Fix errors reported by lint

app/build.gradle

@@ -29,6 +29,7 @@ android {
 
         testInstrumentationRunner 'androidx.test.runner.AndroidJUnitRunner'
         minSdkVersion 14
+        //noinspection ExpiredTargetSdkVersion
         targetSdkVersion 25
         /*
           The Android Testing Support Library collects analytics to continuously improve the testing

app/src/full/java/org/fdroid/fdroid/nearby/SwapWorkflowActivity.java

@@ -692,6 +692,7 @@ public class SwapWorkflowActivity extends AppCompatActivity {
 
     @Override
     public void onActivityResult(int requestCode, int resultCode, Intent intent) {
+        super.onActivityResult(requestCode, resultCode, intent);
         IntentResult scanResult = IntentIntegrator.parseActivityResult(requestCode, resultCode, intent);
         if (scanResult != null) {
             if (scanResult.getContents() != null) {

app/src/main/java/org/fdroid/fdroid/CleanCacheService21.java

@@ -5,13 +5,15 @@ import android.system.ErrnoException;
 import android.system.Os;
 import android.system.StructStat;
 
+import androidx.annotation.RequiresApi;
+
 import java.io.File;
 
 /**
  * Helper class to prevent {@link VerifyError}s from occurring in {@link CleanCacheService#clearOldFiles(File, long)}
  * due to the fact that {@link Os} was only introduced in API 21.
  */
-@TargetApi(21)
+@RequiresApi(21)
 class CleanCacheService21 {
     static void deleteIfOld(File file, long olderThan) {
         if (file == null || !file.exists()) {

app/src/main/java/org/fdroid/fdroid/compat/FileCompat.java

@@ -5,6 +5,8 @@ import android.os.Build;
 import android.system.ErrnoException;
 import android.util.Log;
 
+import androidx.annotation.RequiresApi;
+
 import org.fdroid.fdroid.FDroidApp;
 import org.fdroid.fdroid.Utils;
 import org.fdroid.fdroid.data.SanitizedFile;
@@ -40,6 +42,7 @@ public class FileCompat {
      * not attempt to load this class at runtime. Otherwise, using the Os.symlink method will cause
      * a VerifyError to be thrown at runtime when the FileCompat class is first used.
      */
+    @RequiresApi(Build.VERSION_CODES.LOLLIPOP)
     private static class Symlink21 {
 
         @TargetApi(21)

app/src/main/java/org/fdroid/fdroid/installer/DefaultInstallerActivity.java

@@ -158,6 +158,7 @@ public class DefaultInstallerActivity extends FragmentActivity {
 
     @Override
     protected void onActivityResult(int requestCode, int resultCode, Intent data) {
+        super.onActivityResult(requestCode, resultCode, data);
         switch (requestCode) {
             case REQUEST_CODE_INSTALL:
                 switch (resultCode) {

app/src/main/java/org/fdroid/fdroid/qr/CameraCharacteristicsMinApiLevel21.java

@@ -1,15 +1,16 @@
 package org.fdroid.fdroid.qr;
 
-import android.annotation.TargetApi;
 import android.content.Context;
 import android.hardware.camera2.CameraAccessException;
 import android.hardware.camera2.CameraCharacteristics;
 import android.hardware.camera2.CameraManager;
 import android.os.Build;
-import androidx.annotation.NonNull;
 import android.util.Log;
 
-@TargetApi(Build.VERSION_CODES.LOLLIPOP)
+import androidx.annotation.NonNull;
+import androidx.annotation.RequiresApi;
+
+@RequiresApi(Build.VERSION_CODES.LOLLIPOP)
 public class CameraCharacteristicsMinApiLevel21 extends CameraCharacteristicsChecker {
 
     private static final String TAG = "CameraCharMinApiLevel21";

app/src/main/java/org/fdroid/fdroid/views/AppDetailsActivity.java

@@ -306,6 +306,7 @@ public class AppDetailsActivity extends AppCompatActivity
 
     @Override
     protected void onActivityResult(int requestCode, int resultCode, Intent data) {
+        super.onActivityResult(requestCode, resultCode, data);
         switch (requestCode) {
             case REQUEST_ENABLE_BLUETOOTH:
                 fdroidApp.sendViaBluetooth(this, resultCode, app.packageName);

app/src/main/java/org/fdroid/fdroid/views/ManageReposActivity.java

@@ -140,6 +140,7 @@ public class ManageReposActivity extends AppCompatActivity
 
     @Override
     protected void onNewIntent(Intent intent) {
+        super.onNewIntent(intent);
         setIntent(intent);
     }
 

app/src/main/java/org/fdroid/fdroid/views/RepoDetailsActivity.java

@@ -173,6 +173,7 @@ public class RepoDetailsActivity extends AppCompatActivity {
 
     @Override
     public void onNewIntent(Intent i) {
+        super.onNewIntent(i);
         // onResume gets called after this to handle the intent
         setIntent(i);
     }

app/src/main/res/values-sw360dp-v13/values-preference.xml

@@ -1,4 +1,5 @@
+<!-- Taken from here: https://stackoverflow.com/a/53969021 -->
 <resources xmlns:tools="http://schemas.android.com/tools">
-    <bool name="config_materialPreferenceIconSpaceReserved" tools:ignore="MissingDefaultResource,PrivateResource">false</bool>
+    <bool name="config_materialPreferenceIconSpaceReserved" tools:ignore="MissingDefaultResource,PrivateResource,UnusedResources">false</bool>
-    <dimen name="preference_category_padding_start" tools:ignore="MissingDefaultResource,PrivateResource">0dp</dimen>
+    <dimen name="preference_category_padding_start" tools:ignore="MissingDefaultResource,PrivateResource,UnusedResources">0dp</dimen>
 </resources>