ListView的全选反选
package bwie.day02_listview;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.AdapterView;
import android.widget.Button;
import android.widget.ListView;
import android.widget.ScrollView;
import android.widget.Toast;
import java.util.ArrayList;
import java.util.List;
import bwie.day02_listview.adapter.MyAdapter;
import bwie.day02_listview.bean.MyData;
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
private ListView lv;
private Button all;
private Button no;
private Button hide;
private boolean isHide = false;
List list = new ArrayList<>();
private MyAdapter adapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
init();
initData();
adapter = new MyAdapter(list, this);
lv.setAdapter(adapter);
}
private void initData() {
for (int i = 0; i < 50; i++) {
MyData data = new MyData();
data.setContent("内容" + i);
data.setIscheck(false);
data.setPosition(i);
list.add(data);
}
}
/**
* 初始化控件
*/
private void init() {
lv = (ListView) findViewById(R.id.lv);
all = (Button) findViewById(R.id.all);
no = (Button) findViewById(R.id.no);
hide = (Button) findViewById(R.id.hide);
ScrollView scrollView= (ScrollView) findViewById(R.id.sv);
scrollView.smoothScrollBy(0,0);
all.setOnClickListener(this);
no.setOnClickListener(this);
hide.setOnClickListener(this);
lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView parent, View view, int position, long id) {
Toast.makeText(MainActivity.this, "aa", Toast.LENGTH_SHORT).show();
}
});
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.all:
check(true);
break;
case R.id.no:
check(false);
break;
case R.id.hide:
isHide = isHide == true ? false : true;
Hide(isHide);
break;
}
}
public void check(boolean ischeck) {
for (MyData data : list) {
data.setIscheck(ischeck);
adapter.notifyDataSetChanged();
}
}
public void Hide(boolean ishide) {
if (ishide) {
hide.setText("取消隐藏");
} else {
hide.setText("隐藏已选");
}
adapter.setHide(ishide);
adapter.notifyDataSetChanged();
}
}
适配器
package bwie.day02_listview.adapter;
import android.content.Context;
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.Toast;
import java.util.ArrayList;
import java.util.List;
import bwie.day02_listview.R;
import bwie.day02_listview.bean.MyData;
/**
* Created by Gaojian on 2016/11/1.
*/
public class MyAdapter extends BaseAdapter {
private List list = new ArrayList<>();
private List bflist;
private Context context;
private boolean ishide;
public MyAdapter(List list, Context context) {
this.bflist = list;
this.list.addAll(bflist);
this.context = 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;
}
/**
* 设置是否隐藏
*
* @param ishide
*/
public void setHide(boolean ishide) {
this.ishide = ishide;
}
@Override
public void notifyDataSetChanged() {
list.clear();
list.addAll(bflist);
if (ishide) {
List dellist = new ArrayList<>();
for (MyData data : list) {
if (data.ischeck()) {
dellist.add(data);
}
}
for (MyData data : dellist) {
list.remove(data);
}
}
super.notifyDataSetChanged();
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
ViewHolder vh = null;
if (convertView == null) {
vh = new ViewHolder();
convertView = View.inflate(context, R.layout.lv_item, null);
vh.checkBox = (CheckBox) convertView.findViewById(R.id.checkBox);
vh.content = (TextView) convertView.findViewById(R.id.content);
vh.index = (TextView) convertView.findViewById(R.id.index);
vh.position = (TextView) convertView.findViewById(R.id.position);
vh.index.setText(position + "");
convertView.setTag(vh);
} else {
vh = (ViewHolder) convertView.getTag();
}
vh.content.setText(list.get(position).getContent());
vh.position.setText(list.get(position).getPosition() + "");
vh.checkBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
list.get(position).setIscheck(isChecked);
System.out.println("position"+position);
Toast.makeText(context, "ischeck" + isChecked, Toast.LENGTH_SHORT).show();
notifyDataSetChanged();
}
});
vh.checkBox.setChecked(list.get(position).ischeck());
return convertView;
}
class ViewHolder {
CheckBox checkBox;
TextView content;
TextView index;
TextView position;
}
}
//自定义listview 避免高度不能计算的问题
import android.content.Context;
import android.util.AttributeSet;
import android.widget.ListView;
/**
* Created by Gaojian on 2016/11/2.
*/
public class CustomListview extends ListView {
public CustomListview(Context context) {
super(context);
}
public CustomListview(Context context, AttributeSet attrs) {
super(context, attrs);
}
public CustomListview(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
int expandSpec = MeasureSpec.makeMeasureSpec(Integer.MAX_VALUE >> 2, MeasureSpec.AT_MOST);
super.onMeasure(widthMeasureSpec, expandSpec);
}
}
//布局文件
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/sv"
tools:context="bwie.day02_listview.MainActivity">
<LinearLayout
android:layout_width="match_parent"
android:orientation="vertical"
android:layout_height="match_parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<Button
android:id="@+id/all"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="全选" />
<Button
android:id="@+id/no"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="不全选" />
<Button
android:id="@+id/hide"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="隐藏已选" />
LinearLayout>
<bwie.day02_listview.bean.CustomListview
android:id="@+id/lv"
android:layout_width="match_parent"
android:layout_height="match_parent" />
LinearLayout>
ScrollView>