XListView多條目載入沒有上拉,下拉
阿新 • • 發佈：2018-12-14
activity_main
<com.bwie.xlistview.XListView
android:id="@+id/lv_news"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="10dp">
</com.bwie.xlistview.XListView>
第一條目佈局item_news1
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical"> <TextView android:id="@+id/text_login" android:layout_width="match_parent" android:layout_height="wrap_content" /> <ImageView android:id="@+id/img_logo" android:layout_width="wrap_content" android:layout_height="wrap_content" /> </LinearLayout>
第二條目佈局item_news2
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical"> <TextView android:id="@+id/text_login" android:layout_width="match_parent" android:layout_height="wrap_content" /> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal"> <ImageView android:id="@+id/img_logo1" android:layout_width="wrap_content" android:layout_height="wrap_content" /> <ImageView android:id="@+id/img_logo2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="10dp"/> </LinearLayout> </LinearLayout>
第三條目佈局item_news3
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical"> <TextView android:id="@+id/text_login" android:layout_width="match_parent" android:layout_height="wrap_content" /> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal"> <ImageView android:id="@+id/img_logo1" android:layout_width="wrap_content" android:layout_height="wrap_content" /> <ImageView android:id="@+id/img_logo2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="10dp"/> <ImageView android:id="@+id/img_logo3" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="10dp"/> </LinearLayout> </LinearLayout>
MainActivity
package wanghuiqi.bawie.com.xlistview_1011;
import android.annotation.SuppressLint; import android.os.AsyncTask; import android.support.v7.app.AppCompatActivity; import android.os.Bundle;
import com.bwie.xlistview.XListView; import com.google.gson.Gson;
import java.util.ArrayList; import java.util.List;
public class MainActivity extends AppCompatActivity {
private List<News.DataBean> list;
@SuppressLint("StaticFieldLeak")
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//找控制元件
XListView lvnews=findViewById(R.id.lv_news);
list = new ArrayList<>();
//介面卡
final NewsAdapter newsAdapter=new NewsAdapter(this, list);
lvnews.setAdapter(newsAdapter);
new AsyncTask<String,Integer,String>(){
@Override
protected String doInBackground(String... strings) {
return HttpUtils.getStringFromHttp(strings[0]);
}
@Override
protected void onPostExecute(String s) {
super.onPostExecute(s);
Gson gson = new Gson();
News news = gson.fromJson(s, News.class);
list.clear();
list.addAll(news.getData());
newsAdapter.notifyDataSetChanged();
}
}.execute("http://www.xieast.com/api/news/news.php?page=1");
}
}
HttpUtils
package wanghuiqi.bawie.com.xlistview_1011;
import java.io.ByteArrayOutputStream; import java.io.IOException; import java.io.InputStream; import java.net.HttpURLConnection; import java.net.MalformedURLException; import java.net.URL; import java.net.URLConnection;
class HttpUtils {
private static String result="";
public static String getStringFromHttp(String urlString) {
try {
URL url = new URL(urlString);
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setRequestMethod("GET");
connection.setUseCaches(false);
connection.setConnectTimeout(5000);
if (connection.getResponseCode()==200){
InputStream is = connection.getInputStream();
result=getStringFromInputStream(is);
}
} catch (Exception e) {
e.printStackTrace();
}
return result;
}
private static String getStringFromInputStream(InputStream is) throws IOException {
ByteArrayOutputStream boas = new ByteArrayOutputStream();
byte[] buffer = new byte[1024];
int len=-1;
while ((len=is.read(buffer,0,buffer.length))!=-1){
boas.write(buffer,0,len);
boas.flush();
}
result=boas.toString();
boas.close();
is.close();
return result;
}
}
MyAppImg
package wanghuiqi.bawie.com.xlistview_1011;
import android.app.Application;
import com.nostra13.universalimageloader.core.ImageLoader; import com.nostra13.universalimageloader.core.ImageLoaderConfiguration;
public class MyAppImg extends Application {
@Override
public void onCreate() {
super.onCreate();
ImageLoaderConfiguration build = new ImageLoaderConfiguration.Builder(this).build();
ImageLoader.getInstance().init(build);
}
}
NewsAdapter
package wanghuiqi.bawie.com.xlistview_1011;
import android.content.Context; import android.text.TextUtils; import android.view.View; import android.view.ViewGroup; import android.widget.BaseAdapter; import android.widget.ImageView; import android.widget.TextView;
import com.nostra13.universalimageloader.core.ImageLoader;
import java.util.List;
public class NewsAdapter extends BaseAdapter { private Context context; private List<News.DataBean>list; private static final int TYPE_ONE_PIC=0; private static final int TYPE_TWO_PIC=1; private static final int TYPE_THREE_PIC=2;
public NewsAdapter(Context context, List<News.DataBean> list) {
this.context = context;
this.list = list;
}
@Override
public int getCount() {
return list.size();
}
@Override
public Object getItem(int position) {
return list.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public int getViewTypeCount() {
return 3;
}
@Override
public int getItemViewType(int position) {
News.DataBean bean = list.get(position);
if (!TextUtils.isEmpty(bean.getThumbnail_pic_s())){
return 2;
}else if(!TextUtils.isEmpty(bean.getThumbnail_pic_s02())){
return 1;
}else{
return 0;
}
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
Viewholder1 holder1;
Viewholder2 holder2;
Viewholder3 holder3;
int type = getItemViewType(position);
switch (type){
case 0:
if (convertView==null){
convertView=View.inflate(context,R.layout.item_news1,null);
holder1=new Viewholder1();
holder1.textLogin=convertView.findViewById(R.id.text_login);
holder1.imgLogo=convertView.findViewById(R.id.img_logo);
convertView.setTag(holder1);
}else{
holder1= (Viewholder1) convertView.getTag();
}
holder1.textLogin.setText(list.get(position).getTitle());
ImageLoader.getInstance().displayImage(list.get(position).getThumbnail_pic_s(),holder1.imgLogo);
break;
case 1:
if (convertView==null){
holder2=new Viewholder2();
convertView=View.inflate(context,R.layout.item_news2,null);
holder2.textLogin=convertView.findViewById(R.id.text_login);
holder2.imgLogo1=convertView.findViewById(R.id.img_logo1);
holder2.imgLogo2=convertView.findViewById(R.id.img_logo2);
convertView.setTag(holder2);
}else{
holder2= (Viewholder2) convertView.getTag();
}
holder2.textLogin.setText(list.get(position).getTitle());
ImageLoader.getInstance().displayImage(list.get(position).getThumbnail_pic_s(),holder2.imgLogo1);
ImageLoader.getInstance().displayImage(list.get(position).getThumbnail_pic_s02(),holder2.imgLogo2);
break;
case 2:
if (convertView==null){
holder3=new Viewholder3();
convertView=View.inflate(context,R.layout.item_news3,null);
holder3.textLogin=convertView.findViewById(R.id.text_login);
holder3.imgLogo1=convertView.findViewById(R.id.img_logo1);
holder3.imgLogo2=convertView.findViewById(R.id.img_logo2);
holder3.imgLogo3=convertView.findViewById(R.id.img_logo3);
convertView.setTag(holder3);
}else{
holder3= (Viewholder3) convertView.getTag();
}
holder3.textLogin.setText(list.get(position).getTitle());
ImageLoader.getInstance().displayImage(list.get(position).getThumbnail_pic_s(),holder3.imgLogo1);
ImageLoader.getInstance().displayImage(list.get(position).getThumbnail_pic_s02(),holder3.imgLogo2);
ImageLoader.getInstance().displayImage(list.get(position).getThumbnail_pic_s03(),holder3.imgLogo3);
break;
}
return convertView;
}
class Viewholder1{
TextView textLogin;
ImageView imgLogo;
}
class Viewholder2{
TextView textLogin;
ImageView imgLogo1;
ImageView imgLogo2;
}
class Viewholder3{
TextView textLogin;
ImageView imgLogo1;
ImageView imgLogo2;
ImageView imgLogo3;
}
}