（一）Android OkHttp 用户登陆demo

android开发中网络通讯必不可少，目前使用率较高的http框架有Okhttp、nohttp、volley等等，

下面做一个用户登陆的demo，说明一下Okhttp的用法，废话不多说，看代码。

LoginActivity.java

package com.junyi.shangqifixture;

import java.io.IOException;

import android.app.Activity;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import okhttp3.FormBody;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.RequestBody;
import okhttp3.Response;

public class LoginActivity extends Activity {

    private final OkHttpClient client = new OkHttpClient();
    private EditText editAccount,editPwd;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_login);

        editAccount=(EditText)findViewById(R.id.accountEdittext);
        editPwd=(EditText)findViewById(R.id.pwdEdittext);

        Button btnLogin=(Button)findViewById(R.id.login_in);
        btnLogin.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View arg0) {
                // TODO Auto-generated method stub
                new AnsyTry().execute(editAccount.getText().toString(),editPwd.getText().toString());
            }
        });
    }

    private class AnsyTry extends AsyncTask<String, Integer, String>{

        @Override
        protected String doInBackground(String... params) {
            // TODO Auto-generated method stub
            try {
                RequestBody formBody = new FormBody.Builder()
                        .add("account", params[0])
                        .add("pwd", params[1])
                        .build();

                Request request = new Request.Builder()
                        .url("http://baidu.com")
                        .post(formBody)
                        .build();

                Response response = client.newCall(request).execute();
                if(response.isSuccessful()){
                    return response.body().string();
                }
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            return null;
        }

        @Override
        protected void onPostExecute(String result) {
            // TODO Auto-generated method stub
            super.onPostExecute(result);

            //TODO 此处判断返回值
            
            Intent intent = new Intent();
            intent.setClass(LoginActivity.this, MainActivity.class);
            startActivity(intent);
            finish();
        }
    }
}

activity_login.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:background="@drawable/bkcolor"
    android:orientation="vertical" >

    <ImageView
        android:id="@+id/iv1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:layout_marginTop="20dp"
        android:src="@drawable/head" />

    <RelativeLayout
        android:id="@+id/editRel"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="20dp" >

        <RelativeLayout
            android:id="@+id/accountRel"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="14dp"
            android:background="@drawable/preference_first_item"
            android:clickable="true"
            android:gravity="center_vertical" >

            <TextView
                android:id="@+id/account"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:padding="8dp"
                android:text="@string/account"
                android:textColor="#000"
                android:textSize="17sp" />

            <EditText
                android:id="@+id/accountEdittext"
                android:layout_width="fill_parent"
                android:layout_height="wrap_content"
                android:layout_centerVertical="true"
                android:layout_marginLeft="20dip"
                android:layout_toRightOf="@id/account"
                android:background="@null"
                android:hint="@string/account"
                android:text="test"
                android:textSize="15sp" />
        </RelativeLayout>

        <RelativeLayout
            android:id="@+id/pwdRel"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:layout_below="@id/accountRel"
            android:background="@drawable/preference_last_item"
            android:clickable="true"
            android:gravity="center_vertical" >

            <TextView
                android:id="@+id/pwd"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:padding="8dp"
                android:text="@string/pwd"
                android:textColor="#000"
                android:textSize="17sp" />

            <EditText
                android:id="@+id/pwdEdittext"
                android:layout_width="fill_parent"
                android:layout_height="wrap_content"
                android:layout_centerVertical="true"
                android:layout_marginLeft="20dip"
                android:layout_toRightOf="@id/pwd"
                android:background="@null"
                android:hint="@string/pwd"
                android:text="test"
                android:inputType="textPassword"
                android:textSize="15sp" />
        </RelativeLayout>
    </RelativeLayout>

    <Button
        android:id="@+id/login_in"
        style="@style/common_button_style"
        android:layout_margin="10dp"
        android:text="@string/login_in" />

    <TextView
        android:id="@+id/sound_help"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginLeft="15dip"
        android:layout_marginTop="10dip"
        android:text="@string/forget_pwd"
        android:textColor="#29981A" />

</LinearLayout>

2016-05-31 14:52:30