Added tutorial. WIP

app/build.gradle

@@ -132,5 +132,6 @@ dependencies {
     compile 'org.solovyev.android.views:linear-layout-manager:0.5@aar'
     //noinspection GradleDynamicVersion
     compile 'com.anjlab.android.iab.v3:library:1.0.+'
-    compile('de.psdev.licensesdialog:licensesdialog:1.8.0')
+    compile 'de.psdev.licensesdialog:licensesdialog:1.8.0'
+    compile 'com.github.kabouzeid:AppIntro:3.3.0k'
 }

app/src/main/AndroidManifest.xml

@@ -139,6 +139,10 @@
         <activity
             android:name=".ui.activities.AboutActivity"
             android:label="@string/action_about" />
+
+        <activity
+            android:name=".ui.activities.IntroActivity"
+            android:label="@string/intro_activity" />
     </application>
 
 </manifest>

app/src/main/java/com/kabouzeid/gramophone/ui/activities/IntroActivity.java

@@ -0,0 +1,37 @@
+package com.kabouzeid.gramophone.ui.activities;
+
+import android.Manifest;
+import android.content.pm.PackageManager;
+import android.os.Build;
+import android.os.Bundle;
+import android.support.v4.content.ContextCompat;
+
+import com.github.paolorotolo.appintro.AppIntro;
+import com.github.paolorotolo.appintro.AppIntroFragment;
+import com.kabouzeid.gramophone.R;
+import com.kabouzeid.gramophone.util.ColorUtil;
+
+/**
+ * @author Karim Abou Zeid (kabouzeid)
+ */
+public class IntroActivity extends AppIntro {
+    @Override
+    public void init(Bundle savedInstanceState) {
+        int color = ContextCompat.getColor(this, R.color.blue_grey_700);
+        setStatusBarColor(ColorUtil.shiftColorDown(color));
+
+        addSlide(AppIntroFragment.newInstance(getString(R.string.app_name), "Welcome to Phonograph, a beautiful and lightweight music player for Android. ", R.drawable.icon_web, color));
+        if (!hasExternalStoragePermission()) {
+            addSlide(AppIntroFragment.newInstance("Storage", "The storage permission is required for Phonograph to read your music library.", R.drawable.ic_folder_web, color));
+            askForPermissions(new String[]{Manifest.permission.READ_EXTERNAL_STORAGE, Manifest.permission.WRITE_EXTERNAL_STORAGE}, 1);
+        }
+        addSlide(AppIntroFragment.newInstance(getString(R.string.label_current_playing_queue), "You can swipe the card in the now playing screen up to reveal to full playing queue.", R.drawable.intro_swipe_up, color));
+    }
+
+    private boolean hasExternalStoragePermission() {
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
+            return checkSelfPermission(Manifest.permission.READ_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED && checkSelfPermission(Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED;
+        }
+        return true;
+    }
+}

app/src/main/java/com/kabouzeid/gramophone/ui/activities/MainActivity.java

@@ -114,6 +114,17 @@ public class MainActivity extends AbsSlidingMusicPanelActivity
         setStatusBarThemeColor();
 
         checkChangelog();
+
+        PreferenceUtil.getInstance(this).incrementAppOpenCount();
+
+        new Thread(new Runnable() {
+            @Override
+            public void run() {
+                if (PreferenceUtil.getInstance(MainActivity.this).getAppOpenCount() == 1) {
+                    startActivity(new Intent(MainActivity.this, IntroActivity.class));
+                }
+            }
+        }).start();
     }
 
     @Override

app/src/main/java/com/kabouzeid/gramophone/ui/activities/base/AbsBaseActivity.java

@@ -8,9 +8,11 @@ import android.os.Build;
 import android.os.Bundle;
 import android.os.Handler;
 import android.support.annotation.NonNull;
+import android.support.design.widget.Snackbar;
 import android.view.KeyEvent;
-import android.widget.Toast;
+import android.view.View;
 
+import com.afollestad.materialdialogs.internal.ThemeSingleton;
 import com.kabouzeid.gramophone.R;
 import com.kabouzeid.gramophone.interfaces.KabViewsDisableAble;
 
@@ -28,7 +30,7 @@ public abstract class AbsBaseActivity extends AbsThemeActivity implements KabVie
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setVolumeControlStream(AudioManager.STREAM_MUSIC);
-        checkExternalStoragePermissions();
+        hasExternalStoragePermission = hasExternalStoragePermission();
     }
 
     @Override
@@ -36,13 +38,17 @@ public abstract class AbsBaseActivity extends AbsThemeActivity implements KabVie
         super.onResume();
         enableViews();
 
-        // the handler is necessary to avoid "java.lang.RuntimeException: Performing pause of activity that is not resumed"
-        new Handler().postDelayed(new Runnable() {
-            @Override
-            public void run() {
-                recreateIfPermissionsChanged();
-            }
-        }, 200);
+        if (!hasExternalStoragePermission()) {
+            requestPermissions();
+        } else if (didPermissionsChanged()) {
+            // the handler is necessary to avoid "java.lang.RuntimeException: Performing pause of activity that is not resumed"
+            new Handler().postDelayed(new Runnable() {
+                @Override
+                public void run() {
+                    recreate();
+                }
+            }, 200);
+        }
     }
 
     @Override
@@ -83,22 +89,13 @@ public abstract class AbsBaseActivity extends AbsThemeActivity implements KabVie
         return areViewsEnabled;
     }
 
-    protected void recreateIfPermissionsChanged() {
-        if (didPermissionsChanged()) {
-            recreate();
-        }
-    }
-
     private boolean didPermissionsChanged() {
         return hasExternalStoragePermission != hasExternalStoragePermission();
     }
 
-    private void checkExternalStoragePermissions() {
-        hasExternalStoragePermission = hasExternalStoragePermission();
-        if (!hasExternalStoragePermission) {
-            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
-                requestPermissions(new String[]{Manifest.permission.READ_EXTERNAL_STORAGE, Manifest.permission.WRITE_EXTERNAL_STORAGE}, REQUEST_EXTERNAL_STORAGE_PERMISSION);
-            }
+    private void requestPermissions() {
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
+            requestPermissions(new String[]{Manifest.permission.READ_EXTERNAL_STORAGE, Manifest.permission.WRITE_EXTERNAL_STORAGE}, REQUEST_EXTERNAL_STORAGE_PERMISSION);
         }
     }
 
@@ -117,7 +114,17 @@ public abstract class AbsBaseActivity extends AbsThemeActivity implements KabVie
                     return;
                 }
             }
-            Toast.makeText(this, getResources().getString(R.string.permission_to_access_external_storage_denied), Toast.LENGTH_SHORT).show();
+            Snackbar.make(getWindow().getDecorView(), R.string.permission_to_access_external_storage_denied, Snackbar.LENGTH_INDEFINITE)
+                    .setAction(getString(R.string.action_settings), onGoToPermissionSettingsClickListener)
+                    .setActionTextColor(ThemeSingleton.get().positiveColor)
+                    .show();
         }
     }
+
+    private View.OnClickListener onGoToPermissionSettingsClickListener = new View.OnClickListener() {
+        @Override
+        public void onClick(View v) {
+            //TODO
+        }
+    };
 }

app/src/main/java/com/kabouzeid/gramophone/util/PreferenceUtil.java

@@ -62,6 +62,8 @@ public final class PreferenceUtil {
 
     public static final String LAST_CHANGELOG_VERSION = "last_changelog_version";
 
+    public static final String APP_OPEN_COUNT = "app_open_count";
+
     private static PreferenceUtil sInstance;
 
     private final SharedPreferences mPreferences;
@@ -361,4 +363,12 @@ public final class PreferenceUtil {
     public final int getLastChangelogVersion() {
         return mPreferences.getInt(LAST_CHANGELOG_VERSION, -1);
     }
+
+    public void incrementAppOpenCount() {
+        mPreferences.edit().putInt(APP_OPEN_COUNT, getAppOpenCount() + 1).apply();
+    }
+
+    public final int getAppOpenCount() {
+        return mPreferences.getInt(APP_OPEN_COUNT, 0);
+    }
 }

app/src/main/res/raw/notices.xml

@@ -88,6 +88,12 @@
         <copyright>Copyright 2014 AnjLab</copyright>
         <license>Apache Software License 2.0</license>
     </notice>
+    <notice>
+        <name>AppIntro</name>
+        <url>https://github.com/PaoloRotolo/AppIntro</url>
+        <copyright>Copyright {2015} {Paolo Rotolo}</copyright>
+        <license>Apache Software License 2.0</license>
+    </notice>
     <notice>
         <name>Material Dialogs</name>
         <url>https://github.com/afollestad/material-dialogs</url>

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

@@ -8,6 +8,8 @@
     <color name="grey_800">#424242</color>
     <color name="grey_300">#E0E0E0</color>
 
+    <color name="blue_grey_700">#455A64</color>
+
     <color name="white">#FFFFFF</color>
 
 </resources>

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

@@ -9,6 +9,7 @@
     <string name="action_share">Share</string>
     <string name="action_settings">"Settings"</string>
     <string name="action_about">About</string>
+    <string name="action_show_intro">Show intro</string>
     <string name="action_clear_playlist">Clear playlist</string>
     <string name="action_playing_queue">Playing queue</string>
     <string name="action_add_to_favorites">Add to favorites</string>
@@ -212,4 +213,5 @@
     <string name="loading_products">Loading products…</string>
     <string name="up_next">Up next</string>
     <string name="pref_title_now_playing_layout">Now playing layout</string>
+    <string name="intro_activity">Intro</string>
 </resources>