android遍历sd卡中的所有文件

? 最近做个上传图片功能，需要对sd中的所需要的图片进行上传，需要在sd卡中找到这个图片。具体方法如下：

file_row.xml:

?? <?xml version="1.0" encoding="utf-8"?>
<TextView android:id="@+id/text1"
?xmlns:android="http://schemas.android.com/apk/res/android"
?android:layout_width="wrap_content"
?android:layout_height="wrap_content" />

directory_list.xml:

<?xml version="1.0" encoding="utf-8"?>
<TextView android:id="@+id/text1"
?xmlns:android="http://schemas.android.com/apk/res/android"
?android:layout_width="wrap_content"
?android:layout_height="wrap_content" />

?

?

TestGrid.java:

?

?import java.io.File;
import java.io.FileFilter;
import java.util.ArrayList;
import java.util.List;

import android.app.ListActivity;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.View;
import android.widget.ListView;

public class TestGrid?? extends ListActivity {
?private static final FileFilter IMAGES_FILTER = new FileFilter() {
?
??public boolean accept(File f) {
???return f.isDirectory() || f.getName().matches("^.*?\\.(jpg|png|bmp|gif)$");
??}
?};

?private FileListAdapter fileList;

?public void onCreate(Bundle icicle) {
??super.onCreate(icicle);
??setContentView(R.layout.directory_list);
??fill(new File("/"));
?}

?public boolean onKeyDown(int keyCode, KeyEvent event) {
??if (keyCode == KeyEvent.KEYCODE_BACK && !fileList.isRoot()) {
???fill(fileList.getItem(1));
???return true;
??}
??return super.onKeyDown(keyCode, event);
?}

?private void fill(File folder) {
??List<File> files = new ArrayList<File>();
??files.add(folder);
??if (folder.getParentFile() != null)
???files.add(folder.getParentFile());

??for (File file : folder.listFiles(IMAGES_FILTER)) {
???files.add(file);
??}

??fileList = new FileListAdapter(this, R.layout.file_row, files);
??setListAdapter(fileList);
?}

?@Override
?protected void onListItemClick(ListView l, View v, int position, long id) {
??File file = fileList.getItem(position);
??if (file.isDirectory())
???fill(file);
??// TODO use image switcher to display selected images
?}
}

?

FileListAdapter.java

?

import java.io.File;
import java.util.List;

import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.TextView;

public class FileListAdapter extends ArrayAdapter<File>{

?public FileListAdapter(Context context, int Resource,List<File> objects) {
??super(context,Resource,objects);
??// TODO Auto-generated constructor stub
?}
?
?? @Override
?? public View getView(int position, View convertView, ViewGroup parent) {
???? TextView view = (TextView) super.getView(position, convertView, parent);
???? File file = getItem(position);
???? if (position == 0)
?????? view.setText(view.getResources().getString(R.string.current_folder) + file.getAbsolutePath());
???? else if (position == 1 && !isRoot())
?????? view.setText(R.string.to_parent_folder);
???? else
?????? view.setText(file.getName());
???? return view;
?? }

?? public boolean isRoot() {
???? return getItem(0).getParent() == null;
?? }

?}

?

?

1 楼 marine8888 2010-10-12 能运行吗 ？