android 根据SD卡中图片路径读取并显示SD中的图片——源代码

package com.guo;



import java.io.File;



import android.app.Activity;

import android.graphics.Bitmap;

import android.graphics.BitmapFactory;

import android.os.Bundle;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.ImageView;



public class MainAct extends Activity {

        /** Called when the activity is first created. */

        private ImageView img;

        //SD图片路径

        private String filepath = "/sdcard/hot.png";



        @Override

        public void onCreate(Bundle savedInstanceState) {

                super.onCreate(savedInstanceState);

                setContentView(R.layout.main);

                img = (ImageView) findViewById(R.id.img);

                File file = new File(filepath);

                if (file.exists()) {

                        Bitmap bm = BitmapFactory.decodeFile(filepath);

                        //将图片显示到ImageView中

                        img.setImageBitmap(bm);

                }

        }

}