模拟手机文件管理之查看与选择功能
Activity：
package com.example.zjc_file_choice.activity; import java.io.File; import java.util.ArrayList; import java.util.List; import com.example.zjc_file_choice.R; import android.app.ListActivity; import android.content.Intent; import android.net.Uri; import android.os.Bundle; import android.view.View; import android.view.Window; import android.widget.AdapterView; import android.widget.AdapterView.OnItemLongClickListener; import android.widget.ImageView; import android.widget.ListView; import android.widget.TextView; import android.widget.Toast; /** * 文件选择不需要权限。该Activity可以选择文件，也可以打开文件 * * @author Zjc121327 * @data 2015/02/06 * */ public class MyFileManagerActivity extends ListActivity { /** 文件名称集合 */ private List<String> items = null; /** 文件绝对路径集合 */ private List<String> paths = null; /** 根目录，路径 */ private String rootPath; /** 当前目录，路径 */ private TextView mPath; /** 文件选择的状态 ：true为选择状态 */ private boolean selectState = false; /** 选中文件的绝对路径集合 */ private List<String> mSelectedFilePaths = new ArrayList<String>(); @Override protected void onCreate(Bundle icicle) { super.onCreate(icicle); requestWindowFeature(Window.FEATURE_NO_TITLE); setContentView(R.layout.activity_file_manager); rootPath = SDCardFetchUtils.getSDCardPath() + "/"; mPath = (TextView) findViewById(R.id.mPath); getFileDir(rootPath); getListView().setOnItemLongClickListener(longClickListener); } /** * 根据文件夹的绝对路径获取文件夹里面的文件 * * @param filePath * 文件夹的绝对路径 */ private void getFileDir(String filePath) { mPath.setText("存储目录：" + filePath); items = new ArrayList<String>(); paths = new ArrayList<String>(); File f = new File(filePath); if (!f.exists()) { f.mkdirs(); } File[] files = f.listFiles(); if (!filePath.equals(rootPath)) { items.add("b1"); paths.add(rootPath); items.add("b2"); paths.add(f.getParent()); } if (files != null) { for (int i = 0; i < files.length; i++) { File file = files[i]; items.add(file.getName()); paths.add(file.getPath()); } } else { Toast.makeText(getApplicationContext(), "该文件夹中没有文件", Toast.LENGTH_LONG).show(); } setListAdapter(new FileFolderAdapter(this, items, paths)); } private OnItemLongClickListener longClickListener = new OnItemLongClickListener() { @Override public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long id) { File file = new File(paths.get(position)); if (!file.isDirectory()) { if (!mSelectedFilePaths.contains(paths.get(position))) { mSelectedFilePaths.add(paths.get(position)); view.setBackgroundColor(getResources().getColor( R.color.white_gray)); ImageView selected = (ImageView) view .findViewById(R.id.selected); selected.setVisibility(View.VISIBLE); selectState = true;// 设置处于文件选择状态 } else { Toast.makeText(getApplicationContext(), "该文件已选择", Toast.LENGTH_LONG).show(); } } else { getFileDir(file.getAbsolutePath()); } return true; } }; @Override protected void onListItemClick(ListView l, View v, int position, long id) { File file = new File(paths.get(position)); // 不是文件选择状态时 if (!selectState) { // 判断是否为文件夹 if (file.isDirectory()) { getFileDir(paths.get(position)); } else { openFile(file); } } else { if (!file.isDirectory()) { // 如果文件存在 if (mSelectedFilePaths.contains(paths.get(position))) { mSelectedFilePaths.remove(paths.get(position)); v.setBackgroundColor(getResources().getColor(R.color.white)); ImageView selected = (ImageView) v .findViewById(R.id.selected); selected.setVisibility(View.GONE); } else {// 如果不在 mSelectedFilePaths.add(paths.get(position)); v.setBackgroundColor(getResources().getColor( R.color.white_gray)); ImageView selected = (ImageView) v .findViewById(R.id.selected); selected.setVisibility(View.VISIBLE); } } else { Toast.makeText(getApplicationContext(), "文件选择状态时，文件夹不能被选择", Toast.LENGTH_LONG).show(); } } if (mSelectedFilePaths.size() == 0) { // 取消选择状态 selectState = false; } } /** * 打开文件 * * @param file * 被打开文件的绝对路径 */ private void openFile(File file) { // Uri uri = Uri.parse("file://"+file.getAbsolutePath()); Intent intent = new Intent(); intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); // 设置intent的Action属性 intent.setAction(Intent.ACTION_VIEW); // 获取文件file的MIME类型 String type = getMIMEType(file); // 设置intent的data和Type属性。 intent.setDataAndType(/* uri */Uri.fromFile(file), type); // 跳转 startActivity(intent); } /** * 根据文件后缀名获得对应的MIME类型。 * * @param file * 文件的绝对路径 */ private String getMIMEType(File file) { String type = "*/*"; String fName = file.getName(); // 获取后缀名前的分隔符"."在fName中的位置。 int dotIndex = fName.lastIndexOf("."); if (dotIndex < 0) { return type; } /* 获取文件的后缀名 */ String end = fName.substring(dotIndex, fName.length()).toLowerCase(); if (end == "") return type; // 在MIME和文件类型的匹配表中找到对应的MIME类型。 for (int i = 0; i < MIME_MapTable.length; i++) { if (end.equals(MIME_MapTable[i][0])) type = MIME_MapTable[i][1]; } return type; } // 建立一个MIME类型与文件后缀名的匹配表 private final String[][] MIME_MapTable = { // {后缀名， MIME类型} { ".3gp", "video/3gpp" }, { ".apk", "application/vnd.android.package-archive" }, { ".asf", "video/x-ms-asf" }, { ".avi", "video/x-msvideo" }, { ".bin", "application/octet-stream" }, { ".bmp", "image/bmp" }, { ".c", "text/plain" }, { ".class", "application/octet-stream" }, { ".conf", "text/plain" }, { ".cpp", "text/plain" }, { ".doc", "application/msword" }, { ".exe", "application/octet-stream" }, { ".gif", "image/gif" }, { ".gtar", "application/x-gtar" }, { ".gz", "application/x-gzip" }, { ".h", "text/plain" }, { ".htm", "text/html" }, { ".html", "text/html" }, { ".jar", "application/java-archive" }, { ".java", "text/plain" }, { ".jpeg", "image/jpeg" }, { ".jpg", "image/jpeg" }, { ".js", "application/x-javascript" }, { ".log", "text/plain" }, { ".m3u", "audio/x-mpegurl" }, { ".m4a", "audio/mp4a-latm" }, { ".m4b", "audio/mp4a-latm" }, { ".m4p", "audio/mp4a-latm" }, { ".m4u", "video/vnd.mpegurl" }, { ".m4v", "video/x-m4v" }, { ".mov", "video/quicktime" }, { ".mp2", "audio/x-mpeg" }, { ".mp3", "audio/x-mpeg" }, { ".mp4", "video/mp4" }, { ".mpc", "application/vnd.mpohun.certificate" }, { ".mpe", "video/mpeg" }, { ".mpeg", "video/mpeg" }, { ".mpg", "video/mpeg" }, { ".mpg4", "video/mp4" }, { ".mpga", "audio/mpeg" }, { ".msg", "application/vnd.ms-outlook" }, { ".ogg", "audio/ogg" }, { ".pdf", "application/pdf" }, { ".png", "image/png" }, { ".pps", "application/vnd.ms-powerpoint" }, { ".ppt", "application/vnd.ms-powerpoint" }, { ".prop", "text/plain" }, { ".rar", "application/x-rar-compressed" }, { ".rc", "text/plain" }, { ".rmvb", "audio/x-pn-realaudio" }, { ".rtf", "application/rtf" }, { ".sh", "text/plain" }, { ".tar", "application/x-tar" }, { ".tgz", "application/x-compressed" }, { ".txt", "text/plain" }, { ".wav", "audio/x-wav" }, { ".wma", "audio/x-ms-wma" }, { ".wmv", "audio/x-ms-wmv" }, { ".wps", "application/vnd.ms-works" }, // {".xml", "text/xml"}, { ".xml", "text/plain" }, { ".z", "application/x-compress" }, { ".zip", "application/zip" }, { "", "*/*" } }; }
Adapter：
package com.example.zjc_file_choice.activity; import java.io.File; import java.util.List; import com.example.zjc_file_choice.R; import android.content.Context; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.BaseAdapter; import android.widget.ImageView; import android.widget.TextView; /** * 显示文件（夹）适配器 文件选择适配器 * * @author Zjc * @data 2015/02/06 * */ public class FileFolderAdapter extends BaseAdapter { private LayoutInflater mInflater; private Bitmap mIcon1; private Bitmap mIcon2; private Bitmap mIcon3; private Bitmap mIcon4; private List<String> items; private List<String> paths; public FileFolderAdapter(Context context, List<String> it, List<String> pa) { mInflater = LayoutInflater.from(context); items = it; paths = pa; mIcon1 = BitmapFactory.decodeResource(context.getResources(), R.drawable.ic_back_dir);// 返回根目录 mIcon2 = BitmapFactory.decodeResource(context.getResources(), R.drawable.ic_back_up);// 返回上一层 mIcon3 = BitmapFactory.decodeResource(context.getResources(), R.drawable.ic_folder);// 文件夹 mIcon4 = BitmapFactory.decodeResource(context.getResources(), R.drawable.ic_doc);// 文件 } @Override public int getCount() { return items.size(); } @Override public Object getItem(int position) { return items.get(position); } @Override public long getItemId(int position) { return position; } @Override public View getView(int position, View convertView, ViewGroup parent) { ViewHolder holder; if (convertView == null) { convertView = mInflater .inflate(R.layout.list_item_for_folder, null); holder = new ViewHolder(); holder.text = (TextView) convertView.findViewById(R.id.text); holder.icon = (ImageView) convertView.findViewById(R.id.icon); holder.selected = (ImageView) convertView .findViewById(R.id.selected); convertView.setTag(holder); } else { holder = (ViewHolder) convertView.getTag(); } File f = new File(paths.get(position).toString()); if (items.get(position).toString().equals("b1")) { holder.text.setText("返回根目录"); holder.icon.setImageBitmap(mIcon1); } else if (items.get(position).toString().equals("b2")) { holder.text.setText("返回上一层"); holder.icon.setImageBitmap(mIcon2); } else { holder.text.setText(f.getName()); if (f.isDirectory()) { holder.icon.setImageBitmap(mIcon3); } else { holder.icon.setImageBitmap(mIcon4); } } return convertView; } private class ViewHolder { TextView text; ImageView icon; ImageView selected; } }
XML文件：activity_file_manager.xml
<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:background="#FFFFFF" android:orientation="vertical" > <TextView android:id="@+id/mPath" android:layout_width="fill_parent" android:layout_height="50dp" android:padding="5dp" android:background="@android:color/darker_gray" android:layout_alignParentTop="true" android:textColor="#00ff00" android:text="目录：" android:gravity="center_vertical" android:textSize="18sp" > </TextView> <ListView android:layout_below="@+id/mPath" android:id="@android:id/list" android:layout_width="fill_parent" android:layout_height="wrap_content" android:listSelector="#9e9e9e" > </ListView> <LinearLayout android:visibility="gone" android:layout_alignParentBottom="true" android:layout_width="wrap_content" android:layout_height="wrap_content" android:background="#FFFFFF" android:gravity="center" android:orientation="horizontal" > <Button android:id="@+id/buttonConfirm" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="确定" /> <Button android:id="@+id/buttonCancle" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="取消" /> </LinearLayout> </RelativeLayout>
XML文件：list_item_for_folder.xml
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="45dp" android:background="#ffffff" android:orientation="horizontal" > <RelativeLayout android:layout_width="fill_parent" android:layout_height="45dp" android:layout_gravity="center_vertical" android:gravity="center_vertical" android:orientation="horizontal" android:padding="6dp" > <ImageView android:id="@+id/icon" android:layout_width="30dip" android:layout_height="30dip" android:layout_alignParentLeft="true" android:layout_centerVertical="true" android:layout_gravity="center_vertical" > </ImageView> <TextView android:id="@+id/text" android:layout_width="fill_parent" android:layout_height="fill_parent" android:layout_gravity="center_vertical" android:layout_marginLeft="10dp" android:layout_toRightOf="@+id/icon" android:gravity="center_vertical" android:layout_centerVertical="true" android:textColor="#000000" > </TextView> <ImageView android:id="@+id/selected" android:layout_width="20dip" android:layout_height="20dip" android:layout_alignParentRight="true" android:layout_centerVertical="true" android:layout_gravity="center_vertical" android:src="@drawable/pictures_selected" android:visibility="gone" > </ImageView> </RelativeLayout> </LinearLayout>
