Android手机文件管理-白红宇

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Android手机文件管理

阅读量：5748 次

发布时间：2019-06-18

本文共 9021 字，大约阅读时间需要 30 分钟。

MyAdapter.java

1 package com.testview; 2  3 import java.util.List; 4 import java.util.Map; 5  6 import android.content.Context; 7 import android.graphics.Color; 8 import android.view.LayoutInflater; 9 import android.view.View;10 import android.view.ViewGroup;11 import android.widget.BaseAdapter;12 import android.widget.TextView;13 14 public class MyAdapter extends BaseAdapter {15     private LayoutInflater mInflater;16     private List
       
        >mData ;17     private int  selectItem=-1;18     private int[] layout;19     public MyAdapter(Context context, List
        
         
          >mData, int[] layout) {20      this.mInflater = LayoutInflater.from(context);21      this.mData = mData;22      this.layout = layout;23     }24     public int getCount() {25      return mData.size();26     }27     public Object getItem(int arg0) {28      return mData.get(arg0);29     }30     public long getItemId(int arg0) {31      return arg0;32     }33     public View getView(int position, View convertView, ViewGroup parent) {34      ViewHolder holder = null;35      if (convertView == null) {36       holder = new ViewHolder();37       convertView = mInflater.inflate(layout[0], null);38       holder.titleText = (TextView) convertView.findViewById(layout[1]);39       holder.infoText = (TextView) convertView.findViewById(layout[2]);40       41       convertView.setTag(holder);   42      } else {43       holder = (ViewHolder) convertView.getTag();44      }45      holder.titleText.setText((String) mData.get(position).get("title"));46      holder.infoText.setText((String) mData.get(position).get("info"));   47      48      if (position == selectItem) {49       convertView.setBackgroundColor(0xaeefcc00);50      } 51      else {52          convertView.setBackgroundColor(Color.BLACK);53      }54      convertView.getBackground().setAlpha(20);//0~255透明度值55      return convertView;56     }57     public  void setSelectItem(int selectItem) {58       this.selectItem = selectItem;59     }60 61 }

TestListViewActivity .java

1 package com.testview;  2   3 import java.io.File;  4 import java.util.ArrayList;  5 import java.util.Arrays;  6 import java.util.HashMap;  7 import java.util.List;  8 import java.util.Map;  9 import com.util.SDUtil; 10 import android.app.Activity; 11 import android.app.AlertDialog; 12 import android.os.Bundle; 13 import android.os.Environment; 14 import android.view.KeyEvent; 15 import android.view.View; 16 import android.view.View.OnClickListener; 17 import android.widget.AdapterView; 18 import android.widget.EditText; 19 import android.widget.ImageButton; 20 import android.widget.ListView; 21  22 public class TestListViewActivity extends Activity { 23     /** 24      * 数据存储 25      */ 26     private List
       
        > mData; 27      28     /** 29      * 当前访问路径 30      */ 31     private String currentPath = "/sdcard"; 32      33     private ListView setlistViewLeft; 34     /** 35      * 自定义数据适配器 36      */ 37     private MyAdapter adapter; 38      39     /** 40      * 文件名称 41      */ 42     private String[] fileNames = null; 43      44     /** 45      * 文件路径 46      */ 47     private String[] filePaths = null; 48      49     private EditText editText; 50     private ImageButton imageBtn; 51      52     private int[] layout = { 53             R.layout.listinfo,  54             R.id.titleleftlist,  55             R.id.infoleftlist 56             }; 57      58     @Override 59     public void onCreate(Bundle savedInstanceState) { 60      super.onCreate(savedInstanceState); 61      setContentView(R.layout.main); 62      setTitle("文件总数："+getSDCardMassage(currentPath)+"\n"+"当前路径："+currentPath); 63      getSearchKey(); 64      mData = getListItems();   65      setlistViewLeft = (ListView)findViewById(R.id.listleft);  66      adapter = new MyAdapter(this, mData, layout); 67      setlistViewLeft.setAdapter(adapter); 68      setlistViewLeft.setOnItemClickListener(mLeftListOnItemClick); 69     } 70      71     /** 72      * 初始化数据 73      */ 74     public void getSearchKey(){ 75         editText = (EditText) findViewById(R.id.entry); 76         imageBtn = (ImageButton) findViewById(R.id.btn_imageButton); 77         imageBtn.setOnClickListener(new OnClickListener() { 78              79             @Override 80             public void onClick(View v) { 81                 String searchKey = editText.getText().toString(); 82                 if(searchKey == null || "".equals(searchKey)){ 83                     return; 84                 } 85                 int length = fileNames.length; 86                 String[] strKeyName = {}; 87                 String[] strKeyPath = {}; 88                 for(int i = 0; i < length; i++){ 89                     String name = fileNames[i]; 90                     if(name.contains(searchKey)){ 91                         strKeyName = Arrays.copyOf(strKeyName, strKeyName.length+1); 92                         strKeyPath = Arrays.copyOf(strKeyPath, strKeyPath.length+1); 93                         strKeyName[strKeyName.length-1] = name; 94                         strKeyPath[strKeyPath.length-1] = filePaths[i]; 95                     } 96                 } 97                 if(strKeyName.length > 0){ 98                     //初始化数据 99                     setSearchKeyData(strKeyName, strKeyPath);100                     101                 }else{102                 new AlertDialog.Builder(TestListViewActivity.this)103                      .setTitle("消息")104                      .setMessage("文件不存在")105                      .setPositiveButton("确定", null)106                      .show();107                 }108             }109 110             111         });112     }113     114     /**115      * 初始化搜索数据116      * @param strKeyName117      * @param strKeyPath118      */119     private void setSearchKeyData(String[] strKeyName, String[] strKeyPath) {120         fileNames = strKeyName;121         filePaths = strKeyPath;122         mData = getListItems();123         setTitle("文件总数："+strKeyName.length+"\n"+"当前路径："+currentPath);124         initAdapter();125     }126     127     /**128      * 初始化数据129      * @param path 文件路径130      */131     public void initData(String path){132         currentPath = path;133         setTitle("文件总数："+getSDCardMassage(path)+" "+currentPath);134         mData = getListItems();135         editText.setText(null);136         initAdapter();137     }138     139     public void initAdapter(){140         setlistViewLeft = (ListView)findViewById(R.id.listleft);141         adapter = new MyAdapter(this, mData, layout);142         setlistViewLeft.setAdapter(adapter);143         setlistViewLeft.setOnItemClickListener(mLeftListOnItemClick);144     }145     146     private List
        
         
          > getListItems(){147         List
          
           
            > listItems = new ArrayList
            
             
              >();148 for(int i=0;i
              
                map = new HashMap
               
                ();150 map.put("title", "文件名称");151 map.put("info", fileNames[i]);152 listItems.add(map);153 }154 return listItems;155 }156 157 AdapterView.OnItemClickListener mLeftListOnItemClick = new AdapterView.OnItemClickListener() {158 159 @Override160 public void onItemClick(AdapterView
                 arg0, View arg1, int arg2,161 long arg3) {162 163 adapter.setSelectItem(arg2);164 adapter.notifyDataSetInvalidated();165 String v2 = mData.get(arg2).get("info").toString();166 String str = filePaths[arg2];167 if(str != null){168 //重新初始化界面169 mData.clear();170 currentPath = str;171 initData(str);172 }else{173 SDUtil.openFile(TestListViewActivity.this, currentPath+"/"+v2);174 }175 176 }177 178 };179 /**180 * 重写手机返回键事件 181 */182 public boolean onKeyDown(int keyCode, android.view.KeyEvent event) {183 if(keyCode == KeyEvent.KEYCODE_BACK ){184 back();185 return true;186 }187 return super.onKeyDown(keyCode, event);188 };189 190 /**191 * 返回数据初始化192 */193 private void back() {194 String path = new File(currentPath).getParentFile().getPath();195 if("/sdcard".equals(currentPath)){196 finish();197 return;198 }199 initData(path);200 }201 202 /**203 * 获取SD卡文件204 * @param path205 * @return206 */207 public int getSDCardMassage(String path){208 boolean flag = Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED);209 if(flag){210 if(SDUtil.isExistFiles(path)){211 File f = new File(path);212 File[] files = f.listFiles();213 int size = files.length;214 fileNames = new String[size];215 filePaths = new String[size];216 for(int i = 0; i < size; i++ ){217 File exitFile = files[i];218 if(exitFile.exists()){219 fileNames[i] = exitFile.getName();220 if(SDUtil.isExistFiles(exitFile.getAbsolutePath()))221 filePaths[i] = exitFile.getAbsolutePath();222 else 223 filePaths[i] = null;224 }225 }226 return size;227 }228 }229 return 0;230 }231 }

main.xml

listinfo.xml

界面展示如下：

转载于:https://www.cnblogs.com/FCWORLD/archive/2012/10/18/2729949.html

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