xUtils框架网络获取

1.导包和添加权限

<uses-permission android:name="android.permission.INTERNET"/>

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

2.自己创个类继承Application

public class MyApp extends Application {

    @Override
    public void onCreate() {
        super.onCreate();
        x.Ext.init(this);//初始化xutils
        x.Ext.setDebug(BuildConfig.DEBUG);//是否输出debug日志，开启debug会影响性能

    }
}

3.在AndroidManifest里面使用

4.主函数

public class MainActivity extends AppCompatActivity{

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);


    }

    public void onClick(View view) {
        switch (view.getId()){
            case R.id.get_btn:
                getData();
                break;
            case R.id.post_btn:
                postData();
                break;
        }

    }
    //使用post请求获取网络数据
    private void postData() {
        String path = "http://218.244.149.129:9010/api/companylist.php";
        RequestParams params = new RequestParams(path);
        params.addBodyParameter("industryid", "98");

        x.http().post(params, new Callback.CommonCallback<String>() {
            @Override
            public void onSuccess(String result) {
                Log.d("sxl", "onSuccess: "+result);
            }

            @Override
            public void onError(Throwable ex, boolean isOnCallback) {

            }

            @Override
            public void onCancelled(CancelledException cex) {

            }

            @Override
            public void onFinished() {
                Log.d("sxl", "onFinished: ");
            }
        });
        
        
        
    }
    //使用get请求获取网络数据
    public void getData() {
        String path = "http://218.244.149.129:9010/api/industry.php";
        RequestParams params = new RequestParams(path);
        Callback.Cancelable cancelable = x.http().get(params, new Callback.CommonCallback<String>() {
            @Override
            public void onSuccess(String result) {
                // 该方法   是 成功 返回值
                Log.d("TAG", "onSuccess: " + Thread.currentThread().getId() + "____s" + result);
            }

            @Override
            public void onError(Throwable ex, boolean isOnCallback) {
                // 错误的时候
                Log.d("TAG", "onError: ");
            }

            @Override
            public void onCancelled(CancelledException cex) {
                // 取消的时候
                Log.d("TAG", "onCancelled: ");
            }

            @Override
            public void onFinished() {
                //结束的时候     该方法 每次请求后 必然 执行的一个方法
                Log.d("TAG", "onFinished: ");
            }
        });
        cancelable.cancel();//取消此次网络访问
    }
}

5.listview适配器

public class MyAdapter extends BaseAdapter {
    private ArrayList<Data> list;
    private Context mContext;
    private LayoutInflater mInflater;

    public MyAdapter(ArrayList<Data> list, Context context) {
        this.list = list;
        mContext = context;
        mInflater = LayoutInflater.from(context);
    }

    @Override
    public int getCount() {
        return list.size();
    }

    @Override
    public Object getItem(int i) {
        return list.get(i);
    }

    @Override
    public long getItemId(int i) {
        return i;
    }

    @Override
    public View getView(int i, View view, ViewGroup viewGroup) {
        ViewHoler vh = null;
        if(view==null){
            vh = new ViewHoler();
            view = mInflater.inflate(R.layout.item,viewGroup,false);
            vh.pic_img = (ImageView) view.findViewById(R.id.img);
            vh.tv = (TextView) view.findViewById(R.id.title_tv);
            view.setTag(vh);
        }else {
            vh = (ViewHoler) view.getTag();
        }
        Data data = (Data) getItem(i);
        //TODO 设置
        return view;
    }

    class ViewHoler{
        ImageView pic_img;
        TextView tv;
    }
}

6.主布局

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context="com.bw.alice.aday17xutils.MainActivity">
   <Button
       android:id="@+id/get_btn"
       android:layout_width="match_parent"
       android:layout_height="wrap_content"
       android:onClick="onClick"
       android:text="get请求"/>

   <Button
       android:id="@+id/post_btn"
       android:layout_width="match_parent"
       android:layout_height="wrap_content"
       android:onClick="onClick"
       android:text="post请求"/>

   <ListView
       android:layout_width="match_parent"
       android:layout_height="match_parent"
       android:id="@+id/lv"></ListView>
</LinearLayout>

7.item布局

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.bw.alice.aday17xutils.MainActivity">

    <ImageView
        android:id="@+id/img"
        android:layout_width="100dp"
        android:layout_height="100dp"
        android:layout_margin="5dp"/>

    <TextView
        android:id="@+id/title_tv"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_toRightOf="@id/img"
        android:textSize="20sp"/>

</RelativeLayout>