implementation 'com.squareup.okhttp3:okhttp:3.11.0'
一、GET请求
注：回调的Callback在子线程执行，不能更新UI
private void doGet() { //1.获取OkHttpClient对象
OkHttpClient okHttpClient = new OkHttpClient(); //2.获取Request对象
Request request = new Request.Builder().get().url("http://www.baidu.com").build(); //3.将Request封装为Call对象
Call call = okHttpClient.newCall(request); //4.执行Call
call.enqueue(new Callback() { @Override
public void onFailure(Call call, IOException e) {
Log.e(TAG, "onFailure: " + e);
} @Override
public void onResponse(Call call, Response response) throws IOException {
Log.e(TAG, "onResponse: " + response.body().string());
}
});
}将访问百度的服务器，服务器返回的内容体便是百度首页的html
百度首页html.png
二、POST请求
private void doPost() { //1.获取OkHttpClient对象
OkHttpClient okHttpClient = new OkHttpClient(); //2.构造RequestBody
FormBody body = new FormBody.Builder().add("id", "26").build();
Request request = new Request.Builder().url(Cons.BASE_URL+"swords/postFind").post(body).build(); //3.将Request封装为Call对象
Call call = okHttpClient.newCall(request); //4.执行Call
call.enqueue(new Callback() { @Override
public void onFailure(Call call, IOException e) {
Log.e(TAG, "onFailure: " + e);
} @Override
public void onResponse(Call call, Response response) throws IOException {
String result = response.body().string();
Log.e(TAG, "onResponse: " + result);
runOnUiThread(() -> ToastUtil.showAtOnce(MainActivity.this, result));
}
});
}
post请求.png
三、POST请求的请求体中添加文本
private void doPostStr() { //1.获取OkHttpClient对象
OkHttpClient okHttpClient = new OkHttpClient(); //2.构造RequestBody
RequestBody body = RequestBody.create(MediaType.parse("text/plain;chaset=utf-8"), "轻轻的我走了，\n" + "正如我轻轻的来；\n" + "我轻轻的招手，\n" + "作别西天的云彩。\n" + "\n" + "那河畔的金柳，\n" + "是夕阳中的新娘；\n" + "波光里的艳影，\n" + "在我的心头荡漾。\n);
Request request = new Request.Builder().url(Cons.BASE_URL+"PostString").post(body).build();
//3.将Request封装为Call对象
Call call = okHttpClient.newCall(request);
//4.执行Call
call.enqueue(new Callback() {
@Override
public void onFailure(Call call, IOException e) {
Log.e(TAG, "onFailure: " + e);
}
@Override
public void onResponse(Call call, Response response) throws IOException {
String result = response.body().string();
Log.e(TAG, "onResponse: " + result);
runOnUiThread(() -> ToastUtil.showAtOnce(MainActivity.this, result));
}
});
}
post请求body中加入文本.png
四、通过流传输文件
private void doPostFile() {
File file = new File(Environment.getExternalStorageDirectory(), "DCIM/Camera/iv_500x400.png"); //1.获取OkHttpClient对象
OkHttpClient okHttpClient = new OkHttpClient(); //2.构造Request--任意二进制流：application/octet-stream
Request request = new Request.Builder()
.url(Cons.BASE_URL + "PostFile")
.post(RequestBody.create(MediaType.parse("application/octet-stream"), file)).build(); //3.将Request封装为Call对象
Call call = okHttpClient.newCall(request); //4.执行Call
call.enqueue(new Callback() { @Override
public void onFailure(Call call, IOException e) {
Log.e(TAG, "onFailure: " + e);
} @Override
public void onResponse(Call call, Response response) throws IOException {
String result = response.body().string();
Log.e(TAG, "onResponse: " + result);
runOnUiThread(() -> ToastUtil.showAtOnce(MainActivity.this, result));
}
});
}
上传文件.png
五、通过模拟表单上传文件：MultipartBody
/**
* 模拟表单上传文件：通过MultipartBody
*/private void doUpload() {
File file = new File(Environment.getExternalStorageDirectory(), "DCIM/Camera/iv_500x400.png");
RequestBody fileBody = RequestBody.create(MediaType.parse("application/octet-stream"), file); //1.获取OkHttpClient对象
OkHttpClient okHttpClient = new OkHttpClient(); //2.获取Request对象
RequestBody requestBody = new MultipartBody.Builder()
.setType(MultipartBody.FORM)
.addFormDataPart("file", "test.jpg", fileBody)
.build();
Request request = new Request.Builder()
.url(Cons.BASE_URL + "upload")
.post(requestBody).build(); //3.将Request封装为Call对象
Call call = okHttpClient.newCall(request); //4.执行Call
call.enqueue(new Callback() { @Override
public void onFailure(Call call, IOException e) {
Log.e(TAG, "onFailure: " + e);
} @Override
public void onResponse(Call call, Response response) throws IOException {
String result = response.body().string();
Log.e(TAG, "onResponse: " + result);
runOnUiThread(() -> ToastUtil.showAtOnce(MainActivity.this, result));
}
});
}六、下载文件：
private void doDownload() { //1.获取OkHttpClient对象
OkHttpClient okHttpClient = new OkHttpClient(); //2.获取Request对象
Request request = new Request.Builder().get().url(Cons.BASE_URL + "imgs/test.jpg").build(); //3.将Request封装为Call对象
Call call = okHttpClient.newCall(request); //4.执行Call
call.enqueue(new Callback() { @Override
public void onFailure(Call call, IOException e) {
Log.e(TAG, "onFailure: " + e);
} @Override
public void onResponse(Call call, Response response) throws IOException {
File file = new File(Environment.getExternalStorageDirectory(), "download.jpg");
InputStream is = response.body().byteStream();
FileOutputStream fos = new FileOutputStream(file); byte[] buf = new byte[102]; int len = 0; while ((len = is.read(buf)) != -1) {
fos.write(buf, 0, len);
}
fos.close();
is.close();
}
});
}
下载本地.png
七、在安卓端显示图片：
有了流，一切都好办：
response.body().byteStream()
关于Bitmap的预处理等操，这里就不多说了，有兴趣的可见1-MI-Android多媒体之Bitmap：
private void showImg() { //1.获取OkHttpClient对象
OkHttpClient okHttpClient = new OkHttpClient(); //2.获取Request对象
Request request = new Request.Builder().get().url(Cons.BASE_URL + "imgs/test.jpg").build(); //3.将Request封装为Call对象
Call call = okHttpClient.newCall(request); //4.执行Call
call.enqueue(new Callback() { @Override
public void onFailure(Call call, IOException e) {
Log.e(TAG, "onFailure: " + e);
} @Override
public void onResponse(Call call, Response response) throws IOException {
InputStream is = response.body().byteStream();
Bitmap bitmap = BitmapFactory.decodeStream(is);
runOnUiThread(()->{
mIdIvShow.setImageBitmap(bitmap);
});
}
});
}
安卓显示.png
作者：张风捷特烈
链接：https://www.jianshu.com/p/7c286f65f7d1
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