ListView中CheckBox全选，取消全选，删除功能

在开发中接到一个功能要求在ListView中实现对CheckBox的全选，取消全选，删除的功能。
先上图

Screenshot_2018-11-01-16-07-31.png Screenshot_2018-11-01-16-07-38.png

实现步骤：
1、创建TestAdapter 继承 BaseAdapter 并重写 四个方法

public class TestAdapter extends BaseAdapter {
    private Context context;
    private List<Map<String, String>> list;

    //用来保存checkbox的状态
    private Map<Integer, Boolean> map = new HashMap<>();

    public TestAdapter(Context context, List<Map<String, String>> list) {
        this.context = context;
        this.list = list;
        initCheck(false);
    }
    //初始化checkBox状态
    public void initCheck(boolean flag) {
        for (int i = 0; i < list.size(); i++) {
            map.put(i, flag);
        }
    }

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

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

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

    @Override
    public View getView(final int position, View convertView, ViewGroup parent) {
        ViewHolder viewHolder = null;
        if (convertView == null) {
            convertView = LayoutInflater.from(context).inflate(R.layout.item_test, parent, false);
            viewHolder = new ViewHolder(convertView);
            convertView.setTag(viewHolder);
        } else {
            viewHolder = (ViewHolder) convertView.getTag();
        }
        viewHolder.itemTv.setText(list.get(position).get("value"));
        viewHolder.itemCheck.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                map.put(position, isChecked);
            }
        });
        if (map.get(position) == null) {
            map.put(position, false);
        }
        viewHolder.itemCheck.setChecked(map.get(position));
        //判断是否为编辑状态
        if ("false".equals(list.get(position).get("isHide"))) {
            viewHolder.itemCheck.setVisibility(View.VISIBLE);
        } else {
            viewHolder.itemCheck.setVisibility(View.GONE);
        }
        return convertView;
    }

    class ViewHolder {
        @BindView(R.id.item_check)
        CheckBox itemCheck;
        @BindView(R.id.item_tv)
        TextView itemTv;

        ViewHolder(View view) {
            ButterKnife.bind(this, view);
        }
    }

    public Map<Integer, Boolean> getMap() {
        return map;
    }

    // 删除一个数据
    public void removeData(int position) {
        list.remove(position);
    }

Activity代码

public class MainActivity extends AppCompatActivity {

    @BindView(R.id.testListView)
    ListView testListView;
    @BindView(R.id.bottom_linear)
    LinearLayout bottomLinear;
    @BindView(R.id.checkAll)
    Button checkAll;
    @BindView(R.id.editBtn)
    TextView editBtn;
    private TestAdapter adapter;

    private List<Map<String, String>> list;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        ButterKnife.bind(this);
        initList();
    }

    private void initList() {
        list = new ArrayList<>();
        for (int i = 1; i < 10; i++) {
            Map<String, String> map = new HashMap<>();
            map.put("isHide", "true");
            map.put("value", "测试数据" + i);
            list.add(map);
        }
        adapter = new TestAdapter(this, list);
        testListView.setAdapter(adapter);
    }

    @OnClick(R.id.editBtn)
    public void onViewClicked() {
        if ("完成".equals(editBtn.getText().toString().trim())) {
            editBtn.setText("编辑");
            bottomLinear.setVisibility(View.GONE);
            for (int i = 0; i < list.size(); i++) {
                list.get(i).put("isHide", "true");
                adapter.notifyDataSetChanged();
            }
        } else {
            editBtn.setText("完成");
            bottomLinear.setVisibility(View.VISIBLE);
            for (int i = 0; i < list.size(); i++) {
                list.get(i).put("isHide", "false");
                adapter.notifyDataSetChanged();
            }
        }
    }

    @OnClick({R.id.checkAll, R.id.delete})
    public void onViewClicked(View view) {
        switch (view.getId()) {
            case R.id.checkAll:
                if ("全选".equals(checkAll.getText().toString())) {
                    adapter.initCheck(true);
                    checkAll.setText("全不选");
                } else {
                    adapter.initCheck(false);
                    checkAll.setText("全选");
                }
                adapter.notifyDataSetChanged();
                break;
            case R.id.delete:
                delete();
                break;
        }
    }

    private void delete() {
        // 拿到所有数据
        Map<Integer, Boolean> isCheck_delete = adapter.getMap();
        // 获取到条目数量，map.size = list.size,所以
        int count = adapter.getCount();
        // 遍历
        for (int i = 0; i < count; i++) {
            // 删除有两个map和list都要删除 ,计算方式
            int position = i - (count - adapter.getCount());
            // 判断状态 true为删除
            if (isCheck_delete.get(i) != null && isCheck_delete.get(i)) {
                // listview删除数据
                isCheck_delete.remove(i);
                adapter.removeData(position);
            }
        }
        adapter.notifyDataSetChanged();
    }

}

ok，大功告成。