make it compile again

maybe i can finally actually fix the bug where it crashes randomly for
some people

Author: tckmn

.gitignore

@@ -3,3 +3,4 @@ shared
 .externalNativeBuild
 .gradle
 keystore.properties
+.cxx

build.gradle

@@ -11,7 +11,7 @@ buildscript {
     }
 
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.4.1'
+        classpath 'com.android.tools.build:gradle:4.1.0'
     }
 }
 
@@ -33,7 +33,8 @@ dependencies {
 }
 
 android {
-    compileSdkVersion 28
+    compileSdkVersion 30
+    ndkVersion '22.0.7026061'
 
     lintOptions {
         disable "GoogleAppIndexingWarning"
@@ -42,7 +43,7 @@ android {
     defaultConfig {
         applicationId "mn.tck.semitone"
         minSdkVersion 16
-        targetSdkVersion 28
+        targetSdkVersion 30
         versionCode 3
         versionName "1.2"
         externalNativeBuild {
@@ -69,11 +70,11 @@ android {
         }
     }
 
-    sourceSets {
-        main {
-            jniLibs.srcDirs = ["shared"]
-        }
-    }
+    // sourceSets {
+    //     main {
+    //         jniLibs.srcDirs = ["shared"]
+    //     }
+    // }
 
     buildTypes {
         release {

src/main/java/mn.tck.semitone/MetronomeFragment.java

@@ -36,6 +36,7 @@
 import android.widget.SeekBar;
 
 import androidx.core.content.ContextCompat;
+import androidx.preference.PreferenceManager;
 
 import java.util.ArrayList;
 
@@ -76,9 +77,9 @@ public MetronomeFragment() {
 
     @Override public void onViewCreated(View view, Bundle state) {
         this.view = view;
-        
+
         SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(getContext());
-        SharedPreferences.Editor editor = sp.edit();
+        final SharedPreferences.Editor editor = sp.edit();
         tempo = sp.getInt("metronome_tempo", 120);
         beats = sp.getInt("metronome_beats", 4);
         subdiv = sp.getInt("metronome_subdiv", 1);