I'm passing data to a Handler for drawing in the UI thread. On of the
pieces of code below. The DrawPolygon function is called from my code,
and has the right data for the three calls. The DrawPolygonHandler
however is executed three times but each time with the data for the last
call.
Am I missing something obvious ?
Danny
class PolygonData {
int count;
int filled;
float[] points;
};
Handler DrawPolygonHandler = new Handler() {
@Override
public void handleMessage(Message msg) {
PolygonData p = (PolygonData)msg.obj;
float[] points = p.points;
int filled = msg.what,
count = msg.arg1;
Log.e("RoadMap", "DrawPolygonHandler {"
+ msg
+ "} count " + count + " filled
" + filled);
Log.e("RoadMap", "DPHandler point 0 {"
+ p.points[0] + "," +
p.points[1] + "}");
try {
int i;
Canvas canvas =
getHolder().lockCanvas();
paint = pen.GetPaint();
if (filled == 1)
paint.setStyle(Paint.Style.FILL_AND_STROKE);
else
paint.setStyle(Paint.Style.STROKE);
Path path = new Path();
Log.e("RoadMap", "Polygon pt 0 [" +
points[0] + "," + points[1] + "]");
path.moveTo(points[0], points[1]);
for (i=2; i<2*count; i+=2) {
path.lineTo(points[i], points[i
+1]);
Log.e("RoadMap", "Polygon pt " +
i + " ["
+ points[i] +
"," + points[i+1] + "]");
}
path.close();
canvas.drawPath(path, paint);
getHolder().unlockCanvasAndPost(canvas);
} catch (Exception e) {
Log.e("RoadMap", "Exception " + e + " in
DrawPolygon");
}
}
};
public void DrawPolygon(int filled, int count, float[] points)
{
PolygonData p = new PolygonData();
p.count = count;
p.filled = filled;
p.points = points;
Message m = DrawPolygonHandler.obtainMessage();
m.what = filled;
m.arg1 = count;
m.arg2 = 0;
m.obj = (Object)p;
DrawPolygonHandler.sendMessage(m);
Log.e("RoadMap", "DrawPolygon {"
+ m
+ "} count " + count +
", first point [" + points[0] + "," +
points[1] + "]");
}
E/RoadMap ( 5782): draw_polygon - line 0 has 4 points
E/RoadMap ( 5782): - line 0 point 0 - 10 95
E/RoadMap ( 5782): - line 0 point 1 - 17 88
E/RoadMap ( 5782): - line 0 point 2 - 20 95
E/RoadMap ( 5782): - line 0 point 3 - 18 97
E/RoadMap ( 5782): draw_polygon - line 1 has 4 points
E/RoadMap ( 5782): - line 1 point 0 - 25 100
E/RoadMap ( 5782): - line 1 point 1 - 32 103
E/RoadMap ( 5782): - line 1 point 2 - 25 110
E/RoadMap ( 5782): - line 1 point 3 - 22 103
E/RoadMap ( 5782): draw_polygon - line 2 has 4 points
E/RoadMap ( 5782): - line 2 point 0 - 25 90
E/RoadMap ( 5782): - line 2 point 1 - 30 95
E/RoadMap ( 5782): - line 2 point 2 - 20 105
E/RoadMap ( 5782): - line 2 point 3 - 15 100
E/RoadMap ( 5782): DrawPolygon {{ what=1 when=143096293 arg1=4
obj=net.sourceforge.projects.roadmap.panel$polygond...@43de5ca8 }} count
4, first point [10.0,95.0]
E/RoadMap ( 5782): DrawPolygon {{ what=1 when=143096295 arg1=4
obj=net.sourceforge.projects.roadmap.panel$polygond...@43de6ce8 }} count
4, first point [25.0,100.0]
E/RoadMap ( 5782): DrawPolygon {{ what=1 when=143096297 arg1=4
obj=net.sourceforge.projects.roadmap.panel$polygond...@43de7a88 }} count
4, first point [25.0,90.0]
E/RoadMap ( 5782): DrawPolygonHandler {{ what=1 when=143096293 arg1=4
obj=net.sourceforge.projects.roadmap.panel$polygond...@43de5ca8 }} data
{net.sourceforge.projects.roadmap.panel$polygond...@43de5ca8} count 4
filled 1
E/RoadMap ( 5782): DPHandler point 0 {25.0,90.0}
E/RoadMap ( 5782): Polygon pt 0 [25.0,90.0]
E/RoadMap ( 5782): Polygon pt 2 [30.0,95.0]
E/RoadMap ( 5782): Polygon pt 4 [20.0,105.0]
E/RoadMap ( 5782): Polygon pt 6 [15.0,100.0]
E/RoadMap ( 5782): DrawPolygonHandler {{ what=1 when=143096295 arg1=4
obj=net.sourceforge.projects.roadmap.panel$polygond...@43de6ce8 }} data
{net.sourceforge.projects.roadmap.panel$polygond...@43de6ce8} count 4
filled 1
E/RoadMap ( 5782): DPHandler point 0 {25.0,90.0}
E/RoadMap ( 5782): Polygon pt 0 [25.0,90.0]
E/RoadMap ( 5782): Polygon pt 2 [30.0,95.0]
E/RoadMap ( 5782): Polygon pt 4 [20.0,105.0]
E/RoadMap ( 5782): Polygon pt 6 [15.0,100.0]
E/RoadMap ( 5782): DrawPolygonHandler {{ what=1 when=143096297 arg1=4
obj=net.sourceforge.projects.roadmap.panel$polygond...@43de7a88 }} data
{net.sourceforge.projects.roadmap.panel$polygond...@43de7a88} count 4
filled 1
E/RoadMap ( 5782): DPHandler point 0 {25.0,90.0}
E/RoadMap ( 5782): Polygon pt 0 [25.0,90.0]
E/RoadMap ( 5782): Polygon pt 2 [30.0,95.0]
E/RoadMap ( 5782): Polygon pt 4 [20.0,105.0]
E/RoadMap ( 5782): Polygon pt 6 [15.0,100.0]
--
Danny Backx ; danny.backx - at - scarlet.be ; http://danny.backx.info
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