android SharedPreferences 线程安全和进程安全 

官方文档明确指出，SharedPreferences不支持多线程，进程也是不安全的
如果想要实现线程安全需重新实现其接口，如下：
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private static final class SharedPreferencesImpl implements SharedPreferences {
...
    public String getString(String key, String defValue) {
        synchronized (this) {
            String v = (String)mMap.get(key);
            return v != null ? v : defValue;
        }
   }
...
    public final class EditorImpl implements Editor {
        public Editor putString(String key, String value) {
            synchronized (this) {
                mModified.put(key, value);
                return this;
            }
        }
    ...
    }
}
posted @ 2019-07-01 18:05  天涯海角路  阅读(1124)  评论(0)    收藏  举报