第二章:java I/O应用
效果：
main。xml
package i.o.test;import java.io.File;import android.app.Activity;import android.os.Bundle;import android.view.View;import android.widget.Button;import android.widget.EditText;import android.widget.TextView;public class IOTest extends Activity { /** Called when the activity is first created. */private Button bt;private EditText text;private TextView message; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); bt=(Button)findViewById(R.id.search); text=(EditText)findViewById(R.id.text); message=(TextView)findViewById(R.id.message); bt.setOnClickListener(new Button.OnClickListener(){ public void onClick(View v){ String str=text.getText().toString(); if(str.equals("")){ message.setText("输入内容不能为空！"); }else{ message.setText(searchFile(str)); } } }); } public String searchFile(String str){ String result=""; File[] fils=new File("/").listFiles(); for(File f:fils){ if(f.getName().indexOf(str)>=0){ result=result+f.getPath()+"\n"; } } if(result.equals("")){ result="没有该文件！"; }return result; }}
