我想用ontouch事件显示放置在视图上的节点的坐标,坐标放在圆形节点旁边,暂时我正在使用(0,0)但是我不知道如何正确实现节点上的真实坐标,需要一些帮助。谢谢
public class DrawView extends View implements OnTouchListener {
List<Point> points = new ArrayList<Point>();
Paint paint = new Paint();
public DrawView(Draw context) {
super(context);
setFocusable(true);
setFocusableInTouchMode(true);
this.setOnTouchListener(this);
paint.setColor(Color.RED);
paint.setAntiAlias(true);
}
@Override
public void onDraw(Canvas canvas) {
Paint rectanglePaint = new Paint();
rectanglePaint.setColor(Color.WHITE);
Paint layoutColor = new Paint();
layoutColor.setColor(Color.BLACK);
canvas.drawRect(new Rect(10,10,465,800), rectanglePaint);
canvas.drawLine(300, 10, 300, 800, layoutColor);
canvas.drawLine(0, 300, 465, 300, layoutColor);
// Paint textPaint = new Paint();
// textPaint.setColor(Color.CYAN);
// textPaint.setTextSize(30);
// canvas.drawText("Room", 220, 400, textPaint);
for (Point point : points) {
canvas.drawText("(0,0)", point.x+5, point.y+5, paint);
canvas.drawCircle(point.x, point.y, 5, paint);
// Log.d(TAG, "Painting: "+point);
}
}
final TextView textView = ( TextView )findViewById(R.id.textView1);
public boolean onTouch(View view, MotionEvent event) {
// return super.onTouchEvent(event);
Point point = new Point();
point.x = event.getX();
point.y = event.getY();
points.add(point);
invalidate();
return true;
}
}
答案 0 :(得分:0)
啊,你真的没有关于android的问题。你有一个java问题。您想知道如何将浮点数转换为字符串。
此链接将向您显示您需要知道的所有内容:http://download.oracle.com/javase/tutorial/java/data/converting.html
String s = "(" + point.x + "," + point.y + ")";