Question

我有一个工作正常的警告对话框，但我怀疑我可以清理一些代码。我使用stringBuilder来帮助汇总消息，除了使用String.format来获取每行的空间。 String.format阻止我像平常一样追加。我宁愿不使用四（4）个字符串对象来完成所有这些。给我一个更简洁的编码，永远保持冷静。

AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
        builder.setCancelable(true);
        builder.setTitle("Total Counts");

        StringBuilder stringBuilder = new StringBuilder();

        String one= String.format("%-10s %s", calCount1, "#1 count\n");
        String two= String.format("%-10s %s", calCount2, "#2 count\n");
        String three= String.format("%-10s %s", calCount3, "#3 count\n");
        String four= String.format("%-10s %s", calCount4, "#4 count\n");

        stringBuilder.append(one);
        stringBuilder.append(two);
        stringBuilder.append(three);
        stringBuilder.append(four);

        builder.setMessage(stringBuilder.toString());
        ...

Answer 1

也许这就是。

AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
    builder.setCancelable(true);
    builder.setTitle("Total Counts");

    StringBuilder stringBuilder = new StringBuilder();

    stringBuilder.append(String.format("%-10s %s", calCount1, "#1 count\n"));
    stringBuilder.append(String.format("%-10s %s", calCount2, "#2 count\n"));
    stringBuilder.append(String.format("%-10s %s", calCount3, "#3 count\n"));
    stringBuilder.append(String.format("%-10s %s", calCount4, "#4 count\n"));

    builder.setMessage(stringBuilder.toString());

Answer 2

您可以在字符串资源中使用格式化占位符。请参阅＆＃34;格式化字符串＆＃34;部分下的this page。它应该像您一样使用标准格式修饰符。

将stringBuilder与String.format结合使用

2 个答案: