private static RequestQueue newRequestQueue(Context context) {
Proxy proxy = NetUtil.getProxy();
File cacheDir =
new File(DirectoryManager.getDirectory(DirectoryManager.DIR.CACHE), DEFAULT_CACHE_DIR);
String userAgent = "CGTong/0";
try {
String packageName = context.getPackageName();
PackageInfo info = context.getPackageManager().getPackageInfo(packageName, 0);
userAgent = packageName + "/" + info.versionCode;
} catch (PackageManager.NameNotFoundException e) {
return null;
}
if (Build.VERSION.SDK_INT >= 9) {
stack = new HurlStack(proxy);
} else {
// Prior to Gingerbread, HttpUrlConnection was unreliable.
// See:
// http://android-developers.blogspot.com/2011/09/androids-http-clients.html
AndroidHttpClient client = AndroidHttpClient.newInstance(userAgent);
if (proxy != null) {
client.getParams().setParameter(ConnRoutePNames.DEFAULT_PROXY, proxy);
}
stack = new HttpClientStack(client);
}
Network network = new BasicNetwork(stack);
final DiskBasedCache diskCache = new DiskBasedCache(cacheDir);
// 监听目录的变化，切换cache目录
DirectoryManager.addSdCardListener(
new DirectoryManager.SdcardStatusListener() {
@Override
public void onChange(SDCARD_STATUS status) {
new Thread(
new Runnable() {
@Override
public void run() {
diskCache.switchCache(
new File(
DirectoryManager.getDirectory(DirectoryManager.DIR.CACHE),
DEFAULT_CACHE_DIR));
}
})
.start();
}
});
RequestQueue queue = new RequestQueue(diskCache, network);
// RequestQueue queue = Volley.newRequestQueue(context);
queue.start();
return queue;
}
public static <T> T getCacheFile(InputBase input, Class<T> clazz) {
Cache cache = requestQueue.getCache();
Request<T> request =
new GsonRequest<T>(input.method(), input.toString(), "", clazz, null, null, null, null);
Cache.Entry entry = cache.get(request.getCacheKey());
if (entry != null) {
try {
String json = new String(entry.data, "UTF-8");
if (clazz == String.class) {
return (T) json;
}
// File类型写文件后返回file对象
else if (clazz == File.class) {
String fileName = TextUtil.md5(input.toString());
File outFile =
new File(DirectoryManager.getDirectory(DirectoryManager.DIR.DATA), fileName);
FileUtils.writeFile(outFile.getAbsolutePath(), entry.data);
return (T) outFile;
}
// 替换服务端可能返回的错误的data格式
json = json.replace("\"data\":[]", "\"data\":{}");
// 服务器返回errNo=0
if (json.matches(ERROR_NO_0_EXPRESSION)) {
T data;
JSONObject jsonObject = new JSONObject(json);
json = jsonObject.getString("data");
// 其他属于Gson请求，解析对象返回
Gson gson = GsonUtil.createBuilder();
data = (T) gson.fromJson(json, clazz);
return data;
}
// 服务器返回errNo != 0
else {
return null;
}
} catch (Exception e) {
return null;
}
}
return null;
}