| /* |
| * 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.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); |
| } |
| } |
| } |
| |