android studio中的循序動畫，循環

Question

我在android編程中很新穎，我正在嘗試做一個簡單的遊戲。我想要有3個方格，並且在開始按鈕上我想生成一些隨機數並旋轉其中一個正方形。我在循環中這樣做，因爲我的隨機數的數量不固定。

package com.example.smartpc.memorygame; 

import android.graphics.drawable.TransitionDrawable; 
import android.support.v7.app.AppCompatActivity; 
import android.os.Bundle; 
import android.view.View; 
import android.view.animation.Animation; 
import android.view.animation.AnimationSet; 
import android.view.animation.RotateAnimation; 
import android.widget.Button; 
import android.widget.ImageView; 

import java.util.ArrayList; 
import java.util.Random; 
import java.util.Timer; 
import java.util.TimerTask; 

public class MemoryGame extends AppCompatActivity { 

    ImageView imgRed; 
    ImageView imgGreen; 
    ImageView imgBlue; 
    Button btnStart; 

    ArrayList<Integer>array=new ArrayList<>(); 
    int brojac=3; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_memory_game); 

     imgRed=(ImageView)findViewById(R.id.imgRed); 
     imgGreen=(ImageView)findViewById(R.id.imgGreen); 
     imgBlue=(ImageView)findViewById(R.id.imgBlue); 
     btnStart=(Button)findViewById(R.id.btnStart); 

     final RotateAnimation animation=new RotateAnimation(0f,360f, RotateAnimation.RELATIVE_TO_SELF,0.5f, 
                  RotateAnimation.RELATIVE_TO_SELF,0.5f); 
     animation.setDuration(1000); 

     imgRed.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       imgRed.startAnimation(animation); 
      } 
     }); 

     imgGreen.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       imgGreen.startAnimation(animation); 
      } 
     }); 

     imgBlue.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       imgBlue.startAnimation(animation); 
      } 
     }); 

     btnStart.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       for(int i=0;i<brojac;i++) { 
        Random rand = new Random(); 
        int number = rand.nextInt() % 3; 
        if (number == 1) { 
         imgRed.startAnimation(animation); 
        } 
        else if (number == 2) { 
         imgGreen.startAnimation(animation); 
        } 
        else { 
         imgBlue.startAnimation(animation); 
        } 
       } 

      } 
     }); 
    } 
} 

我需要等到一個動畫完成，然後我需要啓動另一個循環迭代。有沒有人有想法如何做到這一點？謝謝！

Answer 1

在btnStart單擊創建唯一的隨機數，並根據所啓動的動畫

btnStart.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) 
     { 

      Random rand = new Random(); 
      int number = rand.nextInt() % 3; 
      if (number == 1) { 
       imgRed.startAnimation(animation); 
      } 
      else if (number == 2) { 
       imgGreen.startAnimation(animation); 
      } 
      else { 
       imgBlue.startAnimation(animation); 
      } 
     } 
    }); 

在setAnimationListener當動畫結束，然後再創建隨機數，取決於開始動畫

final RotateAnimation animation=new RotateAnimation(0f,360f, RotateAnimation.RELATIVE_TO_SELF,0.5f, 
     RotateAnimation.RELATIVE_TO_SELF,0.5f); 
    animation.setDuration(1000); 

    animation.setAnimationListener(new Animation.AnimationListener() { 
     @Override 
     public void onAnimationStart(Animation animation) { 

     } 

     @Override 
     public void onAnimationEnd(Animation animation) { 
      Random rand = new Random(); 
      int number = rand.nextInt() % 3; 
      if (number == 1) { 
       imgRed.startAnimation(animation); 
      } 
      else if (number == 2) { 
       imgGreen.startAnimation(animation); 
      } 
      else { 
       imgBlue.startAnimation(animation); 
      } 

     } 

     @Override 
     public void onAnimationRepeat(Animation animation) { 

     } 
    });