得到文件的Mime Type方法

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：