从Android版的ListView的ImageView [英] Android ImageView from ListView
本文介绍了从Android版的ListView的ImageView的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我试图传递给KEY_THUMB_URL到SingleMenuItemActivity.class显示图像的onclick列表视图。我已标记的区域//不工作。请纠正我的编码，我是pretty新到Android。
CustomizedListView.class
公共类CustomizedListView延伸活动{
//所有静态变量
静态最终字符串URL =http://api.androidhive.info/music/music.xml;
// XML节点键
静态最后弦乐KEY_SONG =歌; //父节点
静态最后弦乐KEY_ID =ID;
静态最后弦乐KEY_TITLE =称号;
静态最后弦乐KEY_ARTIST =艺术家;
静态最后弦乐KEY_DURATION =时间;
静态最后弦乐KEY_THUMB_URL =thumb_url; ListView控件列表;
LazyAdapter适配器; @覆盖
公共无效的onCreate（捆绑savedInstanceState）{
super.onCreate（savedInstanceState）;
的setContentView（R.layout.main）;
ArrayList的＆LT;＆HashMap的LT;字符串，字符串＆GT;＆GT; songsList =新的ArrayList＆LT;＆HashMap的LT;字符串，字符串＆GT;＆GT;（）; XMLParser的解析器=新XMLParser的（）;
字符串XML = parser.getXmlFromUrl（URL）; // URL从XML获得
文档的文档= parser.getDomElement（XML）; //获得DOM元素 节点列表NL = doc.getElementsByTagName（KEY_SONG）;
//遍历所有歌曲节点＆LT循环;宋＆GT;
的for（int i = 0; I＆LT; nl.getLength（）;我++）{
//创建新的HashMap
HashMap的＆LT;字符串，字符串＆GT;地图=新的HashMap＆LT;字符串，字符串＆GT;（）;
元素e =（元）nl.item（I）
//将每个子节点的HashMap键=＆GT;值
map.put（KEY_ID，parser.getValue（即KEY_ID））;
map.put（KEY_TITLE，parser.getValue（即KEY_TITLE））;
map.put（KEY_ARTIST，parser.getValue（即KEY_ARTIST））;
map.put（KEY_DURATION，parser.getValue（即KEY_DURATION））;
map.put（KEY_THUMB_URL，parser.getValue（即KEY_THUMB_URL））; //添加HashList到ArrayList的
songsList.add（地图）;
}
名单=（ListView控件）findViewById（R.id.list）; //通过传递XML数据的ArrayList获取适配器
适配器=新LazyAdapter（这一点，songsList）;
list.setAdapter（适配器）;
// Click事件的单排列表
list.setOnItemClickListener（新OnItemClickListener（）{ @覆盖
公共无效onItemClick（适配器视图＆LT;＆GT;母公司，观景，
INT位置，长的id）{
字符串title =（（的TextView）view.findViewById（R.id.title））的getText（）的toString（）。
字符串描述=（（的TextView）view.findViewById（R.id.artist））的getText（）的toString（）。
//开始新意图
在意向=新意图（getApplicationContext（），SingleMenuItemActivity.class）; in.putExtra（KEY_TITLE，职称）;
in.putExtra（KEY_THUMB_URL，R.id.list_image）; //修改由Nandeesh如告诉
in.putExtra（KEY_ARTIST，说明）;
startActivity（在）; }
}）;
}
}
SingleMenuItemActivity.class
公共类SingleMenuItemActivity延伸活动{
静态最后弦乐KEY_TITLE =称号;
静态最后弦乐KEY_ARTIST =艺术家;
静态最后弦乐KEY_THUMB_URL =thumb_url; @覆盖
公共无效的onCreate（捆绑savedInstanceState）{
super.onCreate（savedInstanceState）;
的setContentView（R.layout.single_list_item）; 在意向= getIntent（）; 字符串title = in.getStringExtra（KEY_TITLE）;
字符串描述= in.getStringExtra（KEY_ARTIST）; // INT thumb_image = in.getIntExtra（KEY_THUMB_URL）; //错误：在类型意图的方法getIntExtra（字符串，INT）不适用的参数（字符串） TextView的lblName =（的TextView）findViewById（R.id.name_label）;
TextView的lblDesc =（的TextView）findViewById（R.id.description_label）; // ImageView的拇指=（ImageView的）findViewById（R.id.imageView1）; lblName.setText（职称）;
// thumb.setImageResource（thumb_image）; //修改由Nandeesh如告诉
lblDesc.setText（介绍）; }
}
LazyAdapter.class
公共类LazyAdapter延伸BaseAdapter { 私人活动活动;
私人的ArrayList＆LT;＆HashMap的LT;字符串，字符串＆GT;＆GT;数据;
私有静态LayoutInflater吹气= NULL;
公共ImageLoader的ImageLoader的; 公共LazyAdapter（活动一，ArrayList的＆LT;＆HashMap的LT;字符串，字符串＆GT; D 1和D）{
活性=一个;
数据= D;
吹气=（LayoutInflater）activity.getSystemService（Context.LAYOUT_INFLATER_SERVICE）;
ImageLoader的=新ImageLoader的（activity.getApplicationContext（））;
} 公众诠释的getCount（）{
返回data.size（）;
} 公共对象的getItem（INT位置）{
返回的位置;
} 众长getItemId（INT位置）{
返回的位置;
} 公共查看getView（INT位置，查看convertView，父母的ViewGroup）{
查看VI = convertView;
如果（convertView == NULL）
VI = inflater.inflate（R.layout.list_row，NULL）; TextView的标题=（TextView中）vi.findViewById（R.id.title）; //称号
TextView的艺术家=（TextView中）vi.findViewById（R.id.artist）; //歌手名
TextView的持续时间=（TextView中）vi.findViewById（R.id.duration）; //持续时间
ImageView的thumb_image =（ImageView的）vi.findViewById（R.id.list_image）; //拇指图像 HashMap的＆LT;字符串，字符串＆GT;歌=新的HashMap＆LT;字符串，字符串＆GT;（）;
曲= data.get（位置）; //设置列表视图中的所有值
title.setText（song.get（CustomizedListView.KEY_TITLE））;
artist.setText（song.get（CustomizedListView.KEY_ARTIST））;
duration.setText（song.get（CustomizedListView.KEY_DURATION））;
imageLoader.DisplayImage（song.get（CustomizedListView.KEY_THUMB_URL），thumb_image）;
返回VI;
}
}
解决方案
在此行
in.putExtra（KEY_THUMB_URL，R.id.list_image）;
R.id.list_image不是绘制。仅R.drawable []可用于setImageResource。
那么你不应该使用字符串thumb_image = in.getStringExtra（KEY_THUMB_URL）因为putextra正在添加整数，你试图得到一个字符串
您应该使用
INT thumb_image = in.getIntExtra（KEY_THUMB_URL）thumb.setImageResource（thumb_image）
I'm trying to pass KEY_THUMB_URL to SingleMenuItemActivity.class to show Image onclick listview. I have marked those area //Not Working . Please correct my codings, I'm pretty new to android.
CustomizedListView.class
public class CustomizedListView extends Activity { // All static variables static final String URL = "http://api.androidhive.info/music/music.xml"; // XML node keys static final String KEY_SONG = "song"; // parent node static final String KEY_ID = "id"; static final String KEY_TITLE = "title"; static final String KEY_ARTIST = "artist"; static final String KEY_DURATION = "duration"; static final String KEY_THUMB_URL = "thumb_url"; ListView list; LazyAdapter adapter; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); ArrayList<HashMap<String, String>> songsList = new ArrayList<HashMap<String, String>>(); XMLParser parser = new XMLParser(); String xml = parser.getXmlFromUrl(URL); // getting XML from URL Document doc = parser.getDomElement(xml); // getting DOM element NodeList nl = doc.getElementsByTagName(KEY_SONG); // looping through all song nodes <song> for (int i = 0; i < nl.getLength(); i++) { // creating new HashMap HashMap<String, String> map = new HashMap<String, String>(); Element e = (Element) nl.item(i); // adding each child node to HashMap key => value map.put(KEY_ID, parser.getValue(e, KEY_ID)); map.put(KEY_TITLE, parser.getValue(e, KEY_TITLE)); map.put(KEY_ARTIST, parser.getValue(e, KEY_ARTIST)); map.put(KEY_DURATION, parser.getValue(e, KEY_DURATION)); map.put(KEY_THUMB_URL, parser.getValue(e, KEY_THUMB_URL)); // adding HashList to ArrayList songsList.add(map); } list=(ListView)findViewById(R.id.list); // Getting adapter by passing xml data ArrayList adapter=new LazyAdapter(this, songsList); list.setAdapter(adapter); // Click event for single list row list.setOnItemClickListener(new OnItemClickListener() { @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { String title = ((TextView) view.findViewById(R.id.title)).getText().toString(); String description = ((TextView) view.findViewById(R.id.artist)).getText().toString(); // Starting new intent Intent in = new Intent(getApplicationContext(), SingleMenuItemActivity.class); in.putExtra(KEY_TITLE, title); in.putExtra(KEY_THUMB_URL, R.id.list_image); //Modified as told by Nandeesh in.putExtra(KEY_ARTIST, description); startActivity(in); } }); } }SingleMenuItemActivity.class
public class SingleMenuItemActivity extends Activity { static final String KEY_TITLE = "title"; static final String KEY_ARTIST = "artist"; static final String KEY_THUMB_URL = "thumb_url"; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.single_list_item); Intent in = getIntent(); String title = in.getStringExtra(KEY_TITLE); String description = in.getStringExtra(KEY_ARTIST); // int thumb_image = in.getIntExtra(KEY_THUMB_URL); // ERROR : The method getIntExtra(String, int) in the type Intent is not applicable for the arguments (String) TextView lblName = (TextView) findViewById(R.id.name_label); TextView lblDesc = (TextView) findViewById(R.id.description_label); // ImageView thumb = (ImageView) findViewById(R.id.imageView1); lblName.setText(title); // thumb.setImageResource(thumb_image); //modified as told by Nandeesh lblDesc.setText(description); } }LazyAdapter.class
public class LazyAdapter extends BaseAdapter { private Activity activity; private ArrayList<HashMap<String, String>> data; private static LayoutInflater inflater=null; public ImageLoader imageLoader; public LazyAdapter(Activity a, ArrayList<HashMap<String, String>> d) { activity = a; data=d; inflater = (LayoutInflater)activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE); imageLoader=new ImageLoader(activity.getApplicationContext()); } public int getCount() { return data.size(); } public Object getItem(int position) { return position; } public long getItemId(int position) { return position; } public View getView(int position, View convertView, ViewGroup parent) { View vi=convertView; if(convertView==null) vi = inflater.inflate(R.layout.list_row, null); TextView title = (TextView)vi.findViewById(R.id.title); // title TextView artist = (TextView)vi.findViewById(R.id.artist); // artist name TextView duration = (TextView)vi.findViewById(R.id.duration); // duration ImageView thumb_image=(ImageView)vi.findViewById(R.id.list_image); // thumb image HashMap<String, String> song = new HashMap<String, String>(); song = data.get(position); // Setting all values in listview title.setText(song.get(CustomizedListView.KEY_TITLE)); artist.setText(song.get(CustomizedListView.KEY_ARTIST)); duration.setText(song.get(CustomizedListView.KEY_DURATION)); imageLoader.DisplayImage(song.get(CustomizedListView.KEY_THUMB_URL), thumb_image); return vi; } }
解决方案In this line
in.putExtra(KEY_THUMB_URL, R.id.list_image);R.id.list_image is not a drawable. Only R.drawable.[ ] can be used to setImageResource.
Then you should not use
String thumb_image = in.getStringExtra(KEY_THUMB_URL)since putextra is adding a integer and you are trying to get a stringYou should use
int thumb_image = in.getIntExtra(KEY_THUMB_URL)thumb.setImageResource(thumb_image)
这篇关于从Android版的ListView的ImageView的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
查看全文
