Extract data folder dialog layout

This is in preparation to add a progress bar displaying the amount of
used/free space in the dialog (#3049). Since we'll need a custom view to
do it, this extracts the layout beforehand.

app/src/main/java/de/danoeh/antennapod/adapter/DataFolderAdapter.java

@@ -0,0 +1,131 @@
+package de.danoeh.antennapod.adapter;
+
+import android.app.Dialog;
+import android.content.Context;
+import android.support.annotation.NonNull;
+import android.support.v4.content.ContextCompat;
+import android.support.v7.widget.RecyclerView;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.RadioButton;
+import android.widget.TextView;
+
+import java.io.File;
+import java.util.ArrayList;
+import java.util.List;
+
+import de.danoeh.antennapod.R;
+import de.danoeh.antennapod.core.preferences.UserPreferences;
+import de.danoeh.antennapod.core.util.Converter;
+import de.danoeh.antennapod.core.util.StorageUtils;
+import de.danoeh.antennapod.dialog.ChooseDataFolderDialog;
+
+
+public class DataFolderAdapter extends RecyclerView.Adapter<DataFolderAdapter.ViewHolder> {
+    private final ChooseDataFolderDialog.RunnableWithString selectionHandler;
+    private final String currentPath;
+    private final List<StoragePath> entries;
+    private Dialog dialog;
+
+    public DataFolderAdapter(Context context, ChooseDataFolderDialog.RunnableWithString selectionHandler) {
+        this.entries = getStorageEntries(context);
+        this.currentPath = getCurrentPath();
+        this.selectionHandler = selectionHandler;
+    }
+
+    @NonNull
+    @Override
+    public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
+        LayoutInflater inflater = LayoutInflater.from(parent.getContext());
+        View entryView = inflater.inflate(R.layout.choose_data_folder_dialog_entry, parent, false);
+        return new ViewHolder(entryView);
+    }
+
+    @Override
+    public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
+        StoragePath storagePath = entries.get(position);
+        holder.path.setText(storagePath.getShortPath());
+        holder.size.setText(Converter.byteToString(storagePath.getAvailableSpace()));
+        holder.root.setOnClickListener((View v) -> selectAndDismiss(storagePath));
+        holder.radioButton.setOnClickListener((View v) -> selectAndDismiss(storagePath));
+        if (storagePath.getFullPath().equals(currentPath)) {
+            holder.radioButton.toggle();
+        }
+    }
+
+    @Override
+    public int getItemCount() {
+        if (currentPath == null) {
+            return 0;
+        } else {
+            return entries.size();
+        }
+    }
+
+    public void setDialog(Dialog dialog) {
+        this.dialog = dialog;
+    }
+
+    private String getCurrentPath() {
+        File dataFolder = UserPreferences.getDataFolder(null);
+        if (dataFolder != null) return dataFolder.getAbsolutePath();
+        return null;
+    }
+
+    private List<StoragePath> getStorageEntries(Context context) {
+        File[] mediaDirs = ContextCompat.getExternalFilesDirs(context, null);
+        final List<StoragePath> entries = new ArrayList<>(mediaDirs.length);
+        for (File dir : mediaDirs) {
+            if (isNotWritable(dir)) continue;
+
+            entries.add(new StoragePath(dir.getAbsolutePath()));
+        }
+        return entries;
+    }
+
+    private boolean isNotWritable(File dir) {
+        return dir == null || !dir.exists() || !dir.canRead() || !dir.canWrite();
+    }
+
+    private void selectAndDismiss(StoragePath storagePath) {
+        selectionHandler.run(storagePath.getFullPath());
+        dialog.dismiss();
+    }
+
+    class ViewHolder extends RecyclerView.ViewHolder {
+        private View root;
+        private TextView path;
+        private TextView size;
+        private RadioButton radioButton;
+
+        ViewHolder(View itemView) {
+            super(itemView);
+            root = itemView.findViewById(R.id.root);
+            path = itemView.findViewById(R.id.path);
+            size = itemView.findViewById(R.id.size);
+            radioButton = itemView.findViewById(R.id.radio_button);
+        }
+    }
+
+    class StoragePath {
+        private final String path;
+
+        StoragePath(String path) {
+            this.path = path;
+        }
+
+        String getShortPath() {
+            int prefixIndex = path.indexOf("Android");
+            return (prefixIndex > 0) ? path.substring(0, prefixIndex) : path;
+        }
+
+        String getFullPath() {
+            return this.path;
+        }
+
+        long getAvailableSpace() {
+            return StorageUtils.getFreeSpaceAvailable(path);
+        }
+    }
+}

app/src/main/java/de/danoeh/antennapod/dialog/ChooseDataFolderDialog.java

@@ -1,21 +1,11 @@
 package de.danoeh.antennapod.dialog;
 
 import android.content.Context;
-import android.os.Build;
-import android.support.v4.content.ContextCompat;
-import android.text.Html;
 
 import com.afollestad.materialdialogs.MaterialDialog;
 
-import java.io.File;
-import java.util.ArrayList;
-import java.util.HashMap;
-import java.util.List;
-
 import de.danoeh.antennapod.R;
-import de.danoeh.antennapod.core.preferences.UserPreferences;
+import de.danoeh.antennapod.adapter.DataFolderAdapter;
-import de.danoeh.antennapod.core.util.Converter;
-import de.danoeh.antennapod.core.util.StorageUtils;
 
 public class ChooseDataFolderDialog {
 
@@ -32,12 +22,9 @@ public class ChooseDataFolderDialog {
     private ChooseDataFolderDialog() {}
 
     public static void showDialog(final Context context, RunnableWithString handlerFunc) {
-        File dataFolder = UserPreferences.getDataFolder(null);
+        DataFolderAdapter adapter = new DataFolderAdapter(context, handlerFunc);
-        HashMap<String, List<String>> options = getStorageOptions(context);
-        final List<String> entries = options.get("entries");
-        final List<String> folders = options.get("folders");
 
-        if (dataFolder == null || entries.isEmpty()) {
+        if (adapter.getItemCount() == 0) {
             new MaterialDialog.Builder(context)
                     .title(R.string.error_label)
                     .content(R.string.external_storage_error_msg)
@@ -46,66 +33,15 @@ public class ChooseDataFolderDialog {
             return;
         }
 
-        int selectedIndex = folders.indexOf(dataFolder.getAbsolutePath());
         MaterialDialog dialog = new MaterialDialog.Builder(context)
                 .title(R.string.choose_data_directory)
                 .content(R.string.choose_data_directory_message)
-                .items(entries)
+                .adapter(adapter, null)
-                .itemsCallbackSingleChoice(selectedIndex, (dialog1, itemView, which, text) -> {
-                    String folder = folders.get(which);
-                    handlerFunc.run(folder);
-                    return true;
-                })
                 .negativeText(R.string.cancel_label)
                 .cancelable(true)
                 .build();
+        adapter.setDialog(dialog);
         dialog.show();
     }
 
-    private static HashMap<String, List<String>> getStorageOptions(Context context) {
-        File[] mediaDirs = ContextCompat.getExternalFilesDirs(context, null);
-        final List<String> folders = new ArrayList<>(mediaDirs.length);
-        final List<String> entries = new ArrayList<>(mediaDirs.length);
-        for (File dir : mediaDirs) {
-            if (isNotWritable(dir)) continue;
-
-            String path = dir.getAbsolutePath();
-            String location = getStorageLocation(path);
-            String availableSpace = getAvailableSpace(path);
-            folders.add(path);
-            entries.add(storageEntry(location, availableSpace));
-        }
-        return new HashMap<String, List<String>>() {{
-            put("folders", folders);
-            put("entries", entries);
-        }};
-    }
-
-    private static String storageEntry(String location, String availableSpace) {
-        String html = String.format("<small>%1$s [%2$s]</small>", location, availableSpace);
-        return fromHtmlVersioned(html).toString();
-    }
-
-    private static String getAvailableSpace(String path) {
-        long spaceAvailable = StorageUtils.getFreeSpaceAvailable(path);
-        return Converter.byteToString(spaceAvailable);
-    }
-
-    private static String getStorageLocation(String path) {
-        int prefixIndex = path.indexOf("Android");
-        return (prefixIndex > 0) ? path.substring(0, prefixIndex) : path;
-    }
-
-    private static boolean isNotWritable(File dir) {
-        return dir == null || !dir.exists() || !dir.canRead() || !dir.canWrite();
-    }
-
-    @SuppressWarnings("deprecation")
-    private static CharSequence fromHtmlVersioned(final String html) {
-        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.N) {
-            return Html.fromHtml(html);
-        }
-        return Html.fromHtml(html, Html.FROM_HTML_MODE_LEGACY);
-    }
-
 }

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

@@ -0,0 +1,40 @@
+<?xml version="1.0" encoding="utf-8"?>
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/root"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:layout_margin="@dimen/diag_content_side_padding"
+    android:background="?attr/selectableItemBackground">
+
+    <RadioButton
+        android:id="@+id/radio_button"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_alignParentStart="true"
+        android:layout_alignParentLeft="true"
+        android:layout_centerVertical="true"
+        android:padding="4dp" />
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_centerInParent="true"
+        android:layout_toEndOf="@+id/radio_button"
+        android:layout_toRightOf="@+id/radio_button"
+        android:orientation="vertical">
+
+        <TextView
+            android:id="@+id/path"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            tools:text="/storage/sdcard0" />
+
+        <TextView
+            android:id="@+id/size"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            tools:text="2 GB" />
+    </LinearLayout>
+
+</RelativeLayout>