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      1 /*
      2  * Copyright (C) 2010 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.android.test.hwui;
     18 
     19 import android.app.Activity;
     20 import android.content.Context;
     21 import android.graphics.Canvas;
     22 import android.graphics.Paint;
     23 import android.os.Bundle;
     24 import android.view.View;
     25 
     26 @SuppressWarnings({"UnusedDeclaration"})
     27 public class NewLayersActivity extends Activity {
     28     @Override
     29     protected void onCreate(Bundle savedInstanceState) {
     30         super.onCreate(savedInstanceState);
     31         setContentView(new LayersView(this));
     32     }
     33 
     34     public static class LayersView extends View {
     35         private Paint mLayerPaint;
     36         private final Paint mRectPaint;
     37 
     38         public LayersView(Context c) {
     39             super(c);
     40 
     41             mLayerPaint = new Paint();
     42             mLayerPaint.setAlpha(127);
     43             mRectPaint = new Paint();
     44             mRectPaint.setAntiAlias(true);
     45             mRectPaint.setTextSize(24.0f);
     46         }
     47 
     48         @Override
     49         protected void onDraw(Canvas canvas) {
     50             super.onDraw(canvas);
     51             canvas.drawRGB(128, 255, 128);
     52 
     53             canvas.save();
     54 
     55             canvas.translate(140.0f, 100.0f);
     56             drawStuff(canvas, Canvas.ALL_SAVE_FLAG);
     57 
     58             canvas.translate(0.0f, 200.0f);
     59             drawStuff(canvas, Canvas.HAS_ALPHA_LAYER_SAVE_FLAG);
     60 
     61             canvas.restore();
     62         }
     63 
     64         private void drawStuff(Canvas canvas, int saveFlags) {
     65             int count = canvas.saveLayer(0.0f, 0.0f, 200.0f, 100.0f, mLayerPaint, saveFlags);
     66 
     67             mRectPaint.setColor(0x7fff0000);
     68             canvas.drawRect(-20.0f, -20.0f, 220.0f, 120.0f, mRectPaint);
     69 
     70             mRectPaint.setColor(0xff000000);
     71             canvas.drawText("This is a very long string to overlap between layers and framebuffer",
     72                     -100.0f, 50.0f, mRectPaint);
     73 
     74             canvas.restoreToCount(count);
     75         }
     76     }
     77 }
     78