i13 = new Intent(ListViewImagesActivity.this,
AndroidGridLayoutActivity13.class);
startActivity(i13);
break;
case 13:
Intent i14 = new Intent(ListViewImagesActivity.this,
AndroidGridLayoutActivity14.class);
startActivity(i14);
break;
case 14:
Intent i15 = new Intent(ListViewImagesActivity.this,
AndroidGridLayoutActivity15.class);
startActivity(i15);
break;
}
// ending.........
}
});
}
// ...............................
public ArrayList<ItemDetails> GetSearchResults3() {
// TODO Auto-generated method stub
ArrayList<ItemDetails> results = new ArrayList<ItemDetails>();
ItemDetails item_details = new ItemDetails();
item_details.setName("ANGRY");
item_details.setImageNumber(1);
results.add(item_details);
item_details = new ItemDetails();
item_details.setName("NEUTRAL");
item_details.setImageNumber(2);
results.add(item_details);
item_details = new ItemDetails();
item_details.setName("FEMALE");
item_details.setImageNumber(3);
results.add(item_details);
item_details = new ItemDetails();
item_details.setName("MISC");
item_details.setImageNumber(4);
results.add(item_details);
item_details = new ItemDetails();
item_details.setName("NOTOK");
item_details.setImageNumber(5);
results.add(item_details);
item_details = new ItemDetails();
item_details.setName("PANEL");
item_details.setImageNumber(6);
results.add(item_details);
item_details = new ItemDetails();
item_details.setName("PLEASURE");
item_details.setImageNumber(7);
results.add(item_details);
item_details = new ItemDetails();
item_details.setName("RAGE");
item_details.setImageNumber(8);
results.add(item_details);
item_details = new ItemDetails();
item_details.setName("SAD");
item_details.setImageNumber(9);
results.add(item_details);
item_details = new ItemDetails();
item_details.setName("STUPIDITY");
item_details.setImageNumber(10);
results.add(item_details);
item_details = new ItemDetails();
item_details.setName("SURPRISED ");
item_details.setImageNumber(11);
results.add(item_details);
item_details = new ItemDetails();
item_details.setName("TREES");
item_details.setImageNumber(12);
results.add(item_details);
item_details = new ItemDetails();
item_details.setName("VICTORIOUS");
item_details.setImageNumber(13);
results.add(item_details);
item_details = new ItemDetails();
item_details.setName("LUCKY BEAR");
item_details.setImageNumber(14);
results.add(item_details);
item_details = new ItemDetails();
item_details.setName("LUCKY CHARM");
item_details.setImageNumber(15);
results.add(item_details);
return results;
}
}
Adapter Class...
public class ItemListBaseAdapter extends BaseAdapter {
private static ArrayList<ItemDetails> itemDetailsrrayList;
private Integer[] imgid;
public static ArrayList<ItemDetails> results;
private LayoutInflater l_Inflater;
public ItemListBaseAdapter(Context context, ArrayList<ItemDetails> results,
Integer[] imgid) {
itemDetailsrrayList = results;
l_Inflater = LayoutInflater.from(context);
this.imgid = imgid;
}
public int getCount() {
return itemDetailsrrayList.size();
}
public Object getItem(int position) {
return itemDetailsrrayList.get(position);
}
public long getItemId(int position) {
return position;
}
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
ImageView imageView = null;
if (convertView == null) {
convertView = l_Inflater.inflate(R.layout.category, null);
holder = new ViewHolder();
holder.txt_itemName = (TextView) convertView.findViewById(R.id.name);
holder.itemImage = (ImageView) convertView.findViewById(R.id.photo);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
holder.txt_itemName.setText(itemDetailsrrayList.get(position).getName());
holder.itemImage.setImageResource(imgid[itemDetailsrrayList.get(
position).getImageNumber() - 1]);
return convertView;
}
static class ViewHolder {
TextView txt_itemName;
ImageView itemImage;
}
}
XML ListView here......
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/rel1"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#ffffff" >
<RelativeLayout
android:id="@+id/navi_b"
android:layout_width="fill_parent"
android:layout_height="65dp"
android:layout_alignParentTop="true"
android:background="@drawable/navigation" >
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:textColor="#000000"
android:text="Albums"
android:textAppearance="?android:attr/textAppearanceLarge" />
</RelativeLayout>
<RelativeLayout
android:id="@+id/navi_l"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_above="@+id/navigation1"
android:layout_below="@+id/navi_b"
android:background="@drawable/bg">"
<ListView
android:id="@+id/listV_main"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_below="@+id/navi_b"
android:layout_above="@+id/navigation1"
android:layout_alignParentBottom="true" >
</ListView>
</RelativeLayout>
<RelativeLayout
android:id="@+id/navigation1"
android:layout_width="fill_parent"
android:layout_height="60dp"
android:layout_alignParentBottom="true"
android:background="#ffffff" >
<include
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
layout="@layout/tabb" />
</RelativeLayout>
</RelativeLayout>
答案 2 :(得分：1)
您的问题是，您将作为参数发送到函数setText，一个数字（int）而不是String。因此，而不是：
holder.text2.setText(words.indexOf(position));
试试这个：
holder.text2.setText("" + words.indexOf(position));
祝你好运！