Question

我有一个GridView，我已经放了一个复选框和imageview。问题是，当我选中此复选框并向下滚动时，checBox将被取消选中。虽然uncheck事件未被触发，但它看起来未经检查。我没有在复选框中应用任何样式。可能是什么原因？我该如何解决这个问题。

 holder.chckbx.setOnCheckedChangeListener(new OnCheckedChangeListener() {
                        @Override
                        public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {


                            if(isChecked){
                                     Log.e("checked","checked");
                                }
                                else{
                                     Log.e("unchecked","unchecked");
                                }
                        }
                    });

Answer 1

https://groups.google.com/forum/?fromgroups#!topic/android-developers/No0LrgJ6q2M

在上面的链接中使用romain guy的listview解决方案。

您的自定义适配器必须实施CompoundButton.OnCheckedChangeListener并使用SparseBooleanArray

然后

 holder.chckbx.setOnCheckedChangeListener(this);

然后

     public boolean isChecked(int position) {
        return mCheckStates.get(position, false);
    }

    public void setChecked(int position, boolean isChecked) {
        mCheckStates.put(position, isChecked);

    }

    public void toggle(int position) {
        setChecked(position, !isChecked(position));
    }
@Override
public void onCheckedChanged(CompoundButton buttonView,
        boolean isChecked) {
     mCheckStates.put((Integer) buttonView.getTag(), isChecked);    

}

实施例

public class MainActivity extends Activity implements
AdapterView.OnItemClickListener {
    int count;
private CheckBoxAdapter mCheckBoxAdapter;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    final GridView gridView = (GridView) findViewById(R.id.lv);
    gridView.setTextFilterEnabled(true);
    gridView.setOnItemClickListener(this);
    mCheckBoxAdapter = new CheckBoxAdapter(this);
           gridView.setAdapter(mCheckBoxAdapter);

   }

public void onItemClick(AdapterView parent, View view, int
position, long id) {
    mCheckBoxAdapter.toggle(position);
}

class CheckBoxAdapter extends ArrayAdapter implements CompoundButton.OnCheckedChangeListener
{  private SparseBooleanArray mCheckStates;
   LayoutInflater mInflater;
    ImageView imageview1,imageview;
    CheckBox cb;

    CheckBoxAdapter(MainActivity context)
    {
        super(context,0);
        mCheckStates = new SparseBooleanArray(10);
        mInflater = (LayoutInflater)MainActivity.this.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

    }
    @Override
    public int getCount() {
        // TODO Auto-generated method stub
        return 10;
    }

    @Override
    public Object getItem(int position) {
        // TODO Auto-generated method stub
        return position;
    }

    @Override
    public long getItemId(int position) {
        // TODO Auto-generated method stub

        return 0;
    }

    @Override
    public View getView(final int position, View convertView, ViewGroup parent) {
        // TODO Auto-generated method stub
        View vi=convertView;
        if(convertView==null)
         vi = mInflater.inflate(R.layout.checkbox, null); 
         imageview= (ImageView) vi.findViewById(R.id.textView1);

         cb = (CheckBox) vi.findViewById(R.id.checkBox1);

         cb.setTag(position);
         cb.setChecked(mCheckStates.get(position, false));
        cb.setOnCheckedChangeListener(this);
        return vi;
    }
     public boolean isChecked(int position) {
            return mCheckStates.get(position, false);
        }

        public void setChecked(int position, boolean isChecked) {
            mCheckStates.put(position, isChecked);

        }

        public void toggle(int position) {
            setChecked(position, !isChecked(position));
        }
    @Override
    public void onCheckedChanged(CompoundButton buttonView,
            boolean isChecked) {
        // TODO Auto-generated method stub
         mCheckStates.put((Integer) buttonView.getTag(), isChecked);    

    }

}

}

activity_main.xml中

<RelativeLayout
     xmlns:android="http://schemas.android.com/apk/res/android" 
     android:layout_width="fill_parent" 
     android:layout_height="fill_parent">
     <GridView
     android:id="@+id/lv"
     android:layout_width="wrap_content"
     android:numColumns="2"
      android:layout_height="wrap_content"
      />

    </RelativeLayout>

checkbox.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <ImageView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:layout_marginLeft="15dp"
        android:layout_marginTop="34dp"
        android:src="@drawable/ic_launcher"/>

    <CheckBox
        android:id="@+id/checkBox1"
        android:focusable="false"
        android:focusableInTouchMode="false"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentRight="true"
        android:layout_below="@+id/textView1"
        android:layout_marginRight="22dp"
        android:layout_marginTop="23dp" />

</RelativeLayout>

类似于这里回答的那个。而不是listview使用gridview。

How to change the text of a CheckBox in listview?

Answer 2

我遇到了同样的问题并找到了解决方案。希望我节省几分钟的调试时间

问题是，当我选中此复选框并向下滚动时，checBox将被取消选中。虽然uncheck事件未被触发，但它看起来没有被检查。

setOnCheckedChangeListener是错误的侦听器。当gridView中的项目被回收时，checkBox会自动重置，因此会错误地取消选中事件。

解决方案：改为使用OnClickListener

在向上和向下滚动gridview时，取消选中gridview复选框

2 个答案: