[移动开发]ListView批量删除Item条目，渣本毕业两年经验

• ListView的Item批量删除

*/

public class MainActivity extends AppCompatActivity {

private ListView mListView;

private ListVIewAdapter ladapter;

private Button mButton1,mButton2;

private List strList = new ArrayList();

private List boolList = new ArrayList();

boolean visflag = false;

ListView lv;

static String str[] ={“1蓝瘦”,“2豆瓣酱”,“3海天豆瓣酱”,“4野竹笋”,“5黄菊花”,“6野菊花”,“7野黄菊花”,“8野桃子”,“9木瓜”,“10野木瓜”,“11野哈密瓜”,“12野桂圆”,“13竹笋”,“14山竹”,“15苦瓜”,“16茄子”,“17土豆”,“18蒜台”,“19辣椒”,“20香菇”};

CheckBox cb;

{

for(int i=0;i<str.length;i++)

{

strList.add(str[i]);

boolList.add(false);

}

}

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

init();

}

private void init() {

mListView = (ListView)findViewById(R.id.listview);

mButton1 = (Button)findViewById(R.id.btn1);

mButton2 = (Button)findViewById(R.id.btn2);

mButton1.setOnClickListener(mOnClickListener);

mButton2.setOnClickListener(mOnClickListener);

ladapter = new ListVIewAdapter(this);

mListView.setAdapter(ladapter);

mListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {

@Override

public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

if (visflag) {

ListVIewAdapter.ViewHolder viewHolder = (ListVIewAdapter.ViewHolder) view.getTag();

viewHolder.cb.toggle();

if (viewHolder.cb.isChecked()) {

boolList.set(position, true);

} else {

boolList.set(position, false);

}

}

}

});

}

class ListVIewAdapter extends BaseAdapter

{

Context c;

LayoutInflater mInflater ;

ListVIewAdapter(Context context)

{

c = context;

mInflater = getLayoutInflater();

}

@Override

public int getCount()

{

return strList.size();

}

@Override

public Object getItem(int position)

{

return strList.get(position);

}

@Override

public long getItemId(int position)

{

return position;

}

@Override

public View getView(final int position, View convertView,

ViewGroup parent)

{

ViewHolder holder = null ;

if(convertView == null)

{

holder = new ViewHolder();

convertView = mInflater.inflate(R.layout.list_item, null);

holder.tv = (TextView)convertView.fi

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ndViewById(R.id.textView);

holder.cb = (CheckBox)convertView.findViewById(R.id.checkBox);

convertView.setTag(holder);

}else{

holder = (ViewHolder) convertView.getTag();

}

holder.tv.setText(strList.get(position));

holder.cb.setChecked(boolList.get(position));

if(visflag)

{

holder.cb.setVisibility(View.VISIBLE);

}

else

{

holder.cb.setVisibility(View.INVISIBLE);

}

return convertView;

}

class ViewHolder

{

TextView tv;

CheckBox cb;

}

}

View.OnClickListener mOnClickListener = new View.OnClickListener() {

@Override

public void onClick(View v) {

switch (v.getId()){

case R.id.btn1:

if(visflag) {

visflag = false;

for(int i=0; i<boolList.size();i++) {

boolList.set(i, false);

}

} else {

visflag = true;

}

ladapter.notifyDataSetInvalidated();

break;

case R.id.btn2:

if(boolList.size()>0) {

if(visflag) {

for(int location=0; location<boolList.size(); ) {

if(boolList.get(location)) {

boolList.remove(location);

strList.remove(location);

continue;

}

location++;

}

}

}

ladapter.notifyDataSetChanged();

break;

}

}

};

}

activity_main.mxl布局文件（代码）：

<RelativeLayout xmlns:android=“http://schemas.android.com/apk/res/android”

android:layout_width=“match_parent”

android:layout_height=“match_parent”

android:orientation=“vertical”>

<RelativeLayout

android:id="@+id/relativelayout"

android:layout_width=“match_parent”

android:layout_height=“50dp”

android:background="#59BBF8"

android:gravity=“center”>

<TextView

android:layout_width=“wrap_content”

android:layout_height=“wrap_content”

android:text=“批量删除操作” />

<ListView

android:id="@+id/listview"

android:layout_width=“wrap_content”

android:layout_height=“wrap_content”

android:layout_below="@id/relativelayout"

android:layout_marginBottom=“60dp”>

<LinearLayout

android:layout_width=“match_parent”

android:layout_height=“60dp”