ListView Display and File to Uri

How can adapter display the content of the listview.

1.AbsListView.java

protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
  .......
  final View child = obtainView(0, mIsScrap);
  .....
}

//one item, called one time.
2.AbsListView.java

    View obtainView(int position, boolean[] isScrap) {
....
child = mAdapter.getView(position, scrapView, this);
....
}

3.CursorAdapter.java

    public View getView(int position, View convertView, ViewGroup parent) {
        .....
        if (convertView == null) {
            v = newView(mContext, mCursor, parent);
        } else {
            v = convertView;
        }
        bindView(v, mContext, mCursor);
        return v;
    }

4.CursorAdapter.java

public abstract void bindView(View view, Context context, Cursor cursor);

public abstract View newView(Context context, Cursor cursor, ViewGroup parent);

 

//so override the the bindView and newView. and we just need the return the item view not the listview. 

all adapters getView

View getView(int position, View convertView, ViewGroup parent);

so for what adapter, we just need to return one item's view.

 

file to url

public static Uri fromFile(File file) {
    if (file == null) {
        throw new NullPointerException("file");
    }

    PathPart path = PathPart.fromDecoded(file.getAbsolutePath());
    return new HierarchicalUri(
            "file", Part.EMPTY, path, Part.NULL, Part.NULL);
}