1 package com.example.day18_01picturewizad; 2 3 import android.app.Activity; 4 import android.graphics.Bitmap; 5 import android.graphics.Bitmap.Config; 6 import android.graphics.BitmapFactory; 7 import android.graphics.Canvas; 8 import android.graphics.Matrix; 9 import android.graphics.Paint; 10 import android.os.Bundle; 11 import android.view.View; 12 import android.widget.ImageView; 13 14 public class MainActivity extends Activity { 15 16 private ImageView iv_picture; 17 private float degree; 18 19 @Override 20 protected void onCreate(Bundle savedInstanceState) { 21 super.onCreate(savedInstanceState); 22 setContentView(R.layout.activity_main); 23 iv_picture = (ImageView) findViewById(R.id.iv_picture); 24 } 25 26 /** 27 * 将原始图片放大或缩小 28 * @param v 29 */ 30 public void scale (View v){ 31 32 Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.ic_launcher); 33 Bitmap blank_btimap =Bitmap.createBitmap(bitmap.getWidth()*2, bitmap.getHeight()*2, Config.ARGB_8888); 34 Canvas canvas = new Canvas(blank_btimap); 35 Paint paint = new Paint(); 36 37 //canvas.drawBitmap(bitmap, 0, 0, paint); 38 //现在我们需要将原图 通过放大或者缩小变换，重新绘制到blank_bitmap上 39 40 41 //matrix 矩阵 42 Matrix matrix = new Matrix(); 43 44 float[] values = {1, 0, 0, // 表示向量x = 1x + 0y + 0z 45 0, 1, 0, // 表示向量y = 0x + 1y + 0z 46 0, 0, 1 }; // 表示向量z = 0x + 0y + 1z 47 48 matrix.setValues(values); 49 canvas.drawBitmap(bitmap, matrix, paint); 50 51 iv_picture.setImageBitmap(blank_btimap); 52 53 } 54 55 56 public void horizontal_reverse(View v){ 57 58 Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.ic_launcher); 59 Bitmap blank_btimap =Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), Config.ARGB_8888); 60 61 Canvas canvas = new Canvas(blank_btimap);//会画到blankbitmap上 62 Paint paint = new Paint(); 63 //canvas.drawBitmap(bitmap, 0, 0, paint); 64 //现在我们需要将原图 通过放大或者缩小变换，重新绘制到blank_bitmap上 65 //matrix 矩阵 66 Matrix matrix = new Matrix(); 67 68 float[] values = {-1, 0, 0, // 表示向量x = 1x + 0y + 0z 69 0, 1, 0, // 表示向量y = 0x + 1y + 0z 70 0, 0, 1}; // 表示向量z = 0x + 0y + 1z 71 72 matrix.setValues(values); 73 matrix.postTranslate(bitmap.getWidth(), 0); 74 75 canvas.drawBitmap(bitmap, matrix, paint); 76 iv_picture.setImageBitmap(blank_btimap); 77 } 78 79 80 public void vertical_reverse(View v){ 81 Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.ic_launcher); 82 Bitmap blank_btimap =Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), Config.ARGB_8888); 83 84 Canvas canvas = new Canvas(blank_btimap);//会画到blankbitmap上 85 Paint paint = new Paint(); 86 //canvas.drawBitmap(bitmap, 0, 0, paint); 87 //现在我们需要将原图 通过放大或者缩小变换，重新绘制到blank_bitmap上 88 //matrix 矩阵 89 Matrix matrix = new Matrix(); 90 91 float[] values = { 1, 0, 0, // 表示向量x = 1x + 0y + 0z 92 0, -1, 0, // 表示向量y = 0x + 1y + 0z 93 0, 0, 1}; // 表示向量z = 0x + 0y + 1z 94 95 matrix.setValues(values); 96 matrix.postTranslate(0, bitmap.getHeight()); 97 98 canvas.drawBitmap(bitmap, matrix, paint); 99 iv_picture.setImageBitmap(blank_btimap); 100 } 101 102 103 public void rotate(View v){ 104 105 Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.ic_launcher); 106 Bitmap blank_btimap =Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), Config.ARGB_8888); 107 108 Canvas canvas = new Canvas(blank_btimap);//会画到blankbitmap上 109 Paint paint = new Paint(); 110 //canvas.drawBitmap(bitmap, 0, 0, paint); 111 //现在我们需要将原图 通过放大或者缩小变换，重新绘制到blank_bitmap上 112 //matrix 矩阵 113 Matrix matrix = new Matrix(); 114 115 float[] values = { 1, 0, 0, // 表示向量x = 1x + 0y + 0z 116 0, 1, 0, // 表示向量y = 0x + 1y + 0z 117 0, 0, 1}; // 表示向量z = 0x + 0y + 1z 118 matrix.setValues(values); 119 120 degree = degree+20; 121 matrix.setRotate(degree, bitmap.getWidth()/2, bitmap.getHeight()/2); 122 123 canvas.drawBitmap(bitmap, matrix, paint); 124 iv_picture.setImageBitmap(blank_btimap); 125 } 126 127 128 public void transform(View v){ 129 Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.ic_launcher); 130 Bitmap blank_btimap =Bitmap.createBitmap(bitmap.getWidth()+10, bitmap.getHeight()+10, Config.ARGB_8888); 131 132 Canvas canvas = new Canvas(blank_btimap);//会画到blankbitmap上 133 Paint paint = new Paint(); 134 //canvas.drawBitmap(bitmap, 0, 0, paint); 135 //现在我们需要将原图 通过放大或者缩小变换，重新绘制到blank_bitmap上 136 //matrix 矩阵 137 Matrix matrix = new Matrix(); 138 float[] values = { 1, 0, 0, // 表示向量x = 1x + 0y + 0z 139 0, 1, 0, // 表示向量y = 0x + 1y + 0z 140 0, 0, 1}; // 表示向量z = 0x + 0y + 1z 141 matrix.setValues(values); 142 matrix.postTranslate(10, 10); 143 144 canvas.drawBitmap(bitmap, matrix, paint); 145 iv_picture.setImageBitmap(blank_btimap); 146 } 147 }
018_01图片特效
物随心转，境由心造，一切烦恼皆由心生。