The method ???? of type Fundamentals must override a superclass

 
"......The method onAccuracyChanged(Sensor, int) of type Fundamentals must override a superclass......" 

"......The method onClick(View) of type new View.OnClickListener(){} must override a superclass...... "

“......The method onSensorChanged(SensorEvent) of type Fundamentals must override a superclass......”

解決辦法：

是JDK版本問題，將Project->Properties->Java Compiler->Compilier compiance level，重啟，就沒有錯誤提示了。