webview的使用

xml页面使用

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

在mainActivity中长按xlistview显示webview，（通过跳转传值的）

public class MainActivity extends AppCompatActivity {    private  List<MyShuJu.NewslistBean> data = new ArrayList<>();    private List<String> list = new ArrayList<>();    private XListView xlistview;    private ViewPager viewPager;    private String part= "http://api.tianapi.com/tiyu/?key=36bafe109f1b68cc2c3829db69c7c180&num=";    private int index = 3;    private String url=part+index;    private int type=1;    private DisplayImageOptions option;    private Myadapter myadapter;    @SuppressLint("HandlerLeak")    private Handler handler = new Handler(){        @Override        public void handleMessage(Message msg) {            if(msg.what == 0){                int currentItem = viewPager.getCurrentItem();                viewPager.setCurrentItem(currentItem+1);                handler.sendEmptyMessageDelayed(0,2000);            }        }    };    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        //初始化图片        ImageLoaderutils.initImageLoader(MainActivity.this);        option = ImageLoaderutils.getImageOption(MainActivity.this);        //找控件        xlistview = findViewById(R.id.xlistview);        viewPager = findViewById(R.id.viewpager);        //viewpager        Newviewpager();        //xlistview        NewXlistview();        //xlistview获取参数与实例化适配器        requestData();    }    //xlistview相关操作    private void NewXlistview() {        xlistview.setPullRefreshEnable(true);        xlistview.setPullLoadEnable(true);        xlistview.setXListViewListener(new XListView.IXListViewListener() {            @Override            public void onRefresh() {                index=3;                url=part+index;                type=1;                requestData();            }            @Override            public void onLoadMore() {                index++;                url=part+index;                type=2;                requestData();            }        });        //XListView的长摁事件        xlistview.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {            @Override            public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long id) {                Intent intent = new Intent(MainActivity.this,Main2Activity.class);                intent.putExtra("url",data.get(position-1).getUrl());                startActivity(intent);                return true;            }        });    }    //xlistview获取参数与实例化适配器    private void requestData() {            MyNetTask task = new MyNetTask(new MyNetTask.IcallBack() {                @Override                public void getJsonData(String jsonStr) {                    Gson gson = new Gson();                    MyShuJu myShuJu = gson.fromJson(jsonStr, MyShuJu.class);                    if (type==1)                    {                        data.clear();                    }                    data.addAll(myShuJu.getNewslist());                    if (myadapter==null)                    {                        myadapter = new Myadapter();                        xlistview.setAdapter(myadapter);                    }else {                        myadapter.notifyDataSetChanged();                    }                    if (type==1)                    {                        xlistview.stopRefresh();                    }else {                        xlistview.stopLoadMore();                    }                }            });        task.execute(url);        }    //viewpager相关操作    private void Newviewpager() {        MyNetTask task = new MyNetTask(new MyNetTask.IcallBack() {            @Override            public void getJsonData(String jsonStr) {                Gson gson = new Gson();                MypagerBean myShuJu = gson.fromJson(jsonStr, MypagerBean.class);                List<MypagerBean.NewslistBean> newslist = myShuJu.getNewslist();                for (int i = 0 ;i<newslist.size();i++){                    String picUrl = newslist.get(i).getPicUrl();                    list.add(picUrl);                }                viewPager.setAdapter(new MyPagerAdapter());                viewPager.setCurrentItem(list.size()*10000);                handler.sendEmptyMessageDelayed(0,2000);            }        });        task.execute("https://api.tianapi.com/wxnew/?key=48a7d7193e11bd2dd4a683b6e2f90a4f&num=10&page=1");    }    //ViewPager的适配器    class MyPagerAdapter extends PagerAdapter{        @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(MainActivity.this);            ImageLoader.getInstance().displayImage(list.get(position%list.size()),imageView,option);            imageView.setScaleType(ImageView.ScaleType.FIT_XY);            container.addView(imageView);            return imageView;        }        @Override        public void destroyItem(ViewGroup container, int position, Object object) {            container.removeView((View)object);        }    }    //xlistview的适配器    class Myadapter extends BaseAdapter{        @Override        public int getViewTypeCount() {            return 2;        }        @Override        public int getItemViewType(int position) {            if(position%2==0){                return 0;            }else{                return 1;            }        }        @Override        public int getCount() {            return data.size();        }        @Override        public Object getItem(int i) {            return null;        }        @Override        public long getItemId(int i) {            return 0;        }        @Override        public View getView(int i, View view, ViewGroup viewGroup) {            int itemViewType = getItemViewType(i);            if(itemViewType == 0){                ViewHolder0 holder0;                if(view == null){                    view = View.inflate(MainActivity.this,R.layout.listview0,null);                    holder0= new ViewHolder0();                    holder0.tu = view.findViewById(R.id.tu_list0);                    holder0.name = view.findViewById(R.id.name_list0);                    view.setTag(holder0);                }else{                    holder0 = (ViewHolder0) view.getTag();                }                    ImageLoader.getInstance().displayImage(data.get(i).getPicUrl(),holder0.tu,option);                    holder0.name.setText(data.get(i).getTitle());            }else{                ViewHolder1 holder1;                if(view == null){                    view = View.inflate(MainActivity.this,R.layout.listview1,null);                    holder1= new ViewHolder1();                    holder1.name = view.findViewById(R.id.name_list1);                    view.setTag(holder1);                }else{                    holder1 = (ViewHolder1) view.getTag();                }                holder1.name.setText(data.get(i).getTitle());            }            return view;        }        class ViewHolder0{            ImageView tu;            TextView name;        }        class ViewHolder1{            TextView name;        }    }

接收到传的URl

public class Main2Activity extends AppCompatActivity {    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main2);        WebView web = findViewById(R.id.Web);        Intent intent = getIntent();        String url = intent.getStringExtra("url");        //设置WebView属性，能够执行Javascript脚本        web.getSettings().setJavaScriptEnabled(true);        //加载需要显示的网页        web.loadUrl(url);        web.setWebViewClient(new HelloWebViewClient ());    }    private class HelloWebViewClient extends WebViewClient {        @Override        public boolean shouldOverrideUrlLoading(WebView view, String url) {            view.loadUrl(url);            return true;        }    }}