Android 访问 Webapi 更新UI

首先，写一个访问webapi的工具类

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.protocol.HTTP;
import org.apache.http.util.EntityUtils;
import org.json.JSONObject;

import java.io.IOException;
import java.util.List;

/**
 * Created by Tyler on 2018/1/18
 */

public class HttpWebapi {
    public static String DoGet(String url) throws Exception {

        HttpGet httpGet = new HttpGet(url);
        HttpClient client = new DefaultHttpClient();
        HttpResponse resp = client.execute(httpGet);
        HttpEntity he = resp.getEntity();
        String respContent = EntityUtils.toString(he, "UTF-8");

        return respContent;

    }

    public static String DoPost(String url, List<NameValuePair> nvps) throws Exception {
        HttpPost httpost = new HttpPost(url);
        HttpClient client = new DefaultHttpClient();
        httpost.setEntity(new UrlEncodedFormEntity(nvps, "UTF-8"));
        HttpResponse resp = client.execute(httpost);
        HttpEntity he = resp.getEntity();
        String respContent = EntityUtils.toString(he, "UTF-8");
        return respContent;
    }

    public static String DoPost(String url, JSONObject template)throws Exception{
        HttpClient httpClient = new DefaultHttpClient();
        HttpPost httpPost = new HttpPost(url);
        httpPost.addHeader(HTTP.CONTENT_TYPE, "application/json");
        httpPost.setEntity(new StringEntity(template.toString(),"utf-8"));
        HttpResponse resp = httpClient.execute(httpPost);
        String respContent = EntityUtils.toString(resp.getEntity(), "UTF-8");
        return respContent;
    }

    //测试
    public static String getRequest(String url) {
        HttpClient hc = new DefaultHttpClient();
        HttpGet get = new HttpGet(url);
        //  HttpEntity entity = rp.getEntity();
        HttpResponse rp;
        try {
            rp = hc.execute(get);
            int statusCode = rp.getStatusLine().getStatusCode();
            return statusCode + "";
        } catch (ClientProtocolException e) {
            // TODO 自动生成的 catch 块
            e.printStackTrace();
        } catch (IOException e) {
            // TODO 自动生成的 catch 块
            e.printStackTrace();
        }
        return "";
    }

}

使用的jar：

具体调用方式：http://blog.csdn.net/hanjun0612/article/details/73741127

然后主界面

public class MainActivity extends AppCompatActivity {
    EditText editText;
//Handler更新UI
     Handler handler=new Handler(){
         @Override
         public void handleMessage(Message msg){
//信息接收完成
if(msg.what==1){
             editText.setText(msg.toString());
}
         }
     };

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

        editText = (EditText) findViewById(R.id.editText);
        //得到按钮实例
        Button hellobtn = (Button) findViewById(R.id.hellobutton);
        //设置监听按钮点击事件
        hellobtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
//开启线程，抓取数据
                new Thread(new Runnable() {
                    @Override
                    public void run() {
                        try {

                            String json = HttpWebapi.DoGet("http://192.168.1.88:802/api/WMS_Product/Test");
                            Message msg = Message.obtain();
                            msg.obj = json;
                            handler.sendMessage(msg);
                        } catch (Exception e) {
                            e.printStackTrace();
                        }

                    }
                }).start();

            }
        });

    }

}

UI界面：

<Button
        android:id="@+id/hellobutton"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:layout_marginLeft="4dp"
        android:layout_marginTop="320dp"
        android:text="@string/button_send"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <EditText
        android:id="@+id/editText"
        android:layout_width="375dp"
        android:layout_height="299dp"
        android:layout_marginLeft="4dp"
        android:layout_marginTop="4dp"
        android:ems="10"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />