android之遍历所有文件夹和子目录搜索文件

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android学习笔记之遍历所有文件夹和子目录搜索文件

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"

/>

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>

转载网址：http://blog.sina.com.cn/s/blog_4ac183220100y0ex.html

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