使用Android中的复选框从列表视图中删除多个项目 [英] Removing muliple items from listview using Check box in Android

问题描述

我坚持使用复选框从列表视图中删除多个项目.我可以从列表视图中选择多个项目，但只有选择的第一个项目被删除，而其他项目没有被删除.这是我的代码.提前致谢！

Hi i am stuck with deleting multiple items from listview using checkbox. I am able to select multiple items from listview but only the first item that is selected, is getting deleted while other items are not being deleted. Here is my code. Thanks in Advance!

public class MainActivity extends Activity 
{
    ListView lv;
    ArrayAdapter<String> adapter;
    Button delete;
    ArrayList<String> data = new ArrayList<String>();
    @Override
    protected void onCreate(Bundle savedInstanceState) 
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        lv = (ListView)findViewById(R.id.listView1);
        delete = (Button)findViewById(R.id.button1);
        data.add("Windows");
        data.add("Android");
        data.add("Apple");
        data.add("Blackberry");
        adapter = new ArrayAdapter<String>(MainActivity.this, android.R.layout.simple_list_item_multiple_choice, data);
        lv.setAdapter(adapter);

        delete.setOnClickListener(new OnClickListener()
        {
            @Override
            public void onClick(View v)
            {
                deleteCheckedItems();
                adapter.notifyDataSetChanged();
            }
        });


    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) 
    {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.activity_main, menu);
        return true;
    }
    private void deleteCheckedItems() {
        int count = adapter.getCount();

        for (int i = 0; i < count; i++) 
        {
            if (lv.isItemChecked(i))
            {
               data.remove(i);
            }
        }
    }

}

推荐答案

使用 SparseBooleanArray 获取选中的项，然后删除相同的项并刷新列表视图.

Use a SparseBooleanArray to get the checked items and then delete the same and refresh listview.

public class MainActivity extends Activity 
{
    ListView lv;
    ArrayAdapter<String> adapter;
    Button delete;
    ArrayList<String> data = new ArrayList<String>();
    SparseBooleanArray mCheckStates ;
    @Override
    protected void onCreate(Bundle savedInstanceState) 
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.test);
        lv = (ListView)findViewById(R.id.listView1);
        lv.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
        delete = (Button)findViewById(R.id.button1);
        data.add("Windows");
        data.add("Android");
        data.add("Apple");
        data.add("Blackberry");
        adapter = new ArrayAdapter<String>(MainActivity.this, android.R.layout.simple_list_item_multiple_choice, data);
        lv.setAdapter(adapter);

        delete.setOnClickListener(new OnClickListener()
        {
            @Override
            public void onClick(View v)
            {

                SparseBooleanArray checked = lv.getCheckedItemPositions();
                for (int i = 0; i < lv.getCount(); i++){

                    if (checked.get(i)==true)
                    {
                         data.remove(i);

                    } 
                    adapter.notifyDataSetChanged(); 

                }
                 lv.clearChoices();               
            }
        });


    }
}

试试下面的

 delete.setOnClickListener(new OnClickListener()
    {
        @Override
        public void onClick(View v)
        {

             SparseBooleanArray checkedItemPositions = lv.getCheckedItemPositions();
             int itemCount = lv.getCount();

             for(int i=itemCount-1; i >= 0; i--){
                 if(checkedItemPositions.get(i)){
                     adapter.remove(data.get(i));
                 }
             }
             checkedItemPositions.clear();
             adapter.notifyDataSetChanged();

        }
    });

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