Improve settings

app/src/main/AndroidManifest.xml

@@ -67,11 +67,16 @@
             android:configChanges="screenSize|uiMode"
             android:theme="@style/AppTheme"/>
 
+        <activity
+            android:name="com.hippo.ehviewer.ui.DirPickerActivity"
+            android:configChanges="screenSize|uiMode"
+            android:theme="@style/AppTheme.NoActionBar"
+            android:label="@string/dir_picker"/>
+
         <service
             android:name="com.hippo.ehviewer.download.DownloadService"
             android:icon="@mipmap/ic_launcher"
             android:label="@string/download"/>
 
     </application>
-
 </manifest>

app/src/main/java/com/hippo/ehviewer/Settings.java

@@ -259,7 +259,7 @@ public class Settings {
         return dir != null ? dir : UniFile.fromFile(AppConfig.getDefaultDownloadDir());
     }
 
-    public static void putImageSaveLocation(@NonNull UniFile location) {
+    public static void putDownloadLocation(@NonNull UniFile location) {
         Uri uri = location.getUri();
         putString(KEY_DOWNLOAD_SAVE_SCHEME, uri.getScheme());
         putString(KEY_DOWNLOAD_SAVE_AUTHORITY, uri.getEncodedAuthority());

app/src/main/java/com/hippo/ehviewer/ui/DirPickerActivity.java

@@ -0,0 +1,106 @@
+/*
+ * Copyright 2016 Hippo Seven
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.hippo.ehviewer.ui;
+
+import android.annotation.TargetApi;
+import android.content.Intent;
+import android.net.Uri;
+import android.os.Build;
+import android.os.Bundle;
+import android.support.annotation.NonNull;
+import android.view.MenuItem;
+import android.view.View;
+import android.widget.TextView;
+import android.widget.Toast;
+
+import com.hippo.ehviewer.R;
+import com.hippo.rippleold.RippleSalon;
+import com.hippo.widget.DirExplorer;
+
+import java.io.File;
+
+public class DirPickerActivity extends ToolbarActivity
+        implements View.OnClickListener, DirExplorer.OnChangeDirListener {
+
+    public static final String KEY_FILE_URI = "file_uri";
+
+    private TextView mPath;
+    private DirExplorer mDirExplorer;
+    private View mOk;
+
+    @TargetApi(Build.VERSION_CODES.JELLY_BEAN)
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        setContentView(R.layout.activity_dir_picker);
+        setNavigationIcon(R.drawable.v_arrow_left_dark_x24);
+
+        mPath = (TextView) findViewById(R.id.path);
+        mDirExplorer = (DirExplorer) findViewById(R.id.dir_explorer);
+        mOk = findViewById(R.id.ok);
+
+        File file = null;
+        Intent intent = getIntent();
+        if (intent != null) {
+            Uri fileUri = intent.getParcelableExtra(KEY_FILE_URI);
+            if (fileUri != null) {
+                file = new File(fileUri.getPath());
+            }
+        }
+
+        mDirExplorer.setCurrentFile(file);
+        mDirExplorer.setOnChangeDirListener(this);
+
+        RippleSalon.addRipple(mOk, false);
+
+        mOk.setOnClickListener(this);
+
+        mPath.setText(mDirExplorer.getCurrentFile().getPath());
+    }
+
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {
+        switch (item.getItemId()) {
+            case android.R.id.home:
+                finish();
+                return true;
+            default:
+                return super.onOptionsItemSelected(item);
+        }
+    }
+
+    @Override
+    public void onClick(@NonNull View v) {
+        if (mOk == v) {
+            File file = mDirExplorer.getCurrentFile();
+            if (!file.canWrite()) {
+                Toast.makeText(this, R.string.directory_not_writable, Toast.LENGTH_SHORT).show();
+            } else {
+                Intent intent = new Intent();
+                intent.setData(Uri.fromFile(file));
+                setResult(RESULT_OK, intent);
+                finish();
+            }
+        }
+    }
+
+    @Override
+    public void onChangeDir(File dir) {
+        mPath.setText(dir.getPath());
+    }
+}

app/src/main/java/com/hippo/ehviewer/ui/SettingsActivity.java

@@ -34,6 +34,8 @@ import android.widget.ListAdapter;
 
 import com.hippo.app.AppCompatPreferenceActivity;
 import com.hippo.ehviewer.R;
+import com.hippo.ehviewer.ui.fragment.AboutFragment;
+import com.hippo.ehviewer.ui.fragment.DownloadFragment;
 import com.hippo.ehviewer.ui.fragment.EhFragment;
 import com.hippo.ehviewer.ui.fragment.ReadFragment;
 import com.hippo.util.DrawableManager;
@@ -48,11 +50,13 @@ public final class SettingsActivity extends AppCompatPreferenceActivity {
     private static final String[] ENTRY_FRAGMENTS = {
             EhFragment.class.getName(),
             ReadFragment.class.getName(),
+            DownloadFragment.class.getName(),
+            AboutFragment.class.getName(),
     };
 
     private class FakeLayoutInflater extends LayoutInflater {
 
-        private LayoutInflater mInflater;
+        private final LayoutInflater mInflater;
 
         protected FakeLayoutInflater(LayoutInflater inflater) {
             super(null);
@@ -142,7 +146,6 @@ public final class SettingsActivity extends AppCompatPreferenceActivity {
         replaceHeaderLayoutResId();
     }
 
-
     @Override
     public boolean onOptionsItemSelected(MenuItem item) {
         switch (item.getItemId()) {

app/src/main/java/com/hippo/ehviewer/ui/ToolbarActivity.java

@@ -0,0 +1,66 @@
+/*
+ * Copyright 2016 Hippo Seven
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.hippo.ehviewer.ui;
+
+import android.graphics.drawable.Drawable;
+import android.support.annotation.DrawableRes;
+import android.support.annotation.LayoutRes;
+import android.support.annotation.Nullable;
+import android.support.v7.app.AppCompatActivity;
+import android.support.v7.widget.Toolbar;
+import android.view.View;
+import android.view.ViewGroup;
+
+import com.hippo.ehviewer.R;
+
+public class ToolbarActivity extends AppCompatActivity{
+
+    @Override
+    public void setContentView(@LayoutRes int layoutResID) {
+        super.setContentView(R.layout.activity_toolbar);
+        getLayoutInflater().inflate(layoutResID, (ViewGroup) findViewById(R.id.content_panel), true);
+        setSupportActionBar((Toolbar) findViewById(R.id.toolbar));
+    }
+
+    @Override
+    public void setContentView(View view) {
+        super.setContentView(R.layout.activity_toolbar);
+        ((ViewGroup) findViewById(R.id.content_panel)).addView(view);
+        setSupportActionBar((Toolbar) findViewById(R.id.toolbar));
+    }
+
+    @Override
+    public void setContentView(View view, ViewGroup.LayoutParams params) {
+        super.setContentView(R.layout.activity_toolbar);
+        ((ViewGroup) findViewById(R.id.content_panel)).addView(view, params);
+        setSupportActionBar((Toolbar) findViewById(R.id.toolbar));
+    }
+
+    public void setNavigationIcon(@DrawableRes int resId) {
+        View toolbar = findViewById(R.id.toolbar);
+        if (toolbar != null) {
+            ((Toolbar) toolbar).setNavigationIcon(resId);
+        }
+    }
+
+    public void setNavigationIcon(@Nullable Drawable icon) {
+        View toolbar = findViewById(R.id.toolbar);
+        if (toolbar != null) {
+            ((Toolbar) toolbar).setNavigationIcon(icon);
+        }
+    }
+}

app/src/main/java/com/hippo/ehviewer/ui/fragment/AboutFragment.java

@@ -0,0 +1,31 @@
+/*
+ * Copyright 2016 Hippo Seven
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.hippo.ehviewer.ui.fragment;
+
+import android.os.Bundle;
+import android.preference.PreferenceFragment;
+
+import com.hippo.ehviewer.R;
+
+public class AboutFragment extends PreferenceFragment {
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        addPreferencesFromResource(R.xml.about_settings);
+    }
+}

app/src/main/java/com/hippo/ehviewer/ui/fragment/DownloadFragment.java

@@ -0,0 +1,178 @@
+/*
+ * Copyright 2016 Hippo Seven
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.hippo.ehviewer.ui.fragment;
+
+import android.annotation.TargetApi;
+import android.app.Activity;
+import android.content.ActivityNotFoundException;
+import android.content.DialogInterface;
+import android.content.Intent;
+import android.net.Uri;
+import android.os.Build;
+import android.os.Bundle;
+import android.preference.Preference;
+import android.preference.PreferenceFragment;
+import android.support.annotation.Nullable;
+import android.support.v7.app.AlertDialog;
+import android.widget.Toast;
+
+import com.hippo.ehviewer.R;
+import com.hippo.ehviewer.Settings;
+import com.hippo.ehviewer.ui.DirPickerActivity;
+import com.hippo.unifile.UniFile;
+
+public class DownloadFragment extends PreferenceFragment implements Preference.OnPreferenceClickListener {
+
+    public static final int REQUEST_CODE_PICK_IMAGE_DIR = 0;
+    public static final int REQUEST_CODE_PICK_IMAGE_DIR_L = 1;
+
+    public static final String KEY_DOWNLOAD_LOCATION = "download_location";
+
+    private @Nullable Preference mDownloadLocation;
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        addPreferencesFromResource(R.xml.download_settings);
+
+        mDownloadLocation = findPreference(KEY_DOWNLOAD_LOCATION);
+
+        onUpdateDownloadLocation();
+
+        if (mDownloadLocation != null) {
+            mDownloadLocation.setOnPreferenceClickListener(this);
+        }
+    }
+
+    public void onUpdateDownloadLocation() {
+        UniFile file = Settings.getDownloadLocation();
+        if (mDownloadLocation != null) {
+            if (file != null) {
+                mDownloadLocation.setSummary(file.getUri().toString());
+            } else {
+                mDownloadLocation.setSummary(R.string.settings_download_invalid_download_location);
+            }
+        }
+    }
+
+    @Override
+    public boolean onPreferenceClick(Preference preference) {
+        String key = preference.getKey();
+        if (KEY_DOWNLOAD_LOCATION.equals(key)) {
+
+            int sdk = Build.VERSION.SDK_INT;
+            if (sdk < Build.VERSION_CODES.KITKAT) {
+                openDirPicker();
+            } else if (sdk < Build.VERSION_CODES.LOLLIPOP) {
+                showDirPickerDialogKK();
+            } else {
+                showDirPickerDialogL();
+            }
+            return true;
+        }
+        return false;
+    }
+
+    private void showDirPickerDialogKK() {
+        new AlertDialog.Builder(getActivity()).setMessage(R.string.settings_download_pick_dir_kk)
+                .setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
+                    @Override
+                    public void onClick(DialogInterface dialog, int which) {
+                        openDirPicker();
+                    }
+                }).show();
+    }
+
+    private void showDirPickerDialogL() {
+        DialogInterface.OnClickListener listener = new DialogInterface.OnClickListener() {
+            @Override
+            public void onClick(DialogInterface dialog, int which) {
+                switch (which) {
+                    case DialogInterface.BUTTON_POSITIVE:
+                        openDirPicker();
+                        break;
+                    case DialogInterface.BUTTON_NEUTRAL:
+                        openDirPickerL();
+                        break;
+                }
+            }
+        };
+
+        new AlertDialog.Builder(getActivity()).setMessage(R.string.settings_download_pick_dir_l)
+                .setPositiveButton(android.R.string.ok, listener)
+                .setNeutralButton(R.string.settings_download_document, listener)
+                .show();
+    }
+
+    private void openDirPicker() {
+        UniFile uniFile = Settings.getDownloadLocation();
+        Intent intent = new Intent(getActivity(), DirPickerActivity.class);
+        if (uniFile != null) {
+            intent.putExtra(DirPickerActivity.KEY_FILE_URI, uniFile.getUri());
+        }
+        startActivityForResult(intent, REQUEST_CODE_PICK_IMAGE_DIR);
+    }
+
+    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
+    private void openDirPickerL() {
+        Intent intent = new Intent(Intent.ACTION_OPEN_DOCUMENT_TREE);
+        try {
+            startActivityForResult(intent, REQUEST_CODE_PICK_IMAGE_DIR_L);
+        } catch (ActivityNotFoundException e) {
+            Toast.makeText(getActivity(), R.string.error_cant_find_activity, Toast.LENGTH_SHORT).show();
+        }
+    }
+
+    @Override
+    @TargetApi(Build.VERSION_CODES.KITKAT)
+    public void onActivityResult(int requestCode, int resultCode, Intent data) {
+        switch (requestCode) {
+            case REQUEST_CODE_PICK_IMAGE_DIR: {
+                if (resultCode == Activity.RESULT_OK) {
+                    UniFile uniFile = UniFile.fromUri(getActivity(), data.getData());
+                    if (uniFile != null) {
+                        Settings.putDownloadLocation(uniFile);
+                        onUpdateDownloadLocation();
+                    } else {
+                        Toast.makeText(getActivity(), R.string.settings_download_cant_get_download_location,
+                                Toast.LENGTH_SHORT).show();
+                    }
+                }
+                break;
+            }
+            case REQUEST_CODE_PICK_IMAGE_DIR_L: {
+                if (resultCode == Activity.RESULT_OK) {
+                    Uri treeUri = data.getData();
+                    getActivity().getContentResolver().takePersistableUriPermission(
+                            treeUri, Intent.FLAG_GRANT_READ_URI_PERMISSION | Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
+                    UniFile uniFile = UniFile.fromTreeUri(getActivity(), treeUri);
+                    if (uniFile != null) {
+                        Settings.putDownloadLocation(uniFile);
+                        onUpdateDownloadLocation();
+                    } else {
+                        Toast.makeText(getActivity(), R.string.settings_download_cant_get_download_location,
+                                Toast.LENGTH_SHORT).show();
+                    }
+                }
+                break;
+            }
+            default: {
+                super.onActivityResult(requestCode, resultCode, data);
+            }
+        }
+    }
+}

app/src/main/java/com/hippo/widget/DirExplorer.java

@@ -0,0 +1,189 @@
+/*
+ * Copyright 2015 Hippo Seven
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.hippo.widget;
+
+import android.content.Context;
+import android.os.Environment;
+import android.support.v7.widget.LinearLayoutManager;
+import android.util.AttributeSet;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.TextView;
+
+import com.hippo.easyrecyclerview.EasyRecyclerView;
+import com.hippo.easyrecyclerview.LinearDividerItemDecoration;
+import com.hippo.ehviewer.R;
+import com.hippo.rippleold.RippleSalon;
+import com.hippo.yorozuya.LayoutUtils;
+import com.hippo.yorozuya.ResourcesUtils;
+
+import java.io.File;
+import java.io.FileFilter;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.Comparator;
+import java.util.List;
+
+public class DirExplorer extends EasyRecyclerView implements EasyRecyclerView.OnItemClickListener {
+
+    private static final DirFilter DIR_FILTER = new DirFilter();
+    private static final FileSort FILE_SORT = new FileSort();
+
+    private static final File PARENT_DIR = null;
+    private static final String PARENT_DIR_NAME = "..";
+
+    private File mCurrentFile;
+    private final List<File> mFiles = new ArrayList<>();
+
+    private DirAdapter mAdapter;
+
+    private OnChangeDirListener mOnChangeDirListener;
+
+    public DirExplorer(Context context) {
+        super(context);
+        init(context);
+    }
+
+    public DirExplorer(Context context, AttributeSet attrs) {
+        super(context, attrs);
+        init(context);
+    }
+
+    public DirExplorer(Context context, AttributeSet attrs, int defStyle) {
+        super(context, attrs, defStyle);
+        init(context);
+    }
+
+    private void init(Context context) {
+        mAdapter = new DirAdapter();
+        setAdapter(mAdapter);
+        setLayoutManager(new LinearLayoutManager(context));
+        LinearDividerItemDecoration decoration = new LinearDividerItemDecoration(
+                LinearDividerItemDecoration.VERTICAL, getResources().getColor(R.color.divider),
+                LayoutUtils.dp2pix(context, 1));
+        decoration.setShowLastDivider(true);
+        addItemDecoration(decoration);
+        setSelector(RippleSalon.generateRippleDrawable(ResourcesUtils.getAttrBoolean(context, R.attr.dark)));
+        setOnItemClickListener(this);
+
+        mCurrentFile = Environment.getExternalStorageDirectory();
+        if (!Environment.MEDIA_MOUNTED.equals(Environment.getExternalStorageState())
+                || mCurrentFile == null) {
+            mCurrentFile = new File("/");
+        }
+        updateFileList();
+    }
+
+    public void setOnChangeDirListener(OnChangeDirListener listener) {
+        mOnChangeDirListener = listener;
+    }
+
+    public void updateFileList() {
+        File[] files = mCurrentFile.listFiles(DIR_FILTER);
+
+        mFiles.clear();
+        if (mCurrentFile.getParent() != null) {
+            mFiles.add(PARENT_DIR);
+        }
+        if (files != null) {
+            Collections.addAll(mFiles, files);
+        }
+        // sort
+        Collections.sort(mFiles, FILE_SORT);
+    }
+
+    public File getCurrentFile() {
+        return mCurrentFile;
+    }
+
+    public void setCurrentFile(File file) {
+        if (file != null && file.isDirectory()) {
+            mCurrentFile = file;
+            updateFileList();
+            mAdapter.notifyDataSetChanged();
+
+            if (mOnChangeDirListener != null) {
+                mOnChangeDirListener.onChangeDir(mCurrentFile);
+            }
+        }
+    }
+
+    @Override
+    public boolean onItemClick(EasyRecyclerView parent, View view, int position, long id) {
+        File file = mFiles.get(position);
+        if (file == PARENT_DIR) {
+            file = mCurrentFile.getParentFile();
+        }
+        setCurrentFile(file);
+        return true;
+    }
+
+    private class DirHolder extends ViewHolder {
+
+        public TextView textView;
+
+        public DirHolder(View itemView) {
+            super(itemView);
+            textView = (TextView) itemView;
+        }
+    }
+
+    private class DirAdapter extends Adapter<DirHolder> {
+
+        @Override
+        public DirHolder onCreateViewHolder(ViewGroup parent, int viewType) {
+            return new DirHolder( LayoutInflater.from(getContext()).inflate(R.layout.item_dir_explorer, parent, false));
+        }
+
+        @Override
+        public void onBindViewHolder(DirHolder holder, int position) {
+            File file = mFiles.get(position);
+            holder.textView.setText(file == PARENT_DIR ? PARENT_DIR_NAME : file.getName());
+        }
+
+        @Override
+        public int getItemCount() {
+            return mFiles.size();
+        }
+    }
+
+    static class DirFilter implements FileFilter {
+        @Override
+        public boolean accept(File pathname) {
+            return pathname.isDirectory();
+        }
+    }
+
+    static class FileSort implements Comparator<File> {
+        @Override
+        public int compare(File lhs, File rhs) {
+            if (lhs == null) {
+                return Integer.MIN_VALUE;
+            } else if (rhs == null) {
+                return Integer.MAX_VALUE;
+            } else {
+                return lhs.getName().compareToIgnoreCase(rhs.getName());
+            }
+        }
+    }
+
+    public interface OnChangeDirListener {
+
+        void onChangeDir(File dir);
+    }
+}

app/src/main/res/drawable/v_download_primary_x24.xml

@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright 2016 Hippo Seven
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~     http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+
+<vector
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:height="24dp"
+    android:width="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+
+    <path
+        android:fillColor="?attr/colorPrimary"
+        android:pathData="@string/pd_download"/>
+
+</vector>

app/src/main/res/drawable/v_info_primary_x24.xml

@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright 2016 Hippo Seven
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~     http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+
+<vector
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:height="24dp"
+    android:width="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+
+    <path
+        android:fillColor="?attr/colorPrimary"
+        android:pathData="@string/pd_info"/>
+
+</vector>

app/src/main/res/layout-v21/scene_toolbar.xml

@@ -0,0 +1,38 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright 2016 Hippo Seven
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~     http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+
+<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.Toolbar
+        android:id="@+id/toolbar"
+        android:layout_height="?attr/actionBarSize"
+        android:layout_width="match_parent"
+        android:background="?attr/colorPrimary"
+        android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
+        android:elevation="8dp"/>
+
+    <FrameLayout
+        android:id="@+id/content_panel"
+        android:layout_width="match_parent"
+        android:layout_height="0dp"
+        android:layout_weight="1"/>
+
+</LinearLayout>

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

@@ -0,0 +1,51 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright 2016 Hippo Seven
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~     http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+
+<LinearLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:padding="@dimen/keyline_margin"
+    android:orientation="vertical">
+
+    <TextView
+        android:id="@+id/path"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginBottom="8dp"
+        android:singleLine="true"
+        android:ellipsize="start"
+        android:textColor="?android:attr/textColorPrimary"
+        android:textSize="@dimen/text_little_small"/>
+
+    <com.hippo.widget.DirExplorer
+        android:id="@+id/dir_explorer"
+        android:layout_width="match_parent"
+        android:layout_height="0dp"
+        android:layout_weight="1"/>
+
+    <TextView
+        android:id="@+id/ok"
+        style="@style/CardButton"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="right"
+        android:text="@android:string/ok"
+        android:textColor="?attr/colorPrimary"
+        android:background="@null"/>
+
+</LinearLayout>

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

@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright 2016 Hippo Seven
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~     http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+
+<merge>
+    <include layout="@layout/scene_toolbar"/>
+</merge>

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

@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright 2016 Hippo Seven
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~     http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+
+<TextView
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/text"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:gravity="center_vertical"
+    android:padding="8dp"/>

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

@@ -36,7 +36,7 @@
 
         <View
             android:layout_width="match_parent"
-            android:layout_height="4dp"
+            android:layout_height="8dp"
             android:background="@drawable/shadow_bottom"/>
 
     </FrameLayout>

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

@@ -288,6 +288,20 @@
     <string name="settings_read_show_battery_title">Show battery</string>
     <string name="settings_read_volume_page_title">Use volume key to turn pages</string>
 
+    <string name="settings_download_title">Download</string>
+    <string name="settings_download_download_location_title">Download location</string>
+    <string name="settings_download_invalid_download_location">Invalid download location</string>
+    <string name="settings_download_cant_get_download_location">Can\'t get download location</string>
+    <string name="settings_download_pick_dir_kk">You can\'t write any kind of data on your external SD card in Android 4.4+ unless you have hacked it</string>
+    <string name="settings_download_pick_dir_l">Android 5.0+ provides new API to write on external SD card. Click the \"DOCUMENT\" button if you want to set download location to SD card</string>
+    <string name="settings_download_document">Document</string>
+
+    <string name="settings_about_title">About</string>
+
+    <!-- Dir Picker-->
+    <string name="dir_picker">Dir picker</string>
+    <string name="directory_not_writable">The directory is not writable</string>
+
     <!-- Progress Scene -->
     <string name="error_something_wrong_happened">Something wrong happened</string>
 

app/src/main/res/xml/about_settings.xml

@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright 2016 Hippo Seven
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~     http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+
+<PreferenceScreen
+    xmlns:android="http://schemas.android.com/apk/res/android">
+
+
+
+
+
+
+</PreferenceScreen>

app/src/main/res/xml/download_settings.xml

@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright 2016 Hippo Seven
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~     http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+
+<PreferenceScreen
+    xmlns:android="http://schemas.android.com/apk/res/android">
+
+    <Preference
+        android:key="download_location"
+        android:title="@string/settings_download_download_location_title"/>
+
+</PreferenceScreen>

app/src/main/res/xml/settings_headers.xml

@@ -28,4 +28,14 @@
         android:title="@string/settings_read_title"
         android:icon="@drawable/v_book_open_primary_x24"/>
 
+    <header
+        android:fragment="com.hippo.ehviewer.ui.fragment.DownloadFragment"
+        android:title="@string/settings_download_title"
+        android:icon="@drawable/v_download_primary_x24"/>
+
+    <header
+        android:fragment="com.hippo.ehviewer.ui.fragment.AboutFragment"
+        android:title="@string/settings_about_title"
+        android:icon="@drawable/v_info_primary_x24"/>
+
 </preference-headers>