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本文详细解析了Java中加载目录分区的关键函数实现，包括强制加载与延迟加载的逻辑处理，以及如何根据不同目录ID选择合适的加载策略。

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<pre name="code" class="java">关键函数：
511    private void startLoadingDirectoryPartition(int partitionIndex) {
512        DirectoryPartition partition = (DirectoryPartition)mAdapter.getPartition(partitionIndex);
513        partition.setStatus(DirectoryPartition.STATUS_LOADING);
514        long directoryId = partition.getDirectoryId();
515        if (mForceLoad) {
              //一直调用if语句，没有调用else，应该调用else就可以利用<pre name="code" class="java">                延时读取队列来修复
516            if (directoryId == Directory.DEFAULT) {
517                loadDirectoryPartition(partitionIndex, partition);
518            } else {
519                loadDirectoryPartitionDelayed(partitionIndex, partition);
520            }
521        } else {
522            Bundle args = new Bundle();
523            args.putLong(DIRECTORY_ID_ARG_KEY, directoryId);
524            getLoaderManager().initLoader(partitionIndex, args, this);
525        }
526    }

逻辑调用：
private static final int DIRECTORY_SEARCH_MESSAGE = 1; private void loadDirectoryPartitionDelayed(int partitionIndex, DirectoryPartition partition) { mDelayedDirectorySearchHandler.removeMessages(DIRECTORY_SEARCH_MESSAGE, partition); Message msg = mDelayedDirectorySearchHandler.obtainMessage( DIRECTORY_SEARCH_MESSAGE, partitionIndex, 0, partition); mDelayedDirectorySearchHandler.sendMessageDelayed(msg, DIRECTORY_SEARCH_DELAY_MILLIS); } private Handler mDelayedDirectorySearchHandler = new Handler() { @Override public void handleMessage(Message msg) { if (msg.what == DIRECTORY_SEARCH_MESSAGE) { loadDirectoryPartition(msg.arg1, (DirectoryPartition) msg.obj); } } };