问题描述
每当我选中的复选框在我的列表视图，其他随机复选框得到检查过。这可能是由于产品回收由列表视图。
我也试着设置机器人：可调焦=假在我的布局复选框在一些地方建议，但仍是onListItemClick（）不要求行时其复选框是checked.Only当我点击别的地方它被调用。
我要的是，只有用户选中的复选框应继续检查，直至用户取消选中它们。
我在下面提供的code这是完整的，可以直接运行。
whenever i check a checkbox in my listview , other random checkboxes get checked too . It could be due to item recycling by listview.
I also tried setting android:focusable="false" to checkbox in my layout as suggested in some places, but still the onListItemClick() is not called for a row when its checkbox is checked.Only when I click somewhere else it gets called.
What I want is that only the user-checked checkboxes should remain checked until the user unchecks them.
I give below the code which is complete and could be run directly.
C- ProjActivity.java活动$ C $：
Activity code- ProjActivity.java:
public class ProjActivity extends ListActivity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
PackageManager pm = getPackageManager();
List<ApplicationInfo> packages = pm.getInstalledApplications(PackageManager.GET_META_DATA);
final CopyOfMyCustomAdapter a = new CopyOfMyCustomAdapter(this, packages);
getListView().setAdapter(a);
}}
最后，自定义布局文件 - testlayout.xml
And finally, the custom layout file- testlayout.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal"
>
<CheckBox
android:id="@+id/checkBox1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="20dp"
android:text="CheckBox"
android:focusable="false"
/>
<ImageView
android:id="@+id/imageView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/ic_launcher"
android:focusable="false"
/>
更新：我在下面的答案的建议后CustomAdapter：
UPDATE : My CustomAdapter after the suggestion in an answer below:
public class MyCustomAdapter extends ArrayAdapter<ApplicationInfo> {
private List<ApplicationInfo> appInfoList;
private LayoutInflater mInflater;
private PackageManager pm;
ArrayList<Boolean> positionArray;
private Context ctx;
int[] visiblePosArray;
private volatile int positionCheck;
public MyCustomAdapter(Context context, List<ApplicationInfo> myList) {
super(context, NO_SELECTION);
appInfoList = myList;
ctx=context;
mInflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
pm = context.getPackageManager();
positionArray = new ArrayList<Boolean>(myList.size());
for(int i =0;i<myList.size();i++){
positionArray.add(false);
}
}
@Override
public int getCount() {
// TODO Auto-generated method stub
return appInfoList.size();
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
View row = convertView;
Holder holder = null;
if(row==null){
row = mInflater.inflate(R.layout.testlayout, null);
// visiblePosArray[position%visiblePosArray.length]=position;
holder = new Holder();
holder.appIcon = (ImageView)row.findViewById(R.id.imageView1);
holder.ckbox =(CheckBox)row.findViewById(R.id.checkBox1);
row.setTag(holder);
} else {
holder = (Holder) convertView.getTag();
}
holder.ckbox.setFocusable(false);
holder.appIcon.setImageDrawable(appInfoList.get(position).loadIcon(pm));
holder.ckbox.setChecked(positionArray.get(position));
holder.ckbox.setText(appInfoList.get(position).loadLabel(pm));
holder.ckbox.setOnCheckedChangeListener(new OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if(isChecked ){
System.out.println(position+"--- :)");
positionArray.add(position, true);
}else
positionArray.add(position, false);
}
});
return row;
}
static class Holder
{
ImageView appIcon;
CheckBox ckbox;
}
}
当我向上和向下滚动我可以看到随机指标变为真正的在我的布尔ArrayList中时syso他们。
When I scroll up and down I could see random indices changed to true in my boolean Arraylist when in syso them.
推荐答案
在一个列表视图回收的观点，它回收其连接到它present状态的以及的听众。在我的例子中，如果该复选框被选中，并具有onCheckedChangeListener组，既将保持基于位置再循环视图的一部分。所以这是我们的责任重置所有状态并删除previous听众。
所以，当我被取消选中循环来看，onCheckedChange监听器得到执行。一行制作的节目很好地工作。侦听器去除：
When a listview recycles views , it recycles its present state as well as listeners attached to it. In my example, if the checkbox was checked and has a onCheckedChangeListener set, both will remain a part of recycled view based on position. So it is our responsibility to reset all states and remove previous listeners.
So when I was unchecking the recycled view, the onCheckedChange listener was getting executed.one line made the program work perfectly. The listener was removed by :
holder.ckbox.setOnCheckedChangeListener(null);
下面是适配器的人谁可能偶然发现这一问题的工作code：
Below is the working code of Adapter for people who may stumble upon this problem:
public class MyCustomAdapter extends ArrayAdapter<ApplicationInfo> {
private List<ApplicationInfo> appInfoList;
private LayoutInflater mInflater;
private PackageManager pm;
ArrayList<Boolean> positionArray;
private Context ctx;
int[] visiblePosArray;
private volatile int positionCheck;
public MyCustomAdapter(Context context, List<ApplicationInfo> myList) {
super(context, NO_SELECTION);
appInfoList = myList;
ctx=context;
mInflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
pm = context.getPackageManager();
positionArray = new ArrayList<Boolean>(myList.size());
for(int i =0;i<myList.size();i++){
positionArray.add(false);
}
}
@Override
public int getCount() {
// TODO Auto-generated method stub
return appInfoList.size();
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
View row = convertView;
Holder holder = null;
if(row==null){
row = mInflater.inflate(R.layout.testlayout, null);
// visiblePosArray[position%visiblePosArray.length]=position;
holder = new Holder();
holder.appIcon = (ImageView)row.findViewById(R.id.imageView1);
holder.ckbox =(CheckBox)row.findViewById(R.id.checkBox1);
row.setTag(holder);
} else {
holder = (Holder) convertView.getTag();
holder.ckbox.setOnCheckedChangeListener(null);
}
holder.ckbox.setFocusable(false);
holder.appIcon.setImageDrawable(appInfoList.get(position).loadIcon(pm));
holder.ckbox.setChecked(positionArray.get(position));
holder.ckbox.setText(appInfoList.get(position).loadLabel(pm));
holder.ckbox.setOnCheckedChangeListener(new OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if(isChecked ){
System.out.println(position+"--- :)");
positionArray.set(position, true);
}else
positionArray.set(position, false);
}
});
return row;
}
static class Holder
{
ImageView appIcon;
CheckBox ckbox;
}
}
这篇关于检查列表视图中的复选框，使其他随机的复选框选中过的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！