Androidの一時停止/再開が機能しない

Question

一時停止/再開機能を有効にするためにプロジェクトにコードを追加しましたが、機能していません。ロジックは以下の通りです：

private void togglePausePlay() { 
     if (cg.paused) { 
      // play 
      Toast.makeText(MainActivity.this, "Play", Toast.LENGTH_SHORT).show(); 
     } else { 
      // pause 
      Toast.makeText(MainActivity.this, "Pause", Toast.LENGTH_SHORT).show(); 
     } 

     cg.paused = !cg.paused; 
    } 

の使用は、それが動作しません

Button button = new Button(this); 
      button.setText("Pause"); 
      button.setOnClickListener(new View.OnClickListener() { 
       @Override 
       public void onClick(View v) { 
        togglePausePlay(); 
       } 
      }); 
      menuLayout.addView(button); 

、次のようになります。私のファイル全体はあなたにもテキストを設定し、テキストを一時停止またはボタンで再生されるかどうかを確認することができます

package dev.android.gamex; 

import android.app.Activity; 
import android.content.Context; 
import android.graphics.Bitmap; 
import android.graphics.BitmapFactory; 
import android.graphics.Canvas; 
import android.graphics.Color; 
import android.graphics.drawable.Drawable; 
import android.os.Bundle; 
import android.os.Handler; 
import android.support.v4.view.MotionEventCompat; 
import android.support.v7.app.AppCompatActivity; 
import android.util.Log; 
import android.view.Menu; 
import android.view.MenuItem; 
import android.view.MotionEvent; 
import android.view.View; 
import android.view.Window; 
import android.widget.AdapterView; 
import android.widget.ArrayAdapter; 
import android.widget.Button; 
import android.widget.LinearLayout; 
import android.widget.Spinner; 
import android.widget.TextView; 
import android.widget.Toast; 

import java.util.Random; 

public class MainActivity extends AppCompatActivity implements AdapterView.OnItemSelectedListener { 
    public void onItemSelected(AdapterView<?> parent, View view, 
           int pos, long id) { 
     // An item was selected. You can retrieve the selected item using 
     Log.d("myTag", "This is my message" + parent.getItemAtPosition(pos)); 
     String name = "Jamie"; 
     String str = parent.getItemAtPosition(pos).toString(); 
     if (str.equals("Rookie")) { 
      cg = new CatchGame(this, 3, name, onScoreListener); 
      setContentView(cg); 
      getSupportActionBar().hide(); 
      setContentView(mainLayout); 
      Log.d("game", "Srtaed Rookie game"); 

     } else if (str.equals("Advanced")) { 
      mainLayout = new LinearLayout(this); 
      mainLayout.setOrientation(LinearLayout.VERTICAL); 

      LinearLayout menuLayout = new LinearLayout(this); 
      menuLayout.setBackgroundColor(Color.parseColor("#FFFFFF")); 

      textView = new TextView(this); 
      textView.setVisibility(View.VISIBLE); 
      str = "Score: 0"; 
      textView.setText(str); 
      menuLayout.addView(textView); 

      Button button = new Button(this); 
      button.setText("Pause"); 
      button.setOnClickListener(new View.OnClickListener() { 
       @Override 
       public void onClick(View v) { 
        togglePausePlay(); 
       } 
      }); 
      menuLayout.addView(button); 


      Spinner spinner2 = new Spinner(this); 
      spinner2.setOnItemSelectedListener(this); 
      ArrayAdapter<String> adapter = new ArrayAdapter<>(MainActivity.this, android.R.layout.simple_list_item_1, spinnerValue); 
      spinner2.setAdapter(adapter); 
      menuLayout.addView(spinner2); 

      mainLayout.addView(menuLayout); 

      cg = new CatchGame(this, 5, "Jamie", onScoreListener); 
      cg.setBackground(getResources().getDrawable(R.drawable.bg_land_mdpi)); 
      mainLayout.addView(cg); 
//    getWindow().requestFeature(Window.FEATURE_ACTION_BAR); 
      getSupportActionBar().hide(); 
      setContentView(mainLayout); 
      Log.d("game", "Srtaed Advanced game"); 
     } else if (str.equals("Expert")) { 
      cg = new CatchGame(this, 7, name, onScoreListener); 
      setContentView(cg); 
      getSupportActionBar().hide(); 
      setContentView(mainLayout); 
     } 
    } 

    public void onNothingSelected(AdapterView<?> parent) { 
     // Another interface callback 
    } 

    CatchGame cg; 
    public TextView textView; 
    public LinearLayout mainLayout; 
    String[] spinnerValue = {"Rookie", "Advanced", "Expert", "Master"}; 

    // start app 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     mainLayout = new LinearLayout(this); 
     mainLayout.setOrientation(LinearLayout.VERTICAL); 

     LinearLayout menuLayout = new LinearLayout(this); 
     menuLayout.setBackgroundColor(Color.parseColor("#FFFFFF")); 

     textView = new TextView(this); 
     textView.setVisibility(View.VISIBLE); 
     String str = "Score: 0"; 
     textView.setText(str); 
     menuLayout.addView(textView); 

     Button button = new Button(this); 
     button.setText("Pause"); 
     button.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       togglePausePlay(); 
      } 
     }); 
     menuLayout.addView(button); 


     Spinner spinner2 = new Spinner(this); 
     spinner2.setOnItemSelectedListener(this); 
     ArrayAdapter<String> adapter = new ArrayAdapter<>(MainActivity.this, android.R.layout.simple_list_item_1, spinnerValue); 
     spinner2.setAdapter(adapter); 
     menuLayout.addView(spinner2); 

     mainLayout.addView(menuLayout); 

     cg = new CatchGame(this, 5, "Jamie", onScoreListener); 
     cg.setBackground(getResources().getDrawable(R.drawable.bg_land_mdpi)); 
     mainLayout.addView(cg); 
     getWindow().requestFeature(Window.FEATURE_ACTION_BAR); 
     getSupportActionBar().hide(); 
     setContentView(mainLayout); 
    } 

    private void togglePausePlay() { 
     if (cg.paused) { 
      // play 
      Toast.makeText(MainActivity.this, "Play", Toast.LENGTH_SHORT).show(); 
     } else { 
      // pause 
      Toast.makeText(MainActivity.this, "Pause", Toast.LENGTH_SHORT).show(); 
     } 

     cg.paused = !cg.paused; 
    } 

    private OnScoreListener onScoreListener = new OnScoreListener() { 
     @Override 
     public void onScore(int score) { 
      textView.setText("Score: " + score); 
     } 
    }; 

    interface OnScoreListener { 
     void onScore(int score); 
    } 

    class CatchGame extends View { 
     int NBRSTEPS; // number of discrete positions in the x-dimension; must be uneven 
     String heroName; 
     int screenW; 
     int screenH; 
     int[] x; // x-coordinates for falling objects 
     int[] y; // y-coordinates for falling objects 
     int[] hero_positions; // x-coordinates for hero 
     Random random = new Random(); 
     int ballW; // width of each falling object 
     int ballH; // height of ditto 
     float dY; //vertical speed 
     Bitmap falling, hero, jamie2, jamieleft, jamieright, falling2; 
     int heroXCoord; 
     int heroYCoord; 
     int xsteps; 
     int score; 
     int offset; 
     boolean gameOver; // default value is false 
     boolean toastDisplayed; 
     boolean paused = false; 

     OnScoreListener onScoreListener; 

     // constructor, load images and get sizes 
     public CatchGame(Context context, int difficulty, String name, OnScoreListener onScoreListener) { 
      super(context); 
      NBRSTEPS = difficulty; 
      heroName = name; 
      this.onScoreListener = onScoreListener; 

      x = new int[NBRSTEPS]; 
      y = new int[NBRSTEPS]; 
      hero_positions = new int[NBRSTEPS]; 
      int resourceIdFalling = 0; 
      int resourceIdFalling2 = 0; 
      int resourceIdHero = 0; 
      if (heroName.equals("Jamie")) { 
       resourceIdFalling = R.mipmap.falling_object2; 
       resourceIdFalling2 = R.drawable.coconut_hdpi; 
       resourceIdHero = R.drawable.left_side_hdpi; 
       setBackground(getResources().getDrawable(R.mipmap.background)); 
      } 
      falling = BitmapFactory.decodeResource(getResources(), resourceIdFalling); //load a falling image 
      falling2 = BitmapFactory.decodeResource(getResources(), resourceIdFalling2); //load a falling image 
      hero = BitmapFactory.decodeResource(getResources(), resourceIdHero); //load a hero image 
      jamieleft = BitmapFactory.decodeResource(getResources(), R.drawable.left_side_hdpi); //load a hero image 
      jamieright = BitmapFactory.decodeResource(getResources(), R.drawable.right_side_hdpi); //load a hero image 
      ballW = falling.getWidth(); 
      ballH = falling.getHeight(); 
     } 

    /* public CatchGame(Context context, int difficulty, String name, OnScoreListener onScoreListener, Drawable background) { 
     this(context, difficulty, name, onScoreListener); 
     this.setBackground(background); 
    }*/ 

     // set coordinates, etc. 
     void initialize() { 
      if (!gameOver) { // run only once, when the game is first started 
       int maxOffset = (NBRSTEPS - 1)/2; 
       for (int i = 0; i < x.length; i++) { 
        int origin = (screenW/2) + xsteps * (i - maxOffset); 
        x[i] = origin - (ballW/2); 
        hero_positions[i] = origin - hero.getWidth(); 
       } 
       int heroWidth = hero.getWidth(); 
       int heroHeight = hero.getHeight(); 

       hero = Bitmap.createScaledBitmap(hero, heroWidth * 2, heroHeight * 2, true); 
       hero = Bitmap.createScaledBitmap(hero, heroWidth * 2, heroHeight * 2, true); 
       jamieleft = Bitmap.createScaledBitmap(jamieleft, jamieleft.getWidth() * 2, jamieright.getWidth() * 2, true); 
       jamieright = Bitmap.createScaledBitmap(jamieright, jamieright.getWidth() * 2, jamieright.getWidth() * 2, true); 

       heroYCoord = screenH - 2 * heroHeight; // bottom of screen 

      } 
      for (int i = 0; i < y.length; i++) { 
       y[i] = -random.nextInt(1000); // place items randomly in vertical direction 
      } 

      offset = (NBRSTEPS - 1)/2; // place hero at centre of the screen 
      heroXCoord = hero_positions[offset]; 

      // initialize or reset global attributes 
      dY = 2.0f; 
      score = 0; 
      gameOver = false; 
      toastDisplayed = false; 
     } 

     // method called when the screen opens 
     @Override 
     public void onSizeChanged(int w, int h, int oldw, int oldh) { 
      super.onSizeChanged(w, h, oldw, oldh); 
      screenW = w; 
      screenH = h; 
      xsteps = w/NBRSTEPS; 
      initialize(); 
     } 

     // method called when the "game over" toast has finished displaying 
     void restart(Canvas canvas) { 

      toastDisplayed = true; 
      initialize(); 
      draw(canvas); 
     } 

     // update the canvas in order to display the game action 
     @Override 
     public void onDraw(Canvas canvas) { 
      if (toastDisplayed) { 
       restart(canvas); 
       return; 
      } 
      super.onDraw(canvas); 

      int heroHeight = hero.getHeight(); 
      int heroWidth = hero.getWidth(); 
      int heroCentre = heroXCoord + heroWidth/2; 

      Context context = this.getContext(); 

      // compute locations of falling objects 
      for (int i = 0; i < y.length; i++) { 
       if (!paused) { 
        y[i] += (int) dY; 
       } 
       // if falling object hits bottom of screen 
       if (y[i] > (screenH - ballH) && !gameOver) { 
        dY = 0; 
        gameOver = true; 
        paused = true; 
        int duration = Toast.LENGTH_SHORT; 

        final Toast toast = Toast.makeText(context, "GAME OVER!\nScore: " + score, duration); 
        toast.show(); 
        Handler handler = new Handler(); 
        handler.postDelayed(new Runnable() { 
         @Override 
         public void run() { 
          toast.cancel(); 
          toastDisplayed = true; 
         } 
        }, 3000); 
        //Vibrator v = (Vibrator) context.getSystemService(context.VIBRATOR_SERVICE); 
        // Vibrate for 3000 milliseconds 
        //v.vibrate(3000); 

       } 
       // if the hero catches a falling object 
       if (x[i] < heroCentre && x[i] + ballW > heroCentre && 
         y[i] > screenH - ballH - heroHeight) { 

        y[i] = -random.nextInt(1000); // reset to new vertical position 
        score += 1; 
        onScoreListener.onScore(score); 
       } 

      } 

      canvas.save(); //Save the position of the canvas. 

      for (int i = 0; i < y.length; i++) { 
       if (i % 2 == 0) 
        canvas.drawBitmap(falling2, x[i], y[i], null); //Draw the falling on the canvas. 
       else 
        canvas.drawBitmap(falling, x[i], y[i], null); //Draw the falling on the canvas. 
      } 
      canvas.drawBitmap(hero, heroXCoord, heroYCoord, null); //Draw the hero on the canvas. 

      canvas.restore(); 
      //Call the next frame. 
      invalidate(); 
     } 

     // event listener for when the user touches the screen 
     @Override 
     public boolean onTouchEvent(MotionEvent event) { 
      if (paused) { 
       paused = false; 
      } 
      int action = MotionEventCompat.getActionMasked(event); 
      if (action != MotionEvent.ACTION_DOWN || gameOver) { // non-touchdown event or gameover 
       return true; // do nothing 
      } 
      int coordX = (int) event.getX(); 
      int xCentre = (screenW/2) - (hero.getWidth()/2); 
      int maxOffset = hero_positions.length - 1; // can't move outside right edge of screen 
      int minOffset = 0; // ditto left edge of screen 

      if (coordX < xCentre && offset > minOffset) { // touch event left of the centre of screen 
       offset--; // move hero to the left 

       if (coordX < heroXCoord)// + heroWidth/2) 
        hero = Bitmap.createScaledBitmap(jamieleft, jamieleft.getWidth(), jamieleft.getHeight(), true); 

      } 
      if (coordX > xCentre && offset < maxOffset) { // touch event right of the centre of screen 
       offset++; // move hero to the right 

       if (coordX > heroXCoord) 
        hero = Bitmap.createScaledBitmap(jamieright, jamieright.getWidth(), jamieright.getHeight(), true); 

      } 
      heroXCoord = hero_positions[offset]; 

      return true; 
     } 
    } 
} 

Answer 1

です。 または 既存のフラグを使用することができます。

Button button = new Button(this); 
      button.setText("Pause"); 
      button.setId(1); 
      button.setOnClickListener(new View.OnClickListener() { 
       @Override 
       public void onClick(View v) { 
        togglePausePlay(); 
       } 
      }); 
      menuLayout.addView(button); 

private void togglePausePlay() { 
     if (cg.paused) { 
      // play and change text to pause 
      button.setText("Pause") 
      cg.paused = false; 
     } else { 
      // pause and change text to play 
      button.setText("Play") 
      cg.paused = true; 
     } 

    }