tests/UiBench/src/com/android/test/uibench/BitmapUploadActivity.java

/*
 * Copyright (C) 2015 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.uibench;

import android.animation.ObjectAnimator;
import android.animation.ValueAnimator;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Rect;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.AttributeSet;
import android.util.DisplayMetrics;
import android.view.View;

public class BitmapUploadActivity extends AppCompatActivity {
    public static class UploadView extends View {
        private int mColorValue;
        private Bitmap mBitmap;
        private final DisplayMetrics mMetrics = new DisplayMetrics();
        private final Rect mRect = new Rect();

        public UploadView(Context context, AttributeSet attrs) {
            super(context, attrs);
        }

        @SuppressWarnings("unused")
        public void setColorValue(int colorValue) {
            if (colorValue == mColorValue) return;

            mColorValue = colorValue;

            // modify the bitmap's color to ensure it's uploaded to the GPU
            mBitmap.eraseColor(Color.rgb(mColorValue, 255 - mColorValue, 255));

            invalidate();
        }

        @Override
        protected void onAttachedToWindow() {
            super.onAttachedToWindow();

            getDisplay().getMetrics(mMetrics);
            int minDisplayDimen = Math.min(mMetrics.widthPixels, mMetrics.heightPixels);
            int bitmapSize = Math.min((int) (minDisplayDimen * 0.75), 720);
            if (mBitmap == null
                    || mBitmap.getWidth() != bitmapSize
                    || mBitmap.getHeight() != bitmapSize) {
                mBitmap = Bitmap.createBitmap(bitmapSize, bitmapSize, Bitmap.Config.ARGB_8888);
            }
        }

        @Override
        protected void onDraw(Canvas canvas) {
            if (mBitmap != null) {
                mRect.set(0, 0, getWidth(), getHeight());
                canvas.drawBitmap(mBitmap, null, mRect, null);
            }
        }
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_bitmap_upload);

        // animate color to force bitmap uploads
        UploadView uploadView = findViewById(R.id.upload_view);
        ObjectAnimator colorValueAnimator = ObjectAnimator.ofInt(uploadView, "colorValue", 0, 255);
        colorValueAnimator.setRepeatMode(ValueAnimator.REVERSE);
        colorValueAnimator.setRepeatCount(ValueAnimator.INFINITE);
        colorValueAnimator.start();

        // animate scene root to guarantee there's a minimum amount of GPU rendering work
        View uploadRoot = findViewById(R.id.upload_root);
        ObjectAnimator yAnimator = ObjectAnimator.ofFloat(uploadRoot, "translationY", 0, 100);
        yAnimator.setRepeatMode(ValueAnimator.REVERSE);
        yAnimator.setRepeatCount(ValueAnimator.INFINITE);
        yAnimator.start();
    }
}