得到文件的Mime Type方法

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找到文件，路径的Mime Type：

String extention = path.substring(path.lastIndexOf(.) );String mimeTypeMap = MimeTypeMap.getFileExtensionFromUrl(extention);String mimeType = MimeTypeMap.getSingleton().getMimeTypeFromExtension(mimeTypeMap);

例子：

package com.example.getfileextensionwithmimetype; import java.io.File;import java.util.ArrayList;import java.util.List; import android.app.ListActivity;import android.net.Uri;import android.os.Bundle;import android.os.Environment;import android.view.View;import android.webkit.MimeTypeMap;import android.widget.ArrayAdapter;import android.widget.ListView;import android.widget.Toast; public class GetFileExtensionWithMIMEType extends ListActivity { private List<String> fileList = new ArrayList<String>();    @Override   public void onCreate(Bundle savedInstanceState) {     super.onCreate(savedInstanceState);      File root = new File(Environment.getExternalStorageDirectory().getAbsolutePath());     ListDir(root);   }    @Override   protected void onListItemClick(ListView l, View v, int position, long id) {     // TODO Auto-generated method stub     File selected = new File(fileList.get(position));     if(selected.isDirectory()){       ListDir(selected);     }else {       Uri selectedUri = Uri.fromFile(selected);       String fileExtension= MimeTypeMap.getFileExtensionFromUrl(selectedUri.toString());       String mimeType = MimeTypeMap.getSingleton().getMimeTypeFromExtension(fileExtension);        Toast.makeText(GetFileExtensionWithMIMEType.this,"FileExtension: " + fileExtension + "n" +"MimeType: " + mimeType,Toast.LENGTH_LONG).show();     }  }  void ListDir(File f){   File[] files = f.listFiles();   fileList.clear();   for (File file : files){      fileList.add(file.getPath());   }   ArrayAdapter<String> directoryList = new ArrayAdapter<String>(this,   android.R.layout.simple_list_item_1, fileList);   setListAdapter(directoryList);  }}

效果图：

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