本文实例为大家分享了android遍历所有文件夹和子目录来搜索文件，供大家参考，具体内容如下

java代码：

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;public class ShuosouwenjianActivity extends Activity implements OnClickListener { 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/"); info = getString(R.string.info); search_btn.setOnClickListener(this); } @Override public void onClick(View v) { // TODO Auto-generated method stub path = ""; result.setText(""); key = et.getText().toString(); BrowserFile(file); } public void BrowserFile(File fileold) { if (key.equals("")) { Toast.makeText(this, getString(R.string.pleaseInput), Toast.LENGTH_LONG).show(); } else { search(fileold); if (result.getText().equals("")) { Toast.makeText(this, getString(R.string.notFound), Toast.LENGTH_SHORT).show(); } } } private void search(File fileold) { try{ File[] files=fileold.listFiles(); if(files.length>0) { for(int j=0;j<files.length;j++) { if(!files[j].isDirectory()) { if(files[j].getName().indexOf(key)> -1) { path += "\n" + files[j].getPath(); result.setText(info+path); //shuju.putString(files[j].getName().toString(),files[j].getPath().toString()); } } else{ this.search(files[j]); } } } } catch(Exception e) { } }}

MAIN.XML代码：

<?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="wrap_content" android:layout_height="wrap_content" android:id="@+id/key" android:text="821077962.db" /> <TextView android:layout_width="fill_parent" android:layout_height="370px" android:id="@+id/TextView_Result" android:layout_x="0px" android:layout_y="60px" /> </AbsoluteLayout>

strings.xml代码:

<?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="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>

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。