Question

我有一个Button add_Connection 拥有CheckBox动态创建的TableRow。

如果选中add_Connection，我想启用CheckBox，当我使用此代码Button启用禁用工作正常，但如果我检查cb1和cb2按钮启用如果我取消选中cb2并且仍然选择了cb1，则会禁用Button 点击完成后。

这里

cb: check box

add_connection: Button

 cb.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener()
                    {
                        @Override
                        public void onCheckedChanged(CompoundButton buttonView, boolean isChecked)
                        {
                              add_Connections.setEnabled(isChecked);
                        }
                    });

Answer 1

    import android.os.Bundle;
    import android.support.v7.app.AppCompatActivity;
    import android.util.Log;
    import android.widget.Button;
    import android.widget.CheckBox;
    import android.widget.CompoundButton;

    import java.util.ArrayList;

    public class MainActivity extends AppCompatActivity {

        CheckBox cb1;
        CheckBox cb2;
        CheckBox cb3;
        Button button;

        ArrayList<CheckBox> checkboxesList = new ArrayList<>();

        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            cb1 = (CheckBox) findViewById(R.id.cb1);
            cb2 = (CheckBox) findViewById(R.id.cb2);
            cb3 = (CheckBox) findViewById(R.id.cb3);
            button = (Button) findViewById(R.id.button);

            button.setEnabled(false);

            cb1.setTag("cb1");
            cb2.setTag("cb2");
            cb3.setTag("cb3");

            checkboxesList.add(cb1);
            checkboxesList.add(cb2);
            checkboxesList.add(cb3);

            CheckBoxListener listener = new CheckBoxListener(checkboxesList, button);

            for (CheckBox checkbox : checkboxesList) {
                checkbox.setOnCheckedChangeListener(listener);
            }
        }

        public static class CheckBoxListener implements CompoundButton.OnCheckedChangeListener {

            ArrayList<CheckBox> list;
            Button button;

            public CheckBoxListener(ArrayList<CheckBox> checkboxesList, Button btn) {
                list = checkboxesList;
                button = btn;
            }

            private boolean checkState() {
                for (CheckBox checkbox : list) {
                    if (checkbox.isChecked()) {
                        return true;
                    }
                }
                return false;
            }

            @Override
            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                button.setEnabled(checkState());
                Log.d("TAG", "Button is: " + checkState());
            }
        }
    }


and layout

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:orientation="vertical"
    tools:context="com.thomsonreuters.alexandrugoja.myapplication.MainActivity">

    <CheckBox
        android:id="@+id/cb1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

    <CheckBox
        android:id="@+id/cb2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

    <CheckBox
        android:id="@+id/cb3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

    <Button
        android:id="@+id/button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

</LinearLayout>

Android：如果选中TableRow中的复选框，则启用按钮

1 个答案: