标签：lists type let disk lse index messages 长度 puts
public class Second extends Activity{
private int pageIndex=1;
private int operType=1;
private String myurl="http://365jia.cn/news/api3/365jia/news/headline?page="+pageIndex;
private List<String> imgUrls=new ArrayList<>();
private List<Urse.DataBeanX.DataBean> datas=new ArrayList<>();
private PullToRefreshScrollView psv;
private ListView listView;
private ViewPager vp;
private LinearLayout linPoint;
private ListViewAdapter adapter;
private List<ImageView> lists=new ArrayList<>();
@SuppressLint("HandlerLeak")
private Handler mhandler =new Handler(){
@Override
public void handleMessage(Message msg) {
super.handleMessage(msg);
int cIndex = vp.getCurrentItem();
cIndex++;
vp.setCurrentItem(cIndex);
setSelectedPoint(cIndex%lists.size());
sendEmptyMessageDelayed(0,1000);
}
};
@Override
public void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main2);
psv = findViewById(R.id.psv);
listView = findViewById(R.id.lv);
vp = findViewById(R.id.vp);
linPoint = findViewById(R.id.lin_point);
//初始化
initPsv();
//请求数据
recreatData();
}
private void recreatData() {
new MyTask().execute(myurl);
}
public void setSelectedPoint(int pageIndex) {
for (int i = 0; i <lists.size() ; i++) {
if (i==pageIndex){
lists.get(i).setImageResource(R.drawable.point_selected);
}else {
lists.get(i).setImageResource(R.drawable.point_unselected);
}
}
}
private class MyTask extends AsyncTask<String, Void, String> {
//在后台执行的任务
@Override
protected String doInBackground(String... strings) {//String... 可变长的字符串 string类型的数组，长度不固定
try {
URL url = new URL(strings[0]);
HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
InputStream inputStream = urlConnection.getInputStream();
String s = streamToString(inputStream);
return s;
} catch (Exception e) {
e.printStackTrace();
}
return "123";
}
//在doInBackground之后，调用的方法，，，更新UI的操作，相当于handlerMessage中的功能
@Override
protected void onPostExecute(String s) {
super.onPostExecute(s);
//解析+展示
Gson gson = new Gson();
Urse urse = gson.fromJson(s, Urse.class);
List<Urse.DataBeanX.DataBean> data = urse.getData().getData();
showPics(data);
if (operType == 1) {
datas.clear();
}
datas.addAll(data);
setAdapter();
psv.onRefreshComplete();
}
}
private void showPics(List<Urse.DataBeanX.DataBean> data) {
imgUrls.clear();
imgUrls.add("http://365jia.cn/uploads/"+data.get(0).getPics().get(0));
imgUrls.add("http://365jia.cn/uploads/"+data.get(1).getPics().get(0));
imgUrls.add("http://365jia.cn/uploads/"+data.get(2).getPics().get(0));
MyAdapter adapter = new MyAdapter(imgUrls,Second.this);
vp.setAdapter(adapter);
initPoint();
//Handler发消息
mhandler.sendEmptyMessageDelayed(0,1000);
}
private void initPoint() {
linPoint.removeAllViews();
lists.clear();
for (int i = 0; i <imgUrls.size() ; i++) {
ImageView imageView = new ImageView(this);
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT);
params.setMargins(0,0,10,0);
if (i==0){
imageView.setImageResource(R.drawable.point_selected);
}else {
imageView.setImageResource(R.drawable.point_unselected);
}
linPoint.addView(imageView,params);
lists.add(imageView);
}
}
private void setAdapter() {
if (adapter==null) {
adapter = new ListViewAdapter(datas,Second.this);
listView.setAdapter(adapter);
}else {
adapter.notifyDataSetChanged();
}
}
private String streamToString(InputStream stream) {
StringBuilder builder = new StringBuilder();
String str;
BufferedReader reader = new BufferedReader(new InputStreamReader(stream));
try {
while ((str=reader.readLine())!=null){
builder.append(str);
Log.i("jljs", builder.toString());
}
} catch (IOException e) {
e.printStackTrace();
}
return builder.toString();
}
private void initPsv() {
psv.setMode(PullToRefreshBase.Mode.BOTH);
psv.setOnRefreshListener(new PullToRefreshBase.OnRefreshListener2<ScrollView>() {
@Override
public void onPullDownToRefresh(PullToRefreshBase<ScrollView> pullToRefreshBase) {
//刷新回调
operType=1;
pageIndex=1;
myurl="http://365jia.cn/news/api3/365jia/news/headline?page="+pageIndex;
mhandler.removeCallbacksAndMessages(null);
recreatData();
}
@Override
public void onPullUpToRefresh(PullToRefreshBase<ScrollView> pullToRefreshBase) {
//加载回调
operType=2;
pageIndex++;
myurl="http://365jia.cn/news/api3/365jia/news/headline?page="+pageIndex;
mhandler.removeCallbacksAndMessages(null);
recreatData();
}
});
}
}
class MyAdapter extends PagerAdapter {
//数据源
private List<String> urls;
//上下文对象
private Context context;
private DisplayImageOptions options;
public MyAdapter(List<String> urls, Context context) {
this.urls = urls;
this.context = context;
this.options=new DisplayImageOptions.Builder()
.cacheInMemory(true)//使用内存缓存
.cacheOnDisk(true)//使用磁盘缓存
.showImageOnLoading(R.mipmap.ic_launcher)//设置正在下载的图片
.showImageForEmptyUri(R.mipmap.ic_launcher)//url为空或请求的资源不存在时
.showImageOnFail(R.mipmap.ic_launcher)//下载失败时显示的图片
.bitmapConfig(Bitmap.Config.RGB_565)//设置图片色彩模式 1px=2个字节 ARGB_8888 1px=4个字节 ARGB_4444 1px=2个字节 ALPHA_8 1px=1个字节
.imageScaleType(ImageScaleType.EXACTLY)//设置图片的缩放模式
.build();
}
@Override
public int getCount() {
return Integer.MAX_VALUE;
}
@Override
public boolean isViewFromObject(View view, Object object) {
return view==object;
}
@Override
public Object instantiateItem(ViewGroup container, int position) {
ImageView imageView=new ImageView(context);
//下载图片
ImageLoader.getInstance().displayImage(urls.get(position%urls.size()),imageView,options);
container.addView(imageView);
return imageView;
}
@Override
public void destroyItem(ViewGroup container, int position, Object object) {
//super.destroyItem(container, position, object);
container.removeView((View)object);
}
}
class ListViewAdapter extends BaseAdapter {
private List<Urse.DataBeanX.DataBean> data;
private Context context;
private final DisplayImageOptions options;
public ListViewAdapter( List<Urse.DataBeanX.DataBean> data, Context context) {
this.data = data;
this.context = context;
options = new DisplayImageOptions.Builder()
.cacheInMemory(true)//使用内存缓存
.cacheOnDisk(true)//使用磁盘缓存
.showImageOnLoading(R.mipmap.ic_launcher)//设置正在下载的图片
.showImageForEmptyUri(R.mipmap.ic_launcher)//url为空或请求的资源不存在时
.showImageOnFail(R.mipmap.ic_launcher)//下载失败时显示的图片
.bitmapConfig(Bitmap.Config.RGB_565)//设置图片色彩模式 1px=2个字节 ARGB_8888 1px=4个字节 ARGB_4444 1px=2个字节 ALPHA_8 1px=1个字节
.imageScaleType(ImageScaleType.EXACTLY)//设置图片的缩放模式
.build();
}
@Override
public int getCount() {
return data.size();
}
@Override
public Object getItem(int i) {
return data.get(i);
}
@Override
public long getItemId(int i) {
return i;
}
@Override
public View getView(int i, View view, ViewGroup viewGroup) {
ViewHolder holder;
if(view==null){
view=View.inflate(context,R.layout.item,null);
holder=new ViewHolder();
holder.textView=view.findViewById(R.id.tv1);
holder.img1=view.findViewById(R.id.img1);
view.setTag(holder);
}else {
holder= (ViewHolder) view.getTag();
}
holder.textView.setText(data.get(i).getTitle());
ImageLoader.getInstance().displayImage("http://365jia.cn/uploads/"+data.get(i).getPics().get(0),holder.img1,options);
return view;
}
class ViewHolder{
TextView textView;
ImageView img1;
}
}
public class MyListView extends ListView{
public MyListView(Context context) {
super(context);
}
public MyListView(Context context, AttributeSet attrs) {
super(context, attrs);
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
int newHeight = MeasureSpec.makeMeasureSpec(Integer.MAX_VALUE >> 2, MeasureSpec.AT_MOST);
super.onMeasure(widthMeasureSpec, newHeight);
}
}
LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<com.handmark.pulltorefresh.library.PullToRefreshScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/psv">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<FrameLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<android.support.v4.view.ViewPager
android:layout_width="match_parent"
android:id="@+id/vp"
android:layout_height="200dp">
</android.support.v4.view.ViewPager>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/lin_point"
android:orientation="horizontal"
android:gravity="center"
android:layout_gravity="bottom"></LinearLayout>
</FrameLayout>
<com.example.week3_lianxi.MyListView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/lv"></com.example.week3_lianxi.MyListView>
>
</LinearLayout>
</com.handmark.pulltorefresh.library.PullToRefreshScrollView>
</LinearLayout>
标签：lists type let disk lse index messages 长度 puts
原文地址：https://www.cnblogs.com/xiaxinxin/p/8954950.html
