hzuapps#90 hzuapps#94 hzuapps#95 hzuapps#172 ----lab4-lab9

app/src/main/java/edu/hzuapps/androidworks/homeworks/com1314080901125/AndroidManifest.xml

@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="edu.hzuapp.androidworks.homeworks.com1314080901125">
+    <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"/>
+    <!-- 往SDCard写入数据权限 -->
+    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
+    <!--  从SDCard读取数据权限 -->
+    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
+
+    <application
+        android:allowBackup="true"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:supportsRtl="true"
+        android:theme="@style/AppTheme">
+        <activity android:name=".Com1314080901125Activity">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+
+</manifest>

app/src/main/java/edu/hzuapps/androidworks/homeworks/com1314080901125/Com1314080901125Activity.java

@@ -1,13 +1,274 @@
-package com.hzu.vince.myfilemanager;
+package edu.hzuapp.androidworks.homeworks.com1314080901125;
 
-import android.support.v7.app.AppCompatActivity;
+import android.content.Context;
+import android.content.DialogInterface;
 import android.os.Bundle;
+import android.os.Environment;
+import android.support.v7.app.AlertDialog;
+import android.support.v7.app.AppCompatActivity;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.AdapterView;
+import android.widget.BaseAdapter;
+import android.widget.Button;
+import android.widget.ImageButton;
+import android.widget.ImageView;
+import android.widget.ListView;
+import android.widget.TextView;
+import android.widget.Toast;
+
+import java.io.File;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+public class Com1314080901125Activity extends AppCompatActivity implements View.OnClickListener{
 
-public class Com1314080901125Activity extends AppCompatActivity {
+    private File currentDirFile;
+    private File[] fileList;
+    private ListView myListView;
+    private TextView showMyDir;
+    private List<Map<String, Object>> CurrentFiles;
+    private static String targetDir = "/"; //启动默认进入根目录
+    private Button btn1,btn2,btn_quit;
+    private ImageButton btn_back;
+    Toast toast;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_com1314080901125);
+        btn1 = (Button)findViewById(R.id.button1);
+        btn2 = (Button)findViewById(R.id.button2);
+        btn_quit =(Button)findViewById(R.id.button_quit);
+        btn_back = (ImageButton)findViewById(R.id.back);
+        btn1.setOnClickListener(this);
+        btn2.setOnClickListener(this);
+        btn_quit.setOnClickListener(this);
+        btn_back.setOnClickListener(this);
+        showMyDir = (TextView)findViewById(R.id.MyDir);
+        showMyDir.setText(targetDir);
+        myListView = (ListView)findViewById(R.id.listView);
+        myListView.setAdapter(new myListAdapter(this));
+        myListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
+            @Override
+            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
+                if ((int)CurrentFiles.get(position).get("icon")==R.drawable.ic_directory){
+                    targetDir = (String)CurrentFiles.get(position).get("fileDir");
+                    showMyDir.setText(targetDir);
+                    myListView.setAdapter(new myListAdapter(getApplicationContext()));
+                }
+                else{
+                    if ((int)CurrentFiles.get(position).get("icon")==R.drawable.ic_file)
+                    showTipBox("这是一个文件");
+                }
+            }
+        });
+        myListView.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
+            @Override
+            public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long id) {
+                //长按监听
+                if ((int)CurrentFiles.get(position).get("icon")==R.drawable.ic_file){
+                    //弹出选项框
+                    final String[] items = getResources().getStringArray(R.array.items);
+                    showDeleteBox(items);
+                }
+                return true;
+            }
+        });
+    }
+
+    private class ListItem {
+        public ImageView icon;
+        public TextView fileName;
+        public TextView fileDir;
+    }
+
+    private List<Map<String, Object>> GetCurrentFiles(String targetDir){
+        if (targetDir.equals("/")){
+            currentDirFile=new File("/");
+            fileList=currentDirFile.listFiles();
+        }
+        else if (targetDir.equals("/storage")){
+            boolean existed= Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED);
+            if(existed){
+                //currentDirFile = Environment.getExternalStorageDirectory();//这个现在仅获取得到手机自带存储卡
+                currentDirFile = new File("/storage");
+                fileList = currentDirFile.listFiles();
+            }
+            else
+                showTipBox("SD卡不存在");
+        }
+        else{
+            currentDirFile=new File(targetDir);
+            fileList=currentDirFile.listFiles();
+        }
+
+        List<Map<String, Object>> list = new ArrayList<Map<String, Object>>();
+        Map<String, Object> map = null;
+        if (!targetDir.equals("/")){
+                map = new HashMap<>();
+                map.put("fileName","back to ../");
+                map.put("fileDir",currentDirFile.getParent());
+                map.put("icon",R.drawable.ic_directory);
+                list.add(map);
+        }
+        if(fileList!=null){
+            for (int i = 0; i < fileList.length; i++) {
+                map = new HashMap<String, Object>();
+                map.put("fileName", fileList[i].getName());
+                map.put("fileDir",fileList[i].getPath());
+                if (fileList[i].isDirectory())
+                    map.put("icon", R.drawable.ic_directory);
+                else
+                    map.put("icon", R.drawable.ic_file);
+                list.add(map);
+            }
+        }
+        return list;
+    }
+
+    private class myListAdapter extends BaseAdapter {
+        private Context myContext;
+        private LayoutInflater inflater;
+        public myListAdapter(Context myContext) {
+            this.myContext = myContext;
+            inflater = LayoutInflater.from(myContext);
+        }
+
+        @Override
+        public int getCount() {
+            return GetCurrentFiles(targetDir).size();
+        }
+
+        @Override
+        public Object getItem(int position) {
+            return null;
+        }
+
+        @Override
+        public long getItemId(int position) {
+            return 0;
+        }
+
+        @Override
+        public View getView(int position, View convertView, ViewGroup parent) {
+            ListItem itemHolder = null;
+            CurrentFiles = GetCurrentFiles(targetDir);
+            if(convertView==null){
+                itemHolder=new ListItem();
+                convertView = inflater.inflate(R.layout.list_item_view, null);
+                itemHolder.icon = (ImageView) convertView.findViewById(R.id.imageView);
+                itemHolder.fileName = (TextView) convertView.findViewById(R.id.fileName);
+                itemHolder.fileDir = (TextView) convertView.findViewById(R.id.fileDir);
+                convertView.setTag(itemHolder);
+            } else {
+                itemHolder = (ListItem) convertView.getTag();
+            }
+            itemHolder.icon.setBackgroundResource((Integer) CurrentFiles.get(position).get("icon"));
+            itemHolder.fileName.setText((String) CurrentFiles.get(position).get("fileName"));
+            itemHolder.fileDir.setText((String) CurrentFiles.get(position).get("fileDir"));
+
+            return convertView;
+        }
+    }
+
+    @Override
+    public void onClick(View v) {
+        switch (v.getId()){
+            case R.id.button1:
+                toast = Toast.makeText(this,"进入根目录",Toast.LENGTH_SHORT);
+                toast.show();
+                targetDir = "/";
+                myListView.setAdapter(new myListAdapter(this));
+                showMyDir.setText(targetDir);//同时更新当前路径的显示
+                break;
+            case R.id.button2:
+                toast = Toast.makeText(this,"进入SD卡",Toast.LENGTH_SHORT);
+                toast.show();
+                targetDir = "/storage";
+                myListView.setAdapter(new myListAdapter(this));
+                showMyDir.setText(targetDir);
+                break;
+            case R.id.button_quit:
+                showQuitBox("确定退出应用？");
+                break;
+            case R.id.back:
+                if (!targetDir.equals("/")) {
+                    //更新返回的目录列表
+                    File file = new File(targetDir);
+                    targetDir = file.getParent();
+                    myListView.setAdapter(new myListAdapter(this));
+                    showMyDir.setText(targetDir);
+                }
+                else {
+                    showQuitBox("已是最顶层目录，是否退出管理器？");
+                }
+        }
+    }
+
+    public void showTipBox(String tip) {
+        new AlertDialog.Builder(this)
+                .setTitle("提示")
+                .setMessage(tip)
+                .setPositiveButton("OK", null)
+                .show();
+    }
+
+    public void showQuitBox(String tip){
+        new AlertDialog.Builder(this)
+                .setTitle("提示")
+                .setMessage(tip)
+                .setPositiveButton("确定", new DialogInterface.OnClickListener() {
+                    @Override
+                    public void onClick(DialogInterface dialog, int which) {
+                        dialog.dismiss();
+                        finish();
+                        System.exit(0);
+                    }
+                })
+                .setNegativeButton("取消", new DialogInterface.OnClickListener() {
+                    @Override
+                    public void onClick(DialogInterface dialog, int which) {
+                        dialog.dismiss();
+                    }
+                })
+                .show();
+    }
+
+    public void showDeleteBox(final String[] items){
+        new AlertDialog.Builder(this)
+                .setTitle("选项")
+                .setItems(items,new DialogInterface.OnClickListener(){
+                    @Override
+                    public void onClick(DialogInterface dialog, int which) {
+                        switch (items[which]){
+                            case "删除文件":
+                                dialog.dismiss();
+                                new AlertDialog.Builder(Com1314080901125Activity.this)
+                                        .setTitle("提示")
+                                        .setPositiveButton("确定", new DialogInterface.OnClickListener() {
+                                            @Override
+                                            public void onClick(DialogInterface dialog, int which) {
+                                                File f = new File(targetDir);
+                                                if (f.exists()) {
+                                                    System.out.println("文件存在");
+                                                    if (f.delete())   //删除不了，仍在找原因
+                                                        System.out.println("删除文件成功");
+                                                    else System.out.println("删除失败");
+                                                }
+                                            }
+                                        })
+                                        .setNegativeButton("取消",null)
+                                        .show();
+                                break;
+                            //case 2
+                        }
+                    }
+                })
+                .setNegativeButton("取消",null)
+                .show();
     }
 }