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Android開發中使用ListView 與 CheckBox實現一個多選框功能？針對這個問題，這篇文章詳細介紹了相對應的分析和解答，希望可以幫助更多想解決這個問題的小伙伴找到更簡單易行的方法。
效果：
1 單選
public class SingleActivity extends AppCompatActivity {
private ListView listView;
private ArrayList<String> groups;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_single);
listView = (ListView) this.findViewById(R.id.lvGroup);
groups = new ArrayList<String>();
groups.add("11");
groups.add("22");
groups.add("33");
groups.add("44");
groups.add("55");
groups.add("66");
groups.add("77");
AdapterView.OnItemClickListener listItemClickListener = new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
// 取得ViewHolder對象，這樣就省去了通過層層的findViewById去實例化我們需要的cb實例的步驟
SingleAdapter.ViewHolder viewHolder = (SingleAdapter.ViewHolder) view.getTag();
viewHolder.cb.toggle();// 把CheckBox的選中狀態改為當前狀態的反,gridview確保是單一選中
}
};
SingleAdapter adapter = new SingleAdapter(this, groups);
listView.setAdapter(adapter);
listView.setOnItemClickListener(listItemClickListener);
}
}Adapter：
public class SingleAdapter extends BaseAdapter {
private Activity activity;//上下文
private ArrayList<String> list;
private LayoutInflater inflater = null;//導入布局
private int temp = -1;
public SingleAdapter(Activity context, ArrayList<String> list) {
this.activity = context;
this.list = list;
inflater = LayoutInflater.from(context);
}
@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;
}
//listview每顯示一行數據,該函數就執行一次
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder = null;
if (convertView == null) {//當第一次加載ListView控件時 convertView為空
convertView = inflater.inflate(R.layout.group_item_view, null);//所以當ListView控件沒有滑動時都會執行這條語句
holder = new ViewHolder();
holder.tv = (TextView) convertView.findViewById(R.id.item_tv);
holder.cb = (CheckBox) convertView.findViewById(R.id.item_cb);
convertView.setTag(holder);//為view設置標簽
} else {//取出holder
holder = (ViewHolder) convertView.getTag();
}
//設置list的textview顯示
holder.tv.setTextColor(Color.WHITE);
holder.tv.setText(list.get(position));
// 根據isSelected來設置checkbox的選中狀況
holder.cb.setId(position);//對checkbox的id進行重新設置為當前的position
holder.cb.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton compoundButton, boolean isChecked) {
if (isChecked) {//實現checkbox的單選功能,同樣適用于radiobutton
if (temp != -1) {
//找到上次點擊的checkbox,并把它設置為false,對重新選擇時可以將以前的關掉
CheckBox tempCheckBox = (CheckBox) activity.findViewById(temp);
if (tempCheckBox != null)
tempCheckBox.setChecked(false);
}
temp = compoundButton.getId();//保存當前選中的checkbox的id值
}
}
});
if (position == temp)//比對position和當前的temp是否一致
holder.cb.setChecked(true);
else
holder.cb.setChecked(false);
return convertView;
}
public static class ViewHolder {
TextView tv;
CheckBox cb;
}
}多選：
public class MulActivity extends AppCompatActivity {
private ListView listView;
private ArrayList<String> groups;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_mul);
listView = (ListView) this.findViewById(R.id.list);
groups = new ArrayList<>();
groups.add("11");
groups.add("22");
groups.add("33");
groups.add("44");
groups.add("55");
groups.add("66");
groups.add("77");
AdapterView.OnItemClickListener listItemClickListener = new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position,
long id) {
// 取得ViewHolder對象，這樣就省去了通過層層的findViewById去實例化我們需要的cb實例的步驟
MulAdapter.ViewHolder viewHolder = (MulAdapter.ViewHolder) view.getTag();
viewHolder.cb.toggle();// 把CheckBox的選中狀態改為當前狀態的反,gridview確保是單一選中
MulAdapter.getIsSelected().put(position, viewHolder.cb.isChecked());//將CheckBox的選中狀況記錄下來
}
};
MulAdapter adapter = new MulAdapter(this, groups);
listView.setAdapter(adapter);
listView.setOnItemClickListener(listItemClickListener);
}
}Adapter：
public class MulAdapter extends BaseAdapter {
private Context context;//上下文
private ArrayList<String> list;
//控制CheckBox選中情況
private static HashMap<Integer, Boolean> isSelected;
private LayoutInflater inflater = null;//導入布局
public MulAdapter(Context context, ArrayList<String> list) {
this.context = context;
this.list = list;
inflater = LayoutInflater.from(context);
isSelected = new HashMap<Integer, Boolean>();
initData();
}
private void initData() {//初始化isSelected的數據
for (int i = 0; i < list.size(); i++) {
getIsSelected().put(i, false);
}
}
@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;
}
//listview每顯示一行數據,該函數就執行一次
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder = null;
if (convertView == null) {//當第一次加載ListView控件時 convertView為空
convertView = inflater.inflate(R.layout.group_item_view, null);//所以當ListView控件沒有滑動時都會執行這條語句
holder = new ViewHolder();
holder.tv = (TextView) convertView.findViewById(R.id.item_tv);
holder.cb = (CheckBox) convertView.findViewById(R.id.item_cb);
convertView.setTag(holder);//為view設置標簽
} else {//取出holder
holder = (ViewHolder) convertView.getTag();//the Object stored in this view as a tag
}
//設置list的textview顯示
holder.tv.setTextColor(Color.WHITE);
holder.tv.setText(list.get(position));
// 根據isSelected來設置checkbox的選中狀況
holder.cb.setChecked(getIsSelected().get(position));
return convertView;
}
public static class ViewHolder {
TextView tv;
CheckBox cb;
}
public static HashMap<Integer, Boolean> getIsSelected() {
return isSelected;
}
public static void setIsSelected(HashMap<Integer, Boolean> isSelected) {
MulAdapter.isSelected = isSelected;
}
}關于Android開發中使用ListView 與 CheckBox實現一個多選框功能問題的解答就分享到這里了，希望以上內容可以對大家有一定的幫助，如果你還有很多疑惑沒有解開，可以關注億速云行業資訊頻道了解更多相關知識。
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