android 查找所有文件下面的某个文件



final EditText text1 =(EditText) findViewById(R.id.editText1);
  Button bt = (Button) findViewById(R.id.button1);
  final TextView tv = (TextView) findViewById(R.id.aimi);
  bt.setOnClickListener(new OnClickListener() {
   @Override
   public void onClick(View v) {
    String str = text1.getText().toString();
    tv.setText(getResult(str));
   }
  });
 }
 protected CharSequence getResult(String str) {
  String result="";
  File [] files = new File("/").listFiles();
  for(File f:files){
   if(f.getName().indexOf(str)>=0){
    result+=f.getPath()+"\n";
   }
  }
  if(result.equals("")) result="找不到文件";
  return result;
 }