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      1 /*
      2  * Copyright (C) 2011 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 
     18 package com.android.test.hwui;
     19 
     20 import android.app.Activity;
     21 import android.content.Context;
     22 import android.graphics.Canvas;
     23 import android.graphics.Paint;
     24 import android.os.Bundle;
     25 import android.util.Log;
     26 import android.view.Gravity;
     27 import android.view.View;
     28 import android.widget.Button;
     29 import android.widget.LinearLayout;
     30 
     31 import static android.view.View.LAYER_TYPE_HARDWARE;
     32 import static android.view.View.LAYER_TYPE_SOFTWARE;
     33 import static android.view.ViewGroup.LayoutParams.WRAP_CONTENT;
     34 
     35 @SuppressWarnings({"UnusedDeclaration"})
     36 public class DisplayListLayersActivity extends Activity {
     37     private static final int VERTICAL_MARGIN = 12;
     38 
     39     @Override
     40     protected void onCreate(Bundle savedInstanceState) {
     41         super.onCreate(savedInstanceState);
     42 
     43         LinearLayout root = createContainer();
     44         addChild(root, new LayerView(this, 0xffff0000, LAYER_TYPE_HARDWARE, "hardware"),
     45                 WRAP_CONTENT, WRAP_CONTENT);
     46         addChild(root, new LayerView(this, 0xff0000ff, LAYER_TYPE_SOFTWARE, "software"),
     47                 WRAP_CONTENT, WRAP_CONTENT);
     48         addChild(root, createButton(root), WRAP_CONTENT, WRAP_CONTENT);
     49 
     50         setContentView(root);
     51     }
     52 
     53     private Button createButton(final LinearLayout root) {
     54         Button button = new Button(this);
     55         button.setText("Invalidate");
     56         button.setOnClickListener(new View.OnClickListener() {
     57             @Override
     58             public void onClick(View v) {
     59                 for (int i = 0; i < root.getChildCount(); i++) {
     60                     View child = root.getChildAt(i);
     61                     if (child != v) {
     62                         child.invalidate();
     63                     }
     64                 }
     65             }
     66         });
     67 
     68         return button;
     69     }
     70 
     71     private void addChild(LinearLayout root, View child, int width, int height) {
     72         LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(width, height);
     73         params.gravity = Gravity.CENTER_HORIZONTAL;
     74         params.setMargins(0, dipToPx(VERTICAL_MARGIN), 0, 0);
     75         root.addView(child, params);
     76     }
     77 
     78     private int dipToPx(int size) {
     79         return (int) (getResources().getDisplayMetrics().density * size + 0.5f);
     80     }
     81 
     82     private LinearLayout createContainer() {
     83         LinearLayout layout = new LinearLayout(this);
     84         layout.setOrientation(LinearLayout.VERTICAL);
     85         return layout;
     86     }
     87 
     88     private class LayerView extends View {
     89         private static final String LOG_TAG = "LayerView";
     90         private final Paint mPaint = new Paint();
     91 
     92         private final String mTag;
     93 
     94         LayerView(Context context, int color, int layerType, String tag) {
     95             super(context);
     96 
     97             mTag = tag;
     98 
     99             mPaint.setColor(color);
    100             setLayerType(layerType, null);
    101         }
    102 
    103         private void log(String tag) {
    104             Log.d(LOG_TAG, mTag + ": " + tag);
    105         }
    106 
    107         @Override
    108         public void invalidate() {
    109             log("invalidate");
    110             super.invalidate();
    111         }
    112 
    113         @Override
    114         protected void onDraw(Canvas canvas) {
    115             log("draw");
    116             canvas.drawRect(0, 0, getWidth(), getHeight(), mPaint);
    117         }
    118 
    119         @Override
    120         protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
    121             setMeasuredDimension(MeasureSpec.getSize(widthMeasureSpec) / 3,
    122                     MeasureSpec.getSize(heightMeasureSpec) / 3);
    123         }
    124     }
    125 }
    126