/* * 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;// Need the following import to get access to the app resources, since this// class is in a sub-package.//import com.example.android.apis.R;import android.app.Activity;import android.content.Context;import android.graphics.*;import android.os.Bundle;import android.view.KeyEvent;import android.view.View;public class Sweep 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(Paint.ANTI_ALIAS_FLAG);        private float mRotate;        private Matrix mMatrix = new Matrix();        private Shader mShader;        private boolean mDoTiming;        public SampleView(Context context) {            super(context);            setFocusable(true);            setFocusableInTouchMode(true);            float x = 160;            float y = 100;            mShader = new SweepGradient(x, y, new int[] { Color.GREEN,                                                  Color.RED,                                                  Color.BLUE,                                                  Color.GREEN }, null);            mPaint.setShader(mShader);        }                @Override protected void onDraw(Canvas canvas) {            Paint paint = mPaint;            float x = 160;            float y = 100;            canvas.drawColor(Color.WHITE);            mMatrix.setRotate(mRotate, x, y);            mShader.setLocalMatrix(mMatrix);            mRotate += 3;            if (mRotate >= 360) {                mRotate = 0;            }            invalidate();            if (mDoTiming) {                long now = System.currentTimeMillis();                for (int i = 0; i < 20; i++) {                    canvas.drawCircle(x, y, 80, paint);                }                now = System.currentTimeMillis() - now;                android.util.Log.d("skia", "sweep ms = " + (now/20.));            }            else {                canvas.drawCircle(x, y, 80, paint);            }        }        @Override public boolean onKeyDown(int keyCode, KeyEvent event) {            switch (keyCode) {                case KeyEvent.KEYCODE_D:                    mPaint.setDither(!mPaint.isDither());                    invalidate();                    return true;                case KeyEvent.KEYCODE_T:                    mDoTiming = !mDoTiming;                    invalidate();                    return true;            }            return super.onKeyDown(keyCode, event);        }    }}