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android handler abstract err

 Android使用Handler进行实例化(new)时, 如:private Handler handler = new Handler();
    会报错Handler is abstract, cannot be instantiated., 提示使用, 其他实例化方式.

    原因:导入(import)库发生错误, 使用Android的句柄(handler)库, 不是java的句柄库;
    使用import android.os.Handler;代替 import java.util.logging.Handler;

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