tests/HwAccelerationTest/src/com/android/test/hwui/MultiLayersActivity.java

/*
 * Copyright (C) 2012 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.app.Activity;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.os.Bundle;
import android.view.View;
import android.widget.LinearLayout;

@SuppressWarnings("UnusedDeclaration")
public class MultiLayersActivity extends Activity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        LinearLayout grid = new LinearLayout(this);
        grid.setOrientation(LinearLayout.VERTICAL);

        LinearLayout row1 = new LinearLayout(this);
        row1.setOrientation(LinearLayout.HORIZONTAL);
        grid.addView(row1, new LinearLayout.LayoutParams(
                LinearLayout.LayoutParams.MATCH_PARENT, 0, 1.0f));

        LinearLayout row2 = new LinearLayout(this);
        row2.setOrientation(LinearLayout.HORIZONTAL);
        grid.addView(row2, new LinearLayout.LayoutParams(
                LinearLayout.LayoutParams.MATCH_PARENT, 0, 1.0f));

        row1.addView(new LayerView(this, 0xffff0000), new LinearLayout.LayoutParams(
                0, LinearLayout.LayoutParams.MATCH_PARENT, 1.0f));
        row1.addView(new LayerView(this, 0x0f00ff00), new LinearLayout.LayoutParams(
                0, LinearLayout.LayoutParams.MATCH_PARENT, 1.0f));

        row2.addView(new LayerView(this, 0x0f0000ff), new LinearLayout.LayoutParams(
                0, LinearLayout.LayoutParams.MATCH_PARENT, 1.0f));
        row2.addView(new LayerView(this, 0xffffff00), new LinearLayout.LayoutParams(
                0, LinearLayout.LayoutParams.MATCH_PARENT, 1.0f));

        setContentView(grid);
    }

    private class LayerView extends View {
        private final Paint mPaint;

        public LayerView(Context context, int color) {
            super(context);
            mPaint = new Paint();
            mPaint.setColor(color);
            setLayerType(LAYER_TYPE_HARDWARE, null);
        }

        @Override
        protected void onDraw(Canvas canvas) {
            canvas.drawRect(0.0f, 0.0f, getWidth(), getHeight(), mPaint);
            invalidate();
        }
    }
}