【框架】PullToRefresh下拉刷新上拉加载

<com.handmark.pulltorefresh.library.PullToRefreshListView
android:id="@+id/lv"
android:layout_width="match_parent"
android:layout_height="match_parent"></com.handmark.pulltorefresh.library.PullToRefreshListView>

public class OKHttpUtils {
private static OkHttpClient client = new OkHttpClient();

public static void getData(String urlStr, Callback callback) {
Request request = new Request.Builder().url(urlStr).build();
client.newCall(request).enqueue(callback);
}
}

public class MainActivity extends AppCompatActivity {

private List<String> list;
private PullToRefreshListView refreshListView;
private String urlStr = "http://m2.qiushibaike.com/article/list/text?page=%d";
private int pageCount = 1;
private ArrayAdapter<String> adapter;
private Handler mHandler = new Handler() {
@Override
public void handleMessage(Message msg) {
//设置刷新完毕，取消刷新动画
refreshListView.onRefreshComplete();
adapter.notifyDataSetChanged();
}
};
private Callback callback;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
list = new ArrayList<>();
refreshListView = (PullToRefreshListView) findViewById(R.id.lv);
TextView noDataTv = (TextView) findViewById(R.id.no_data_tv);
//当ListView中的数据为空时显示的控件
refreshListView.setEmptyView(noDataTv);
//        initData();
initNetData();

//设置既有下拉刷新，又有上拉加载，不设置，默认只有下拉刷新
refreshListView.setMode(PullToRefreshBase.Mode.BOTH);
refreshListView.setOnRefreshListener(new PullToRefreshBase.OnRefreshListener2<ListView>() {
//下拉刷新回调的方法
@Override
public void onPullDownToRefresh(PullToRefreshBase<ListView> refreshView) {
new Thread(new Runnable() {
@Override
public void run() {
SystemClock.sleep(3000);
mHandler.sendEmptyMessage(0);
}
}).start();
}

//上拉加载回调的方法
@Override
public void onPullUpToRefresh(PullToRefreshBase<ListView> refreshView) {
OKHttpUtils.getData(String.format(urlStr, ++pageCount), callback);
}
});

refreshListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
//position从1开始
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Toast.makeText(MainActivity.this, "position:" + position, Toast.LENGTH_SHORT).show();
}
});

ILoadingLayout loadingLayoutProxy = refreshListView.getLoadingLayoutProxy();
//提示用户松手刷新时的文本
loadingLayoutProxy.setReleaseLabel("释放时显示的文本");
//正在加载数据时显示的文本
loadingLayoutProxy.setRefreshingLabel("正在刷新时显示的文本");
//下拉时显示的文本
loadingLayoutProxy.setPullLabel("下拉时显示的文本");
//显示上次刷新时的文本，可以显示上次刷新时间
loadingLayoutProxy.setLastUpdatedLabel("显示上次刷新时的文本");
//获取一个bitmap对象
Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.mipmap.ic_launcher);
//设置刷新动画中的图片
loadingLayoutProxy.setLoadingDrawable(new BitmapDrawable(getResources(), bitmap));
//设置字体
loadingLayoutProxy.setTextTypeface(Typeface.createFromAsset(getAssets(), "mycustom.ttf"));

adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, list);
refreshListView.setAdapter(adapter);
}

/**
* 初始化网络数据
*/
private void initNetData() {
callback = new Callback() {
@Override
public void onFailure(Call call, IOException e) {

}

@Override
public void onResponse(Call call, Response response) throws IOException {
if (response.isSuccessful()) {
parseJson(response.body().string());
mHandler.sendEmptyMessage(0);
}
}
};
OKHttpUtils.getData(String.format(urlStr, pageCount), callback);
}

/**
* json解析
*
* @param string
*/
private void parseJson(String string) {
try {
JSONObject jo = new JSONObject(string);
JSONArray items = jo.getJSONArray("items");
for (int i = 0; i < items.length(); i++) {
String content = items.getJSONObject(i).getString("content");
list.add(content);
}
} catch (JSONException e) {
e.printStackTrace();
}
}

private void initData() {
list = new ArrayList<>();
for (int i = 0; i < 30; i++) {
list.add("lisi:" + i);
}
}
}