Android图像变化 _Android

【Android图像变化】满堂花醉三千客，一剑霜寒十四州。这篇文章主要讲述Android图像变化相关的知识，希望能为你提供帮助。
暂时不需要研究具体详细的怎么实现过程，直接使用已有的方法即可，代码如下

package com.yuanlp.testimage; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Matrix; import android.graphics.Paint; import android.os.Bundle; import android.support.v7.app.AppCompatActivity; import android.view.View; import android.widget.ImageView; public class MainActivity extends AppCompatActivity { private ImageView iv; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); iv = (ImageView) findViewById(R.id.iv); } public void turnBig(View view){ Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.meinv); Matrix matrix=new Matrix(); matrix.setScale(2,2); //放大四倍，水平方向2倍，竖直方向2倍 //买一张纸 Bitmap bitmap1 = Bitmap.createBitmap(bitmap.getWidth() * 2, bitmap.getHeight() * 2, bitmap.getConfig()); //买个画板 Canvas canvas = new Canvas(bitmap1); //临摹会话 Paint paint = new Paint(); paint.setColor(Color.BLACK); canvas.drawBitmap(bitmap,matrix,paint); //传入新纸 iv.setImageBitmap(bitmap1); } public void turnSmall(View view){ Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.meinv); Matrix matrix=new Matrix(); matrix.setScale(0.5f,0.5f); //买个纸 Bitmap bitmap1 = Bitmap.createBitmap(bitmap.getWidth() / 2, bitmap.getHeight() / 2, bitmap.getConfig()); //买个画板 Canvas canvas=new Canvas(bitmap1); Paint paint=new Paint(); paint.setColor(Color.BLACK); canvas.drawBitmap(bitmap,matrix,paint); iv.setImageBitmap(bitmap1); }}

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