Android - 使用自定义 ArrayAdapter 获取 ListView 的每个 EditTexts 值 [英] Android - Get each EditTexts values of ListView with custom ArrayAdapter
本文介绍了Android - 使用自定义 ArrayAdapter 获取 ListView 的每个 EditTexts 值的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我有一个带有客户 ArrayAdapter 和自定义 ListItem-XML 的 ListView.在这个 ListView 的底部，我添加了一个带有 Button 的 FooterView.现在，当我单击此按钮时，我想获取每个 ListItem 中三个 EditText 的所有值.
I've got a ListView with a customer ArrayAdapter and a custom ListItem-XML. At the bottom of this ListView I've added a FooterView with a Button. Now I want to get all the values of the three EditTexts in each of my ListItems when I click this Button.
这是我的代码:
activity_checklistresult.xml:
activity_checklistresult.xml:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ListView
android:id="@android:id/list"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</RelativeLayout>
result_inner_view.xml:
result_inner_view.xml:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/item_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:gravity="center">
<TextView
android:id="@+id/tv_result_amount"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="@dimen/default_margin" />
<EditText
android:id="@+id/et_result_amount"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="@dimen/default_margin"
android:inputType="number" />
<LinearLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="center_vertical"
android:orientation="vertical">
<TextView
android:id="@+id/tv_result_product_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:singleLine="true"
android:ellipsize="end"
android:layout_margin="@dimen/default_margin" />
<AutoCompleteTextView
android:id="@+id/actv_search_product"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:singleLine="true"
android:ellipsize="end"
android:layout_margin="@dimen/default_margin"
android:inputType="textAutoComplete" />
</LinearLayout>
<TextView
android:id="@+id/tv_result_price"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="@dimen/default_margin" />
<EditText
android:id="@+id/et_result_price"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="@dimen/default_margin"
android:inputType="numberDecimal" />
</LinearLayout>
ResultListActivity.java:
ResultListActivity.java:
public class ChecklistResultActivity extends ListActivity
{
private MyResultAdapter adapt;
private Button confirmButton;
private ChecklistResultActivity rActivity;
@Override
public void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_checklistresult);
// Set my Custom ArrayAdapter for this ListActivity
setAdapter();
rActivity = this;
}
private void setAdapter(){
adapt = new MyResultAdapter(this, R.layout.result_inner_view, Controller.getInstance().getOrderedProducts());
setListAdapter(adapt);
// Add the confirm button at the end of the list
addFooterConfirmButton();
}
private void addFooterConfirmButton(){
ListView lv = (ListView)findViewById(android.R.id.list);
FrameLayout footerLayout = (FrameLayout) getLayoutInflater().inflate(R.layout.result_footer_view, null);
confirmButton = (Button)footerLayout.findViewById(R.id.confirm_result_button);
confirmButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
...
// Get all EditText values (and compare them with the Default Value)
}
});
lv.addFooterView(footerLayout);
}
...
MyResultAdapter.java:
MyResultAdapter.java:
public class MyResultAdapter extends ArrayAdapter<OrderedProduct>
{
private Context context;
private int layoutResourceId;
private LayoutInflater inflater;
public MyResultAdapter(Context c, int layoutResourceId, List<OrderedProduct> objects){
super(c, layoutResourceId, objects);
this.layoutResourceId = layoutResourceId;
this.context = c;
inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
@Override
public View getView(int position, View convertView, ViewGroup parent){
View view = convertView;
if(view == null)
view = inflater.inflate(layoutResourceId, parent, false);
...
return view;
}
}
在 //的 ResultListActivity 中获取所有 EditText 值(并将它们与默认值进行比较) 我想遍历所有 OrderedProducts 并比较这些默认值，并使用新的填充值 -在两个 EditTexts 和 AutoCompleteTextView 的值中.那么如何从页脚按钮的 onClick 中获取这些值?
In the ResultListActivity at // Get all EditText values (and compare them with the Default Value) I want to loop through all the OrderedProducts and compare the default values of those, with the new filled-in values of the two EditTexts and the AutoCompleteTextView. So how can I get those values from within the onClick of the Footer-Button?
预先感谢您的回复.
推荐答案
您的适配器必须为每个创建的 EditText 保存更改文本:
Your adapter has to save text on change for each created EditText :
- 创建地图以保存值
- 为每个 EditText 定义和设置一个通用的 TextWatcher
- 在 editText 上设置一个标签(使用它的位置或任何id 你想要)我们将使用这个标签作为 hashMap 中的键
- 创建一个方法来检索给定
EditText的值
适配器:
public class MyResultAdapter extends ArrayAdapter<OrderedProduct>
{
...
private HashMap<String, String> textValues = new HashMap<String, String>();
...
public ViewView getView(int position, View convertView, ViewGroup parent){
View view = convertView;
boolean convertViewWasNull = false;
if(view == null){
view = inflater.inflate(layoutResourceId, parent, false);
convertViewWasNull = true;
}
myEditText1 = findViewById...
myEditText2 = findViewById...
if(convertViewWasNull ){
//be aware that you shouldn't do this for each call on getView, just once by listItem when convertView is null
myEditText1.addTextChangedListener(new GenericTextWatcher(myEditText1));
myEditText2.addTextChangedListener(new GenericTextWatcher(myEditText2));
}
//whereas, this should be called on each getView call, to update view tags.
myEditText1.setTag("theFirstEditTextAtPos:"+position);
myEditText2.setTag("theSecondEditTextAtPos:"+position);
}
private class GenericTextWatcher implements TextWatcher{
private View view;
private GenericTextWatcher(View view) {
this.view = view;
}
public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {}
public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {}
public void afterTextChanged(Editable editable) {
String text = editable.toString();
//save the value for the given tag :
MyResultAdapter.this.textValues.put(view.getTag(), editable.toString());
}
}
//you can implement a method like this one for each EditText with the list position as parameter :
public String getValueFromFirstEditText(int position){
//here you need to recreate the id for the first editText
String result = textValues.get("theFirstEditTextAtPos:"+position);
if(result ==null)
result = "default value";
return result;
}
public String getValueFromSecondEditText(int position){
//here you need to recreate the id for the second editText
String result = textValues.get("theSecondEditTextAtPos:"+position);
if(result ==null)
result = "default value";
return result;
}
}
这篇关于Android - 使用自定义 ArrayAdapter 获取 ListView 的每个 EditTexts 值的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
查看全文
