hometask 5

app/build.gradle

@@ -21,4 +21,6 @@ android {
 
 dependencies {
     compile 'com.android.support:appcompat-v7:23.2.1'
+    compile 'com.android.support:cardview-v7:21.0.+'
+    compile 'com.android.support:recyclerview-v7:21.0.+'
 }

app/src/main/AndroidManifest.xml

@@ -1,14 +1,17 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    package="com.csc.lesson5">
+    package="com.csc.malinovsky239.filemanager">
+
+    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
+    <uses-permission android:name="android.permission.WRITE_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=".MainActivity">
+        <activity android:name="MainActivity">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
 

app/src/main/java/com/csc/malinovsky239/filemanager/FileListAdapter.java

@@ -0,0 +1,171 @@
+package com.csc.malinovsky239.filemanager;
+
+import android.app.AlertDialog;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.content.Intent;
+import android.net.Uri;
+import android.os.Environment;
+import android.support.v7.widget.CardView;
+import android.support.v7.widget.RecyclerView;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.EditText;
+import android.widget.ImageView;
+import android.widget.TextView;
+
+import java.io.File;
+import java.util.ArrayList;
+import java.util.List;
+
+public class FileListAdapter extends RecyclerView.Adapter<FileListAdapter.ItemViewHolder> {
+
+    private final Context context;
+    List<FileSystemItem> items = new ArrayList<>();
+    private String currentWorkingDirectory;
+    private final OnItemClickListener listener = new OnItemClickListener() {
+        @Override
+        public void onItemClick(FileSystemItem item) {
+            if (item.isFolder()) {
+                if (item.getTitle().equals("...")) {
+                    currentWorkingDirectory = currentWorkingDirectory.substring(0, currentWorkingDirectory.lastIndexOf('/'));
+                } else {
+                    currentWorkingDirectory = new File(new File(currentWorkingDirectory), item.getTitle()).toString();
+                }
+                clear();
+                File[] listFiles = (new File(currentWorkingDirectory)).listFiles();
+                for (File file : listFiles) {
+                    addItem(file.getName(), file.isDirectory());
+                }
+                notifyDataSetChanged();
+            } else {
+                Intent myIntent = new Intent(android.content.Intent.ACTION_VIEW);
+                File file = new File(currentWorkingDirectory);
+                File file2 = new File(file, item.getTitle());
+                String extension = android.webkit.MimeTypeMap.getFileExtensionFromUrl(Uri.fromFile(file2).toString());
+                String mimeType = android.webkit.MimeTypeMap.getSingleton().getMimeTypeFromExtension(extension);
+                myIntent.setDataAndType(Uri.fromFile(file2), mimeType);
+                context.startActivity(myIntent);
+            }
+        }
+
+        @Override
+        public void onItemLongClick(final FileSystemItem item) {
+            AlertDialog.Builder builder = new AlertDialog.Builder(context);
+            builder.setTitle("")
+                    .setMessage("")
+                    .setPositiveButton(R.string.rename_button, new DialogInterface.OnClickListener() {
+                        @Override
+                        public void onClick(DialogInterface dialog, int which) {
+                            AlertDialog.Builder builder = new AlertDialog.Builder(context);
+                            builder.setTitle(R.string.rename_button);
+                            final EditText input = new EditText(context);
+                            builder.setView(input);
+
+                            builder.setPositiveButton(R.string.OK_button, new DialogInterface.OnClickListener() {
+                                @Override
+                                public void onClick(DialogInterface dialog, int which) {
+                                    String newName = input.getText().toString();
+                                    File from = new File(currentWorkingDirectory, item.getTitle());
+                                    File to = new File(currentWorkingDirectory, newName);
+                                    if (from.renameTo(to)) {
+                                        item.setTitle(newName);
+                                        notifyDataSetChanged();
+                                    }
+                                }
+                            });
+                            builder.setNegativeButton(R.string.cancel_button, new DialogInterface.OnClickListener() {
+                                @Override
+                                public void onClick(DialogInterface dialog, int which) {
+                                    dialog.cancel();
+                                }
+                            });
+
+                            builder.show();
+                        }
+                    })
+                    .setNeutralButton(R.string.delete_button, new DialogInterface.OnClickListener() {
+                        @Override
+                        public void onClick(DialogInterface dialog, int which) {
+                            File file = new File(currentWorkingDirectory, item.getTitle());
+                            if (file.delete()) {
+                                items.remove(item);
+                                notifyDataSetChanged();
+                            }
+                        }
+                    });
+            AlertDialog alert = builder.create();
+            alert.show();
+        }
+    };
+
+    public FileListAdapter(Context context) {
+        this.context = context;
+        currentWorkingDirectory = Environment.getExternalStorageDirectory().toString();
+    }
+
+    public void clear() {
+        items.clear();
+        if (!currentWorkingDirectory.equals(context.getString(R.string.root))) {
+            addItem("...", true);
+        }
+    }
+
+    public void addItem(String title, boolean isFolder) {
+        items.add(new FileSystemItem(title, isFolder));
+    }
+
+    @Override
+    public ItemViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
+        View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.item, parent, false);
+        v.setLayoutParams(new RecyclerView.LayoutParams(RecyclerView.LayoutParams.MATCH_PARENT, RecyclerView.LayoutParams.MATCH_PARENT));
+        return new ItemViewHolder(v);
+    }
+
+    @Override
+    public void onBindViewHolder(ItemViewHolder holder, int position) {
+        holder.filename.setText(items.get(position).getTitle());
+        if (items.get(position).isFolder()) {
+            holder.icon.setImageResource(R.drawable.folder);
+        } else {
+            holder.icon.setImageResource(R.drawable.file);
+        }
+        holder.bind(items.get(position), listener);
+    }
+
+    @Override
+    public int getItemCount() {
+        return items.size();
+    }
+
+    public class ItemViewHolder extends RecyclerView.ViewHolder {
+        CardView item;
+        TextView filename;
+        ImageView icon;
+
+        ItemViewHolder(View itemView) {
+            super(itemView);
+            item = (CardView) itemView.findViewById(R.id.item);
+            filename = (TextView) itemView.findViewById(R.id.filename);
+            icon = (ImageView) itemView.findViewById(R.id.icon);
+        }
+
+        public void bind(final FileSystemItem fileSystemItem, final OnItemClickListener listener) {
+            itemView.setOnClickListener(new View.OnClickListener() {
+                @Override
+                public void onClick(View v) {
+                    listener.onItemClick(fileSystemItem);
+                }
+            });
+            itemView.setOnLongClickListener(new View.OnLongClickListener() {
+                @Override
+                public boolean onLongClick(View v) {
+                    listener.onItemLongClick(fileSystemItem);
+                    return true;
+                }
+            });
+        }
+    }
+
+}

app/src/main/java/com/csc/malinovsky239/filemanager/FileSystemItem.java

@@ -0,0 +1,26 @@
+package com.csc.malinovsky239.filemanager;
+
+/**
+ * Created by malinovsky239 on 28.03.2016.
+ */
+public class FileSystemItem {
+    private String title;
+    private boolean isFolder;
+
+    FileSystemItem(String title, boolean isFolder) {
+        this.title = title;
+        this.isFolder = isFolder;
+    }
+
+    public String getTitle() {
+        return title;
+    }
+
+    public void setTitle(String title) {
+        this.title = title;
+    }
+
+    public boolean isFolder() {
+        return isFolder;
+    }
+}

app/src/main/java/com/csc/malinovsky239/filemanager/MainActivity.java

@@ -0,0 +1,75 @@
+package com.csc.malinovsky239.filemanager;
+
+import android.Manifest;
+import android.content.pm.PackageManager;
+import android.os.Build;
+import android.os.Bundle;
+import android.os.Environment;
+import android.support.v4.app.ActivityCompat;
+import android.support.v4.content.ContextCompat;
+import android.support.v7.app.AppCompatActivity;
+import android.support.v7.widget.LinearLayoutManager;
+import android.support.v7.widget.RecyclerView;
+
+import java.io.File;
+
+public class MainActivity extends AppCompatActivity {
+
+    final int READ_WRITE_PERMISSION_CODE = 200;
+    private RecyclerView fileList;
+    private FileListAdapter adapter;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        setContentView(R.layout.main_activity);
+        fileList = (RecyclerView) findViewById(R.id.file_list);
+        LinearLayoutManager llm = new LinearLayoutManager(this);
+        fileList.setLayoutManager(llm);
+
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
+            if (ContextCompat.checkSelfPermission(this,
+                    Manifest.permission.READ_EXTERNAL_STORAGE)
+                    != PackageManager.PERMISSION_GRANTED || ContextCompat.checkSelfPermission(this,
+                    Manifest.permission.WRITE_EXTERNAL_STORAGE)
+                    != PackageManager.PERMISSION_GRANTED) {
+                if (!ActivityCompat.shouldShowRequestPermissionRationale(this,
+                        Manifest.permission.READ_EXTERNAL_STORAGE) || !ActivityCompat.shouldShowRequestPermissionRationale(this,
+                        Manifest.permission.WRITE_EXTERNAL_STORAGE)) {
+                    ActivityCompat.requestPermissions(this,
+                            new String[]{Manifest.permission.READ_EXTERNAL_STORAGE, Manifest.permission.WRITE_EXTERNAL_STORAGE},
+                            READ_WRITE_PERMISSION_CODE);
+                }
+            } else {
+                initializeAdapter();
+            }
+        } else {
+            initializeAdapter();
+        }
+    }
+
+    @Override
+    public void onRequestPermissionsResult(int requestCode,
+                                           String permissions[], int[] grantResults) {
+        switch (requestCode) {
+            case READ_WRITE_PERMISSION_CODE: {
+                if (grantResults.length == 2
+                        && grantResults[0] == PackageManager.PERMISSION_GRANTED
+                        && grantResults[1] == PackageManager.PERMISSION_GRANTED) {
+                    initializeAdapter();
+                }
+            }
+        }
+    }
+
+    private void initializeAdapter() {
+        adapter = new FileListAdapter(this);
+        File[] listFiles = Environment.getExternalStorageDirectory().listFiles();
+        for (File file : listFiles) {
+            adapter.addItem(file.getName(), file.isDirectory());
+        }
+        fileList.setAdapter(adapter);
+        adapter.notifyDataSetChanged();
+    }
+}

app/src/main/java/com/csc/malinovsky239/filemanager/OnItemClickListener.java

@@ -0,0 +1,10 @@
+package com.csc.malinovsky239.filemanager;
+
+/**
+ * Created by malinovsky239 on 28.03.2016.
+ */
+public interface OnItemClickListener {
+    void onItemClick(FileSystemItem item);
+
+    void onItemLongClick(FileSystemItem item);
+}

app/src/main/res/layout/item.xml

@@ -0,0 +1,42 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:android.support.v7.cardview="http://schemas.android.com/apk/res-auto"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:padding="16dp">
+
+    <android.support.v7.widget.CardView
+        android:id="@+id/item"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android.support.v7.cardview:cardBackgroundColor="#ffcccccc"
+        android.support.v7.cardview:cardCornerRadius="10dp">
+
+        <RelativeLayout
+            android:layout_width="match_parent"
+            android:layout_height="match_parent">
+
+            <ImageView
+                android:id="@+id/icon"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_alignParentLeft="true"
+                android:layout_alignParentStart="true"
+                android:layout_alignParentTop="true"
+                android:layout_marginEnd="16dp"
+                android:layout_marginRight="16dp" />
+
+            <TextView
+                android:id="@+id/filename"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_alignParentTop="true"
+                android:layout_toEndOf="@+id/icon"
+                android:layout_toRightOf="@+id/icon"
+                android:textSize="15sp" />
+
+        </RelativeLayout>
+
+    </android.support.v7.widget.CardView>
+
+</LinearLayout>

app/src/main/res/layout/main_activity.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical">
+
+    <android.support.v7.widget.RecyclerView
+        android:id="@+id/file_list"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent" />
+
+</LinearLayout>

app/src/main/res/values/strings.xml

@@ -1,3 +1,8 @@
 <resources>
-    <string name="app_name">lesson5</string>
+    <string name="app_name">File Manager</string>
+    <string name="rename_button">Rename</string>
+    <string name="delete_button">Delete</string>
+    <string name="root">/storage/emulated/0</string>
+    <string name="cancel_button">Cancel</string>
+    <string name="OK_button">OK</string>
 </resources>