Okhttp框架的使用

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//添加的权限

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

//主Activity

/**
* okhttp请求步骤：
* 1.创建okhttpClient对象
* 2.创建Request请求
* 3.执行请求(把请求转换成一个任务，执行任务)
*/
public class MainActivity extends AppCompatActivity {
ImageView imageView;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
imageView = (ImageView) findViewById(R.id.imageView);

}

public void onClick(View view) {
switch (view.getId()){
case R.id.get_btn:
getNetString();
break;
case R.id.post_btn:
postNetString();
break;
case R.id.img_btn:
getImagBitmap();
break;
}

}

//主要执行的步骤

private void getImagBitmap() {
OkHttpClient client = new OkHttpClient();

Request request = new Request.Builder()
.url("http://pic.nipic.com/2008-05-26/200852684031634_2.jpg")
.build();
Call call = client.newCall(request);
call.enqueue(new Callback() {

//重写的方法
@Override
public void onFailure(Call call, IOException e) {

}

//得到成功的返回内容自己解析
@Override
public void onResponse(Call call, Response response) throws IOException {
byte[] bytes = response.body().bytes();
final Bitmap bmp = BitmapFactory.decodeByteArray(bytes, 0, bytes.length);

//相当于Handler.post(Runnable对象)，此方法在Activity中调用
runOnUiThread(new Runnable() {
@Override
public void run() {
imageView.setImageBitmap(bmp);
}
});

}
});

}

private void postNetString() {
/**
* String baseUrl = http://mrobot.pcauto.com.cn/v2/cms/channels/1?

post提交的字段：pageNo=1&pageSize=20&serialIds=2143,3404&v=4.0.0
*/
OkHttpClient client =new OkHttpClient();

//提交给服务器的请求体内容
RequestBody body =new FormBody.Builder()
.add("pageNo","1")
.add("pageSize","20")
.add("serialIds","2143,3404")
.add("v","4.0.0")
.build();
Request request
= new Request.Builder()
.url("http://mrobot.pcauto.com.cn/v2/cms/channels/1?")
.post(body)
.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 {
Log.e("sxl","==onResponse==="+response.body().string());
}
});

}

public void getNetString() {
OkHttpClient okHttpClient = new OkHttpClient();
//请求携带地址(默认是get请求) 获得请求
Request request = new Request.Builder()
.url("http://a121.baopiqi.com/api/mh/getVideoClassification.php?&appname=%E7%88%B1%E6%83%85%E6%BC%AB%E7%94%BB%E7%B2%BE%E9%80%89&pkgname=com.platform.cartoonl&imei=863191020203140&versionname=1.2.7&page=0&limit=12")
// .url("http://mrobot.pcauto.com.cn/v2/cms/channels/1?pageNo=1&pageSize=20&serialIds=2143,3404&v=4.0.0")
.build();
//一个Call就是一个任务
Call call = okHttpClient.newCall(request);
//同步：同一时刻只有一个任务在进行 execute()
//异步：同一时刻多个任务在执行 enqueue()
call.enqueue(new Callback() {
@Override
public void onFailure(Call call, IOException e) {

}
//请求成功
@Override
public void onResponse(Call call, Response response) throws IOException {
Log.e("sxl", "===响应的结果==" + response.body().string());
}
});

}

}

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