Android全选删除CheckBox的简单使用

拼搏现实的明天。 2022-10-01 00:38 193阅读 0赞

main activity：

public class RecordActivity extends AppCompatActivity {
        @BindView(R.id.activity_item_record_recyclerview)
        RecyclerView recyclerView;
        @BindView(R.id.record_all_check)
        CheckBox allcheck;
        @BindView(R.id.record_btn_delete)
        Button delete;
        @BindView(R.id.record_btn_submit)
        Button submit;
        @BindView(R.id.record_all_ll)
        LinearLayout ll_btn;
    
        ItemAdapter adapter;
        RecyclerView.LayoutManager manager;
        ArrayList<ActionData> list;
        private String actionName;
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_record);
            ButterKnife.bind(this);
       
            manager = new LinearLayoutManager(this);
            recyclerView.setLayoutManager(manager);
    
            adapter = new ItemAdapter(list);
    
            recyclerView.setAdapter(adapter);
           
            setAllcheck();
        }
      
        private void setAllcheck(){
            allcheck.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
                @Override
                public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                    if (isChecked){
                        for (int i = 0; i < list.size(); i++) {
                            if (!list.get(i).isCheck()){
                                list.get(i).setCheck(true);
                            }
                        }
                    }else {
                        //当全选的时候在取消全不选
                        if (getChechedSum()== list.size()){
                            for (int i = 0; i < list.size(); i++) {
                                if (list.get(i).isCheck()){
                                    list.get(i).setCheck(false);
                                }
                            }
                        }
                    }
                    UpdateRecyclerView();
                }
            });
            adapter.setChecked(new ItemAdapter.onChecked() {
                @Override
                public void CheckedChanged(int position, boolean isChecked) {
                    //保存选择状态
                    list.get(position).setCheck(isChecked);
                    //全选了才是设全选按钮为选择
                    if (getChechedSum()== list.size()){
                        allcheck.setChecked(true);
                    }else{
                        //选择了才取消
                        if (allcheck.isChecked()){
                            allcheck.setChecked(false);
                        }
                    }
                    UpdateRecyclerView();
                }
            });
        }
        /*
            *解决Recycleyview刷新报错问题
           */
        private void UpdateRecyclerView() {
            Handler handler = new Handler();
            final Runnable r = new Runnable() {
                public void run() {
                    adapter.notifyDataSetChanged();
                }
            };
            handler.post(r);
        }
    
        /**
         * 计算选择的数目
         * @return
         */
        private int getChechedSum(){
            int checkNum = 0;
            for (int i = 0; i < list.size(); i++) {
                if (list.get(i).isCheck()){
                    checkNum++;
                }
            }
            return checkNum;
        }
    
        @Override
        protected void onPause() {
            super.onPause();
            //不可见状态时刷新界面
            for (int i = 0; i < list.size(); i++) {
                if (list.get(i).isCheck()){
                    list.get(i).setCheck(false);
                }
            }
            //选择了才取消
            if (allcheck.isChecked()){
                allcheck.setChecked(false);
            }
            UpdateRecyclerView();
        }
    }

adpter:

public class ItemAdapter extends RecyclerView.Adapter<ItemAdapter.MyHolder>{
        private ArrayList<ActionData> list;
        private onChecked checked;
    
        public void setChecked(onChecked checked) {
            this.checked = checked;
        }
    
        public ItemAdapter(ArrayList<ActionData> list){
            this.list = list;
        }
        @Override
        public MyHolder onCreateViewHolder(ViewGroup parent, int viewType) {
            View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.record_list,parent,false);
            MyHolder holder = new MyHolder(view);
            return holder;
        }
    
        @Override
        public void onBindViewHolder(final MyHolder holder, final int position) {
            if (list.get(position).getFileName().contains(".txt")){
                holder.record_icon.setImageResource(R.drawable.txt);
            }else {
                holder.record_icon.setImageResource(R.drawable.direct);
            }
            holder.record_name.setText(list.get(position).getFileName());
            holder.record_size.setText(ClearData.getFormatSize((double) list.get(position).getFileSize()));
    
            if (list.get(position).isCheck()){
                holder.record_check.setChecked(true);
            }else {
                holder.record_check.setChecked(false);
            }
    
            //获取选择状态
            holder.record_check.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
                @Override
                public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                    checked.CheckedChanged(position,isChecked);
                }
            });
    
    
            //长按编辑
            holder.itemView.setOnLongClickListener(new View.OnLongClickListener() {
                @Override
                public boolean onLongClick(View v) {
                    //设置编辑可见
    
                    return true; //返回true时不响应短按事件
                }
            });
            //短按查看
            holder.itemView.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    String path = list.get(position).getActionName()+"/"+list.get(position).getFileName();
                    if (list.get(position).getFileName().contains(".txt")){
                        ItemActivity.getFilesinfo(path);
                        Intent intent = new Intent(v.getContext(),ReadActivity.class);
                        intent.putExtra("file_name",path);
                        v.getContext().startActivity(intent);
                    }else {
                        ItemActivity.getFilesinfo(path);
                        Intent intent = new Intent(v.getContext(),RecordActivity.class);
                        intent.putExtra("record_name",path);
                        v.getContext().startActivity(intent);
                    }
    
                }
            });
        }
    
        @Override
        public int getItemCount() {
            return list.size();
        }
    
        protected static class MyHolder extends RecyclerView.ViewHolder{
            @BindView(R.id.record_one_icon)
            ImageView record_icon;
            @BindView(R.id.record_one_name)
            TextView record_name;
            @BindView(R.id.record_one_gathersize)
            TextView record_size;
            @BindView(R.id.record_one_check)
            CheckBox record_check;
            public MyHolder(View itemView) {
                super(itemView);
                ButterKnife.bind(this,itemView);
            }
        }
        public static interface onChecked{
            //选择点击事件回调
            public void CheckedChanged(int position, boolean isChecked);
    
        }
    }

data:

public class ActionData extends DataSupport {
        private String actionName;
        private String gatherTime;
        private String fileName;
        private float fileSize;
        private boolean isCheck;
        public ActionData(){
    
        }
    
        public String getActionName() {
            return actionName;
        }
    
        public void setActionName(String actionName) {
            this.actionName = actionName;
        }
    
        public String getGatherTime() {
            return gatherTime;
        }
    
        public void setGatherTime(String gatherTime) {
            this.gatherTime = gatherTime;
        }
    
        public String getFileName() {
            return fileName;
        }
    
        public void setFileName(String fileName) {
            this.fileName = fileName;
        }
    
        public float getFileSize() {
            return fileSize;
        }
    
        public void setFileSize(float fileSize) {
            this.fileSize = fileSize;
        }
    
        public boolean isCheck() {
            return isCheck;
        }
    
        public void setCheck(boolean check) {
            isCheck = check;
        }
    }