I'm trying to make and android app with some dynamically drawn views. Currently, the only thing the views draw is a circle in the middle of the view.
The views are inside a grid view, but it doesn't seem to be drawing them right.
This is what happens when I load the screen:
The orange block is the view in the grid view that has the focus.
However, if I use my finger (or mouse) to drag along the view, it gets painted correctly:
Why is this?
How can I make it draw the second image all the time.
Here is the code I'm using:
public class ChooseTablePanel extends GamePanel {
TableAdapter adapter;
public ChooseTablePanel(Context context, GamePanel nextPanel,
GamePanel failurePanel) {
super(context, nextPanel, failurePanel);
initialize();
}
public ChooseTablePanel(Context context, AttributeSet attrs,
GamePanel nextPanel, GamePanel failurePanel) {
super(context, attrs, nextPanel, failurePanel);
initialize();
}
private void initialize() {
adapter = new TableAdapter(getContext());
adapter.setTables(new int[] {5,4,3,2,1,6});
GridView gridView = new GridView(getContext());
gridView.setAdapter(adapter);
gridView.setNumColumns(adapter.getCount()/3);
this.addView(gridView);
this.invalidate();
}
class TableAdapter extends BaseAdapter {
private Context context;
private TableView[] tables;
public TableAdapter(Context context) {
this.context = context;
}
public void setTables(int[] tables) {
this.tables = new TableView[tables.length];
for(int i = 0; i < tables.length; i++){
this.tables[i] = new TableView(tables[i], context);
}
}
public int getCount() {
return tables.length;
}
public Object getItem(int position) {
return tables[position];
}
public long getItemId(int position) {
// TODO Auto-generated method stub
return 0;
}
public View getView(int position, View convertView, ViewGroup parent) {
TableView tableView;
if (convertView == null) { // if it's not recycled, initialize some attributes
tableView = new TableView(1, this.context);
tableView.setLayoutParams(new GridView.LayoutParams(85, 85));
tableView.setPadding(8, 8, 8, 8);
} else {
tableView = (TableView) convertView;
}
tableView.invalidate();
return tableView;
}
}
class TableView extends View {
private int seats;
public TableView(int Seats, Context context) {
super(context);
this.seats = Seats;
if(seats < 1){
throw new IllegalArgumentException("Number of seats must be greater than one.");
}
}
public int getSeats() {
return seats;
}
@Override
protected void onDraw(Canvas canvas){
int tableWidth = canvas.getWidth() / 2;
ShapeDrawable tableShape = new ShapeDrawable(new OvalShape());
tableShape.setBounds(canvas.getWidth()/2 - tableWidth/2, canvas.getHeight()/2 - tableWidth/2, canvas.getWidth()/2 + tableWidth/2, canvas.getHeight()/2 + tableWidth/2 );
tableShape.draw(canvas);
canvas.drawText(seats + "", 0, 0, new Paint());
}
}
}
Instead of using canvas.getWidth()
and canvas.getHeight()
try using this.getWidth()
and this.getHeight()
.
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