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我们。