1 /* 2 * Copyright (C) 2007 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.example.android.apis.graphics; 18 19 import com.example.android.apis.R; 20 21 import android.app.Activity; 22 import android.content.Context; 23 import android.graphics.*; 24 import android.graphics.drawable.*; 25 import android.os.Bundle; 26 import android.view.KeyEvent; 27 import android.view.*; 28 29 public class RoundRects extends GraphicsActivity { 30 31 @Override onCreate(Bundle savedInstanceState)32 protected void onCreate(Bundle savedInstanceState) { 33 super.onCreate(savedInstanceState); 34 setContentView(new SampleView(this)); 35 } 36 37 private static class SampleView extends View { 38 private Path mPath; 39 private Paint mPaint; 40 private Rect mRect; 41 private GradientDrawable mDrawable; 42 SampleView(Context context)43 public SampleView(Context context) { 44 super(context); 45 setFocusable(true); 46 47 mPath = new Path(); 48 mPaint = new Paint(Paint.ANTI_ALIAS_FLAG); 49 mRect = new Rect(0, 0, 120, 120); 50 51 mDrawable = new GradientDrawable(GradientDrawable.Orientation.TL_BR, 52 new int[] { 0xFFFF0000, 0xFF00FF00, 53 0xFF0000FF }); 54 mDrawable.setShape(GradientDrawable.RECTANGLE); 55 mDrawable.setGradientRadius((float)(Math.sqrt(2) * 60)); 56 } 57 setCornerRadii(GradientDrawable drawable, float r0, float r1, float r2, float r3)58 static void setCornerRadii(GradientDrawable drawable, float r0, 59 float r1, float r2, float r3) { 60 drawable.setCornerRadii(new float[] { r0, r0, r1, r1, 61 r2, r2, r3, r3 }); 62 } 63 onDraw(Canvas canvas)64 @Override protected void onDraw(Canvas canvas) { 65 66 mDrawable.setBounds(mRect); 67 68 float r = 16; 69 70 canvas.save(); 71 canvas.translate(10, 10); 72 mDrawable.setGradientType(GradientDrawable.LINEAR_GRADIENT); 73 setCornerRadii(mDrawable, r, r, 0, 0); 74 mDrawable.draw(canvas); 75 canvas.restore(); 76 77 canvas.save(); 78 canvas.translate(10 + mRect.width() + 10, 10); 79 mDrawable.setGradientType(GradientDrawable.RADIAL_GRADIENT); 80 setCornerRadii(mDrawable, 0, 0, r, r); 81 mDrawable.draw(canvas); 82 canvas.restore(); 83 84 canvas.translate(0, mRect.height() + 10); 85 86 canvas.save(); 87 canvas.translate(10, 10); 88 mDrawable.setGradientType(GradientDrawable.SWEEP_GRADIENT); 89 setCornerRadii(mDrawable, 0, r, r, 0); 90 mDrawable.draw(canvas); 91 canvas.restore(); 92 93 canvas.save(); 94 canvas.translate(10 + mRect.width() + 10, 10); 95 mDrawable.setGradientType(GradientDrawable.LINEAR_GRADIENT); 96 setCornerRadii(mDrawable, r, 0, 0, r); 97 mDrawable.draw(canvas); 98 canvas.restore(); 99 100 canvas.translate(0, mRect.height() + 10); 101 102 canvas.save(); 103 canvas.translate(10, 10); 104 mDrawable.setGradientType(GradientDrawable.RADIAL_GRADIENT); 105 setCornerRadii(mDrawable, r, 0, r, 0); 106 mDrawable.draw(canvas); 107 canvas.restore(); 108 109 canvas.save(); 110 canvas.translate(10 + mRect.width() + 10, 10); 111 mDrawable.setGradientType(GradientDrawable.SWEEP_GRADIENT); 112 setCornerRadii(mDrawable, 0, r, 0, r); 113 mDrawable.draw(canvas); 114 canvas.restore(); 115 116 } 117 } 118 } 119 120