android - isChecked() 行为在 2.3.6 和 4.2 android 版本中完全相反

Question

我正在开发一个简单的 Android 应用程序，它创建一个带有复选框的 ListView，如下所示

listAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_multiple_choice,results);
this.setListAdapter(listAdapter);
ListView lv = getListView();
lv.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);

lv.setOnItemClickListener(new OnItemClickListener(){
    @Override
     public void onItemClick(AdapterView<?> parent, View view, int position,
                        long id) {
           CheckedTextView check = (CheckedTextView)view;
           //The below code needed for running on AVD version 4.2
           if(check.isChecked()) { 
                   // Checkbox checked do something 
            } 
           else { 
                    // Not checked. Do something 
            }
            /* Exact opposite need on Samsung phone running 2.3.6
            if(!check.isChecked()) {
                      // Checkbox checked do something
            }
            else {
             // Not checked. DO something
            } */

这真的很奇怪。当两个版本需要完全相反的检查时，应用程序将如何与这两个版本兼容？

请告诉我如何处理这个问题。任何帮助将不胜感激。

Answer 1

我知道这个问题，在较新的框架上，onItemClick 在复选框的 checkd 属性更改之前调用!

我在点击项目后检查我的复选框的选中状态(例如，在 Activity 关闭或保存按钮点击时)。

看看 list.getCheckedItemPositions()...它会返回一个 SparseBooleanArray 你可以使用!

编辑:例子

public class MyMultiChoiceActivity extends Activity implements View.OnClickListener {

    private ListView list = null;
    private boolean savedSelectionInvalid = true;
    private List<Integer> selectedIds = new ArrayList<Integer>();

    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        this.setContentView(R.layout.entry_data_multi_choice_filter);

        //initialize the list
        list = (ListView) findViewById(R.id.list);
        listAdapter = new MyListAdapterClass(this, R.layout.list_item_multiple_choice);
        list.setAdapter(listAdapter);

        //onclick on a item, set the selectaion as invalid
        list.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
                savedSelectionInvalid = true;
            }
        });

        list.setAdapter(listAdapter);

        //...
    }

    //...

    private void validateChecked() {
        if(savedSelectionInvalid == true) {
            SparseBooleanArray checkedItemlist = list.getCheckedItemPositions();
            selectedIds.clear();
            for (int i=0; i < checkedItemlist.size(); i++){

                if (checkedItemlist.valueAt(i)) {
                    selectedIds.add(a.keyAt(i));
                }
            }
            this.savedSelectionInvalid = false;
        }
    }

    //...

    //this method se
    private void saveAndClose() {
        validateChecked();

        //now you have the selectedIds filled with every checked item key!

        this.finish();
    }
}