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/*
* 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.app.Activity;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.PorterDuff;
import android.graphics.PorterDuffXfermode;
import android.os.Bundle;
import android.view.View;
@SuppressWarnings({"UnusedDeclaration"})
public class LayersActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(new LayersView(this));
}
public static class LayersView extends View {
private Paint mLayerPaint;
private final Paint mRectPaint;
public LayersView(Context c) {
super(c);
mLayerPaint = new Paint();
mRectPaint = new Paint();
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
canvas.translate(140.0f, 100.0f);
//canvas.drawRGB(255, 255, 255);
int count = canvas.saveLayer(0.0f, 0.0f, 200.0f, 100.0f, mLayerPaint,
Canvas.ALL_SAVE_FLAG);
mRectPaint.setColor(0xffff0000);
canvas.drawRect(0.0f, 0.0f, 200.0f, 100.0f, mRectPaint);
canvas.restoreToCount(count);
canvas.translate(0.0f, 125.0f);
count = canvas.saveLayer(0.0f, 0.0f, 200.0f, 100.0f, mLayerPaint,
Canvas.ALL_SAVE_FLAG);
mRectPaint.setColor(0xff00ff00);
mRectPaint.setAlpha(50);
canvas.drawRect(0.0f, 0.0f, 200.0f, 100.0f, mRectPaint);
canvas.restoreToCount(count);
canvas.translate(25.0f, 125.0f);
mRectPaint.setColor(0xff0000ff);
mRectPaint.setAlpha(255);
canvas.drawRect(0.0f, 0.0f, 100.0f, 50.0f, mRectPaint);
mLayerPaint.setAlpha(127);
mLayerPaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_OUT));
count = canvas.saveLayer(50.0f, 25.0f, 150.0f, 75.0f, mLayerPaint,
Canvas.ALL_SAVE_FLAG);
mRectPaint.setColor(0xffff0000);
canvas.drawRect(50.0f, 25.0f, 150.0f, 75.0f, mRectPaint);
canvas.restoreToCount(count);
canvas.translate(0.0f, 125.0f);
mRectPaint.setColor(0xff0000ff);
mRectPaint.setAlpha(255);
canvas.drawRect(0.0f, 0.0f, 100.0f, 50.0f, mRectPaint);
mLayerPaint.setColor(0xffff0000);
mLayerPaint.setAlpha(127);
mLayerPaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DST_ATOP));
count = canvas.saveLayer(50.0f, 25.0f, 150.0f, 75.0f, mLayerPaint,
Canvas.ALL_SAVE_FLAG);
mRectPaint.setColor(0xffff0000);
canvas.drawRect(50.0f, 25.0f, 150.0f, 75.0f, mRectPaint);
canvas.restoreToCount(count);
mLayerPaint = new Paint();
}
}
}
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