Android-取出SDcard卡下指定后缀名的文件

Android--取出SDcard卡上指定后缀名的文件 

1.

import java.io.File;
import java.io.FilenameFilter;


/**
 * 后缀名过滤器
 * @author ZLQ
 *
 */
public class FileNameSelector implements FilenameFilter{
 String extension = ".";
 public FileNameSelector(String fileExtensionNoDot) {
  extension += fileExtensionNoDot;
 }
 
 public boolean accept(File dir, String name) {
  return name.endsWith(extension);
 }
}

 

2.

public class AndroidSdCardActivity extends Activity {
 /** Called when the activity is first created. */
 @Override
 public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.main);
  getName();
 } 

 /**
  * 得到以mp3结尾的文件
  */
 public void getName(){
  File file = Environment.getExternalStorageDirectory();
  if(file != null){
   File[] files = file.listFiles(new FileNameSelector("mp3"));
   for(int i = 0; i < files.length; ++i){
    Log.i("System.out", files[i].getName());
   }
  }
 }
}