/* * Copyright (C) 2007 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * *      http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */package com.example.android.apis.graphics;import android.app.Activity;import android.content.Context;import android.graphics.*;import android.os.Bundle;import android.view.View;public class DrawPoints extends GraphicsActivity {    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(new SampleView(this));    }        private static class SampleView extends View {        private Paint   mPaint = new Paint();        private float[] mPts;        private static final float SIZE = 300;        private static final int SEGS = 32;        private static final int X = 0;        private static final int Y = 1;                private void buildPoints() {            final int ptCount = (SEGS + 1) * 2;            mPts = new float[ptCount * 2];                        float value = 0;            final float delta = SIZE / SEGS;            for (int i = 0; i <= SEGS; i++) {                mPts[i*4 + X] = SIZE - value;                mPts[i*4 + Y] = 0;                mPts[i*4 + X + 2] = 0;                mPts[i*4 + Y + 2] = value;                value += delta;            }        }            public SampleView(Context context) {            super(context);                        buildPoints();        }                @Override protected void onDraw(Canvas canvas) {            Paint paint = mPaint;                        canvas.translate(10, 10);            canvas.drawColor(Color.WHITE);            paint.setColor(Color.RED);            paint.setStrokeWidth(0);            canvas.drawLines(mPts, paint);                        paint.setColor(Color.BLUE);            paint.setStrokeWidth(3);            canvas.drawPoints(mPts, paint);        }    }}