Android在View中载入图片

首先将图片放入res/drawable文件夹下

申明bitmap对象

bitmap载入有两种方法：

bitmap=((BitmapDrawable)this.getResources().getDrawable(drawable.a01)).getBitmap();
bitmap = BitmapFactory.decodeResource(this.getResources(), drawable.a01);//获取图片

然后在onDraw方法中用drawBitmap来显示位图

package com.hu.bitmap;
 
 import com.hu.bitmap.R.drawable;
 
 import android.content.Context;
 import android.graphics.Bitmap;
 import android.graphics.BitmapFactory;
 import android.graphics.Canvas;
 import android.graphics.Paint;
 import android.graphics.Rect;
 import android.graphics.drawable.BitmapDrawable;
 import android.view.View;
 
 public class BitMapView extends View {
 
     Bitmap bitmap;
     Paint paint;
 
     public BitMapView(Context context) {
         super(context);
          //bitmap=((BitmapDrawable)this.getResources().getDrawable(drawable.a01)).getBitmap();
         bitmap = BitmapFactory.decodeResource(this.getResources(), drawable.a01);//获取图片
         paint = new Paint();
         paint.setAntiAlias(true);
     }
 
     @Override
     protected void onDraw(Canvas canvas) {
         super.onDraw(canvas);
         canvas.drawBitmap(bitmap, 0, 0, paint);//画图
         Rect src=new Rect(100, 0, 200, 200);
         Rect dst=new Rect(0, 250, 50, 350);
         canvas.drawBitmap(bitmap, src, dst, paint);//截取图片上的src画到dst上
     }
 
 }