首先使用OKHTTP 那我们必须导入一下依赖
compile 'com.squareup.okhttp3:okhttp:3.4.2'
接下来一定要切记 配置网络权限
<uses-permission android:name="android.permission.INTERNET"/>
MainActivity
使用OKHTTP 操作的具体步骤,详解
package com.example.postlogin;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.text.TextUtils;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
import java.io.IOException;
import java.util.concurrent.TimeUnit;
import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.FormBody;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
private EditText mEdName;
private EditText mEdPwd;
private Button mBtnLogin;
private TextView mTv;
private String path = "http://169.254.53.96:8080/web/LoginServlet";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//初始化资源控件
initView();
}
//获取资源控件id
private void initView() {
mEdName = (EditText) findViewById(R.id.ed_name);
mEdPwd = (EditText) findViewById(R.id.ed_pwd);
mBtnLogin = (Button) findViewById(R.id.btn_login);
mTv = (TextView) findViewById(R.id.tv);
mBtnLogin.setOnClickListener(this);
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.btn_login:
//首先获取用户输入的账号和密码
String username = mEdName.getText().toString().trim();
String password = mEdPwd.getText().toString().trim();
//判断用户输入的账号与密码是否为空
if (TextUtils.isEmpty(username) || TextUtils.isEmpty(password)){
Toast.makeText(this, "输入不能为空", Toast.LENGTH_SHORT).show();
return;
}
//////////////////////////// ---------- 使用OKHTTP -- Post请求方式完成登录案列 ------------- ///////////////
//1.创建okHttpClient对象 以及读取,写入,连接超时
OkHttpClient client = new OkHttpClient.Builder()
//读取超时
.readTimeout(10,TimeUnit.SECONDS)
//写入超时
.writeTimeout(10,TimeUnit.SECONDS)
//连接超时
.connectTimeout(10,TimeUnit.SECONDS)
.build();
//2.创建FormBody
FormBody formBody = new FormBody.Builder()
.add("qq",username)
.add("pwd",password)
.build();
//3.创建request对象
final Request request = new Request.Builder()
//请求方式
.post(formBody)
//请求接口地址
.url(path)
.build();
//4.创建call对象
Call call = client.newCall(request);
//5.使用call调用 enqueue完成网络请求
call.enqueue(new Callback() {
//请求失败时调用此方法
@Override
public void onFailure(Call call, IOException e) {
runOnUiThread(new Runnable() {
@Override
public void run() {
Toast.makeText(MainActivity.this, "请求网络数据失败", Toast.LENGTH_SHORT).show();
}
});
}
//请求成功时调用该方法
@Override
public void onResponse(Call call, final Response response) throws IOException {
runOnUiThread(new Runnable() {
@Override
public void run() {
try {
String result = response.body().string();
mTv.setText(result);
} catch (IOException e) {
e.printStackTrace();
}
}
});
}
});
break;
}
}
}
布局文件
<?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=".MainActivity">
<EditText
android:id="@+id/ed_name"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="请输入账号"/>
<EditText
android:id="@+id/ed_pwd"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:inputType="textPassword"
android:hint="请输入密码"/>
<Button
android:id="@+id/btn_login"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="登录"/>
<TextView
android:id="@+id/tv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="显示请求结果"/>
</LinearLayout>