| /* |
| * Copyright (C) 2010 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.android.test.hwui; |
| |
| import android.animation.ObjectAnimator; |
| import android.app.Activity; |
| import android.content.Context; |
| import android.graphics.Bitmap; |
| import android.graphics.Canvas; |
| import android.graphics.Paint; |
| import android.os.Bundle; |
| import android.view.Gravity; |
| import android.view.View; |
| import android.widget.FrameLayout; |
| |
| @SuppressWarnings({"UnusedDeclaration"}) |
| public class BitmapMutateActivity extends Activity { |
| private static final int PATTERN_SIZE = 400; |
| |
| private ObjectAnimator mAnimator; |
| |
| @Override |
| protected void onCreate(Bundle savedInstanceState) { |
| super.onCreate(savedInstanceState); |
| final BitmapsView view = new BitmapsView(this); |
| final FrameLayout layout = new FrameLayout(this); |
| |
| layout.addView(view, new FrameLayout.LayoutParams(480, 800, Gravity.CENTER)); |
| |
| setContentView(layout); |
| |
| mAnimator = ObjectAnimator.ofInt(view, "offset", 0, PATTERN_SIZE - 1); |
| mAnimator.setDuration(1500); |
| mAnimator.setRepeatCount(ObjectAnimator.INFINITE); |
| mAnimator.setRepeatMode(ObjectAnimator.REVERSE); |
| mAnimator.start(); |
| } |
| |
| @Override |
| protected void onDestroy() { |
| super.onDestroy(); |
| mAnimator.cancel(); |
| } |
| |
| static class BitmapsView extends View { |
| private final Paint mBitmapPaint; |
| private final Bitmap mBitmap1; |
| private final int[] mPixels; |
| |
| private int mOffset; |
| private int mSlice; |
| private static final int[] mShifts = new int[] { 16, 8, 0 }; |
| |
| BitmapsView(Context c) { |
| super(c); |
| |
| mBitmap1 = Bitmap.createBitmap(PATTERN_SIZE, PATTERN_SIZE, Bitmap.Config.ARGB_8888); |
| mBitmapPaint = new Paint(); |
| |
| mPixels = new int[mBitmap1.getWidth() * mBitmap1.getHeight()]; |
| mSlice = mBitmap1.getWidth() / 3; |
| } |
| |
| public void setOffset(int offset) { |
| mOffset = offset; |
| invalidate(); |
| } |
| |
| @Override |
| protected void onDraw(Canvas canvas) { |
| super.onDraw(canvas); |
| |
| int width = mBitmap1.getWidth(); |
| int height = mBitmap1.getHeight(); |
| |
| canvas.translate((getWidth() - width) / 2, (getHeight() - height) / 2); |
| |
| for (int x = 0; x < width; x++) { |
| int color = 0xff000000; |
| int i = x == 0 ? 0 : x - 1; |
| color |= (int) ((0xff * ((i + mOffset) % mSlice) / (float) mSlice)) << |
| mShifts[i / mSlice]; |
| for (int y = 0; y < height; y++) { |
| mPixels[y * width + x] = color; |
| } |
| } |
| |
| mBitmap1.setPixels(mPixels, 0, width, 0, 0, width, height); |
| canvas.drawBitmap(mBitmap1, 0.0f, 0.0f, mBitmapPaint); |
| } |
| } |
| } |