DOTS

1. Layout

File main.xml

<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" > </LinearLayout>

2. Java Code

File: DRAW_DOTSActivity.java

package us.blackturtle.drawdots; import android.app.Activity; import android.os.Bundle; import android.content.Context; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.graphics.Paint.Style; import android.view.View; import android.view.ViewGroup; import android.view.ViewGroup.LayoutParams; public class DRAW_DOTSActivity extends Activity { /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); MyCustomPanel view = new MyCustomPanel(this); ViewGroup.LayoutParams params = new ViewGroup.LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT); addContentView(view, params); } private class MyCustomPanel extends View { public MyCustomPanel(Context context) { super(context); } @Override public void draw(Canvas canvas) { Paint paint = new Paint(); paint.setStyle(Style.FILL); paint.setStrokeWidth(3); paint.setColor(Color.YELLOW); float[] pts = new float[600]; for(int i=0; i<600; i++){ if(i%2==0) pts[i] = 10*(i%30) + 30; // x-values else pts[i] = (i/30)*10 + 100; // y-values } canvas.drawPoints(pts, paint); } } }

Screen Shot: