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);
- }