直接上我的代码，我用了两个线程，一个用于接收网络数据，一个用于接收图片，然后放到列表中，可是好像计算错误，要不就是不显示，就算显示也是错误的。下面是我的代码
public class FragmentMainchatnews extends Fragment {
private Button button;
private ImageView imageView;
private Bitmap bitmap;
private String urlString;
Handler handler1;
@Override
public void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
}
public View onCreateView(LayoutInflater inflater,
@Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.main_chat_news, null);
Thread thread=new Thread(runnable);
thread.start();
return view;
}
//创建Hander对象,用于接收子线程接收到的数据
Handler handler = new Handler() {
List<Map<String, Object>> listItemx = new ArrayList<Map<String, Object>>();
public void handleMessage(android.os.Message msg) {
if (msg.arg1 == 0X456) {
listItemx= (List<Map<String, Object>>) msg.obj;
// 创建一个SimpleAdapter实现界面的更新
SimpleAdapter simpleAdapter = new SimpleAdapter(getActivity(), listItemx, R.layout.news_simple_item,
new String[]{"image", "title", "abs"},
new int[]{R.id.image, R.id.title, R.id.abs});
simpleAdapter.setViewBinder(new SimpleAdapter.ViewBinder() {
@Override
public boolean setViewValue(View view, Object data,
String textRepresentation) {
// TODO Auto-generated method stub
if ((view instanceof ImageView) && (data instanceof Bitmap)) {
ImageView i = (ImageView) view;
i.setImageBitmap((Bitmap) data);
Log.i("我是", "二蛋");
return true;
}
Log.i("我是", "sadasd");
return false;
}
});
ListView list = (ListView) getView().findViewById(R.id.chat_news);
// 为ListView设置Adapter
list.setAdapter(simpleAdapter);
//动态更新ListView
simpleAdapter.notifyDataSetChanged();
}
}
;
};
//开启子线程得到数据
Runnable runnable= new Runnable() {
public void run() {
final Message message = handler.obtainMessage();
Parameters para = new Parameters();
Log.i("尼玛","1");
para.put("keyword", "娱乐");
para.put("page","3");
ApiStoreSDK.execute("http://apis.baidu.com/songshuxiansheng/real_time/search_news",
ApiStoreSDK.GET,
para,
new ApiCallBack() {
@Override
public void onSuccess(int status, String responseString) {
Log.i("连接状态", "连接成功");
try {
JSONObject dataJson=new JSONObject(responseString);
JSONObject retData=dataJson.getJSONObject("retData");
JSONArray data=retData.getJSONArray("data");
int return_count=retData.getInt("return_count");
// 创建一个List集合，List集合的元素是Map
List<Map<String, Object>> listItems = new ArrayList<Map<String, Object>>();
for (int i = 0; i < return_count; i++) {
JSONObject info = data.getJSONObject(i);
Map<String, Object> listItem = new HashMap<String, Object>();
urlString=info.getString("img_url");
Thread thread1=new Thread(runnable1);
thread1.start();
//创建Hander对象,用于接收子线程的图片
handler1 = new Handler() {
public void handleMessage(android.os.Message msg) {
if (msg.arg1 == 0X123) {
Log.i("我爱","你");
bitmap=(Bitmap) msg.obj;
}
}
};
listItem.put("title", info.getString("title"));
listItem.put("image",bitmap);
listItem.put("abs", info.getString("abstract"));
listItems.add(listItem);
}
message.obj = listItems;
//定义标识子线程
message.arg1 = 0X456;
handler.sendMessage(message);
} catch (JSONException e) {
Log.i("获取到数据：", responseString);
}
}
@Override
public void onComplete() {
Log.i("sdkdemo", "onComplete");
}
@Override
public void onError(int status, String responseString, Exception e) {
Log.i("sdkdemo", "onError, status: " + status);
Log.i("sdkdemo", "errMsg: " + (e == null ? "" : e.getMessage()));
}
});
}
};
//开启另子线程得到图片
Runnable runnable1= new Runnable() {
public void run() {
final Message message = handler.obtainMessage();
//获取网络图片
URL url;
try {
url = new URL(urlString);
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setConnectTimeout(6000);
connection.setDoInput(true);
connection.setUseCaches(true);
InputStream is = connection.getInputStream();
bitmap = BitmapFactory.decodeStream(is);
is.close();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
message.obj = bitmap;
//定义标识子线程
message.arg1 =0X123;
handler1.sendMessage(message);
}
};
这很明显使你的listview中图片在刷新的时候，复用了前一张图片，导致图片每次会错位，建议你用settag方法把view复用
listview中图片在刷新的时候，复用了前一张图片，导致图片每次会错位，建议你用settag方法把view复用，这应该能解决你的问题
if ((view instanceof ImageView) && (data instanceof Bitmap)) {
for(int i=0;i<return_count;i++) {
view.setTag(i);
ImageView vi = (ImageView) view.getTag(i);
vi.setImageBitmap((Bitmap) data);
}
我这样改对吗