微信API实例（OKHttp+PullToRefreshListView+WebView综合应用）

主页面xml:

<include layout="@layout/title_wechat"></include>
<com.handmark.pulltorefresh.library.PullToRefreshListView
android:id="@+id/pu_lv"
android:layout_width="match_parent"
app:ptrMode="both"
android:layout_height="match_parent">
</com.handmark.pulltorefresh.library.PullToRefreshListView>
**需要添加pulltorefresh依赖库**

详情页面xml:

<WebView
android:id="@+id/wv"
android:layout_width="match_parent"
android:layout_height="match_parent"></WebView>

自定义标题栏布局xml:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:background="#eb413d"
android:layout_height="50dp">
<TextView
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:text="WeChat新闻推送"
android:textColor="#fce6e6"
android:textSize="25sp"
android:layout_gravity="center"
android:gravity="center_vertical"/>

</LinearLayout>

MainAcvitity。Java

public class MainActivity extends AppCompatActivity {
private PullToRefreshListView pu_lv;
private List<WeChatNews> list;
public static final int  PAGE=1;
public static final int  LOADING=2;
private MyHandle handle=null;
public int page =1;
private WechatAdapter adapter=null;
private String url="http://api.tianapi.com/qiwen/?key=4bd737c35d23201f3f97b7eeb4f043d3&num=10&page=";
private String json=null;
private String url1;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
pu_lv= (PullToRefreshListView) findViewById(R.id.pu_lv);
url1 = url + String.valueOf(page);

pu_lv.setOnRefreshListener(new PullToRefreshBase.OnRefreshListener2<ListView>() {
@Override
public void onPullDownToRefresh(PullToRefreshBase<ListView> refreshView) {
page=1;
getData();
}

@Override
public void onPullUpToRefresh(PullToRefreshBase<ListView> refreshView) {
page+=1;
url1 = url + String.valueOf(page);
getData();
}
});

list=new ArrayList<>();
handle=new MyHandle();
getData();
adapter=new WechatAdapter(this,list);
adapter.notifyDataSetChanged();
pu_lv.setAdapter(adapter);
pu_lv.onRefreshComplete();
pu_lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
WeChatNews news=list.get(position-1);
String url=news.getUrl();
Intent intent=new Intent(view.getContext(),NewsActivity.class);
intent.putExtra("content",url);
startActivity(intent);
}
});

}
/**
* 获取数据
*/
private void getData(){
OkHttpClient client=new OkHttpClient();
Request request=new Request.Builder().url(url1).build();
client.newCall(request).enqueue(new Callback() {
@Override
public void onFailure(Call call, IOException e) {

}

@Override
public void onResponse(Call call, Response response) throws IOException {
final String str= response.body().string();
json=str;
runOnUiThread(new Runnable() {
@Override
public void run() {
if(page==1){
handle.sendMessage(handle.obtainMessage(PAGE,json));
}else {
handle.sendMessage(handle.obtainMessage(page,json));
}
Thread.interrupted();//中断线程，防止下拉不更新，上拉内容重复
}
});
}
});

}
/**
* 解析json数据，构建展示的数据源
*/
private List<WeChatNews> parseJosn(String json){
List<WeChatNews>  list1=new ArrayList<>();
if(TextUtils.isEmpty(json)){
return list1;
}
try {
JSONObject object=new JSONObject(json);
JSONArray array=object.getJSONArray("newslist");
int code=object.getInt("code");
if(code==200){
for (int i = 0;array!=null &&i < array.length(); i++) {
JSONObject obj=array.getJSONObject(i);
WeChatNews news=new WeChatNews();
news.setTitle(obj.getString("title"));
news.setDescription(obj.getString("description"));
news.setCtime(obj.getString("ctime"));
news.setPicUrl(obj.getString("picUrl"));
news.setUrl(obj.getString("url"));
list1.add(news);
}
}

} catch (JSONException e) {
e.printStackTrace();
}
return list1;
}
class MyHandle extends Handler{
@Override
public void handleMessage(Message msg) {
super.handleMessage(msg);
switch (msg.what){
case PAGE:
list=parseJosn(msg.obj.toString());
adapter.setList(list);
adapter.notifyDataSetChanged();
break;
case LOADING:
list.addAll(parseJosn(msg.obj.toString()));
adapter.notifyDataSetChanged();
break;
default:
list.addAll(parseJosn(msg.obj.toString()));
adapter.notifyDataSetChanged();
break;
}
pu_lv.onRefreshComplete();
}
}

详情页面NewsAcvitity。Java

public class NewsActivity extends AppCompatActivity {
private WebView wv;
private String url_content;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_news);
wv= (WebView) findViewById(R.id.wv);
wv.setWebViewClient(new MyClient());
Intent intent=getIntent();
url_content=intent.getStringExtra("content");
wv.loadUrl(url_content);
wv.getSettings().setBuiltInZoomControls(true);
wv.getSettings().setDisplayZoomControls(false);//隐藏缩放按钮
//        wv.getSettings().setJavaScriptEnabled(true);
//        wv.getSettings().setSupportZoom(true);
//自适应屏幕
//          设置webview推荐使用的窗口，设置为true。第二个方法是设置webview加载的页面的模式，也设置为true。
//            这方法可以让你的页面适应手机屏幕的分辨率，完整的显示在屏幕上，可以放大缩小。/

wv.getSettings().setUseWideViewPort(true);
wv.getSettings().setLoadWithOverviewMode(true);

//设置缓存模式
wv.getSettings().setAppCacheEnabled(true);
wv.getSettings().setDatabaseEnabled(true);
wv.getSettings().setDomStorageEnabled(true);
wv.getSettings().setCacheMode(WebSettings.LOAD_DEFAULT);

}
class MyClient extends WebViewClient{
@Override
public boolean shouldOverrideUrlLoading(WebView view, WebResourceRequest request) {
if(Build.VERSION.SDK_INT>Build.VERSION_CODES.LOLLIPOP){
//当Sdk版本大于21时才能使用此方法
view.loadUrl(request.getUrl().toString());
}
return super.shouldOverrideUrlLoading(view, request);
}

@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url_content);
return super.shouldOverrideUrlLoading(view, url);
}
}