目的：输入关键字KEY，sd卡中文件名包含KEY的文件路径显示在屏幕下方，如果没有，则toast提示，整个实现过程还是比较简单的。
思路： EditText -- > button(onClick) --> getText -->ListFiles ? indexof -- > show
main.xml
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<?xml version="1.0" encoding="utf-8"?><AbsoluteLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" android:id="@+id/widget0" > <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/button_search" android:layout_x="253px" android:layout_y="5px" android:text="@string/toSearch"/><EditText android:layout_width="112px" android:layout_height="52px" android:id="@+id/key" android:textSize="18sp" android:layout_x="119px" android:layout_y="4px"/><TextView android:layout_width="103px" android:layout_height="29px" android:id="@+id/TextView_showIn" android:layout_x="5px" android:layout_y="16px" android:textSize="20sp" android:text="@string/showInput"/><TextView android:layout_width="fill_parent" android:layout_height="370px" android:id="@+id/TextView_Result" android:layout_x="0px" android:layout_y="60px"/></AbsoluteLayout>
? Activity类内容
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package com.android;import java.io.File;import android.app.Activity;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.EditText;import android.widget.TextView;import android.widget.Toast;// extends Activtiy //implements OnClickListener 实现click方法public class Activity07 extends Activity implements OnClickListener { /** Called when the activity is first created. */ private File file; private String path; private String info; private String key; //关键字 private TextView result; // 显示结果 private EditText et; // 编辑view private Button search_btn; // button view @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); result = (TextView)findViewById(R.id.TextView_Result); et = (EditText)findViewById(R.id.key); search_btn = (Button)findViewById(R.id.button_search); // file = new File(Environment.getExternalStorageDirectory().getPath()); file = new File("/sdcard/mp3"); info = getString(R.string.info); search_btn.setOnClickListener(this); } /* (non-Javadoc) * @see android.view.View.OnClickListener#onClick(android.view.View) */ @Override public void onClick(View v) { // TODO Auto-generated method stub path = ""; result.setText(""); key = et.getText().toString(); BrowserFile(file); } /** * 校验 toast提示 * @param file */ public void BrowserFile(File file) { if (key.equals("")) { Toast.makeText(this, getString(R.string.pleaseInput), Toast.LENGTH_LONG).show(); } else { toSearchFiles(file); if (result.getText().equals("")) { Toast.makeText(this, getString(R.string.notFound), Toast.LENGTH_SHORT).show(); } } } /** * 遍历 Files * @param file */ public void toSearchFiles(File file) { File[] files = file.listFiles(); for (File tf : files) { if (tf.isDirectory()) { toSearchFiles(tf); } else { try { if (tf.getName().indexOf(key) > -1) { path += "\n" + tf.getPath(); result.setText(info+path); } } catch(Exception e) { Toast.makeText(this, getString(R.string.pathError), Toast.LENGTH_SHORT).show(); } } } }}? String.xml
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<?xml version="1.0" encoding="utf-8"?><resources> <string name="hello">Hello World, Activity07!</string> <string name="app_name">文件搜索</string> <string name="showInput">输入关键字</string> <string name="toSearch">搜索</string> <string name="info">系统SDCard目录文件路径：\n</string> <string name="pleaseInput">请输入关键字!</string> <string name="notFound">SD卡中没有相关文件!!</string> <string name="pathError">读取路径出错!!</string></resources>
查看SD卡MP3下的文件列表
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效果
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