DemoFileSDCard

package com.example.hhh;

import java.io.File;
import java.util.ArrayList;

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.widget.ImageView;

public class MainActivity extends Activity {
    ImageView iv;
    private ArrayList<File> fileList = new ArrayList<File>();


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        iv = (ImageView) findViewById(R.id.ivimage);


        final File folder = new File("/sdcard");

        getfile(folder);
        arrFiles();
    }



    public ArrayList<File> getfile(File dir) {
        File listFile[] = dir.listFiles();
        if (listFile != null && listFile.length > 0) {
            for (int i = 0; i < listFile.length; i++) {

                if (listFile[i].isDirectory()) {
                    fileList.add(listFile[i]);
                    getfile(listFile[i]);

                } else {
                    if (listFile[i].getName().endsWith(".png")
                            || listFile[i].getName().endsWith(".jpg")
                            || listFile[i].getName().endsWith(".jpeg")
                            || listFile[i].getName().endsWith(".gif"))

                    {
                        fileList.add(listFile[i]);


                    }
                }

            }
        }
        return fileList;

    }

    public void arrFiles() {
        for (int i = 0; i < fileList.size(); i++) {
            if (fileList.get(i).getParent().toString()
                    .equals(fileList.get(i++).getParent().toString())) {

                Log.d("" + fileList.get(i).getParent(),
                        "HIHI" + fileList.get(i));
            } else {

            }

        }


    }



}