xUtils框架网络获取

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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>

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