Android 如何从活动的alertdialog中检索多个选中复选框
我在Android 如何从活动的alertdialog中检索多个选中复选框,android,android-recyclerview,android-alertdialog,Android,Android Recyclerview,Android Alertdialog,我在RecyclerView中用列表绑定了AlertDialog。我无法从RecyclerView适配器检索数据 这是我需要获取数据的活动 package com.labs.ankitt.hma; import android.content.DialogInterface; import android.databinding.DataBindingUtil; import android.support.v7.app.AlertDialog; import android.support.
RecyclerView
中用列表绑定了AlertDialog
。我无法从RecyclerView
适配器检索数据
这是我需要获取数据的活动
package com.labs.ankitt.hma;
import android.content.DialogInterface;
import android.databinding.DataBindingUtil;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.LinearLayoutManager;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import com.labs.ankitt.hma.databinding.ActivityHealthBinding;
import com.labs.ankitt.hma.databinding.ItemRecyclerContainerBinding;
import java.util.ArrayList;
import java.util.List;
public class HealthActivity extends AppCompatActivity implements View.OnClickListener {
private ActivityHealthBinding healthBinding;
private ItemRecyclerContainerBinding containerBinding;
private ChoiceAdapter adapter;
private List<Health> healthList = new ArrayList<>();
private Health health;
private String user[];
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
healthBinding = DataBindingUtil.setContentView(this, R.layout.activity_health);
addList();
setListener();
}
private void addList() {
user = getResources().getStringArray(R.array.person_array);
for (String anUser : user) {
health = new Health();
health.setTitle(anUser);
healthList.add(health);
}
}
private void setListener() {
healthBinding.buttonPerson.setOnClickListener(this);
}
@Override
public void onClick(View view) {
if (view == healthBinding.buttonPerson) {
LayoutInflater inflater = this.getLayoutInflater();
AlertDialog.Builder alert = new AlertDialog.Builder(this);
containerBinding = DataBindingUtil.inflate(inflater, R.layout.item_recycler_container, null, false);
alert.setView(containerBinding.getRoot());
alert.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
}
});
alert.setNegativeButton(android.R.string.cancel, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
}
});
adapter= new ChoiceAdapter(this, healthList);
containerBinding.recyclerContiner.setLayoutManager(new LinearLayoutManager(this));
containerBinding.recyclerContiner.setHasFixedSize(true);
containerBinding.recyclerContiner.setAdapter(adapter);
AlertDialog dialog= alert.create();
dialog.show();
}
}
}
如何将数据从回收器适配器获取到主屏幕。您的代码可以压缩到某些行。 最佳方法 您可以使用
复选框
列表轻松设置警报对话框
。这是安卓本身提供的。下面是你如何做到这一点
final CharSequence[] items = {" A "," B "," C "," D "};
final ArrayList seletedItems=new ArrayList();
AlertDialog dialog = new AlertDialog.Builder(this)
.setTitle("Select One")
.setMultiChoiceItems(items, null, new DialogInterface.OnMultiChoiceClickListener() {
@Override
public void onClick(DialogInterface dialog, int indexSelected, boolean isChecked) {
if (isChecked) {
seletedItems.add(indexSelected);
} else if (seletedItems.contains(indexSelected)) {
seletedItems.remove(Integer.valueOf(indexSelected));
}
}
}).setPositiveButton("OK", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int id) {
// Your code when user clicked on OK
}
}).setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int id) {
//todo
}
}).create();
dialog.show();
代码的版本(如果您想知道)
所以,您做得不对,只是将单个运行状况
对象全局化,并在检查更改
处更改其值。这将导致更改列表中每个项目的单个对象。你可以做到这样
通过下面的代码,您可以通过方法adapter.getSelectedList()
获取所选项目列表
导入android.annotation.SuppressLint;
导入android.content.Context;
导入android.databinding.DataBindingUtil;
导入android.support.annotation.NonNull;
导入android.support.v7.widget.RecyclerView;
导入android.view.LayoutInflater;
导入android.view.view;
导入android.view.ViewGroup;
导入android.widget.CompoundButton;
导入java.util.ArrayList;
导入java.util.List;
公共类类扩展了RecyclerView.Adapter{
私人语境;
私人名单健康名单;
公共选项适配器(上下文、列表健康列表){
this.context=上下文;
this.healthList=healthList;
}
公共列表getSelectedList(){
所选列表=新建ArrayList();
用于(健康h:健康列表){
如果(h.isChecked()){
选中。添加(h);
}
}
返回选中的;
}
@非空
@凌驾
public ChoiceHolder onCreateViewHolder(@NonNull ViewGroup父级,int-viewType){
RowItemDataBinding dataBinding=DataBindingUtil.inflate(LayoutInflater.from)(上下文),
R.layout.row_item_data,null,false);
ChoiceHolder=新的ChoiceHolder(dataBinding.getRoot(),dataBinding);
报税表持有人;
}
@凌驾
public void onBindViewHolder(@NonNull final ChoiceHolder,@SuppressLint(“RecyclerView”)final int位置){
Health=healthList.get(位置);
holder.itemDataBinding.checkBoxUser.setOnCheckedChangeListener(新建CompoundButton.OnCheckedChangeListener()){
@凌驾
检查更改后的公共无效(复合按钮视图,布尔值已检查){
运行状况。设置已检查(已检查)
}
});
holder.itemDataBinding.checkBoxUser.setChecked(health.isChecked());
holder.itemDataBinding.checkTextUser.setText(health.getTitle());
}
@凌驾
public int getItemCount(){
返回healthList.size();
}
公共类ChoiceHolder扩展了RecyclerView.ViewHolder{
RowItemDataBinding itemDataBinding;
公共选项持有者(查看项目视图、行项目数据绑定数据绑定){
超级(项目视图);
itemDataBinding=数据绑定;
}
}
公共字符串getSelection(运行状况){
返回health.getTitle();
}
}
您可能需要查看关于如何为可检查微调器适配器执行此操作的答案。不完全一样,但你可能会有一些想法如果你想让我编辑你的代码,然后告诉我,但最好的方法是上面提到的。不,我的条件不同。我需要在关闭和重新打开alertdialog时处理检查。我还想用来自webservice的arraylist更新检查。条件是我想在关闭和重新打开时处理检查选择保持检查并用webservice更新检查
final CharSequence[] items = {" A "," B "," C "," D "};
final ArrayList seletedItems=new ArrayList();
AlertDialog dialog = new AlertDialog.Builder(this)
.setTitle("Select One")
.setMultiChoiceItems(items, null, new DialogInterface.OnMultiChoiceClickListener() {
@Override
public void onClick(DialogInterface dialog, int indexSelected, boolean isChecked) {
if (isChecked) {
seletedItems.add(indexSelected);
} else if (seletedItems.contains(indexSelected)) {
seletedItems.remove(Integer.valueOf(indexSelected));
}
}
}).setPositiveButton("OK", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int id) {
// Your code when user clicked on OK
}
}).setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int id) {
//todo
}
}).create();
dialog.show();
import android.annotation.SuppressLint;
import android.content.Context;
import android.databinding.DataBindingUtil;
import android.support.annotation.NonNull;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.CompoundButton;
import java.util.ArrayList;
import java.util.List;
public class classss extends RecyclerView.Adapter<ChoiceAdapter.ChoiceHolder> {
private Context context;
private List<Health> healthList;
public ChoiceAdapter(Context context, List<Health> healthList) {
this.context = context;
this.healthList = healthList;
}
public List<Health> getSelectedList() {
List<Health> selected = new ArrayList<>();
for (Health h : healthList) {
if (h.isChecked()) {
selected.add(h);
}
}
return selected;
}
@NonNull
@Override
public ChoiceHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
RowItemDataBinding dataBinding = DataBindingUtil.inflate(LayoutInflater.from(context),
R.layout.row_item_data, null, false);
ChoiceHolder holder = new ChoiceHolder(dataBinding.getRoot(), dataBinding);
return holder;
}
@Override
public void onBindViewHolder(@NonNull final ChoiceHolder holder, @SuppressLint("RecyclerView") final int position) {
Health health = healthList.get(position);
holder.itemDataBinding.checkBoxUser.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
health.setChecked(isChecked)
}
});
holder.itemDataBinding.checkBoxUser.setChecked(health.isChecked());
holder.itemDataBinding.checkTextUser.setText(health.getTitle());
}
@Override
public int getItemCount() {
return healthList.size();
}
public class ChoiceHolder extends RecyclerView.ViewHolder {
RowItemDataBinding itemDataBinding;
public ChoiceHolder(View itemView, RowItemDataBinding dataBinding) {
super(itemView);
itemDataBinding = dataBinding;
}
}
public String getSelection(Health health) {
return health.getTitle();
}
}