Question

我有一个包含12个整数值的数组，我想一个接一个地显示它，如

最初在应用程序运行时，我显示6个值。

单击按钮上的

我想逐个显示其他6个值

prevbutton-＆GT; value1 value2 value3 value4 value5 value6 - ＆gt ; Next按钮

所以在下一个按钮上点击它应该是这样的。

接下来的6个值应该像这样显示

prevbutton - ＆GT; value2 value3 value4 value5 value6 value7 - ＆gt ;的 Next按钮

这应该持续到12个值

并且在上游按钮时会发生反转。

总是感谢帮助，谢谢

我正在显示前6个这样的值

     public void autoTune() {
    Log.i("autotune", " called");

    if (frequency[0] == 0.0)
        station1.setText("");
    else
        station1.setText("" + frequency[0]);
    if (frequency[1] == 0.0)
        station2.setText("");
    else
        station2.setText("" + frequency[1]);
    if (frequency[2] == 0.0)
        station3.setText("");
    else
        station3.setText("" + frequency[2]);
    if (frequency[3] == 0.0)
        station4.setText("");
    else
        station4.setText("" + frequency[3]);
    if (frequency[4] == 0.0)
        station5.setText("");
    else
        station5.setText("" + frequency[4]);
    if (frequency[5] == 0.0)
        station6.setText("");
    else
        station6.setText("" + frequency[5]);

}



    @Override
    protected Boolean doInBackground(Context... params) {
        // TODO Auto-generated method stub
        Log.i("in autotune", " before freq length");
        int[] freq = { 911, 943, 947, 932, 901, 964, 843, 835, 946,904,908,873,877 };
        freqCounter = 0;
        Log.i("in autotune", "after freq length : " + freq.length);
        frequency = new double[freq.length];
        Log.i("in autotune", "after frequency length : " + frequency.length);
        for (int k = 0; k < freq.length; k++) {
            Log.i("In Radio.java", "Freq : " + freq[k]);
            frequency[k] = freq[k];
            frequency[k] = frequency[k] / 10;
            if (frequency[k] == 0.0)
                break;
            freqCounter++;
            Log.i("In Radio.java", "Frequency : " + frequency[k]);
        }

我已尝试使用此代码，但这根本不起作用

  public void forwardtune(){
Button[] buttons = new Button[5];
buttons[0] = (Button)findViewById(R.id.radiostation1);
buttons[1] = (Button)findViewById(R.id.radiostation2);
buttons[2] = (Button)findViewById(R.id.radiostation3);
buttons[3] = (Button)findViewById(R.id.radiostation4);
buttons[4] = (Button)findViewById(R.id.radiostation5);
buttons[5] = (Button)findViewById(R.id.radiostation6);
if(currentlyDisplayingFromPosition + 6 >= arraySize)
       return;

   for(int i=0; i<arraySize; i++){
       buttons[i].setText("");
   }
   for(int i=currentlyDisplayingFromPosition; i<=currentlyDisplayingFromPosition+6; i++){
       if (frequency[i] == 0.0)
           buttons[i].setText("");
        else
            buttons[i].setText("" + frequency[0]);
   }
  }

我在下一个按钮点击中调用此函数forwardtune（）。还是没有运气！有什么建议吗？

Answer 1

你可以试试这个。

int currentlyDisplayingFromPosition = 0;
int arraySize = 12;

public void forwardTune(){
   if(currentlyDisplayingFromPosition + 6 >= arraySize)
       return;

   for(int i=0; i<arraySize; i++){
       textView[i].setText("");
   }
   for(int i=currentlyDisplayingFromPosition; i<=currentlyDisplayingFromPosition+6; i++){
       if (frequency[i] == 0.0)
            textView[i].setText("");
        else
            textView[i].setText("" + frequency[0]);
   }

}

类似地，您也可以通过反转上面的代码来尝试使用backwardTune（）。

Android：根据按钮单击显示一个接一个的值数组

1 个答案: