/* * Copyright (C) 2008 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.app.Activity;import android.content.Context;import android.graphics.*;import android.os.Bundle;import android.view.*;public class Layers extends GraphicsActivity {    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(new SampleView(this));    }        private static class SampleView extends View {        private static final int LAYER_FLAGS = Canvas.MATRIX_SAVE_FLAG |                                            Canvas.CLIP_SAVE_FLAG |                                            Canvas.HAS_ALPHA_LAYER_SAVE_FLAG |                                            Canvas.FULL_COLOR_LAYER_SAVE_FLAG |                                            Canvas.CLIP_TO_LAYER_SAVE_FLAG;        private Paint mPaint;        public SampleView(Context context) {            super(context);            setFocusable(true);                        mPaint = new Paint();            mPaint.setAntiAlias(true);        }                @Override protected void onDraw(Canvas canvas) {            canvas.drawColor(Color.WHITE);                                    canvas.translate(10, 10);                        canvas.saveLayerAlpha(0, 0, 200, 200, 0x88, LAYER_FLAGS);                        mPaint.setColor(Color.RED);            canvas.drawCircle(75, 75, 75, mPaint);            mPaint.setColor(Color.BLUE);            canvas.drawCircle(125, 125, 75, mPaint);                        canvas.restore();        }    }}