如何处理检查和取消android中动态创建复选框 [英] How to handle check and uncheck dynamically created checkbox in android

问题描述

我已经用循环复选框，我想验证它。就像我刚才想只有3从复选框，当我在$ 4一个p $ PSS检查它应该显示一个警告，并取消它。

，我能够得到警报，当我preSS的4the之一，但它不是取消选中。

任何人都面临这样的问题，你是如何解决的？

解决方案

  INT I;
对于（I = 0; I＆小于20;我++）{
    复选框CH =新的复选框（本）;
    ch.setTag（Integer.valueOf（i）段）;
    ch.setText（复选框+ I）;
    ch.setChecked（假）;
    ch.setOnCheckedChangeListener（新OnCheckedChangeListener（）{
        @覆盖
        公共无效onCheckedChanged（CompoundButton buttonView，布尔器isChecked）{
            如果（器isChecked）{
                numChecked ++;
            }其他{
                numChecked--;
            }            如果（numChecked == 4）{
                buttonView.setChecked（假）;
                numChecked--;
                //第四个选择，显示你的对话
            }
        }
    }）;
}
 

您还需要一个全局变量调用numChecked：

  INT numChecked = 0;
 

您还需要在循环的结束复选框添加到您的布局添加.addView（CH）。

i have created check boxes using loop and i want to validate it. Like i just want to check only 3 from the check boxes , when i press on the 4th one it should show an alert and uncheck it.

And i am able to get the alert when i press the 4the one but it is not unchecking.

anybody faced such issue and how did you solve it ?

解决方案

int i;
for (i = 0; i < 20; i++) {
    CheckBox ch = new CheckBox(this);
    ch.setTag(Integer.valueOf(i));
    ch.setText("CheckBox " + i);
    ch.setChecked(false);
    ch.setOnCheckedChangeListener(new OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
            if (isChecked) {
                numChecked++;
            } else {
                numChecked--;
            }

            if (numChecked == 4) {
                buttonView.setChecked(false);
                numChecked--;
                // fourth one selected, show your dialog
            }
        }
    });
}

You will also need a global variable call numChecked:

int numChecked = 0;

You will also need to add a .addView(ch) in the loop's end to add the CheckBoxes to your layout.

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