Hi,

Before you continue to study the code, you need to know the Java
language more. Go find a Java book and study it first.


On 3月17日, 上午10時24分, a a <[email protected]> wrote:
> Dear All,
>
> I am now reading contentProvider.java( under the 
> base/core/java/android/content)
>
> Ln 127 looks following:
>
>         public Cursor query(Uri uri, String[] projection,
>                 String selection, String[] selectionArgs, String sortOrder) {
>             enforceReadPermission(uri);
>             return ContentProvider.this.query(uri, projection, selection,
>                     selectionArgs, sortOrder);
>         }
>
> I'm really confused about that contentProvider invoke this.query()
>
> Ln 444
>     public abstract Cursor query(Uri uri, String[] projection,
>             String selection, String[] selectionArgs, String sortOrder);
>
> Ln444 is Nothing to do the query(....), it seams this is only declare,
> not yet implement.
>
> where is it implement?  How can i find it? anyone can tell me?

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