Backwards compatible to SDK 17

app/build.gradle

@@ -9,6 +9,7 @@ android {
     buildToolsVersion rootProject.ext.buildToolsVersion
 
     defaultConfig {
+        minSdkVersion 17
         applicationId "com.topjohnwu.magisk"
         targetSdkVersion rootProject.ext.compileSdkVersion
         vectorDrawables.useSupportLibrary = true
@@ -41,7 +42,6 @@ android {
 
     productFlavors {
         full {
-            minSdkVersion 21
             versionName configProps['appVersion']
             versionCode configProps['appVersionCode'] as Integer
             javaCompileOptions {
@@ -51,7 +51,6 @@ android {
             }
         }
         stub {
-            minSdkVersion 17
             versionCode 1
             versionName "stub"
         }

app/src/full/AndroidManifest.xml

@@ -32,15 +32,15 @@
         </activity>
         <activity
             android:name="a.d"
-            android:theme="@style/AppTheme.StatusBar" />
+            android:theme="@style/AppTheme.NoDrawer" />
         <activity
             android:name="a.e"
-            android:theme="@style/AppTheme.StatusBar"/>
+            android:theme="@style/AppTheme.NoDrawer"/>
         <activity
             android:name="a.f"
             android:configChanges="keyboardHidden|orientation|screenSize"
             android:screenOrientation="nosensor"
-            android:theme="@style/AppTheme.StatusBar" />
+            android:theme="@style/AppTheme.NoDrawer" />
 
         <!-- Superuser -->
 

app/src/full/java/a/w.java

@@ -22,7 +22,7 @@ public class w<T extends DelegateWorker> extends Worker {
         try {
             base = ((Class<T>) ((ParameterizedType) getClass().getGenericSuperclass())
                     .getActualTypeArguments()[0]).newInstance();
-        } catch (IllegalAccessException | InstantiationException ignored) {}
+        } catch (Exception ignored) {}
     }
 
     @NonNull

app/src/full/java/com/topjohnwu/magisk/AboutActivity.java

@@ -30,7 +30,7 @@ public class AboutActivity extends BaseActivity {
 
     @Override
     public int getDarkTheme() {
-        return R.style.AppTheme_StatusBar_Dark;
+        return R.style.AppTheme_NoDrawer_Dark;
     }
 
     @Override

app/src/full/java/com/topjohnwu/magisk/DonationActivity.java

@@ -21,7 +21,7 @@ public class DonationActivity extends BaseActivity {
 
     @Override
     public int getDarkTheme() {
-        return R.style.AppTheme_StatusBar_Dark;
+        return R.style.AppTheme_NoDrawer_Dark;
     }
 
     @Override

app/src/full/java/com/topjohnwu/magisk/FlashActivity.java

@@ -85,7 +85,7 @@ public class FlashActivity extends BaseActivity {
 
     @Override
     public int getDarkTheme() {
-        return R.style.AppTheme_StatusBar_Dark;
+        return R.style.AppTheme_NoDrawer_Dark;
     }
 
     @Override

app/src/full/java/com/topjohnwu/magisk/MainActivity.java

@@ -1,6 +1,7 @@
 package com.topjohnwu.magisk;
 
 import android.content.Intent;
+import android.os.Build;
 import android.os.Bundle;
 import android.os.Handler;
 import android.view.Menu;
@@ -75,7 +76,9 @@ public class MainActivity extends BaseActivity
             }
         };
 
-        toolbarElevation = toolbar.getElevation();
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
+            toolbarElevation = toolbar.getElevation();
+        }
 
         drawer.addDrawerListener(toggle);
         toggle.syncState();
@@ -208,6 +211,8 @@ public class MainActivity extends BaseActivity
                 .setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN)
                 .replace(R.id.content_frame, navFragment)
                 .commitNow();
-        toolbar.setElevation(setElevation ? toolbarElevation : 0);
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
+            toolbar.setElevation(setElevation ? toolbarElevation : 0);
+        }
     }
 }

app/src/full/java/com/topjohnwu/magisk/SuRequestActivity.java

@@ -25,6 +25,7 @@ import com.topjohnwu.magisk.utils.SuConnector;
 import java.io.IOException;
 
 import androidx.annotation.Nullable;
+import androidx.appcompat.content.res.AppCompatResources;
 import butterknife.BindView;
 
 public class SuRequestActivity extends BaseActivity {
@@ -125,7 +126,8 @@ public class SuRequestActivity extends BaseActivity {
         appIcon.setImageDrawable(policy.info.loadIcon(pm));
         appNameView.setText(policy.appName);
         packageNameView.setText(policy.packageName);
-        warning.setCompoundDrawablesRelativeWithIntrinsicBounds(getDrawable(R.drawable.ic_warning), null, null, null);
+        warning.setCompoundDrawablesRelativeWithIntrinsicBounds(
+                AppCompatResources.getDrawable(this, R.drawable.ic_warning), null, null, null);
 
         ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(this,
                 R.array.allow_timeout, android.R.layout.simple_spinner_item);

app/src/full/java/com/topjohnwu/magisk/components/BaseActivity.java

@@ -20,6 +20,7 @@ import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 import androidx.annotation.StyleRes;
 import androidx.appcompat.app.AppCompatActivity;
+import androidx.appcompat.app.AppCompatDelegate;
 import androidx.core.app.ActivityCompat;
 import androidx.core.content.ContextCompat;
 
@@ -33,6 +34,10 @@ public abstract class BaseActivity extends AppCompatActivity implements Topic.Au
     private ActivityResultListener activityResultListener;
     public App app = App.self;
 
+    static {
+        AppCompatDelegate.setCompatVectorFromResourcesEnabled(true);
+    }
+
     @Override
     public int[] getSubscribedTopics() {
         return EMPTY_INT_ARRAY;

app/src/full/java/com/topjohnwu/magisk/fragments/LogFragment.java

@@ -1,6 +1,7 @@
 package com.topjohnwu.magisk.fragments;
 
 
+import android.os.Build;
 import android.os.Bundle;
 import android.view.LayoutInflater;
 import android.view.View;
@@ -27,7 +28,9 @@ public class LogFragment extends BaseFragment {
         View v = inflater.inflate(R.layout.fragment_log, container, false);
         unbinder = new LogFragment_ViewBinding(this, v);
 
-        ((MainActivity) requireActivity()).toolbar.setElevation(0);
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
+            ((MainActivity) requireActivity()).toolbar.setElevation(0);
+        }
 
         TabFragmentAdapter adapter = new TabFragmentAdapter(getChildFragmentManager());
 

app/src/full/java/com/topjohnwu/magisk/fragments/SettingsFragment.java

@@ -37,7 +37,7 @@ import androidx.preference.PreferenceFragmentCompat;
 import androidx.preference.PreferenceGroupAdapter;
 import androidx.preference.PreferenceScreen;
 import androidx.preference.PreferenceViewHolder;
-import androidx.preference.SwitchPreference;
+import androidx.preference.SwitchPreferenceCompat;
 import androidx.recyclerview.widget.RecyclerView;
 
 public class SettingsFragment extends PreferenceFragmentCompat
@@ -105,8 +105,8 @@ public class SettingsFragment extends PreferenceFragmentCompat
         suNotification = (ListPreference) findPreference(Const.Key.SU_NOTIFICATION);
         multiuserConfig = (ListPreference) findPreference(Const.Key.SU_MULTIUSER_MODE);
         nsConfig = (ListPreference) findPreference(Const.Key.SU_MNT_NS);
-        SwitchPreference reauth = (SwitchPreference) findPreference(Const.Key.SU_REAUTH);
+        SwitchPreferenceCompat reauth = (SwitchPreferenceCompat) findPreference(Const.Key.SU_REAUTH);
-        SwitchPreference fingerprint = (SwitchPreference) findPreference(Const.Key.SU_FINGERPRINT);
+        SwitchPreferenceCompat fingerprint = (SwitchPreferenceCompat) findPreference(Const.Key.SU_FINGERPRINT);
 
         updateChannel.setOnPreferenceChangeListener((p, o) -> {
             String prev =String.valueOf(Data.updateChannel);
@@ -182,7 +182,7 @@ public class SettingsFragment extends PreferenceFragmentCompat
         int i = 1;
         for (Locale locale : LocaleManager.locales) {
             entries[i] = locale.getDisplayName(locale);
-            entryValues[i++] = locale.toLanguageTag();
+            entryValues[i++] = LocaleManager.toLanguageTag(locale);
         }
         lp.setEntries(entries);
         lp.setEntryValues(entryValues);
@@ -264,10 +264,10 @@ public class SettingsFragment extends PreferenceFragmentCompat
         String key = preference.getKey();
         switch (key) {
             case Const.Key.SU_FINGERPRINT:
-                boolean checked = ((SwitchPreference) preference).isChecked();
+                boolean checked = ((SwitchPreferenceCompat) preference).isChecked();
-                ((SwitchPreference) preference).setChecked(!checked);
+                ((SwitchPreferenceCompat) preference).setChecked(!checked);
                 FingerprintHelper.showAuthDialog(requireActivity(), () -> {
-                    ((SwitchPreference) preference).setChecked(checked);
+                    ((SwitchPreferenceCompat) preference).setChecked(checked);
                     app.mDB.setSettings(key, checked ? 1 : 0);
                 });
                 break;

app/src/full/res/layout/activity_about.xml

@@ -39,7 +39,7 @@
                         android:padding="16dp">
 
                         <ImageView
-                            app:srcCompat="@drawable/ic_logo"
+                            app:srcCompat="@drawable/ic_launcher"
                             android:layout_width="72dp"
                             android:layout_height="match_parent"
                             android:layout_gravity="center_vertical" />

app/src/full/res/layout/fragment_magisk.xml

@@ -343,7 +343,7 @@
                         android:layout_alignParentStart="true"
                         android:layout_centerVertical="true"
                         android:layout_marginEnd="5dp"
-                        app:srcCompat="@drawable/ic_logo" />
+                        app:srcCompat="@drawable/ic_launcher" />
 
                     <TextView
                         android:id="@+id/install_text"

app/src/full/res/layout/list_item_app.xml

@@ -3,6 +3,7 @@
 <androidx.cardview.widget.CardView
     xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:card_view="http://schemas.android.com/apk/res-auto"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
     android:layout_width="fill_parent"
     android:layout_height="wrap_content"
     android:layout_gravity="center"
@@ -68,7 +69,7 @@
             android:layout_height="wrap_content"
             android:focusable="false"
             android:layout_gravity="center_vertical"
-            android:src="@drawable/ic_menu_overflow_material"
+            app:srcCompat="@drawable/ic_menu_overflow_material"
             android:checked="false" />
 
     </LinearLayout>

app/src/full/res/layout/section.xml

@@ -6,7 +6,7 @@
     android:gravity="center_vertical"
     android:paddingStart="16dp"
     android:textAllCaps="true"
-    android:textColor="?android:colorAccent"
+    android:textColor="?colorAccent"
     android:background="@android:color/transparent"
     android:textSize="16sp"
     android:id="@+id/section_text"

app/src/full/res/menu/menu_repo.xml

@@ -4,6 +4,7 @@
 
     <item
         android:id="@+id/repo_sort"
+        android:title=""
         android:icon="@drawable/ic_sort"
         app:showAsAction="always"/>
 

app/src/full/res/values-sw600dp/styles.xml

@@ -1,17 +1,13 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
 
-    <style name="AppTheme.StatusBar" parent="AppTheme">
+    <style name="AppTheme.NoDrawer" parent="AppTheme">
-        <item name="android:statusBarColor">@android:color/transparent</item>
-        <item name="android:navigationBarColor">@android:color/transparent</item>
         <item name="android:colorBackgroundCacheHint">@null</item>
         <item name="android:windowIsTranslucent">true</item>
         <item name="android:windowNoTitle">true</item>
     </style>
 
-    <style name="AppTheme.StatusBar.Dark" parent="AppTheme.Dark">
+    <style name="AppTheme.NoDrawer.Dark" parent="AppTheme.Dark">
-        <item name="android:statusBarColor">@android:color/transparent</item>
-        <item name="android:navigationBarColor">@android:color/transparent</item>
         <item name="android:colorBackgroundCacheHint">@null</item>
         <item name="android:windowIsTranslucent">true</item>
         <item name="android:windowNoTitle">true</item>

app/src/full/res/values-v19/styles.xml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+
+    <style name="SplashTheme" parent="Theme.AppCompat.NoActionBar">
+        <item name="android:windowBackground">@drawable/ic_splash_activity</item>
+        <item name="android:windowTranslucentStatus">true</item>
+        <item name="android:windowTranslucentNavigation">true</item>
+    </style>
+</resources>

app/src/full/res/values-v21/styles.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+
+    <style name="AppTheme" parent="AppTheme.Base">
+        <item name="android:windowDrawsSystemBarBackgrounds">true</item>
+        <item name="android:statusBarColor">@android:color/transparent</item>
+    </style>
+
+    <style name="AppTheme.Dark" parent="AppTheme.Dark.Base">
+        <item name="android:windowDrawsSystemBarBackgrounds">true</item>
+        <item name="android:statusBarColor">@android:color/transparent</item>
+    </style>
+</resources>

app/src/full/res/values/styles.xml

@@ -1,42 +1,35 @@
 <resources>
 
-    <!-- Base application theme. -->
+    <style name="AppTheme.Base" parent="Theme.AppCompat.Light.NoActionBar">
-    <style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
         <item name="colorPrimary">@color/primary</item>
         <item name="colorPrimaryDark">@color/primary_dark</item>
         <item name="colorAccent">@color/accent</item>
         <item name="colorAccentFallback">@color/accentFallback</item>
         <item name="windowActionModeOverlay">true</item>
-        <item name="android:windowDrawsSystemBarBackgrounds">true</item>
         <item name="cardStyle">@style/CardViewStyle.Light</item>
         <item name="windowActionBar">false</item>
         <item name="windowNoTitle">true</item>
-        <item name="android:statusBarColor">@android:color/transparent</item>
         <item name="imageColorTint">@android:color/secondary_text_light</item>
-        <item name="preferenceTheme">@style/PreferenceThemeOverlay.v14.Material</item>
     </style>
 
-    <style name="AppTheme.Dark" parent="Theme.AppCompat.NoActionBar">
+    <style name="AppTheme" parent="AppTheme.Base"/>
+
+    <style name="AppTheme.Dark.Base" parent="Theme.AppCompat.NoActionBar">
         <item name="colorAccent">@color/accent</item>
         <item name="colorAccentFallback">@color/accentFallback</item>
         <item name="windowActionModeOverlay">true</item>
-        <item name="android:windowDrawsSystemBarBackgrounds">true</item>
         <item name="cardStyle">@style/CardViewStyle.Dark</item>
         <item name="windowActionBar">false</item>
         <item name="windowNoTitle">true</item>
-        <item name="android:statusBarColor">@android:color/transparent</item>
         <item name="android:textColorSecondary">@color/dark_secondary_text</item>
         <item name="imageColorTint">@color/dark_secondary_text</item>
-        <item name="preferenceTheme">@style/PreferenceThemeOverlay.v14.Material</item>
     </style>
 
-    <style name="AppTheme.Translucent" parent="Theme.AppCompat.NoActionBar">
+    <style name="AppTheme.Dark" parent="AppTheme.Dark.Base"/>
-        <item name="android:windowNoTitle">true</item>
+
-        <item name="android:windowBackground">@android:color/transparent</item>
+    <style name="AppTheme.NoDrawer" parent="AppTheme.Base"/>
-        <item name="android:colorBackgroundCacheHint">@null</item>
+
-        <item name="android:windowIsTranslucent">true</item>
+    <style name="AppTheme.NoDrawer.Dark" parent="AppTheme.Dark.Base"/>
-        <item name="android:windowAnimationStyle">@android:style/Animation</item>
-    </style>
 
     <style name="CardViewStyle.Dark" parent="CardView">
         <item name="cardBackgroundColor">@color/card_background_color_dark</item>
@@ -46,18 +39,8 @@
         <item name="cardBackgroundColor">@color/card_background_color_light</item>
     </style>
 
-    <style name="AppTheme.StatusBar" parent="AppTheme">
-        <item name="android:statusBarColor">?attr/colorPrimaryDark</item>
-    </style>
-
-    <style name="AppTheme.StatusBar.Dark" parent="AppTheme.Dark">
-        <item name="android:statusBarColor">?attr/colorPrimaryDark</item>
-    </style>
-
     <style name="SplashTheme" parent="Theme.AppCompat.NoActionBar">
         <item name="android:windowBackground">@drawable/ic_splash_activity</item>
-        <item name="android:windowTranslucentStatus">true</item>
-        <item name="android:windowTranslucentNavigation">true</item>
     </style>
 
     <style name="SuRequest" parent="Theme.AppCompat.Light.Dialog">

app/src/full/res/xml/app_settings.xml

@@ -1,10 +1,10 @@
-<PreferenceScreen
+<androidx.preference.PreferenceScreen
     xmlns:android="http://schemas.android.com/apk/res/android">
     <PreferenceCategory
         android:key="general"
         android:title="@string/settings_general_category">
 
-        <SwitchPreference
+        <SwitchPreferenceCompat
             android:key="dark_theme"
             android:title="@string/settings_dark_theme_title"
             android:summary="@string/settings_dark_theme_summary" />
@@ -35,7 +35,7 @@
         android:key="update"
         android:title="@string/settings_update">
 
-        <SwitchPreference
+        <SwitchPreferenceCompat
             android:key="check_update"
             android:defaultValue="true"
             android:title="@string/settings_check_update_title"
@@ -61,12 +61,12 @@
         android:key="magisk"
         android:title="@string/magisk">
 
-        <SwitchPreference
+        <SwitchPreferenceCompat
             android:key="disable"
             android:title="@string/settings_core_only_title"
             android:summary="@string/settings_core_only_summary" />
 
-        <SwitchPreference
+        <SwitchPreferenceCompat
             android:key="magiskhide"
             android:title="@string/magiskhide"
             android:summary="@string/settings_magiskhide_summary" />
@@ -118,16 +118,16 @@
             android:entries="@array/su_notification"
             android:entryValues="@array/value_array" />
 
-        <SwitchPreference
+        <SwitchPreferenceCompat
             android:key="su_fingerprint"
             android:title="@string/settings_su_fingerprint_title"
             android:summary="@string/settings_su_fingerprint_summary"/>
 
-        <SwitchPreference
+        <SwitchPreferenceCompat
             android:key="su_reauth"
             android:title="@string/settings_su_reauth_title"
             android:summary="@string/settings_su_reauth_summary"/>
 
     </PreferenceCategory>
 
-</PreferenceScreen>
+</androidx.preference.PreferenceScreen>

app/src/main/res/values-v21/drawables.xml

@@ -1,4 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<resources>
-    <drawable name="ic_launcher">@drawable/ic_logo</drawable>
-</resources>

app/src/stub/res/values/drawables.xml

@@ -1,4 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<resources>
-    <drawable name="ic_launcher">@android:drawable/sym_def_app_icon</drawable>
-</resources>

core/src/main/java/com/topjohnwu/core/utils/LocaleManager.java

@@ -52,6 +52,40 @@ public class LocaleManager {
         }
     }
 
+    public static String toLanguageTag(Locale loc) {
+        if (Build.VERSION.SDK_INT >= 21) {
+            return loc.toLanguageTag();
+        } else {
+            String language = loc.getLanguage();
+            String country = loc.getCountry();
+            String variant = loc.getVariant();
+            if (language.isEmpty() || !language.matches("\\p{Alpha}{2,8}")) {
+                language = "und";       // Follow the Locale#toLanguageTag() implementation
+            } else if (language.equals("iw")) {
+                language = "he";        // correct deprecated "Hebrew"
+            } else if (language.equals("in")) {
+                language = "id";        // correct deprecated "Indonesian"
+            } else if (language.equals("ji")) {
+                language = "yi";        // correct deprecated "Yiddish"
+            }
+            // ensure valid country code, if not well formed, it's omitted
+            if (!country.matches("\\p{Alpha}{2}|\\p{Digit}{3}")) {
+                country = "";
+            }
+
+            // variant subtags that begin with a letter must be at least 5 characters long
+            if (!variant.matches("\\p{Alnum}{5,8}|\\p{Digit}\\p{Alnum}{3}")) {
+                variant = "";
+            }
+            StringBuilder tag = new StringBuilder(language);
+            if (!country.isEmpty())
+                tag.append('-').append(country);
+            if (!variant.isEmpty())
+                tag.append('-').append(variant);
+            return tag.toString();
+        }
+    }
+
     public static void setLocale(App app) {
         String localeConfig = app.prefs.getString(Const.Key.LOCALE, "");
         if (localeConfig.isEmpty()) {