暫時不需要研究具體詳細的怎麽實現過程，直接使用已有的方法即可，代碼如下

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，豎直方向2倍
        //買一張紙
        Bitmap bitmap1 = Bitmap.createBitmap(bitmap.getWidth() * 2, bitmap.getHeight() * 2, bitmap.getConfig());
        //買個畫板
        Canvas canvas = new Canvas(bitmap1);
        //臨摹會話
        Paint paint = new Paint();
        paint.setColor(Color.BLACK);
        canvas.drawBitmap(bitmap,matrix,paint);
        //傳入新紙
        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);

        //買個紙
        Bitmap bitmap1 = Bitmap.createBitmap(bitmap.getWidth() / 2, bitmap.getHeight() / 2, bitmap.getConfig());
        //買個畫板
        Canvas canvas=new Canvas(bitmap1);
        Paint paint=new Paint();
        paint.setColor(Color.BLACK);
        canvas.drawBitmap(bitmap,matrix,paint);
        iv.setImageBitmap(bitmap1);
    }

}

本文出自 “YuanGuShi” 博客，請務必保留此出處http://cm0425.blog.51cto.com/10819451/1943888

Android圖像變化