OkHttp的使用
1.导入依赖
compile 'com.squareup.okio:okio:1.5.0'
compile 'com.squareup.okhttp3:okhttp:3.2.0'
compile 'com.squareup.okhttp3:logging-interceptor:3.4.1'
compile 'com.google.code.gson:gson:2.8.2'
2.清单文件配置
3.导入utils里的工具类
首先创建Application类
public class MyApp extends Application {
public static MyApp mInstance;
@Override
public void onCreate() {
super.onCreate();
mInstance = this;
}
public static MyApp getInstance() {
return mInstance;
}
}
//2.导入以下四个四个工具类
// GsonArrayCallback类
public abstract class GsonArrayCallback
private Handler handler = OkHttp3Utils.getInstance().getHandler();
//主线程处理
public abstract void onUi(List
//主线程处理
public abstract void onFailed(Call call, IOException e);
//请求失败
@Override
public void onFailure(final Call call, final IOException e) {
handler.post(new Runnable() {
@Override
public void run() {
onFailed(call, e);
}
});
}
//请求json 并直接返回集合 主线程处理
@Override
public void onResponse(Call call, Response response) throws IOException {
final List
String json = response.body().string();
JsonArray array = new JsonParser().parse(json).getAsJsonArray();
Gson gson = new Gson();
Class
Class clz = this.getClass();
ParameterizedType type = (ParameterizedType) clz.getGenericSuperclass();
Type[] types = type.getActualTypeArguments();
cls = (Class
for(final JsonElement elem : array){
//循环遍历把对象添加到集合
mList.add((T) gson.fromJson(elem, cls));
}
handler.post(new Runnable() {
@Override
public void run() {
onUi(mList);
}
});
}
}
//GsonObjectCallback
public abstract class GsonObjectCallback
private Handler handler = OkHttp3Utils.getInstance().getHandler();
//主线程处理
public abstract void onUi(T t);
//主线程处理
public abstract void onFailed(Call call, IOException e);
//请求失败
@Override
public void onFailure(final Call call, final IOException e) {
handler.post(new Runnable() {
@Override
public void run() {
onFailed(call, e);
}
});
}
//请求json 并直接返回泛型的对象 主线程处理
@Override
public void onResponse(Call call, Response response) throws IOException {
String json = response.body().string();
Class
Class clz = this.getClass();
ParameterizedType type = (ParameterizedType) clz.getGenericSuperclass();
Type[] types = type.getActualTypeArguments();
cls = (Class
Gson gson = new Gson();
final T t = gson.fromJson(json, cls);
handler.post(new Runnable() {
@Override
public void run() {
onUi(t);
}
});
}
}
//NetWorkUtils
public class NetWorkUtils {
//判断网络是否连接
public static boolean isNetWorkAvailable(Context context) {
//网络连接管理器
ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
//网络信息
NetworkInfo info = connectivityManager.getActiveNetworkInfo();
if (info != null) {
return true;
}
return false;
}
}
//OkHttp3Utils
public class OkHttp3Utils {
/**
* 懒汉 安全 加同步
* 私有的静态成员变量 只声明不创建
* 私有的构造方法
* 提供返回实例的静态方法
*/
private static OkHttp3Utils okHttp3Utils = null;
private OkHttp3Utils() {
}
public static OkHttp3Utils getInstance() {
if (okHttp3Utils == null) {
//加同步安全
synchronized (OkHttp3Utils.class) {
if (okHttp3Utils == null) {
okHttp3Utils = new OkHttp3Utils();
}
}
}
return okHttp3Utils;
}
private static OkHttpClient okHttpClient = null;
public synchronized static OkHttpClient getOkHttpClient() {
if (okHttpClient == null) {
//判空 为空创建实例
// okHttpClient = new OkHttpClient();
/**
* 和OkHttp2.x有区别的是不能通过OkHttpClient直接设置超时时间和缓存了，而是通过OkHttpClient.Builder来设置，
* 通过builder配置好OkHttpClient后用builder.build()来返回OkHttpClient，
* 所以我们通常不会调用new OkHttpClient()来得到OkHttpClient，而是通过builder.build()：
*/
// File sdcache = getExternalCacheDir();
//缓存目录
File sdcache = new File(Environment.getExternalStorageDirectory(), "cache");
int cacheSize = 10 * 1024 * 1024;
//OkHttp3拦截器
HttpLoggingInterceptor httpLoggingInterceptor = new HttpLoggingInterceptor(new HttpLoggingInterceptor.Logger() {
@Override
public void log(String message) {
Log.i("xxx", message.toString());
}
});
//Okhttp3的拦截器日志分类 4种
httpLoggingInterceptor.setLevel(HttpLoggingInterceptor.Level.BODY);
okHttpClient = new OkHttpClient.Builder().connectTimeout(15, TimeUnit.SECONDS)
//添加OkHttp3的拦截器
.addInterceptor(httpLoggingInterceptor)
.addNetworkInterceptor(new CacheInterceptor())
.writeTimeout(20, TimeUnit.SECONDS).readTimeout(20, TimeUnit.SECONDS)
.cache(new Cache(sdcache.getAbsoluteFile(), cacheSize))
.build();
}
return okHttpClient;
}
private static Handler mHandler = null;
public synchronized static Handler getHandler() {
if (mHandler == null) {
mHandler = new Handler();
}
return mHandler;
}
/**
* get请求
* 参数1 url
* 参数2 回调Callback
*/
public static void doGet(String url, Callback callback) {
//创建OkHttpClient请求对象
OkHttpClient okHttpClient = getOkHttpClient();
//创建Request
Request request = new Request.Builder().url(url).build();
//得到Call对象
Call call = okHttpClient.newCall(request);
//执行异步请求
call.enqueue(callback);
}
/**
* post请求
* 参数1 url
* 参数2 回调Callback
*/
public static void doPost(String url, Map
//创建OkHttpClient请求对象
OkHttpClient okHttpClient = getOkHttpClient();
//3.x版本post请求换成FormBody 封装键值对参数
FormBody.Builder builder = new FormBody.Builder();
//遍历集合
for (String key : params.keySet()) {
builder.add(key, params.get(key));
}
//创建Request
Request request = new Request.Builder().url(url).post(builder.build()).build();
Call call = okHttpClient.newCall(request);
call.enqueue(callback);
}
/**
* post请求上传文件
* 参数1 url
* 参数2 回调Callback
*/
public static void uploadPic(String url, File file, String fileName) {
//创建OkHttpClient请求对象
OkHttpClient okHttpClient = getOkHttpClient();
//创建RequestBody 封装file参数
RequestBody fileBody = RequestBody.create(MediaType.parse("application/octet-stream"), file);
//创建RequestBody 设置类型等
RequestBody requestBody = new MultipartBody.Builder().setType(MultipartBody.FORM).addFormDataPart("file", fileName, fileBody).build();
//创建Request
Request request = new Request.Builder().url(url).post(requestBody).build();
//得到Call
Call call = okHttpClient.newCall(request);
//执行请求
call.enqueue(new Callback() {
@Override
public void onFailure(Call call, IOException e) {
}
@Override
public void onResponse(Call call, Response response) throws IOException {
//上传成功回调 目前不需要处理
}
});
}
/**
* Post请求发送JSON数据
* 参数一：请求Url
* 参数二：请求的JSON
* 参数三：请求回调
*/
public static void doPostJson(String url, String jsonParams, Callback callback) {
RequestBody requestBody = RequestBody.create(MediaType.parse("application/json; charset=utf-8"), jsonParams);
Request request = new Request.Builder().url(url).post(requestBody).build();
Call call = getOkHttpClient().newCall(request);
call.enqueue(callback);
}
/**
* 下载文件 以流的形式把apk写入的指定文件 得到file后进行安装
* 参数一：请求Url
* 参数二：保存文件的路径名
* 参数三：保存文件的文件名
*/
public static void download(final Context context, final String url, final String saveDir) {
Request request = new Request.Builder().url(url).build();
Call call = getOkHttpClient().newCall(request);
call.enqueue(new Callback() {
@Override
public void onFailure(Call call, IOException e) {
Log.i("xxx", e.toString());
}
@Override
public void onResponse(Call call, final Response response) throws IOException {
InputStream is = null;
byte[] buf = new byte[2048];
int len = 0;
FileOutputStream fos = null;
try {
is = response.body().byteStream();
//apk保存路径
final String fileDir = isExistDir(saveDir);
//文件
File file = new File(fileDir, getNameFromUrl(url));
fos = new FileOutputStream(file);
while ((len = is.read(buf)) != -1) {
fos.write(buf, 0, len);
}
fos.flush();
//apk下载完成后 调用系统的安装方法
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(Uri.fromFile(file), "application/vnd.android.package-archive");
context.startActivity(intent);
} catch (IOException e) {
e.printStackTrace();
} finally {
if (is != null) is.close();
if (fos != null) fos.close();
}
}
});
}
/**
* @param saveDir
* @return
* @throws IOException 判断下载目录是否存在
*/
public static String isExistDir(String saveDir) throws IOException {
// 下载位置
if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
File downloadFile = new File(Environment.getExternalStorageDirectory(), saveDir);
if (!downloadFile.mkdirs()) {
downloadFile.createNewFile();
}
String savePath = downloadFile.getAbsolutePath();
Log.e("savePath", savePath);
return savePath;
}
return null;
}
/**
* @param url
* @return 从下载连接中解析出文件名
*/
private static String getNameFromUrl(String url) {
return url.substring(url.lastIndexOf("/") + 1);
}
/**
* 为okhttp添加缓存，这里是考虑到服务器不支持缓存时，从而让okhttp支持缓存
*/
private static class CacheInterceptor implements Interceptor {
@Override
public Response intercept(Chain chain) throws IOException {
// 有网络时 设置缓存超时时间1个小时
int maxAge = 60 * 60;
// 无网络时，设置超时为1天
int maxStale = 60 * 60 * 24;
Request request = chain.request();
if (NetWorkUtils.isNetWorkAvailable(MyApp.getInstance())) {
//有网络时只从网络获取
request = request.newBuilder().cacheControl(CacheControl.FORCE_NETWORK).build();
} else {
//无网络时只从缓存中读取
request = request.newBuilder().cacheControl(CacheControl.FORCE_CACHE).build();
/* Looper.prepare();
Toast.makeText(MyApp.getInstance(), "走拦截器缓存", Toast.LENGTH_SHORT).show();
Looper.loop();*/
}
Response response = chain.proceed(request);
if (NetWorkUtils.isNetWorkAvailable(MyApp.getInstance())) {
response = response.newBuilder()
.removeHeader("Pragma")
.header("Cache-Control", "public, max-age=" + maxAge)
.build();
} else {
response = response.newBuilder()
.removeHeader("Pragma")
.header("Cache-Control", "public, only-if-cached, max-stale=" + maxStale)
.build();
}
return response;
}
}
}
//使用方法
public class MainActivity extends AppCompatActivity {
String url = "http://www.93.gov.cn/93app/data.do?";
String picUrl = "http://169.254.249.24:8080/08web/FileUploadServlet";
String apkPath = "http://d.988wan.com/zft/qmzft32_988wan_01.apk";
String apkUrl = "http://shouji.360tpcdn.com/160804/a05b75b7779f7a4afae83601c195ed2b/com.qihoo.haosou_708.apk";
private TextView tv, tv_result;
String uri = "https://api.github.com/repos/square/retrofit/contributors";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
tv = (TextView) findViewById(R.id.tv);
tv_result = (TextView) findViewById(R.id.tv_result);
boolean netWorkAvailable = NetWorkUtils.isNetWorkAvailable(this);
if (!netWorkAvailable) {
Toast.makeText(MainActivity.this, "联网：" + netWorkAvailable, Toast.LENGTH_SHORT).show();
}
getData();
// postData();
// postJson();
// uploadPic();
// downloadApk();
}
//get的请求
private void getData() {
OkHttp3Utils.getInstance().doGet(url, new GsonObjectCallback
@Override
public void onUi(User user) {
user.getData().get(0).getTITLE();
}
@Override
public void onFailed(Call call, IOException e) {
}
});
/* //封装回调传入对象 封装了Callback回调
OkHttp3Utils.getInstance().doGet(url + "channelId=" + 0 + "&startNum=" + 0, new GsonObjectCallback
@Override
public void onUi(User user) {
Log.i("aaa", user.getData().get(0).getTITLE());
tv.setText(user.getData().get(0).getTITLE());
}
@Override
public void onFailed(Call call, IOException e) {
}
});*/
//封装回调传入集合 封装了Callback回调
/* OkHttp3Utils.getInstance().doGet(uri, new GsonArrayCallback
@Override
public void onUi(List
Log.i("fff", list.toString());
String login = list.get(0).getLogin();
tv_result.setText(login);
}
@Override
public void onFailed(Call call, IOException e) {
}
});*/
//数据结构最外层是集合 封装了Callback回调
OkHttp3Utils.getInstance().doGet("http://mnews.gw.com.cn/wap/data/news/txs/page_1.json", new GsonArrayCallback
@Override
public void onUi(List
News news = list.get(0);
List
News.DataInfo dataInfo = data.get(0);
String title = dataInfo.getTitle();
tv_result.setText(title);
}
@Override
public void onFailed(Call call, IOException e) {
}
});
//没有封装Callback回调
/* OkHttp3Utils.getInstance().doGet(url + "channelId=" + 0 + "&startNum=" + 0, new Callback() {
@Override
public void onFailure(Call call, IOException e) {
}
@Override
public void onResponse(Call call, Response response) throws IOException {
//回调在子线程
Log.i("sss", response.body().string());
}
});*/
}
//post请求 键值对参数 String url = "http://www.93.gov.cn/93app/data.do?" + "channelId=" + 0 + "&startNum=" + 0;
private void postData() {
Map
params.put("channelId", "0");
params.put("startNum", "0");
OkHttp3Utils.doPost(url, params, new Callback() {
@Override
public void onFailure(Call call, IOException e) {
}
@Override
public void onResponse(Call call, Response response) throws IOException {
//回调在子线程
}
});
}
//Post发送JSON数据
private void postJson() {
String json = "{\n" +
" \"data\": [\n" +
" {\n" +
" \"title\": \"少林寺\",\n" +
" \"url\": \"http://pic67.nipic.com/file/20150514/21036787_181947848862_2.jpg\"\n" +
" },\n" +
" {\n" +
" \"title\": \"武当\",\n" +
" \"url\": \"http://c.hiphotos.baidu.com/zhidao/pic/item/1f178a82b9014a909461e9baa1773912b31bee5e.jpg\"\n" +
" }\n" +
" ]\n" +
"}";
OkHttp3Utils.doPostJson("", json, new Callback() {
@Override
public void onFailure(Call call, IOException e) {
}
@Override
public void onResponse(Call call, Response response) throws IOException {
}
});
}
//图片上传
private void uploadPic() {
File file = new File(Environment.getExternalStorageDirectory(), "a.jpg");
String fileName = "a.jpg";
OkHttp3Utils.uploadPic(picUrl, file, fileName);
}
//文件下载apk
private void downloadApk() {
String saveDir = "app";
OkHttp3Utils.download(this, apkPath, saveDir);
}
//其它看需求
}