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/*
* Copyright (C) 2011 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.util.Log;
import android.view.Gravity;
import android.view.View;
import android.widget.Button;
import android.widget.LinearLayout;
import static android.view.View.LAYER_TYPE_HARDWARE;
import static android.view.View.LAYER_TYPE_SOFTWARE;
import static android.view.ViewGroup.LayoutParams.WRAP_CONTENT;
@SuppressWarnings({"UnusedDeclaration"})
public class DisplayListLayersActivity extends Activity {
private static final int VERTICAL_MARGIN = 12;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
LinearLayout root = createContainer();
addChild(root, new LayerView(this, 0xffff0000, LAYER_TYPE_HARDWARE, "hardware"),
WRAP_CONTENT, WRAP_CONTENT);
addChild(root, new LayerView(this, 0xff0000ff, LAYER_TYPE_SOFTWARE, "software"),
WRAP_CONTENT, WRAP_CONTENT);
addChild(root, createButton(root), WRAP_CONTENT, WRAP_CONTENT);
setContentView(root);
}
private Button createButton(final LinearLayout root) {
Button button = new Button(this);
button.setText("Invalidate");
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
for (int i = 0; i < root.getChildCount(); i++) {
View child = root.getChildAt(i);
if (child != v) {
child.invalidate();
}
}
}
});
return button;
}
private void addChild(LinearLayout root, View child, int width, int height) {
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(width, height);
params.gravity = Gravity.CENTER_HORIZONTAL;
params.setMargins(0, dipToPx(VERTICAL_MARGIN), 0, 0);
root.addView(child, params);
}
private int dipToPx(int size) {
return (int) (getResources().getDisplayMetrics().density * size + 0.5f);
}
private LinearLayout createContainer() {
LinearLayout layout = new LinearLayout(this);
layout.setOrientation(LinearLayout.VERTICAL);
return layout;
}
private class LayerView extends View {
private static final String LOG_TAG = "LayerView";
private final Paint mPaint = new Paint();
private final String mTag;
LayerView(Context context, int color, int layerType, String tag) {
super(context);
mTag = tag;
mPaint.setColor(color);
setLayerType(layerType, null);
}
private void log(String tag) {
Log.d(LOG_TAG, mTag + ": " + tag);
}
@Override
public void invalidate() {
log("invalidate");
super.invalidate();
}
@Override
protected void onDraw(Canvas canvas) {
log("draw");
canvas.drawRect(0, 0, getWidth(), getHeight(), mPaint);
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
setMeasuredDimension(MeasureSpec.getSize(widthMeasureSpec) / 3,
MeasureSpec.getSize(heightMeasureSpec) / 3);
}
}
}
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