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How to declare cursor as global variable

i have two classes,MainActivity.java and ImageAdapter.java i have declared cursor in main activity like this

public  Cursor cursor;

now i want to access that variable 'cursor' in my second class named imageAdapter.java.How it will be possible in good way guys?

Solution

  • If your ImageAdapter extends CursorAdapter then use in MainActivity

    adapter.swapCursor(yourCursor);

    and in ImageAdapter then call getCursor()

    If ImageAdapter is not extended from CursorAdapter, then you can implement set methods in it.

    private Cursor cursor;

public void setCursor(Cursor cursor){
    this.cursor = cursor;
}

    And set it in MainActivity like imageAdapter.setCursor(yourCursor);

    This is usually better from OOP perspective than declaring cursor in MainActivity as static or creating your ImageAdapter dependant from MainActivity.