版权声明:禁止转载,版权所有 https://blog.csdn.net/weixin_40281464/article/details/80079576
1.百度搜索github,进入官网搜索okhttp,选取星号最多的文章
阅读文章,查找相关的依赖,在项目app/build.gradle中添加okhttp依赖:
apply plugin: 'com.android.application'
android {
compileSdkVersion 26
defaultConfig {
applicationId "com.example.yls.demoa"
minSdkVersion 15
targetSdkVersion 26
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation 'com.android.support:appcompat-v7:26.0.0-beta1'
implementation 'com.android.support.constraint:constraint-layout:1.0.2'
testImplementation 'junit:junit:4.12'
androidTestImplementation 'com.android.support.test:runner:0.5'
androidTestImplementation 'com.android.support.test.espresso:espresso-core:2.2.2'
implementation 'com.squareup.okhttp3:okhttp:3.10.0'
}
2.画出主布局
<?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:orientation="vertical"
android:layout_height="match_parent"
tools:context="com.example.yls.demoa.MainActivity">
<Button
android:id="@+id/btn_start"
android:text="点击"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<TextView
android:id="@+id/tv_result"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Hello World!" />
</LinearLayout>
3.将布局中的控件在MainActivity中初始化并绑定其id:
private Button button;
private TextView textView;
private Handler handler;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initViews();
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
getWebUseOKhttp();
}
});
private void initViews() {
button = findViewById(R.id.btn_start);
textView = findViewById(R.id.tv_result);
handler = new Handler(new Handler.Callback() {
@Override
public boolean handleMessage(Message message) {
}
});
开始写入主方法:
private void getWebUseOKhttp() {
OkHttpClient okHttpClient = new OkHttpClient();
String url = "http://www.baidu.com";
Request request = new Request.Builder().url(url).build();
Call call = okHttpClient.newCall(request);
call.enqueue(new Callback() {
@Override
public void onFailure(Call call, IOException e) {
Log.e("Mainactivity", e.toString());
}
@Override
public void onResponse(Call call, Response response) throws IOException {
Message message = new Message();
message.what = GET_MSG;
message.obj = response.body().string();
handler.sendMessage(message);
}
});
}
在AndroidMainfest中添加网络权限:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.yls.demoa">
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
<uses-permission android:name="android.permission.INTERNET"/>
</manifest>
打开模拟器,运行软件:
这样软件就成功的读取了百度网站的信息,接下来我们运用post方法来继续运行程序
方法大同小异,只需要修改一下前面的方法体,来做一个手机号码归属地查询的方法
4.在百度中搜索webxml
点击第一个网站,点击手机号码归属地查询,获取其网络地址
String url = "http://ws.webxml.com.cn/WebServices/MobileCodeWS.asmx/getMobileCodeInfo";
重新编写方法体:
private void getWebUseOKhttpPost() {
String url = "http://ws.webxml.com.cn/WebServices/MobileCodeWS.asmx/getMobileCodeInfo";
OkHttpClient okHttpClient = new OkHttpClient();
RequestBody requestBody = new FormBody.Builder().add("MobileCode","13687654321")
.add("userID","").build();
Request request = new Request.Builder().url(url).post(requestBody).build();
Call call = okHttpClient.newCall(request);
call.enqueue(new Callback() {
@Override
public void onFailure(Call call, IOException e) {
Log.e("Mainactivity", e.toString());
}
@Override
public void onResponse(Call call, Response response) throws IOException {
Message message = new Message();
message.what = GET_MSG;
message.obj = response.body().string();
handler.sendMessage(message);
}
});
}
从上面的代码我们发现跟前面的个头方法没有多大的区别,区别是使用了FormBody.Builder()
方法,在这个方法中通过add()方法添加数据,然后在Request.Builder()中添加post()方法
接下来运行一下程序:
根据图片可以看出已经获得数据,但应网站的收费问题显示免费查询次数不足,但是问题不大。
本次易出现的问题还是关于网络权限的问题,这些大多请求网站类的软件都是需要在AndroidManifest中
添加网络权限:<uses-permission android:name="android.permission.INTERNET"/>
好的本次博客就先到这里,这是我上课时所撰写的,如有不足,下次更新补上。
加油,认真学习的时间总是过的飞快!!!!!!!!!!!!!!!