我想构建一个自定义数组适配器，每个列表项中都有两个复选框。当一个复选框被点击时，我想取消选中其他复选框，如果它被选中。所以，既不选中复选框，或只是其中之一。列表项中的多个复选框android

我认为我遇到的问题是我不清楚如何引用onClickListener中的其他复选框。这里是我的代码迄今：

public class PetWalkerAdapter extends ArrayAdapter{

protected Context mContext;

protected List mPets;

public PetWalkerAdapter(Context context, List pets) {

super(context, R.layout.pet_walker_item, pets);

mContext = context;

mPets = pets;

}

@Override

public View getView(int position, View convertView, ViewGroup parent) {

ViewHolder holder;

if (convertView == null) {

convertView = LayoutInflater.from(mContext).inflate(R.layout.pet_walker_item, null);

holder = new ViewHolder();

holder.petPictureView = (ImageView) convertView.findViewById(R.id.petPicture);

holder.petNameLabel = (TextView) convertView.findViewById(R.id.petNameLabel);

holder.ownerCheckBox = (CheckBox) convertView.findViewById(R.id.ownerCheckBox);

holder.walkerCheckBox = (CheckBox) convertView.findViewById(R.id.walkerCheckBox);

convertView.setTag(holder);

// If owner check is toggled, uncheck walker

holder.ownerCheckBox.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View view) {

CheckBox cb = (CheckBox) view;

ViewHolder petHolder = (ViewHolder) cb.getTag();

// Here's where the app crashes,

if (petHolder.walkerCheckBox.isChecked()) {

petHolder.walkerCheckBox.setChecked(false);

}

}

});

}

else {

holder = (ViewHolder)convertView.getTag();

}

ParseObject pet = mPets.get(position);

holder.petNameLabel.setText(pet.getString(ParseConstants.KEY_PET_NAME));

return convertView;

}

private static class ViewHolder {

ImageView petPictureView;

TextView petNameLabel;

CheckBox ownerCheckBox;

CheckBox walkerCheckBox;

}

public void refill(List pets) {

mPets.clear();

mPets.addAll(pets);

notifyDataSetChanged();

}

}

这里的logcat的

10-02 01:53:16.412 1270-1270/com.base8.wlkr E/AndroidRuntime﹕ FATAL EXCEPTION: main

Process: com.base8.wlkr, PID: 1270

java.lang.NullPointerException

at com.base8.wlkr.adapters.PetWalkerAdapter$1.onClick(PetWalkerAdapter.java:50)

at android.view.View.performClick(View.java:4438)

at android.widget.CompoundButton.performClick(CompoundButton.java:100)

at android.view.View$PerformClick.run(View.java:18422)

at android.os.Handler.handleCallback(Handler.java:733)

at android.os.Handler.dispatchMessage(Handler.java:95)

at android.os.Looper.loop(Looper.java:136)

at android.app.ActivityThread.main(ActivityThread.java:5017)

at java.lang.reflect.Method.invokeNative(Native Method)

at java.lang.reflect.Method.invoke(Method.java:515)

at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)

at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)

at dalvik.system.NativeStart.main(Native Method)

请让我知道如果你需要任何更多的信息。任何批评或引用赞赏。感谢您的期待。

2014-09-29

backlunp

+0

请把崩溃的logcat。 –

2014-09-29 21:49:05

+0

你考虑过单选按钮吗？ –

2014-09-29 21:53:55

+0

@AndrewMedico我没有想过单选按钮，我的目标是循环遍历列表，并查看用户在另一个片段中点击** Save **按钮时选中的选项(如果有的话)。如果我无法得到这个工作，我可能会考虑修改，谢谢你的建议！ –

2014-10-02 01:59:37