Custom Single choice ListView

问题

I want to make a custom List View having Two TextViews and a radio Button in a single row. And on listitem click the radio button state should be toggle. I cannot use Simple Adapter here.

I have already asked that question Single choice ListView custom Row Layout but don't find any satisfactory solution.

What I am currently doing is I am using simple_list_item_single_choice and putting data of both TextViews in a single one separated by some white spaces. But here it is getting worse (shown in the image below).

What I want is to fix the location of size and price and make list view as single choice.

XML Layout for the list can be something like:

**<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/layout"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:gravity="center_horizontal"
    android:orientation="horizontal" >

    <TextView
        android:id="@+id/tv_size"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="TextView"
        android:textSize="15sp"
        android:width="200dp" />

    <TextView
        android:id="@+id/tv_price"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="TextView"
        android:textSize="15sp"
        android:width="70dp" />

    <RadioButton
        android:id="@+id/radioButton"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

</LinearLayout>**

How to make custom adapter for that?

回答1:

I've been searching for an answer to this problem all morning, and the most useful thing I've found so far is this article.

While I haven't implemented the solution it suggests yet, it sounds like it's on the right track.

Basically, the single-choice ListView expects the widgets you provide it with to implement the Checkable interface. LinearLayout et al don't. So you need to create a custom layout that inherits LinearLayout (or whatever layout you want to use for your items) and implements the necessary interface.

回答2:

I had a similar situation but fixed that easily. Try this:

Extend ListActivity and set your custom list adapter

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    requestWindowFeature(Window.FEATURE_NO_TITLE); //if you need title to be hidden
    setContentView(R.layout.activity_add_to_cart_select_service_plan);
    setListAdapter(adapter);
}

Create a field to store selected index position in adapter
```
int selectedIndex = -1;
```

Provide an interface to it

public void setSelectedIndex(int index){
    selectedIndex = index;
}

Set the checked state to true or false based on the selected index inside getView()

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    RadioButton rbSelect = (RadioButton) convertView
                        .findViewById(R.id.radio1);
    if(selectedIndex == position){
    rbSelect.setChecked(true);
    }
    else{
    rbSelect.setChecked(false);
    }
}

Set radio button focusable and clickable attribs to 'false'

 <RadioButton
     android:id="@+id/radio1"
     android:checked="false"
     android:focusable="false"
     android:clickable="false"
 />

Set listview descendantFocusability attrib to 'beforeDescendants'

<ListView
    android:id="@android:id/list"
    android:choiceMode="singleChoice"
    android:descendantFocusability="beforeDescendants"
/>

Override onListItemClick

@Override
protected void onListItemClick(ListView l, View v, int position, long id) {
    super.onListItemClick(l, v, position, id);
    adapter.setSelectedIndex(position);
    adapter.notifyDataSetChanged();
}

That's it..run and check

回答3:

Handled a similar issue with a Hack (Not a perfect solution..but still works..)

 listview.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {




                for (int i = 0; i < parent.getCount() ; i ++)
                {

                    View v = parent.getChildAt(i);
                    RadioButton radio = (RadioButton) v.findViewById(R.id.radio);
                    radio.setChecked(false);

                }

                    RadioButton radio = (RadioButton) view.findViewById(R.id.radio);
                    radio.setChecked(true);



            }
        });

回答4:

<TextView
    android:id="@+id/tv_size"
    android:layout_width="200dp"
    android:layout_height="wrap_content"
    android:text="TextView"
    android:textSize="15sp"
    android:width="200dp" />

<TextView
    android:id="@+id/tv_price"
    android:layout_width="70dp"
    android:layout_height="wrap_content"
    android:text="TextView"
    android:textSize="15sp"
    android:width="70dp" />

<RadioButton
    android:id="@+id/radioButton"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content" />

来源：https://stackoverflow.com/questions/8337180/custom-single-choice-listview

标签

android

listview

choice