0002-gc-watcher.asc

GC Watcher

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文章更新历史：

• 2015/01/30 文章发布

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在看Android Framework源码时发现的一小段有意思的代码，涉及到几个有意思的知识点。

代码整理如下（来自类com.android.internal.os.BinderInternal）：

public class GcWatcher {
    static WeakReference<GcWatcher> mGcWatcher
            = new WeakReference<GcWatcher>(new GcWatcher());
    static long mLastGcTime;

    private GcWatcher() {
        // nothing to do
    }

    public static void setupWatcher() {
        // nothing to do
    }

    @Override
    protected void finalize() throws Throwable {
        super.finalize();
        mLastGcTime = System.currentTimeMillis();
        mGcWatcher = new WeakReference<GcWatcher>(new GcWatcher());
    }
}