Hi all,
I'm relatively new to Android. I want to draw strokes on my screen when the
user touches. Next stroke should be drawn from the end point of the previous
stroke.
This is my code. What happens here is just only the current stroke is drawn.
Previous strokes are vanished? What is wrong here? Please help..
package src.test;
import android.app.Activity;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.os.Bundle;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;
public class ActDraw extends Activity implements OnTouchListener {
float x = 200;
float y = 200;
float x1 = 10;
float y1 = 45;
float prvx = 150;
float prvy = 150;
MyView m;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
m = new MyView(this);
m.setOnTouchListener(this);
setContentView(m);
}
public boolean onTouch(View v, MotionEvent event) {
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN: {
prvx = x;
prvy = y;
x = event.getX();
y = event.getY();
m.invalidate();
}
}
return false;
}
class MyView extends View {
Paint p = new Paint();
Bitmap bm;
int i;
public MyView(Context context) {
super(context);
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
p.setColor(Color.GREEN);
p.setStrokeWidth(4);
canvas.drawLine(prvx, prvy, x, y, p);
}
}
}
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