Fix app crashes in CopyTextBottomSheetFragment. Add LockScreenActivity.

app/build.gradle

@@ -176,6 +176,8 @@ dependencies {
     implementation "androidx.startup:startup-runtime:1.0.0"
     implementation 'com.github.FunkyMuse:Crashy:1.1.0'
 
+    implementation "androidx.lifecycle:lifecycle-extensions:2.2.0"
+
 
 /**** Builds and flavors ****/
     // debugImplementation because LeakCanary should only run in debug builds.

app/src/main/AndroidManifest.xml

@@ -32,7 +32,10 @@
         android:theme="@style/AppTheme"
         android:usesCleartextTraffic="true"
         tools:replace="android:label">
-        <activity android:name=".activities.AnonymousSubscriptionsActivity"
+        <activity android:name=".activities.LockScreenActivity"
+            android:theme="@style/AppTheme.NoActionBar" />
+        <activity
+            android:name=".activities.AnonymousSubscriptionsActivity"
             android:label="@string/subscriptions"
             android:parentActivityName=".activities.MainActivity"
             android:theme="@style/AppTheme.NoActionBar" />

app/src/main/java/ml/docilealligator/infinityforreddit/AppComponent.java

@@ -21,11 +21,12 @@ import ml.docilealligator.infinityforreddit.activities.FullMarkdownActivity;
 import ml.docilealligator.infinityforreddit.activities.GiveAwardActivity;
 import ml.docilealligator.infinityforreddit.activities.InboxActivity;
 import ml.docilealligator.infinityforreddit.activities.LinkResolverActivity;
+import ml.docilealligator.infinityforreddit.activities.LockScreenActivity;
 import ml.docilealligator.infinityforreddit.activities.LoginActivity;
 import ml.docilealligator.infinityforreddit.activities.MainActivity;
 import ml.docilealligator.infinityforreddit.activities.MultiredditSelectionActivity;
-import ml.docilealligator.infinityforreddit.activities.PostFilterUsageListingActivity;
 import ml.docilealligator.infinityforreddit.activities.PostFilterPreferenceActivity;
+import ml.docilealligator.infinityforreddit.activities.PostFilterUsageListingActivity;
 import ml.docilealligator.infinityforreddit.activities.PostImageActivity;
 import ml.docilealligator.infinityforreddit.activities.PostLinkActivity;
 import ml.docilealligator.infinityforreddit.activities.PostTextActivity;
@@ -263,4 +264,6 @@ public interface AppComponent {
     void inject(CrashReportsFragment crashReportsFragment);
 
     void inject(AnonymousSubscriptionsActivity anonymousSubscriptionsActivity);
+
+    void inject(LockScreenActivity lockScreenActivity);
 }

app/src/main/java/ml/docilealligator/infinityforreddit/Infinity.java

@@ -7,6 +7,7 @@ import android.os.Bundle;
 
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
+import androidx.lifecycle.LifecycleObserver;
 
 import com.evernote.android.state.StateSaver;
 import com.livefront.bridge.Bridge;
@@ -18,7 +19,7 @@ import ml.docilealligator.infinityforreddit.broadcastreceivers.NetworkWifiStatus
 import ml.docilealligator.infinityforreddit.events.ChangeNetworkStatusEvent;
 import ml.docilealligator.infinityforreddit.utils.Utils;
 
-public class Infinity extends Application {
+public class Infinity extends Application implements LifecycleObserver {
     private AppComponent mAppComponent;
     private NetworkWifiStatusReceiver mNetworkWifiStatusReceiver;
 
@@ -26,12 +27,49 @@ public class Infinity extends Application {
     public void onCreate() {
         super.onCreate();
 
-        //RedScreenOfDeath.init(this);
-
         mAppComponent = DaggerAppComponent.builder()
                 .appModule(new AppModule(this))
                 .build();
 
+        //ProcessLifecycleOwner.get().getLifecycle().addObserver(this);
+
+        /*registerActivityLifecycleCallbacks(new ActivityLifecycleCallbacks() {
+            @Override
+            public void onActivityCreated(@NonNull Activity activity, @Nullable Bundle bundle) {
+                activity.getWindow().setFlags(WindowManager.LayoutParams.FLAG_SECURE, WindowManager.LayoutParams.FLAG_SECURE);
+            }
+
+            @Override
+            public void onActivityStarted(@NonNull Activity activity) {
+
+            }
+
+            @Override
+            public void onActivityResumed(@NonNull Activity activity) {
+
+            }
+
+            @Override
+            public void onActivityPaused(@NonNull Activity activity) {
+
+            }
+
+            @Override
+            public void onActivityStopped(@NonNull Activity activity) {
+
+            }
+
+            @Override
+            public void onActivitySaveInstanceState(@NonNull Activity activity, @NonNull Bundle bundle) {
+
+            }
+
+            @Override
+            public void onActivityDestroyed(@NonNull Activity activity) {
+
+            }
+        });*/
+
         Bridge.initialize(getApplicationContext(), new SavedStateHandler() {
             @Override
             public void saveInstanceState(@NonNull Object target, @NonNull Bundle state) {
@@ -51,6 +89,16 @@ public class Infinity extends Application {
         registerReceiver(mNetworkWifiStatusReceiver, new IntentFilter(ConnectivityManager.CONNECTIVITY_ACTION));
     }
 
+//    @OnLifecycleEvent(Lifecycle.Event.ON_START)
+//    public void appInForeground(){
+//        Toast.makeText(this, "Foreground", Toast.LENGTH_SHORT).show();
+//    }
+//
+//    @OnLifecycleEvent(Lifecycle.Event.ON_STOP)
+//    public void appInBackground(){
+//        Toast.makeText(this, "Background", Toast.LENGTH_SHORT).show();
+//    }
+
     public AppComponent getAppComponent() {
         return mAppComponent;
     }

app/src/main/java/ml/docilealligator/infinityforreddit/activities/LockScreenActivity.java

@@ -0,0 +1,85 @@
+package ml.docilealligator.infinityforreddit.activities;
+
+import android.content.SharedPreferences;
+import android.os.Bundle;
+
+import androidx.annotation.NonNull;
+import androidx.biometric.BiometricManager;
+import androidx.biometric.BiometricPrompt;
+import androidx.core.content.ContextCompat;
+
+import java.util.concurrent.Executor;
+
+import javax.inject.Inject;
+import javax.inject.Named;
+
+import ml.docilealligator.infinityforreddit.Infinity;
+import ml.docilealligator.infinityforreddit.R;
+import ml.docilealligator.infinityforreddit.customtheme.CustomThemeWrapper;
+
+import static androidx.biometric.BiometricManager.Authenticators.BIOMETRIC_STRONG;
+import static androidx.biometric.BiometricManager.Authenticators.DEVICE_CREDENTIAL;
+
+public class LockScreenActivity extends BaseActivity {
+
+    @Inject
+    @Named("default")
+    SharedPreferences mSharedPreferences;
+    @Inject
+    CustomThemeWrapper mCustomThemeWrapper;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        ((Infinity) getApplication()).getAppComponent().inject(this);
+
+        setImmersiveModeNotApplicable();
+
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_look_screen);
+
+        applyCustomTheme();
+
+        BiometricManager biometricManager = BiometricManager.from(this);
+        if (biometricManager.canAuthenticate(BIOMETRIC_STRONG | DEVICE_CREDENTIAL) == BiometricManager.BIOMETRIC_SUCCESS) {
+            Executor executor = ContextCompat.getMainExecutor(this);
+            BiometricPrompt biometricPrompt = new BiometricPrompt(this,
+                    executor, new BiometricPrompt.AuthenticationCallback() {
+                @Override
+                public void onAuthenticationSucceeded(
+                        @NonNull BiometricPrompt.AuthenticationResult result) {
+                    super.onAuthenticationSucceeded(result);
+                    finish();
+                }
+            });
+
+            BiometricPrompt.PromptInfo promptInfo = new BiometricPrompt.PromptInfo.Builder()
+                    .setTitle(getString(R.string.unlock_account_section))
+                    .setAllowedAuthenticators(BIOMETRIC_STRONG | DEVICE_CREDENTIAL)
+                    .build();
+
+            biometricPrompt.authenticate(promptInfo);
+        } else {
+            finish();
+        }
+    }
+
+    @Override
+    protected SharedPreferences getDefaultSharedPreferences() {
+        return mSharedPreferences;
+    }
+
+    @Override
+    protected CustomThemeWrapper getCustomThemeWrapper() {
+        return mCustomThemeWrapper;
+    }
+
+    @Override
+    protected void applyCustomTheme() {
+
+    }
+
+    @Override
+    public void onBackPressed() {
+        moveTaskToBack(true);
+    }
+}

app/src/main/java/ml/docilealligator/infinityforreddit/bottomsheetfragments/CopyTextBottomSheetFragment.java

@@ -39,6 +39,7 @@ public class CopyTextBottomSheetFragment extends RoundedBottomSheetDialogFragmen
     TextView copyAllMarkdownTextView;
 
     private Activity activity;
+    private String markdownText;
 
     public CopyTextBottomSheetFragment() {
         // Required empty public constructor
@@ -53,7 +54,10 @@ public class CopyTextBottomSheetFragment extends RoundedBottomSheetDialogFragmen
         ButterKnife.bind(this, rootView);
 
         String rawText = getArguments().getString(EXTRA_RAW_TEXT);
-        String markdownText = getArguments().getString(EXTRA_MARKDOWN).replaceAll("<sup>", "^").replaceAll("</sup>", "");
+        markdownText = getArguments().getString(EXTRA_MARKDOWN);
+        if (markdownText != null) {
+            markdownText = markdownText.replaceAll("<sup>", "^").replaceAll("</sup>", "");
+        }
 
         copyRawTextTextView.setOnClickListener(view -> {
             showCopyDialog(rawText);

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

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".activities.LockScreenActivity">
+
+</androidx.constraintlayout.widget.ConstraintLayout>