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此代码以编程方式生成一个布局，该布局以数组中定义的方式由视图和 TextViews 组成。但是，我正在尝试使每个 TextView 都可点击，从而显示对该 TextView 更大解释的祝酒词。由于 toast 需要特定于特定的 TextView ，我试图在位置 i 使用另一个解释数组来设置 TextView 。但是，当我尝试执行此操作时，我收到错误“无法引用以不同方法定义的内部类中的非最终变量”。

所以我想知道，我该如何解决这个问题？i不能是最终的，因为它在每次循环迭代中都会发生变化？

for ( int i = 0; i < formulae.length; i++){
            if (formulae[i].equals("horizontalrule")){

                View rule = new View(FormulaeActivity.this);
                rule.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT, 2));
                rule.setBackgroundColor(0xFF000000);

                View spacerbig = new View(FormulaeActivity.this);
                spacerbig.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT, 20));
                spacerbig.setBackgroundResource(android.R.color.transparent);

                container.addView(rule);
                container.addView(spacerbig);
            }

        else{
            View spacersmall1 = new View(FormulaeActivity.this);
            spacersmall1.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT, 5));
            spacersmall1.setBackgroundResource(android.R.color.transparent);

            tx[i] = new TextView(FormulaeActivity.this);
            tx[i].setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT, 50));
            tx[i].setText(Html.fromHtml(formulae[i]));
            tx[i].setTextSize(20);
            tx[i].setPadding(10, 0, 0, 0);




            tx[1].setOnClickListener(new View.OnClickListener() {

                @Override
                public void onClick(View v) {
                    Toast.makeText(getApplicationContext(),   Html.fromHtml(explanations[i]), Toast.LENGTH_SHORT).show();
// ^this is the offending line


                }
            });


            container.addView(tx[i]);   
            container.addView(spacersmall1);
        }
4

2 回答 2

2

为什么没有一个最终变量来保存i每次迭代的值。

for ( int i = 0; i < formulae.length; i++){
    final int pos = i;

并像这样在onClick()

Toast.makeText(getApplicationContext(),   Html.fromHtml(explanations[pos])..
于 2013-03-27T08:34:14.540 回答
0

尝试这个，

for ( int i = 0; i < formulae.length; i++){
            if (formulae[i].equals("horizontalrule")){

                View rule = new View(FormulaeActivity.this);
                rule.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT, 2));
                rule.setBackgroundColor(0xFF000000);

                View spacerbig = new View(FormulaeActivity.this);
                spacerbig.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT, 20));
                spacerbig.setBackgroundResource(android.R.color.transparent);

                container.addView(rule);
                container.addView(spacerbig);
            }

        else{
            View spacersmall1 = new View(FormulaeActivity.this);
            spacersmall1.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT, 5));
            spacersmall1.setBackgroundResource(android.R.color.transparent);

            tx[i] = new TextView(FormulaeActivity.this);
            tx[i].setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT, 50));
            tx[i].setText(Html.fromHtml(formulae[i]));
            tx[i].setTextSize(20);
            tx[i].setPadding(10, 0, 0, 0);
            container.addView(tx[i]);   
            container.addView(spacersmall1);
        }
}


for(int i=0;i<tx.length;i++)
{
if(tx[i]!=null)
{
       tx[i].setOnClickListener(new View.OnClickListener() {

                @Override
                public void onClick(View v) {
                    Toast.makeText(getApplicationContext(),Html.fromHtml(explanations[i]), Toast.LENGTH_SHORT).show();
// ^this is the offending line
                }
            });
        }
}
于 2013-03-27T08:38:20.890 回答