Eclipse Error Data Backup

One

Error initializing control in eclipse

in the add TextView mytextview= (TextView) this. Findviewbyid (R.id.mytextview); Button MyButton= (button)this. Findviewbyid (R.id.mybutton); When, occurs "TextView Cannot is resolved to a type "error, after adding import Android.widget.button;import Android.widget.TextView at the beginning; +ctrl+o

Two

  @Override is pseudo-code, which means rewriting (and of course not writing), but the following benefits are written:  1   2  , the compiler can give you to verify @override the following method name is all in your parent class, if there is no error such as if you did not write @override and your method name is wrong, At this point your compiler is able to pass (it thinks this method is an added method of your subclass) Example: When overriding the OnCreate of the parent class, adding the @override system in front of the method can help you check the correctness of the method. For example,  public  void   OnCreate (Bundle savedinstancestate) {...} This is the correct wording if you write public  void   OnCreate (Bundle savedinstancestate) {...} so the compiler returns the following error--the method OnCreate ( Bundle) of type HelloWorld must  override   or Implement a Supertype method to ensure that you correctly rewrite the OnCreate methods. (because oncreate should be oncreate) and if you do not add @override, the compiler will not detect errors, but will assume you have a new method OnCreate defined. 

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