首先我們先寫一個攔截器
package com.bwey.text.util;
import android.os.Build;
import android.util.Log;
import com.google.gson.Gson;
import java.io.IOException;
import java.util.logging.Logger;
import okhttp3.Interceptor;
import okhttp3.Request;
import okhttp3.Response;
/**
* 網絡攔截器
*/
public class LoggingInterceptor implements Interceptor {
private static final String UA = "User-Agent";
@Override
public Response intercept(Chain chain) throws IOException {
Request request = chain.request()
.newBuilder()
.addHeader(UA, makeUA())
.build();
return chain.proceed(request);
}
private String makeUA() {
String s = Build.BRAND + "/" + Build.MODEL + "/" + Build.VERSION.RELEASE;
return Build.BRAND + "/" + Build.MODEL + "/" + Build.VERSION.RELEASE;
}
}
然後我們在OkHttp中加入添加我們的攔截器package com.bwey.text.util;
import android.os.Handler;
import android.os.Looper;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;
import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.FormBody;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.RequestBody;
import okhttp3.Response;
public class OkHttp {
/**
* 靜態實例
*/
private static OkHttp sOkHttpManager;
/**
* okhttpclient實例
*/
private OkHttpClient mClient;
/**
* 因爲我們請求數據一般都是子線程中請求,在這裏我們使用了handler
*/
private Handler mHandler;
/**
* 構造方法
*/
private OkHttp() {
mClient = new OkHttpClient.Builder()
//添加攔截器
.addInterceptor(new LoggingInterceptor())
.build();
/**
* 在這裏直接設置連接超時.讀取超時,寫入超時
*/
mClient.newBuilder().connectTimeout(10, TimeUnit.SECONDS);
mClient.newBuilder().readTimeout(10, TimeUnit.SECONDS);
mClient.newBuilder().writeTimeout(10, TimeUnit.SECONDS);
/**
* 初始化handler
*/
mHandler = new Handler(Looper.getMainLooper());
}
/**
* 單例模式 獲取OkHttp實例
*
* @return
*/
public static OkHttp getInstance() {
if (sOkHttpManager == null) {
sOkHttpManager = new OkHttp();
}
return sOkHttpManager;
}
//-------------------------同步的方式請求數據--------------------------
/**
* 對外提供的get方法,同步的方式
*
* @param url 傳入的地址
* @return
*/
public static Response getSync(String url) {
//通過獲取到的實例來調用內部方法
return sOkHttpManager.inner_getSync(url);
}
/**
* GET方式請求的內部邏輯處理方式,同步的方式
*
* @param url
* @return
*/
private Response inner_getSync(String url) {
Request request = new Request.Builder().url(url).build();
Response response = null;
try {
//同步請求返回的是response對象
response = mClient.newCall(request).execute();
} catch (IOException e) {
e.printStackTrace();
}
return response;
}
/**
* 對外提供的同步獲取String的方法
*
* @param url
* @return
*/
public static String getSyncString(String url) {
return sOkHttpManager.inner_getSyncString(url);
}
/**
* 同步方法
*/
private String inner_getSyncString(String url) {
String result = null;
try {
/**
* 把取得到的結果轉爲字符串,這裏最好用string()
*/
result = inner_getSync(url).body().string();
} catch (IOException e) {
e.printStackTrace();
}
return result;
}
//-------------------------異步的方式請求數據--------------------------
public static void getAsync(String url, DataCallBack callBack) {
getInstance().inner_getAsync(url, callBack);
}
/**
* 內部邏輯請求的方法
*
* @param url
* @param callBack
* @return
*/
private void inner_getAsync(String url, final DataCallBack callBack) {
final Request request = new Request.Builder().url(url).build();
mClient.newCall(request).enqueue(new Callback() {
@Override
public void onFailure(Call call, IOException e) {
deliverDataFailure(request, e, callBack);
}
@Override
public void onResponse(Call call, Response response) throws IOException {
String result = null;
try {
result = response.body().string();
} catch (IOException e) {
deliverDataFailure(request, e, callBack);
}
deliverDataSuccess(result, callBack);
}
});
}
/**
* 分發失敗的時候調用
*
* @param request
* @param e
* @param callBack
*/
private void deliverDataFailure(final Request request, final IOException e, final DataCallBack callBack) {
/**
* 在這裏使用異步處理
*/
mHandler.post(new Runnable() {
@Override
public void run() {
if (callBack != null) {
callBack.requestFailure(request, e);
}
}
});
}
/**
* 分發成功的時候調用
*
* @param result
* @param callBack
*/
private void deliverDataSuccess(final String result, final DataCallBack callBack) {
/**
* 在這裏使用異步線程處理
*/
mHandler.post(new Runnable() {
@Override
public void run() {
if (callBack != null) {
try {
callBack.requestSuccess(result);
} catch (Exception e) {
e.printStackTrace();
}
}
}
});
}
/**
* 數據回調接口
*/
public interface DataCallBack {
void requestFailure(Request request, IOException e);
void requestSuccess(String result) throws Exception;
}
//-------------------------提交表單--------------------------
public static void postAsync(String url, Map<String, String> params, DataCallBack callBack) {
getInstance().inner_postAsync(url, params, callBack);
}
private void inner_postAsync(String url, Map<String, String> params, final DataCallBack callBack) {
RequestBody requestBody = null;
if (params == null) {
params = new HashMap<>();
}
/**
* 如果是3.0之前版本的,構建表單數據是下面的一句
*/
//FormEncodingBuilder builder = new FormEncodingBuilder();
/**
* 3.0之後版本
*/
FormBody.Builder builder = new FormBody.Builder();
/**
* 在這對添加的參數進行遍歷,map遍歷有四種方式,如果想要了解的可以網上查找
*/
for (Map.Entry<String, String> map : params.entrySet()) {
String key = map.getKey().toString();
String value = null;
/**
* 判斷值是否是空的
*/
if (map.getValue() == null) {
value = "";
} else {
value = map.getValue();
}
/**
* 把key和value添加到formbody中
*/
builder.add(key, value);
}
requestBody = builder.build();
//結果返回
// 請求對象
final Request request = new Request.Builder().url(url).post(requestBody).build();
mClient.newCall(request).enqueue(new Callback() {
@Override
public void onFailure(Call call, IOException e) {
deliverDataFailure(request, e, callBack);
}
@Override
public void onResponse(Call call, Response response) throws IOException {
String result = response.body().string();
deliverDataSuccess(result, callBack);
}
});
}
//-------------------------文件下載--------------------------
public static void downloadAsync(String url, String desDir, DataCallBack callBack) {
getInstance().inner_downloadAsync(url, desDir, callBack);
}
/**
* 下載文件的內部邏輯處理類
*
* @param url 下載地址
* @param desDir 目標地址
* @param callBack
*/
private void inner_downloadAsync(final String url, final String desDir, final DataCallBack callBack) {
final Request request = new Request.Builder().url(url).build();
mClient.newCall(request).enqueue(new Callback() {
@Override
public void onFailure(Call call, IOException e) {
deliverDataFailure(request, e, callBack);
}
@Override
public void onResponse(Call call, Response response) throws IOException {
/**
* 在這裏進行文件的下載處理
*/
InputStream inputStream = null;
FileOutputStream fileOutputStream = null;
try {
//文件名和目標地址
File file = new File(desDir, getFileName(url));
//把請求回來的response對象裝換爲字節流
inputStream = response.body().byteStream();
fileOutputStream = new FileOutputStream(file);
int len = 0;
byte[] bytes = new byte[2048];
//循環讀取數據
while ((len = inputStream.read(bytes)) != -1) {
fileOutputStream.write(bytes, 0, len);
}
//關閉文件輸出流
fileOutputStream.flush();
//調用分發數據成功的方法
deliverDataSuccess(file.getAbsolutePath(), callBack);
} catch (IOException e) {
//如果失敗,調用此方法
deliverDataFailure(request, e, callBack);
e.printStackTrace();
} finally {
if (inputStream != null) {
inputStream.close();
}
if (fileOutputStream != null) {
fileOutputStream.close();
}
}
}
});
}
/**
* 根據文件url獲取文件的路徑名字
*
* @param url
* @return
*/
private String getFileName(String url) {
int separatorIndex = url.lastIndexOf("/");
String path = (separatorIndex < 0) ? url : url.substring(separatorIndex + 1, url.length());
return path;
}
}
不要忘記導入OkHttp的依賴