生成按鈕上的隨機整數點擊沒有刷新活動

Question

嘿大家:)我一直在撓我的頭，這似乎找不到合適的答案，即使我確定它的一個簡單的問題。

我有一個程序，當另一個按鈕被按下時，它會在一組按鈕上生成隨機字母文本。 當我打開應用程序時，它加載正常，第一次按下按鈕時它會正確生成，但在此之後，我似乎無法讓它重新生成隨機字母。

我可以通過添加Intent來完成我想要的操作，並且基本上「刷新」（主題活動不確定），但是我想爲按鈕點擊添加一個計數器，並且在活動執行時重置。

{Intent intent = new Intent(MainActivity.this,  MainActivity.class); 
    startActivity(intent); 
     finish(); 
     overridePendingTransition(0, 0); 

我只是似乎不能繞我的腦海圍繞如何做到這一點，否則。這似乎是我需要每次點擊按鈕時重新運行java。有什麼建議麼？

下面是一些代碼，我使用的是按鈕而不是textview，因爲我a）想設置一個簡單的背景b）可能會讓它們稍後可點擊。非常感謝！

public class MainActivity extends Activity 
{ 

    Button spin; 
    Button reel1,reel2,reel3,reel4; 
    private String rnd,rnd2,rnd3,rnd4; 

    int count1=50; 

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


    private static String rndm[] = {"A","B","C","D"}; 
    {rnd = rndm[(int) (Math.random() * rndm.length)];} 
    private static String rndm2[] = {"A","B","C","D"}; 
    {rnd2 = rndm2[(int) (Math.random() * rndm2.length)];} 
    private static String rndm3[] = {"A","B","C","D"}; 
    {rnd3 = rndm3[(int) (Math.random() * rndm3.length)];} 
    private static String rndm4[] = {"A","B","C","D"}; 
    {rnd4 = rndm4[(int) (Math.random() * rndm4.length)];} 

    public void perform_action(View v){} 

    public void addListenerOnButton() { 


     spin = (Button) findViewById(R.id.spin); 
     spin.setOnClickListener(new OnClickListener() { 

       @Override 
       public void onClick(View v) { 

        {Toast.makeText(getApplicationContext(),"button pressed",  Toast.LENGTH_SHORT).show();} 


       {Button tv = (Button)  findViewById(R.id.reel1); 
        tv.setText(String.valueOf(rnd)); 
        tv.setTextColor(Color.parseColor("#000000"));} 

       {Button tv = (Button)  findViewById(R.id.reel2); 
        tv.setText(String.valueOf(rnd2)); 
        tv.setTextColor(Color.parseColor("#000000"));} 

       {Button tv = (Button)  findViewById(R.id.reel3); 
        tv.setText(String.valueOf(rnd3)); 
        tv.setTextColor(Color.parseColor("#000000"));} 

       {Button tv = (Button)  findViewById(R.id.reel4); 
        tv.setText(String.valueOf(rnd4)); 
        tv.setTextColor(Color.parseColor("#000000")); 

Answer 1

我想通了！ Whoot。但我無法贊成自己的正確答案。

public class MainActivity extends Activity 
{ 

    Button spin; 
    Button reel1,reel2,reel3,reel4; 
    private String rnd,rnd2,rnd3,rnd4; 

    int count1=50; 

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

    public void perform_action(View v){} 

    public void addListenerOnButton() { 


     spin = (Button) findViewById(R.id.spin); 
     spin.setOnClickListener(new OnClickListener() { 

       @Override 
      public void onClick(View v) { 



       String rndm[] = {"A","B","C","D"}; 
       {rnd = rndm[(int) (Math.random() *  rndm.length)];} 
       String rndm2[] = {"A","B","C","D"}; 
       {rnd2 = rndm2[(int) (Math.random() *  rndm2.length)];} 
       String rndm3[] = {"A","B","C","D"}; 
       {rnd3 = rndm3[(int) (Math.random() *  rndm3.length)];} 
       String rndm4[] = {"A","B","C","D"}; 
       {rnd4 = rndm4[(int) (Math.random() *  rndm4.length)];} 


        {Toast.makeText(getApplicationContext(),"button pressed",  Toast.LENGTH_SHORT).show();} 


       {Button tv = (Button)  findViewById(R.id.reel1); 
        tv.setText(String.valueOf(rnd)); 
        tv.setTextColor(Color.parseColor("#000000"));} 

       {Button tv = (Button)  findViewById(R.id.reel2); 
        tv.setText(String.valueOf(rnd2)); 
        tv.setTextColor(Color.parseColor("#000000"));} 

       {Button tv = (Button)  findViewById(R.id.reel3); 
        tv.setText(String.valueOf(rnd3)); 
        tv.setTextColor(Color.parseColor("#000000"));} 

       {Button tv = (Button)  findViewById(R.id.reel4); 
        tv.setText(String.valueOf(rnd4)); 
        tv.setTextColor(Color.parseColor("#000000")); 

我將我的隨機字符串移到我的Onclick事件中，並刪除了私有和靜態部分。然後whala！事情就像一個魅力！