为何要使用okHttp?
对于像我这种“手无寸铁”的初学者来说,刚开始接触安卓的httpUrlConnection,完全不知所然,面对一长串的代码,心里打着退堂鼓。“为何安卓的网络请求这么麻烦?有没有像网络前端中js框架JQUERY一样,专有提供简化安卓网络求情框架的呢?”。答案是:有的。那就是okHttp!okHttp地址
使用okHttp进行POST登陆
okHttp文档简介明了,都有相关案例,阅读起来易懂。至于怎么选择,怎么用,都有相关案例,要进行POST登陆,就得提交表单数据(用户名、密码等)进行验证。于是定位到以下图片中的使用方法:
根据方法提示,写出以下代码:
package com.okhttp.okhttp;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.widget.TextView;
import java.io.IOException;
import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.MultipartBody;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.RequestBody;
import okhttp3.Response;
public class PostActivity extends AppCompatActivity {
private final OkHttpClient client=new OkHttpClient();
private TextView postTextView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_post);
postTextView=(TextView) findViewById(R.id.tvPost);
try {
run();
} catch (Exception e) {
e.printStackTrace();
}
}
public void run() throws Exception {
RequestBody requestBody = new MultipartBody.Builder()
.setType(MultipartBody.FORM)
.addFormDataPart("username","username")
.addFormDataPart("password","password")
.addFormDataPart("method","login")
.addFormDataPart("key","*******")
.build();
Request request=new Request.Builder()
.url("https://zgyu******.php")
.post(requestBody)
.build();
Call call=client.newCall(request);
call.enqueue(new Callback() {
@Override
public void onFailure(Call call, IOException e) {
}
@Override
public void onResponse(Call call, Response response) throws IOException {
if(response.isSuccessful()){
final String content=response.body().string();
runOnUiThread(new Runnable() {
@Override
public void run() {
Log.e("TAG",content);
postTextView.setText(content);
}
});
}
}
});
}
}
得到服务器返回字符串,登陆成功!
总结
okHttp极大简化了安卓网络请求代码,对初学者是十分有帮助的,在未来学习中,可了解更多andorid框架,先从框架入手,简化学习过程,降低学习难度,提高学习效率。