ListView动态加载
1.Activity代码：
private ListView mListView; private int mPageIndex = 1; private MyAdapter myAdapter; private ListmList = new ArrayList<>();
private View mFootView;
private Button mLoadMore;
private ProgressBar mPro;
private int mLastIndex;
private SwipeRefreshLayout mSwipe;
private Handler mHandler = new Handler() {
@Override
public void handleMessage(Message msg) {
String jsonStr = (String) msg.obj;
Gson gson = new Gson();
//反射???
MyData myData = gson.fromJson(jsonStr, MyData.class);
//给集合赋值
mList.addAll(myData.getParamz().getFeeds());
myAdapter.notifyDataSetChanged();
mSwipe.setRefreshing(false);
}
};
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initFootView();
initView();
getInfo();
}
private void initView() {
mSwipe = (SwipeRefreshLayout) findViewById(R.id.SwipeRefresh);
mListView = (ListView) findViewById(R.id.lv);
mListView.addFooterView(mFootView);
mListView.setOnScrollListener(this);
myAdapter = new MyAdapter(mList, this);
mListView.setAdapter(myAdapter);
}
//初始化底部视图
private void initFootView() {
mFootView = getLayoutInflater().inflate(R.layout.layout, null);
mLoadMore = (Button) mFootView.findViewById(R.id.Load_More_Btn);
mPro = (ProgressBar) mFootView.findViewById(R.id.progressBar2);
mLoadMore.setOnClickListener(this);
}
private void getInfo() {
new Thread(new Runnable() {
@Override
public void run() {
try {
String s = MyOkHttp.getMyOkHttp().sendGet("http://litchiapi.jstv.com/api/GetFeeds?column=3&PageSize=10&pageIndex=" + mPageIndex + "&val=100511D3BE5301280E0992C73A9DEC41");
Message msg = new Message();
msg.obj = s;
mHandler.sendMessage(msg);
} catch (IOException e) {
e.printStackTrace();
}
}
}).start();
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.Load_More_Btn:
mPro.setVisibility(View.VISIBLE);
mLoadMore.setVisibility(View.GONE);
mPageIndex++;
getInfo();
break;
}
}
//滑动状态监听
@Override
public void onScrollStateChanged(AbsListView view, int scrollState) {
if (scrollState == 0 && myAdapter.getCount() == mLastIndex) {
mPro.setVisibility(View.GONE);
mLoadMore.setVisibility(View.VISIBLE);
}
}
//滑动时走的方法
@Override
public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
mLastIndex = totalItemCount - 1;
}
}
2.Adapter（适配器）
public class MyAdapter extends BaseAdapter {
private ListmList;
private Context mContext;
public MyAdapter(ListmList, Context mContext) {
this.mList = mList;
this.mContext = mContext;
}
@Override
public int getCount() {
return mList.size();
}
@Override
public Object getItem(int position) {
return null;
}
@Override
public long getItemId(int position) {
return 0;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
Holder holder = null;
if (convertView == null) {
holder = new Holder();
convertView = LayoutInflater.from(mContext).inflate(R.layout.list_item, null);
holder.mText = (TextView) convertView.findViewById(R.id.ListView_Text);
convertView.setTag(holder);
} else {
holder = (Holder) convertView.getTag();
}
holder.mText.setText(mList.get(position).getData().getSubject() + "");
return convertView;
}
class Holder {
private TextView mText;
}
}
2.Adapter（适配器）代码：
public class MyAdapter extends BaseAdapter {
private ListmList;
private Context mContext;
public MyAdapter(ListmList, Context mContext) {
this.mList = mList;
this.mContext = mContext;
}
@Override
public int getCount() {
return mList.size();
}
@Override
public Object getItem(int position) {
return null;
}
@Override
public long getItemId(int position) {
return 0;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
Holder holder = null;
if (convertView == null) {
holder = new Holder();
convertView = LayoutInflater.from(mContext).inflate(R.layout.list_item, null);
holder.mText = (TextView) convertView.findViewById(R.id.ListView_Text);
convertView.setTag(holder);
} else {
holder = (Holder) convertView.getTag();
}
holder.mText.setText(mList.get(position).getData().getSubject() + "");
return convertView;
}
class Holder {
private TextView mText;
}
}
