| /* |
| * Copyright (C) 2020 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.Color; |
| import android.graphics.LinearGradient; |
| import android.graphics.Paint; |
| import android.graphics.RenderEffect; |
| import android.graphics.RenderNode; |
| import android.graphics.Shader; |
| import android.os.Bundle; |
| import android.view.Gravity; |
| import android.view.View; |
| import android.widget.LinearLayout; |
| |
| @SuppressWarnings({"UnusedDeclaration"}) |
| public class RenderEffectShaderActivity extends Activity { |
| @Override |
| protected void onCreate(Bundle savedInstanceState) { |
| super.onCreate(savedInstanceState); |
| |
| LinearLayout layout = new LinearLayout(this); |
| layout.setClipChildren(false); |
| layout.setGravity(Gravity.CENTER); |
| layout.setOrientation(LinearLayout.VERTICAL); |
| |
| |
| LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(500, 500); |
| params.bottomMargin = 100; |
| |
| layout.addView(new ShaderRenderEffectView(this), params); |
| |
| setContentView(layout); |
| } |
| |
| public static class ShaderRenderEffectView extends View { |
| |
| private final Paint mPaint; |
| private final RenderNode mRenderNode; |
| |
| public ShaderRenderEffectView(Context c) { |
| super(c); |
| |
| mPaint = new Paint(Paint.ANTI_ALIAS_FLAG); |
| mRenderNode = new RenderNode("blurNode"); |
| |
| } |
| |
| @Override |
| protected void onLayout(boolean changed, int left, int top, int right, int bottom) { |
| if (changed) { |
| LinearGradient gradient = new LinearGradient( |
| 0f, 0f, |
| 0f, bottom - top, |
| new int[]{Color.CYAN, Color.MAGENTA}, |
| null, |
| Shader.TileMode.CLAMP |
| ); |
| mRenderNode.setRenderEffect( |
| RenderEffect.createShaderEffect(gradient) |
| ); |
| |
| int width = right - left; |
| int height = bottom - top; |
| mRenderNode.setPosition(0, 0, width, height); |
| Canvas canvas = mRenderNode.beginRecording(width, height); |
| mPaint.setColor(Color.BLUE); |
| |
| canvas.drawRect( |
| 0, |
| 0, |
| width, |
| height, |
| mPaint |
| ); |
| |
| mPaint.setColor(Color.RED); |
| canvas.drawCircle((right - left) / 2f, (bottom - top) / 2f, 50f, mPaint); |
| |
| mRenderNode.endRecording(); |
| } |
| } |
| |
| @Override |
| protected void onDraw(Canvas canvas) { |
| super.onDraw(canvas); |
| canvas.drawRenderNode(mRenderNode); |
| } |
| } |
| } |