android post请求

最新推荐文章于 2025-08-23 20:56:03 发布

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最新推荐文章于 2025-08-23 20:56:03 发布

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文章标签：移动开发 json java

原文链接：http://www.cnblogs.com/yudada/p/7883091.html

本文介绍了一个基于Android的应用案例，展示了如何使用GET和POST请求来获取和发送数据。具体包括使用AsyncTask进行异步网络操作、Gson进行JSON解析、Picasso加载图片等关键技术。

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package net.bwie.network.activity;

import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;

import com.google.gson.Gson;
import com.squareup.picasso.Picasso;

import net.bwie.network.R;
import net.bwie.network.bean.KaiYan;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.List;

/**
 * 下一页post请求
 * 使用异步任务下载网络数据
 * 使用gson解析
 * 注：有时间看看我讲的原生json解析
 */
public class MainActivity extends AppCompatActivity implements View.OnClickListener {

    public static final String KAI_YAN_URL = "http://baobab.kaiyanapp.com/api/v4/tabs/selected?udid=11111&vc=168&vn=3.3.1&deviceModel=Huawei%36&first_channel=eyepetizer_baidu_market&last_channel=eyepetizer_baidu_market&system_version_code=20";

    protected Button mGetNetworkDataBtn;
    protected Button mGetPicBtn;
    protected ImageView mImageView;
    protected Button mNextBtn;

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

    @Override
    public void onClick(View view) {
        if (view.getId() == R.id.get_network_data_btn) {
            getDatas();
        } else if (view.getId() == R.id.get_pic_btn) {
            getPicture();
        } else if (view.getId() == R.id.next_btn) {
            PostActivity.startActivity(this);
        }
    }

    private void getDatas() {
        MyTask task = new MyTask();
        task.execute(KAI_YAN_URL);
    }

    private void getPicture() {
        String imgUrl = "http://img.kaiyanapp.com/1699f3946ccd281230a1d887d169439f.png?imageMogr2/quality/60/format/jpg";

        Picasso
                .with(this)
                .load(imgUrl)
                .into(mImageView);
    }

    private void initView() {
        mGetNetworkDataBtn = (Button) findViewById(R.id.get_network_data_btn);
        mGetNetworkDataBtn.setOnClickListener(MainActivity.this);
        mGetPicBtn = (Button) findViewById(R.id.get_pic_btn);
        mGetPicBtn.setOnClickListener(MainActivity.this);
        mImageView = (ImageView) findViewById(R.id.image_view);
        mNextBtn = (Button) findViewById(R.id.next_btn);
        mNextBtn.setOnClickListener(MainActivity.this);
    }

    private class MyTask extends AsyncTask<String, Void, List<KaiYan.ItemBean>> {

        @Override
        protected List<KaiYan.ItemBean> doInBackground(String... params) {
            String requestUrl = params[0];
            // 使用HTTPUrlConnection
            try {
                URL url = new URL(requestUrl);
                HttpURLConnection connection = (HttpURLConnection) url.openConnection();
                // 配置connection
                connection.setRequestMethod("GET");// GET或POST必须大写
                // 连接网络
                connection.connect();
                // 判断是否连接成功
                if (connection.getResponseCode() == 200) {
                    // 获取来自网络的输入流
                    // 使用缓冲字符输入流
                    // 字节流转字符流
                    BufferedReader br = null;
                    br = new BufferedReader(new InputStreamReader(connection.getInputStream()));

                    // 最终接收的json字符串
                    String json = "";
                    // 使用缓冲流读取到的每一行数据
                    String line = "";

                    while ((line = br.readLine()) != null) {
                        json += line.trim();
                    }
                    // json数据产生完毕，该解析了
                    Gson gson = new Gson();
                    KaiYan kaiYan = gson.fromJson(json, KaiYan.class);
                    List<KaiYan.ItemBean> itemList = kaiYan.getItemList();
                    return itemList;

                }
            } catch (Exception e) {
                e.printStackTrace();
                Log.d("1507", e.getMessage());
            }


            return null;
        }

        @Override
        protected void onPostExecute(List<KaiYan.ItemBean> itemList) {
            super.onPostExecute(itemList);

            // 可以使用RecyclerView或ListView展示数据
            for (KaiYan.ItemBean itemBean : itemList) {
                Log.d("1507", "type: " + itemBean.getType() +
                        ", title: " + itemBean.getData().getTitle() +
                        ", url" + itemBean.getData().getPlayUrl());
            }
        }
    }

}

package net.bwie.network.activity;

import android.content.Context;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.View;
import android.widget.Button;

import com.google.gson.Gson;

import net.bwie.network.R;
import net.bwie.network.bean.Person;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;

/**
 * 当前案例：
 * 上传姓名和年龄，返回JSON字符串
 */
public class PostActivity extends AppCompatActivity implements View.OnClickListener {

    protected Button mPostBtn;

    public static void startActivity(Context context) {
        context.startActivity(new Intent(context, PostActivity.class));
    }

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

    @Override
    public void onClick(View view) {
        if (view.getId() == R.id.post_btn) {
            doPost();
        }
    }

    // 使用异步任务执行POST请求
    private void doPost() {
        String url = "http://172.21.66.7:8080/postdemo";

        PostTask task = new PostTask();
        task.execute(url);
    }

    private void initView() {
        mPostBtn = (Button) findViewById(R.id.post_btn);
        mPostBtn.setOnClickListener(PostActivity.this);
    }

    private class PostTask extends AsyncTask<String, Void, Person> {

        @Override
        protected Person doInBackground(String... params) {
            String requestUrl = params[0];
//
            try {
                URL url = new URL(requestUrl);
                HttpURLConnection connection = (HttpURLConnection) url.openConnection();
                // 设置POST请求
                connection.setRequestMethod("POST");
                // 设置可向服务器输出
                connection.setDoOutput(true);
                connection.setDoInput(true);
                // 打开连接
                connection.connect();

                // 打开连接后，向服务端写要提交的参数
                // 参数格式：“name=asdasdas&age=123123”
                StringBuilder stringBuilder = new StringBuilder();
                stringBuilder.append("name=")
                        .append("wuyanzu")// 拼接自己传入的姓名
                        .append("&")
                        .append("age=")
                        .append("123");// 拼接自己传入的年龄
                // 获取向服务器写数据的输出流
                connection.getOutputStream()
                        .write(stringBuilder.toString().getBytes());

                // 提交数据后，获取来自服务器的json数据
                if (connection.getResponseCode() == 200) {
                    BufferedReader br = null;
                    br = new BufferedReader(new InputStreamReader(connection.getInputStream()));

                    String json = "";
                    String line = "";

                    while ((line = br.readLine()) != null) {
                        json += line.trim();
                    }

                    // 解析
                    Gson gson = new Gson();
                    Person person = gson.fromJson(json, Person.class);
                    return person;

                }

            } catch (Exception e) {
                e.printStackTrace();
                Log.d("1507", e.getMessage());
            }


            return null;
        }

        @Override
        protected void onPostExecute(Person person) {
            super.onPostExecute(person);


            Log.d("1507", "name:" + person.getName() + ", age: " + person.getAge());
        }
    }

}

package net.bwie.network.bean;

import java.util.List;

public class KaiYan {

    private List<ItemBean> itemList;

    public List<ItemBean> getItemList() {
        return itemList;
    }

    public void setItemList(List<ItemBean> itemList) {
        this.itemList = itemList;
    }

    public static class ItemBean {

        private String type = "";
        private DataBean data;

        public String getType() {
            return type;
        }

        public void setType(String type) {
            this.type = type;
        }

        public DataBean getData() {
            return data;
        }

        public void setData(DataBean data) {
            this.data = data;
        }

        public static class DataBean {

            private String playUrl = "";
            private String title = "";

            public String getPlayUrl() {
                return playUrl;
            }

            public void setPlayUrl(String playUrl) {
                this.playUrl = playUrl;
            }

            public String getTitle() {
                return title;
            }

            public void setTitle(String title) {
                this.title = title;
            }
        }

    }

}

package net.bwie.network.bean;

public class Person {

    private String name = "";
    private String age = "";

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getAge() {
        return age;
    }

    public void setAge(String age) {
        this.age = age;
    }
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context="net.bwie.network.activity.MainActivity">

    <Button
        android:id="@+id/next_btn"
        android:text="下一页POST请求"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"/>

    <Button
        android:id="@+id/get_network_data_btn"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="下载网络数据"/>

    <Button
        android:id="@+id/get_pic_btn"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="获取网络图片"/>

    <ImageView
        android:id="@+id/image_view"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@mipmap/ic_launcher"/>

</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="net.bwie.network.activity.PostActivity">

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

</android.support.constraint.ConstraintLayout>

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

compile 'com.android.support:appcompat-v7:26.+'
compile 'com.android.support.constraint:constraint-layout:1.0.2'
compile 'com.google.code.gson:gson:2.2.4'
compile 'com.squareup.picasso:picasso:2.3.2'
testCompile 'junit:junit:4.12'

转载于:https://www.cnblogs.com/yudada/p/7883091.html