我有一个ListView，每行都有一个ImageView，一个TextView和另一个ImageView。
下面的代码是我的ListView行的xml：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="60dp"
android:background="#FFF">
<ImageView
android:id="@+id/left"
android:layout_width="50dp"
android:layout_height="50dp"
android:layout_gravity="center"
android:src="@drawable/ic_default"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp" />
<TextView
android:id="@+id/text"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:gravity="center"
android:layout_weight="1"
android:textSize="16sp" />
<ImageView
android:id="@+id/right"
android:layout_width="50dp"
android:layout_height="match_parent"
android:layout_gravity="center"
android:src="@drawable/ic_cena_play"
android:layout_marginRight="0dp"
android:layout_marginLeft="10dp"
android:clickable="true"
android:background="@drawable/mybuttonplay" />
</LinearLayout>
我有一个ArrayList＆lt;字符串＆gt;使用Drawables的名称，我想放在行的第一个ImageView中。我想将ImageViews源“ic_default”更改为在ArrayList中具有名称的源名称。
在我的Activity中，在onCreate（）中，我正在使用一个Adapter，如下面的代码所示：
ArrayList<String> items = new ArrayList();
items.add("Star");
items.add("Moon");
items.add("Dog");
items.add("Bird");
items.add("Tree");
ArrayList<String> itemsimg = new ArrayList();
itemsimg.add("ic_star");
itemsimg.add("ic_moon");
itemsimg.add("ic_dog");
itemsimg.add("ic_bird");
itemsimg.add("ic_tree");
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, R.layout.scenesrow, R.id.text, items) {
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View row = super.getView(position, convertView, parent);
ImageView left = (ImageView) row.findViewById(R.id.left);
//here I want to change the resource
//Like if I had a function called getRosourceId(). DOES IT EXIST?!
int x = getResourceId( itemsimg.get(position) );
left.setImageResource(x);
View right = row.findViewById(R.id.right);
right.setTag(position);
right.setOnClickListener(ScenesActivity.this);
return row;
}
};
更新
谢谢你的回答！现在我可以改变ImageView源的语音（但尚未从ArrayList＆lt; String＆gt;）。之前没有setImageResource（）方法，因为我有一个View。随着你对所有人的建议施展到ImageView，大部分问题都没问题。但答案并没有涵盖“资源名称”的恐怖之处。
现在的最后一个问题是left.setImageResource（resId）;方法从Resource请求一个ID，我有一个String。怎么做？
抱歉，其他代码版本有一些错误。现在它已修复。我认为现在最后一个问题很清楚了。
答案 0 :(得分：13)
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, R.layout.scenesrow, R.id.text, items) {
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View row = super.getView(position, convertView, parent);
ImageView left = (ImageView)row.findViewById(R.id.left);
left.setOnClickListener(ScenesActivity.this);
ImageView right = (ImageView)row.findViewById(R.id.right);
right.setTag(position);
right.setImageResource(itemsimg.get(position));
left.setImageResource(itemsimg.get(position));
right.setOnClickListener(ScenesActivity.this);
return row;
}
使用以下内容更改itemsimg：
ArrayList<Integer> itemsimg = new ArrayList<Integer>();
itemsimg.add(R.drawable.ic_star);
itemsimg.add(R.drawable.ic_moon);
itemsimg.add(R.drawable.ic_dog);
itemsimg.add(R.drawable.ic_bird);
itemsimg.add(R.drawable.ic_tree);
使用String获取drawableId可以执行此操作：
Context context = imageView.getContext();
int id = context.getResources().getIdentifier("ic_tree", "drawable", context.getPackageName());
imageView.setImageResource(id);
效率不高，但它可以查找偶尔的资源。
答案 1 :(得分：3)
试试这个::
right.setImageResource(R.drawable.addphoto);/*select a picture from drawable*/
左边同样
left.setImageResource(R.drawable.addphoto);/*select a picture from drawable*/
讨论后
ArrayList<String> items = new ArrayList();
items.add("ic_star");
items.add("ic_moon");
items.add("ic_dog");
items.add("ic_bird");
items.add("ic_tree");
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, R.layout.scenesrow, R.id.text, items) {
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View row = super.getView(position, convertView, parent);
/*View : not required to declare everytimes*/
ImageView left = row.findViewById(R.id.left);
left.setOnClickListener(ScenesActivity.this);
ImageView right = row.findViewById(R.id.right);
right.setTag(position);
right.setOnClickListener(ScenesActivity.this);
right.setImageResource(R.drawable.addphoto);/*select a picture from drawable*/
left.setImageResource(R.drawable.addphoto);/*select a picture from drawable*/
return row;
}
};
答案 2 :(得分：2)
替换你的代码：
ArrayList<String> items = new ArrayList();
items.add("ic_star");
items.add("ic_moon");
items.add("ic_dog");
items.add("ic_bird");
items.add("ic_tree");
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, R.layout.scenesrow, R.id.text, items) {
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View row = super.getView(position, convertView, parent);
ImageView left = (ImageView) row.findViewById(R.id.left);
left.setOnClickListener(ScenesActivity.this);
left.setImageResource(R.drawable.leftphoto);
ImageView right = (ImageView) row.findViewById(R.id.right);
right.setTag(position);
right.setOnClickListener(ScenesActivity.this);
right.setImageResource(R.drawable.rightphoto);
return row;
}
};
答案 3 :(得分：0)
另一种简单而有条理的方法：
1）在 drawable 文件夹中添加资源，假设（ic_home，ic_launcher，ic_logout）//可以添加任意数量的图像
2）在values文件夹中的 strings.xml 中添加这些名称以及将在图像旁边显示的名称。它看起来像这样......
<!-- Drawer List Items -->
<string-array name="nav_drawer_items">
<item>Home</item>
<item>Add Category</item>
<item>Logout</item>
</string-array>
<string-array name="nav_drawer_icons">
<item>ic_home</item>
<item>ic_addcategory</item>
<item>ic_logout</item>
</string-array>
3）现在创建一个pojo（getter / setter）类，它将在对象中保存图标文本和图标id。像这样......
public class DrawerItems {
private String icnName;
private int icnId;
/**
* @return the icnName
*/
public String getIcnName() {
return icnName;
}
/**
* @param icnName
* the icnName to set
*/
public void setIcnName(String icnName) {
this.icnName = icnName;
}
/**
* @return the imageid
*/
public int getIcnId() {
return icnId;
}
/**
* @param imageid
* the imageid to set
*/
public void setIcnId(int imageid) {
icnId = imageid;
}}
4）现在我们需要在将它提供给适配器之前填充它。我们可以这样做
private DrawerItems navigationDrawerItems;
private ArrayList<DrawerItems> dataObjects;
private String[] mDrawerListItems;
private String[] mDrawerIcons;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// to fetch the resources from the string files
mDrawerListItems = getResources().getStringArray(
R.array.nav_drawer_items);
mDrawerIcons = getResources().getStringArray(R.array.nav_drawer_items);
// drawerListAdapter = new DrawerListAdapter(this, mDrawerListItems);
dataObjects = new ArrayList<DrawerItems>();
for (int i = 0; i < mDrawerListItems.length; i++) {
navigationDrawerItems = new DrawerItems();
navigationDrawerItems.setIcnName(mDrawerListItems[i]);
navigationDrawerItems.setIcnId(getResources().getIdentifier(
mDrawerIcons[i], "drawable", this.getPackageName()));
dataObjects.add(navigationDrawerItems);
}
drawerListAdapter = new DrawerListAdapter(this,
R.layout.list_drawer_row_item, dataObjects);//add name of your layout
}
5）现在在适配器中你可以这样实现它
public class DrawerListAdapter extends ArrayAdapter {
private Context mContext;
private ArrayList<DrawerItems> mDataObjects;
private int layout;
public DrawerListAdapter(Context context, int resource,
ArrayList<DrawerItems> dataObjects) {
super(context, resource, dataObjects);
mContext = context;
mDataObjects = dataObjects;
layout = resource;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder = null;
if (convertView == null) {
holder = new ViewHolder();
LayoutInflater inflater = (LayoutInflater) mContext
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(layout, parent,
false);
holder.txtDrawerListItem = (TextView) convertView
.findViewById(R.id.txt_drawer_item_name);
holder.imgDrawerListIcon = (ImageView) convertView
.findViewById(R.id.img_drawer_item_icon);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
final DrawerItems dataObj = mDataObjects.get(position);
holder.txtDrawerListItem.setText(dataObj.getIcnName());
holder.imgDrawerListIcon.setImageResource(dataObj.getIcnId());
return convertView;
}
public static class ViewHolder {
TextView txtDrawerListItem;
ImageView imgDrawerListIcon;
}
}
6）你已经完成了......确保你已经初始化了视图和常见的东西