The CheckBox of ListView is selected/unselected, listviewcheckbox

The CheckBox of ListView is selected/unselected, listviewcheckbox

Define a HashMap list in the Adapter class to save whether each row is selected:

private static HashMap<Integer, Boolean> isSelected;

The HashMap list named isSelected is defined, and its getter and setter methods are defined as follows:

    public static void setIsSelected(HashMap<Integer, Boolean> isSelected)   {          MyAdapter.isSelected = isSelected;      }        public static HashMap<Integer, Boolean> getIsSelected() {          return isSelected;      }

In the constructor of the Adapter class, set all the initial values of isSelected to false:

    public MyAdapter(Context context, List<String> list){        this.context = context;        this.list = list;                isSelected = new HashMap<Integer, Boolean>();        initData();    }        private void initData() {          for (int i = 0; i < list.size(); i++) {              getIsSelected().put(i, false);          }      }

In the getView method, define the CheckBox clicking method. When the CheckBox is selected or not, set the value of isSelected to true/false. At the same time, set whether the CheckBox is selected based on the value of isSelected, the corresponding icons are displayed:

        mCheckbox = (CheckBox)convertView.findViewById(R.id.chkBox);        mCheckbox.setOnCheckedChangeListener(new OnCheckedChangeListener(){            @Override            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {                // TODO Auto-generated method stub                if (isChecked){                    buttonView.setButtonDrawable(R.drawable.r02);                    isSelected.put(position, true);                }else{                    buttonView.setButtonDrawable(R.drawable.r01);                    isSelected.put(position, false);                }            }                    });        mCheckbox.setChecked(getIsSelected().get(position));        if (getIsSelected().get(position)){            mCheckbox.setButtonDrawable(R.drawable.r02);        }else{            mCheckbox.setButtonDrawable(R.drawable.r01);        }

In the main form file, When you click the CheckBox under the list, call the selectAll method to set all values of isSelected to true/false, and display the corresponding icon:

    @Override    public void onClick(View v) {        // TODO Auto-generated method stub        switch (v.getId()){        case R.id.chkSelect:            selectAll(chkSelect.isChecked());            break;        case R.id.btnDelete:            break;        default:            break;        }            }

    private void selectAll(boolean x){        for (int i=0; i<mList.size(); i++){            mAdapter.getIsSelected().put(i, x);        }        if (chkSelect.isChecked()){            chkSelect.setButtonDrawable(R.drawable.r02);        }else{            chkSelect.setButtonDrawable(R.drawable.r01);        }        mAdapter.notifyDataSetChanged();    }

The complete file is as follows.

MainActivity. java:

Package com. hzhi. mylistview; import android. support. v7.app. actionBarActivity; import java. util. arrayList; import java. util. list; import android. OS. bundle; import android. view. menu; import android. view. menuItem; import android. view. view; import android. view. view. onClickListener; import android. widget. button; import android. widget. checkBox; import android. widget. listView; public class MainActivity extends ActionBarActivity implements OnClickListener {private CheckBox chkSelect; private Button btnDelete; private List <String> mList; private MyAdapter mAdapter; private ListView mListview; @ Override protected void onCreate (Bundle savedInstanceState) {super. onCreate (savedInstanceState); setContentView (R. layout. activity_main); initView (); initData (); mAdapter = new MyAdapter (MainActivity. this, mList); mListview. setAdapter (mAdapter);} private void initView () {chkSelect = (CheckBox) findViewById (R. id. chkSelect); btnDelete = (Button) findViewById (R. id. btnDelete); mListview = (ListView) findViewById (R. id. lstView); chkSelect. setOnClickListener (this); btnDelete. setOnClickListener (this); chkSelect. setButtonDrawable (R. drawable. r01);} private void initData () {mList = new ArrayList <String> (); for (int I = 0; I <10; I ++) {mList. add ("th" + String. valueOf (I) + "data") ;}} private void selectAll (boolean x) {for (int I = 0; I <mList. size (); I ++) {mAdapter. getIsSelected (). put (I, x);} if (chkSelect. isChecked () {chkSelect. setButtonDrawable (R. drawable. r02);} else {chkSelect. setButtonDrawable (R. drawable. r01);} mAdapter. notifyDataSetChanged () ;}@ Override public void onClick (View v) {// TODO Auto-generated method stub switch (v. getId () {case R. id. chkSelect: selectAll (chkSelect. isChecked (); break; case R. id. btnDelete: break; default: break ;}}}

MyAdapter. java:

package com.hzhi.mylistview;import java.util.HashMap;import java.util.List;import android.content.Context;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.CheckBox;import android.widget.CompoundButton;import android.widget.TextView;import android.widget.CompoundButton.OnCheckedChangeListener;public class MyAdapter extends BaseAdapter{        List<String> list;    Context context;    private static HashMap<Integer, Boolean> isSelected;        public MyAdapter(Context context, List<String> list){        this.context = context;        this.list = list;                isSelected = new HashMap<Integer, Boolean>();        initData();    }        private void initData() {          for (int i = 0; i < list.size(); i++) {              getIsSelected().put(i, false);          }      }    @Override    public int getCount() {        // TODO Auto-generated method stub        return list.size();    }    @Override    public Object getItem(int position) {        // TODO Auto-generated method stub        return list.get(position);    }    @Override    public long getItemId(int position) {        // TODO Auto-generated method stub        return position;    }    @Override    public View getView(final int position, View convertView, ViewGroup parent) {        // TODO Auto-generated method stub        CheckBox mCheckbox;        TextView mText;                if(convertView == null){            convertView = LayoutInflater.from(context).inflate(R.layout.listitem, null);        }        mCheckbox = (CheckBox)convertView.findViewById(R.id.chkBox);        mCheckbox.setOnCheckedChangeListener(new OnCheckedChangeListener(){            @Override            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {                // TODO Auto-generated method stub                if (isChecked){                    buttonView.setButtonDrawable(R.drawable.r02);                    isSelected.put(position, true);                }else{                    buttonView.setButtonDrawable(R.drawable.r01);                    isSelected.put(position, false);                }            }                    });        mCheckbox.setChecked(getIsSelected().get(position));        if (getIsSelected().get(position)){            mCheckbox.setButtonDrawable(R.drawable.r02);        }else{            mCheckbox.setButtonDrawable(R.drawable.r01);        }                mText = (TextView)convertView.findViewById(R.id.txtText);        mText.setText(list.get(position).toString());                return convertView;    }        public static void setIsSelected(HashMap<Integer, Boolean> isSelected) {          MyAdapter.isSelected = isSelected;      }        public static HashMap<Integer, Boolean> getIsSelected() {          return isSelected;      }}

The running effect is as follows: