@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
if (resultCode == Activity.RESULT_OK && requestCode == STORY_REQUEST_CODE) {
LogUtil.w("Latest---onActivityResult");
// 如果是已读的话，更新整个数据源
if (mClickItemPosition != -1) {
View view =
mStoryList.getChildAt(mClickItemPosition - mStoryList.getFirstVisiblePosition());
TextView txtView = (TextView) view.findViewById(R.id.title_story);
txtView.setTextColor(Color.GRAY);
}
}
}
@Override
@SuppressWarnings("unchecked")
protected ResultType doBackground() throws Throwable {
if (this.isCancelled()) {
throw new Callback.CancelledException("cancelled before request");
}
// 初始化请求参数
ResultType result = null;
boolean retry = true;
int retryCount = 0;
Throwable exception = null;
HttpRetryHandler retryHandler = new HttpRetryHandler(this.params.getMaxRetryCount());
request = initRequest();
if (this.isCancelled()) {
throw new Callback.CancelledException("cancelled before request");
}
// 检查缓存
Object cacheResult = null;
if (cacheCallback != null && HttpMethod.permitsCache(params.getMethod())) {
// 尝试从缓存获取结果, 并为请求头加入缓存控制参数.
while (retry) {
try {
clearRawResult();
rawResult = this.request.loadResultFromCache();
break;
} catch (Throwable ex) {
LogUtil.w("load disk cache error", ex);
exception = ex;
retry = retryHandler.retryRequest(ex, ++retryCount, this.request);
}
}
if (this.isCancelled()) {
clearRawResult();
throw new Callback.CancelledException("cancelled before request");
}
if (rawResult != null) {
if (prepareCallback != null) {
try {
cacheResult = prepareCallback.prepare(rawResult);
} catch (Throwable ex) {
cacheResult = null;
LogUtil.w("prepare disk cache error", ex);
} finally {
clearRawResult();
}
} else {
cacheResult = rawResult;
}
if (this.isCancelled()) {
throw new Callback.CancelledException("cancelled before request");
}
if (cacheResult != null) {
// 同步等待是否信任缓存
this.update(FLAG_CACHE, cacheResult);
while (trustCache == null) {
synchronized (cacheLock) {
try {
cacheLock.wait();
} catch (Throwable ignored) {
}
}
}
// 处理完成
if (trustCache) {
return null;
}
}
}
}
if (trustCache == null) {
trustCache = false;
}
if (cacheResult == null) {
this.request.clearCacheHeader();
}
// 发起请求
retry = true;
while (retry) {
try {
if (this.isCancelled()) {
throw new Callback.CancelledException("cancelled before request");
}
// 由loader发起请求, 拿到结果.
this.request.close(); // retry 前关闭上次请求
try {
clearRawResult();
requestWorker = new RequestWorker(this.request, this.loadType);
if (params.isCancelFast()) {
requestWorker.start();
requestWorker.join();
} else {
requestWorker.run();
}
if (requestWorker.ex != null) {
throw requestWorker.ex;
}
rawResult = requestWorker.result;
} catch (Throwable ex) {
clearRawResult();
if (this.isCancelled()) {
throw new Callback.CancelledException("cancelled during request");
} else {
throw ex;
}
}
if (prepareCallback != null) {
try {
result = (ResultType) prepareCallback.prepare(rawResult);
} finally {
clearRawResult();
}
} else {
result = (ResultType) rawResult;
}
// 保存缓存
if (cacheCallback != null && HttpMethod.permitsCache(params.getMethod())) {
this.request.save2Cache();
}
retry = false;
if (this.isCancelled()) {
throw new Callback.CancelledException("cancelled after request");
}
} catch (Throwable ex) {
if (this.request.getResponseCode() == 304) { // disk cache is valid.
return null;
} else {
exception = ex;
retry = retryHandler.retryRequest(ex, ++retryCount, this.request);
}
}
}
if (exception != null && result == null && !trustCache) {
throw exception;
}
return result;
}