android文件搜索_移动开发_编程开发_程序员俱乐部

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

<?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

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

<?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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