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

a01是图片名

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
    }

}