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Hasiy/Java 4种引用

Created November 7, 2019 05:32
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Java 4种引用
SoftReference<Bitmap> 软引用对象
WeakReference<ImageView> 弱引用对象
强引用： 普通变量都属于强引用，比如 private Context context;
软引用： SoftReference，在发生OOM之前，垃圾回收器会回收SoftReference引用的对象。
弱引用： WeakReference，发生GC的时候，垃圾回收器会回收WeakReference中的对象。
虚引用： 随时会被回收，没有使用场景。
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