Android遍历所有文件夹和子目录搜索文件

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。