UncaughtExceptionHandler can't start activities

Question

I can't find a solution to this problem. I have created an Application class, where I am setting the default uncaught exception handler, and I want to start an activity from there when an exception occurrs:

public final class Application extends android.app.Application {
    public Application() {
        Thread.setDefaultUncaughtExceptionHandler(new Application.UncaughtExceptionHandler());
    }
    static Context context;

    static final class UncaughtExceptionHandler implements Thread.UncaughtExceptionHandler {
        @Override
        public void uncaughtException(@NonNull Thread t, @NonNull Throwable e) {
            context.startActivity(new Intent()
                            .setClass(context, RuntimeException.class)
                            .setFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
                            /*.putExtra("u", true).putExtra("e", e)*/);
            //System.exit(0);
        }
    }

    @Override
    public void onCreate() {
        super.onCreate();
        context = getApplicationContext();
    }
}

This is the RuntimeException class, it is also defined in the manifest:

public class RuntimeException extends Activity {
    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.a_exception);

        Bundle extras = getIntent().getExtras();
        boolean uncaught = extras.getBoolean("u", false);
        Throwable exception = (Throwable) extras.get("e");

        String exceptionType;
        if (uncaught) exceptionType = "Uncaught exception:\n"; else exceptionType = "Exception:\n";

        TextView msg = findViewById(R.id.ex_msg);
        msg.setText(exceptionType + exception.getLocalizedMessage());
    }
}

This is the manifest:

<application
        android:name=".application.Application"
        android:allowBackup="true"
        android:dataExtractionRules="@xml/data_extraction_rules"
        android:fullBackupContent="@xml/backup_rules"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/Theme.MyTheme"
        tools:targetApi="31">
        <activity
            android:name=".activity.Launcher"
            android:exported="true">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity android:name=".activity.FileList"/>
        <activity android:name=".activity.RuntimeException"/>
    </application>

Answer 1

Should kill process after calling startActivity

static final class UncaughtExceptionHandler implements Thread.UncaughtExceptionHandler {
        @Override
        public void uncaughtException(@NonNull Thread t, @NonNull Throwable e) {
            context.startActivity(new Intent()
                            .setClass(context, RuntimeException.class)
                            .setFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
                            /*.putExtra("u", true).putExtra("e", e)*/);
             android.os.Process.killProcess(android.os.Process.myPid());
             System.exit(0);
        }
    }