MyGame/app/src/main/java/com/example/mygame/InstructionsActivity.java - master - arti4/IndividualProject

MyGame/app/src/main/java/com/example/mygame/InstructionsActivity.java
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18 ноя 2025, 12:41
18 ноя 2025, 12:41f3a2f8a
package com.example.mygame;

import android.content.Context;
import android.content.SharedPreferences;
import android.graphics.Canvas;
import android.os.Bundle;
import android.util.AttributeSet;
import android.util.DisplayMetrics;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;
import android.widget.Button;
import android.widget.RelativeLayout;

import androidx.activity.OnBackPressedCallback;
import androidx.appcompat.app.AppCompatActivity;

public class InstructionsActivity extends AppCompatActivity {
    private BackgroundLayer backgroundLayer;
    private MenuBackgroundView backgroundView;
    private MenuThread menuThread;
    private float cameraX = 0f;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        requestWindowFeature(Window.FEATURE_NO_TITLE);
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
                WindowManager.LayoutParams.FLAG_FULLSCREEN);

        setContentView(R.layout.activity_instructions);

        RelativeLayout rootLayout = findViewById(R.id.rootLayout);
        if (rootLayout != null) {
            backgroundView = new MenuBackgroundView(this);
            rootLayout.addView(backgroundView, 0);
        }

        DisplayMetrics displayMetrics = new DisplayMetrics();
        getWindowManager().getDefaultDisplay().getMetrics(displayMetrics);
        int screenWidth = displayMetrics.widthPixels;
        int screenHeight = displayMetrics.heightPixels;

        backgroundLayer = new BackgroundLayer(this, screenWidth, screenHeight, 1.0f);
        if (backgroundView != null) {
            backgroundView.setBackgroundLayer(backgroundLayer);
        }

        setupBackButton();
        setupBackPressedHandler();
    }
    @Override
    protected void onResume() {
        super.onResume();
        startMenuAnimation();
    }

    @Override
    protected void onPause() {
        super.onPause();
        stopMenuAnimation();
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        stopMenuAnimation();
        if (backgroundLayer != null) {
            backgroundLayer.release();
        }
    }

    private void startMenuAnimation() {
        if (menuThread == null) {
            menuThread = new MenuThread();
            menuThread.setRunning(true);
            menuThread.start();
        }
    }

    private void stopMenuAnimation() {
        if (menuThread != null) {
            menuThread.setRunning(false);
            menuThread = null;
        }
    }

    private void setupBackButton() {
        Button backButton = findViewById(R.id.backButton);
        backButton.setOnClickListener(v -> goBackToMainMenu());
    }

    private void setupBackPressedHandler() {
        getOnBackPressedDispatcher().addCallback(this, new OnBackPressedCallback(true) {
            @Override
            public void handleOnBackPressed() {
                goBackToMainMenu();
            }
        });
    }

    private void goBackToMainMenu() {
        finish();
        overridePendingTransition(android.R.anim.fade_in, android.R.anim.fade_out);
    }

    private class MenuThread extends Thread {
        private boolean running;
        private long lastTime = System.currentTimeMillis();

        public void setRunning(boolean running) {
            this.running = running;
        }

        @Override
        public void run() {
            while (running) {
                long currentTime = System.currentTimeMillis();
                long elapsedTime = currentTime - lastTime;

                cameraX += 0.5f;
                if (backgroundLayer != null) {
                    backgroundLayer.update(cameraX);
                }

                runOnUiThread(new Runnable() {
                    @Override
                    public void run() {
                        if (backgroundView != null) {
                            backgroundView.setCameraX(cameraX);
                            backgroundView.invalidate();
                        }
                    }
                });

                try {
                    Thread.sleep(16);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
                lastTime = currentTime;
            }
        }
    }

    private static class MenuBackgroundView extends View {
        private BackgroundLayer backgroundLayer;
        private float cameraX = 0f;

        public MenuBackgroundView(Context context) {
            super(context);
        }

        public MenuBackgroundView(Context context, AttributeSet attrs) {
            super(context, attrs);
        }

        public MenuBackgroundView(Context context, AttributeSet attrs, int defStyle) {
            super(context, attrs, defStyle);
        }

        public void setBackgroundLayer(BackgroundLayer backgroundLayer) {
            this.backgroundLayer = backgroundLayer;
        }

        public void setCameraX(float cameraX) {
            this.cameraX = cameraX;
        }

        @Override
        protected void onDraw(Canvas canvas) {
            super.onDraw(canvas);
            if (backgroundLayer != null) {
                backgroundLayer.draw(canvas, cameraX);
            }
        }
    }
}