搜索一个目录下名字中有key的目录和文件

package irdc.ex04_11; /* import相关class */

import java.io.File;
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

public class EX04_11 extends Activity
{ /* 声明对象变量 */
private static final String TAG = "EX04_11";
private Button mButton;
//private Button mButton2;
private EditText mKeyword;
private TextView mResult;
String result;
File file;
File[] files = null;

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState); /* 载入main.xml Layout */
setContentView(R.layout.main); /* 初始化对象 */
mKeyword = (EditText) findViewById(R.id.mKeyword);
mButton = (Button) findViewById(R.id.mButton);
//mButton2 = (Button) findViewById(R.id.mButton2);
mResult = (TextView) findViewById(R.id.mResult); /* 将mButton加入onClickListener */
result = "";
file = new File("/mnt");
mButton.setOnClickListener(new Button.OnClickListener()
{
public void onClick(View v)
{ /* 取得输入的关键词 */
if(mButton.getText().toString().equals(getString(R.string.str_button))){
String keyword = mKeyword.getText().toString();
if (keyword.equals(""))
{
mResult.setText("请勿输入空白的关键词!!");
} else
{
mButton.setText(getString(R.string.str_button2).toString());
Log.i(TAG,"str_button2 " + mButton.getText());
mResult.setText(searchFile2(file,keyword));
}

}
else{
android.os.Process.killProcess(android.os.Process.myPid());
}
mButton.setText(getString(R.string.str_button));
}
});

/*mButton2.setOnClickListener(new Button.OnClickListener(){

@Override
public void onClick(View v)
{
//Log.i(TAG,"mypid " + android.os.Process.myPid());
android.os.Process.killProcess(android.os.Process.myPid());
//mButton2.setEnabled(false);
mButton.setEnabled(true);
}});*/
}

/* 搜索文件的method */
/*  private String searchFile(String keyword)
{

String result = "";
File[] files = new File("/").listFiles();
for (File f : files)
{
if(f.isDirectory()){
Log.i(TAG,"f.getPath() " + f.getPath());
//searchFile(f.getPath());

}
if (f.getName().indexOf(keyword) >= 0)
{
result += f.getPath() + "\n";
}
}
if (result.equals(""))
result = "找不到文件!!";
return result;
}*/

private String searchFile2(File path,String keyword)
{
//Log.i(TAG,"mypid1 " + android.os.Process.myPid());
if(path.canRead()){
files = path.listFiles();
//Log.i(TAG,"files " + files);
for (File f : files)
{
if (f.getName().indexOf(keyword) >= 0)
{
result += f.getPath() + "\n";
//Log.i(TAG,"result " + result);
}

if(f.isDirectory()){
//Log.i(TAG,"f.getPath() " + f.getPath());
searchFile2(f,keyword);
}

if (result.equals(""))
result = "找不到文件!!";
}
}
return result;
}
}