私たちは、私が使用しています私のアプリケーションでは、別のアクティビティ

Question

に行くと配列データをリフレッシュする方法Z画像としてアルファベットとになってドラッグし、dropped.Iは問題array.Andでこれらの画像を保存しています戻るボタンをクリックするか、戻るボタンを押すと前のメニューに戻り、クリアボタンを押すと同じページにリダイレクトされ、最終的にはアルファベット画像が初期位置になります。 実際に私がクリアボタンを押したときに、同じ配列にイメージをオーバーライドすると、配列サイズが26にすぎないので、ArrayIndexOutOfBoundExceptionを取得しています。そのアクティビティがナビゲートされる前に、このビューが次に開かれると、アレイデータが新たに初期化されるように、別の画面に表示されます。

私は宣言して配列を定義したクラス1と上記のクラスビューにアクセスしている別のクラスを提供しています。また、別のアクティビティonClickに移動するボタンがあります。

DrawViewクラス：

public class DrawView extends View { 
    public ColorBall[] colorballs = new ColorBall[26]; // array that holds the balls 
    public int balID = 0; // variable to know what ball is being dragged 

    public DrawView(Context context) { 
     super(context); 
     setFocusable(true); //necessary for getting the touch events 

     // setting the start point for the balls 
     Point point1 = new Point(); 
     point1.x = 50; 
     point1.y = 0; 
     Point point2 = new Point(); 
     point2.x = 150; 
     point2.y = 0; 
     Point point3 = new Point(); 
     point3.x = 250; 
     point3.y = 0; 
     Point point4 = new Point(); 
     point4.x = 350; 
     point4.y = 0; 
     Point point5 = new Point(); 
     point5.x = 400; 
     point5.y = 0; 
     Point point6 = new Point(); 
     point6.x = 50; 
     point6.y = 50; 
     Point point7 = new Point(); 
     point7.x = 150; 
     point7.y =50; 
     Point point8 = new Point(); 
     point8.x = 250; 
     point8.y = 50; 
     Point point9 = new Point(); 
     point9.x = 350; 
     point9.y = 50; 
     Point point10 = new Point(); 
     point10.x = 400; 
     point10.y = 50; 
     Point point11 = new Point(); 
     point11.x = 50; 
     point11.y = 100; 
     Point point12 = new Point(); 
     point12.x = 150; 
     point12.y = 100; 
     Point point13 = new Point(); 
     point13.x = 250; 
     point13.y = 100; 
     Point point14 = new Point(); 
     point14.x = 350; 
     point14.y = 100; 
     Point point15 = new Point(); 
     point15.x = 400; 
     point15.y = 100; 
     Point point16 = new Point(); 
     point16.x = 50; 
     point16.y = 150; 
     Point point17 = new Point(); 
     point17.x = 150; 
     point17.y = 150; 
     Point point18 = new Point(); 
     point18.x = 250; 
     point18.y = 150; 
     Point point19 = new Point(); 
     point19.x = 350; 
     point19.y = 150; 
     Point point20 = new Point(); 
     point20.x = 400; 
     point20.y = 150; 
     Point point21 = new Point(); 
     point21.x = 50; 
     point21.y = 200; 
     Point point22 = new Point(); 
     point22.x = 150; 
     point22.y = 200; 
     Point point23 = new Point(); 
     point23.x = 250; 
     point23.y = 200; 
     Point point24 = new Point(); 
     point24.x = 350; 
     point24.y = 200; 
     Point point25 = new Point(); 
     point25.x = 400; 
     point25.y = 200; 
     Point point26 = new Point(); 
     point26.x = 200; 
     point26.y = 250; 
     // declare each ball with the ColorBall class 
     colorballs[0] = new ColorBall(context,R.drawable.e, point1); 
     colorballs[1] = new ColorBall(context,R.drawable.l, point2); 
     colorballs[2] = new ColorBall(context,R.drawable.z, point3); 
     colorballs[3] = new ColorBall(context,R.drawable.h, point4); 
     colorballs[4] = new ColorBall(context,R.drawable.a, point5); 
     colorballs[5] = new ColorBall(context,R.drawable.c, point6); 
     colorballs[6] = new ColorBall(context,R.drawable.y, point7); 
     colorballs[7] = new ColorBall(context,R.drawable.s, point8); 
     colorballs[8] = new ColorBall(context,R.drawable.b2, point9); 
     colorballs[9] = new ColorBall(context,R.drawable.o, point10); 
     colorballs[10] = new ColorBall(context,R.drawable.n, point11); 
     colorballs[11] = new ColorBall(context,R.drawable.v, point12); 
     colorballs[12] = new ColorBall(context,R.drawable.i, point13); 
     colorballs[13] = new ColorBall(context,R.drawable.x, point14); 
     colorballs[14] = new ColorBall(context,R.drawable.f, point15); 
     colorballs[15] = new ColorBall(context,R.drawable.j, point16); 
     colorballs[16] = new ColorBall(context,R.drawable.t, point17); 
     colorballs[17] = new ColorBall(context,R.drawable.q, point18); 
     colorballs[18] = new ColorBall(context,R.drawable.w, point19); 
     colorballs[19] = new ColorBall(context,R.drawable.u, point20); 
     colorballs[20] = new ColorBall(context,R.drawable.k, point21); 
     colorballs[21] = new ColorBall(context,R.drawable.r, point22); 
     colorballs[22] = new ColorBall(context,R.drawable.p, point23); 
     colorballs[23] = new ColorBall(context,R.drawable.d, point24); 
     colorballs[24] = new ColorBall(context,R.drawable.m, point25); 
     colorballs[25] = new ColorBall(context,R.drawable.g, point26); 

    } 

    // the method that draws the balls 
    @Override protected void onDraw(Canvas canvas) { 
     //canvas.drawColor(0xFFCCCCCC);  //if you want another background color  

     //draw the balls on the canvas 
     for (ColorBall ball : colorballs) { 
      canvas.drawBitmap(ball.getBitmap(), ball.getX(), ball.getY(), null); 
      } 

    } 

    // events when touching the screen 
    public boolean onTouchEvent(MotionEvent event) { 
     int eventaction = event.getAction(); 

     int X = (int)event.getX(); 
     int Y = (int)event.getY(); 

     switch (eventaction) { 

     case MotionEvent.ACTION_DOWN: // touch down so check if the finger is on a ball 
      balID = 0; 
      for (ColorBall ball : colorballs) { 
       // check if inside the bounds of the ball (circle) 
       // get the center for the ball 
       int centerX = ball.getX() + 25; 
       int centerY = ball.getY() + 25; 

       // calculate the radius from the touch to the center of the ball 
       double radCircle = Math.sqrt((double) (((centerX-X)*(centerX-X)) + (centerY-Y)*(centerY-Y))); 

       // if the radius is smaller then 23 (radius of a ball is 22), then it must be on the ball 
       if (radCircle < 23){ 
        balID = ball.getID(); 
        break; 
       } 

       // check all the bounds of the ball (square) 
       //if (X > ball.getX() && X < ball.getX()+50 && Y > ball.getY() && Y < ball.getY()+50){ 
       // balID = ball.getID(); 
       // break; 
       //} 
       } 

      break; 


     case MotionEvent.ACTION_MOVE: // touch drag with the ball 
      // move the balls the same as the finger 
      if (balID > 0) { 
       colorballs[balID-1].setX(X-25); 
       colorballs[balID-1].setY(Y-25); 
      } 

      break; 

     case MotionEvent.ACTION_UP: 
      // touch drop - just do things here after dropping 

      break; 
     } 
     // redraw the canvas 
     invalidate(); 
     return true; 

    } 

} 

クラスQuiz1：

public class Quiz1 extends Activity{ 
    LinearLayout lLayout; 
    TextView tView; 
    DrawView d; 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.e); 
     ImageView v=(ImageView)findViewById(R.id.imageView1); 
     v.setScaleType(ImageView.ScaleType.FIT_XY); 
     ImageView v1=(ImageView)findViewById(R.id.imageView2); 
     v1.setAlpha(60); 

     ImageButton i3=(ImageButton)findViewById(R.id.imageButton3); 
     i3.setOnClickListener(new OnClickListener(){ 

      public void onClick(View v) { 
       // TODO Auto-generated method stub 

       Toast.makeText(getApplicationContext(), "'Home.'", Toast.LENGTH_SHORT).show(); 
Intent i=new Intent(Quiz1.this,LiamaLearningActivity.class); 
startActivity(i); 
      } 
}); 
     ImageButton i2=(ImageButton)findViewById(R.id.imageButton2); 
      i2.setOnClickListener(new OnClickListener(){ 

       public void onClick(View v) { 
        // TODO Auto-generated method stub 

        Toast.makeText(getApplicationContext(), "'Cleared.'", Toast.LENGTH_SHORT).show(); 
    Intent i=new Intent(Quiz1.this,Quiz1.class); 
    startActivity(i); 
       }}); 

      ImageButton i1=(ImageButton)findViewById(R.id.imageButton1); 
      i1.setOnClickListener(new OnClickListener(){ 

       public void onClick(View v) { 
        // TODO Auto-generated method stub 

        Toast.makeText(getApplicationContext(), "'Sample Quizzes.'", Toast.LENGTH_SHORT).show(); 
    Intent i=new Intent(Quiz1.this,Quiz.class); 
    startActivity(i); 
       }}); 
     lLayout = new LinearLayout(this); 
     lLayout.setOrientation(LinearLayout.VERTICAL); 
     //-1(LayoutParams.MATCH_PARENT) is fill_parent or match_parent since API level 8 
     //-2(LayoutParams.WRAP_CONTENT) is wrap_content 
     lLayout.setLayoutParams(new LayoutParams(
LayoutParams.MATCH_PARENT, 
LayoutParams.MATCH_PARENT)); 
     /* tView = new TextView(this); 
     tView.setText("Hello, This is a view created programmatically! " + 
        "You CANNOT change me that easily :-)"); 
     tView.setLayoutParams(new LayoutParams(
LayoutParams.MATCH_PARENT, 
LayoutParams.WRAP_CONTENT)); 
     lLayout.addView(tView);*/ 
     d=new DrawView(this); 
     d.setLayoutParams(new LayoutParams(
       LayoutParams.MATCH_PARENT, 700)); 
     lLayout.addView(d); 
     AbsoluteLayout abs=(AbsoluteLayout)findViewById(R.id.a1); 
     abs.addView(lLayout); 
     //setContentView(lLayout); 

    super.onDestroy(); 
    } 
} 

Logcat：あなたがしたい場合は[戻る]ボタンをクリックした時に

12-06 16:29:45.564: E/AndroidRuntime(278): java.lang.ArrayIndexOutOfBoundsException 
12-06 16:29:45.564: E/AndroidRuntime(278): at com.avigma.learning.DrawView.onTouchEvent(DrawView.java:176) 
12-06 16:29:45.564: E/AndroidRuntime(278): at android.view.View.dispatchTouchEvent(View.java:3766) 
12-06 16:29:45.564: E/AndroidRuntime(278): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:936) 
12-06 16:29:45.564: E/AndroidRuntime(278): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:936) 
12-06 16:29:45.564: E/AndroidRuntime(278): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:936) 
12-06 16:29:45.564: E/AndroidRuntime(278): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:936) 
12-06 16:29:45.564: E/AndroidRuntime(278): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:936) 
12-06 16:29:45.564: E/AndroidRuntime(278): at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:1671) 
12-06 16:29:45.564: E/AndroidRuntime(278): at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1107) 
12-06 16:29:45.564: E/AndroidRuntime(278): at android.app.Activity.dispatchTouchEvent(Activity.java:2086) 
12-06 16:29:45.564: E/AndroidRuntime(278): at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:1655) 
12-06 16:29:45.564: E/AndroidRuntime(278): at android.view.ViewRoot.handleMessage(ViewRoot.java:1785) 
12-06 16:29:45.564: E/AndroidRuntime(278): at android.os.Handler.dispatchMessage(Handler.java:99) 
12-06 16:29:45.564: E/AndroidRuntime(278): at android.os.Looper.loop(Looper.java:123) 
12-06 16:29:45.564: E/AndroidRuntime(278): at android.app.ActivityThread.main(ActivityThread.java:4627) 
12-06 16:29:45.564: E/AndroidRuntime(278): at java.lang.reflect.Method.invokeNative(Native Method) 
12-06 16:29:45.564: E/AndroidRuntime(278): at java.lang.reflect.Method.invoke(Method.java:521) 
12-06 16:29:45.564: E/AndroidRuntime(278): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868) 
12-06 16:29:45.564: E/AndroidRuntime(278): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) 
12-06 16:29:45.564: E/AndroidRuntime(278): at dalvik.system.NativeStart.main(Native Method) 

Answer 1

だけの仕上げ（）メソッドを呼び出します新しいアクティビティを開始し、現在のアクティビティを終了し、以前のアクティビティに戻る私たちのメニュー

Answer 2

私は実際に私の答えを得たColorballクラスは匿名でカウントを増分していたので、カウントがnoより大きい場合、そのクラスに制約を追加しました。画像の私は再びここ数= 1

を初期化私の場合には26、つまり配列に示す午前コードです： -

public ColorBall(Context context, int drawable, Point point) { 

    BitmapFactory.Options opts = new BitmapFactory.Options(); 
opts.inJustDecodeBounds = true; 
img = BitmapFactory.decodeResource(context.getResources(), drawable); 
if (count > 26) count=1; 
id=count; 
    count++; 
    coordX= point.x; 
    coordY = point.y; 

}