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Android通过Adapter获取ListView中的Chec

2016-11-29  本文已影响1722人  瓶子君




Adapter;


public class Adapter extends BaseAdapter {

    private List<String> stringList;
    private Context mContext;
    private List<String> checkBoxIDList;            //存储checkBox的值

    //get set
    public List<String> getCheckBoxIDList() {
        return checkBoxIDList;
    }
    public void setCheckBoxIDList(List<String> checkBoxIDList) {
        this.checkBoxIDList = checkBoxIDList;
    }
    public Adapter(List<String> stringList, Context mContext) {
        this.stringList = stringList;
        this.mContext = mContext;
        checkBoxIDList= new ArrayList<>();
    }

    @Override
    public int getCount() {
        return stringList.size();
    }

    @Override
    public Object getItem(int position) {
        return stringList.get(position);
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

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

        final TestViewHolder testViewHolder;
        
        if (convertView == null) {
            convertView = LayoutInflater.from(mContext).inflate(R.layout.item, null);
            testViewHolder = new TestViewHolder();

            testViewHolder.item_checkBox = (CheckBox) convertView.findViewById(R.id.checkbox);

            convertView.setTag(testViewHolder);
        } else {
            testViewHolder = (TestViewHolder) convertView.getTag();
        }

        //设置checkBox的值
        testViewHolder.item_checkBox.setText("List:" + stringList.get(position).toString());

        //获取复选框选中状态改变事件进行增删改
        testViewHolder.item_checkBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(CompoundButton compoundButton, boolean b) {
                /*
                * b=选中状态
                * if b = true 将值添加至checkBoxIDList
                * if b = false 将值从checkBoxIDList移除
                * */
                if (b) {

            checkBoxIDList.add(testViewHolder.item_checkBox.getText().toString());

                } else {
                   
            checkBoxIDList.remove(testViewHolder.item_checkBox.getText().toString());
                
                }
            }
        });
        return convertView;
    }

    static class TestViewHolder {
    
        CheckBox item_checkBox;
       
    }

}


MainActivity;

public class MainActivity extends AppCompatActivity {

    private List<String> TestAdapterList;
    private Adapter adapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        final ListView listView = (ListView) findViewById(R.id.listview);
        
        //对List赋值
        TestAdapterList= new ArrayList<>();
        TestAdapterList.add("1");
        TestAdapterList.add("2");
        TestAdapterList.add("3");
        TestAdapterList.add("4");
        TestAdapterList.add("5");
        TestAdapterList.add("6");
        TestAdapterList.add("7");
        TestAdapterList.add("8");
        TestAdapterList.add("9");

        //setAdapter
        adapter = new Adapter(TestAdapterList, MainActivity.this);
        listView.setAdapter(adapter);

        //button单击
        Button button = (Button) findViewById(R.id.button);
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {

                System.out.println("------------");
                /*
                *循环打印选中checkBox的值
                *通过adapter.getCheckBoxIDList()获取所选checkBox值的集合
                */
                for (int i = 0; i < adapter.getCheckBoxIDList().size(); i++) {

                System.out.println(adapter.getCheckBoxIDList().get(i).toString());

                }

            }
        });
    }
}

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