Android 选择项目后在listview中绘制屏幕顶部的微调器下拉列表
我想知道为什么ListView的布局\u height=“wrap\u content”会弄乱列表末尾的微调器。我在下面用了不同的方法来修复它。我希望有人能解释一下我的行为,或者指出我在绘制视图/ui事件方面缺乏哪些android知识 1) 从视觉上可以看到问题 2) 更改ListItem属性后Android 选择项目后在listview中绘制屏幕顶部的微调器下拉列表,android,listview,spinner,Android,Listview,Spinner,我想知道为什么ListView的布局\u height=“wrap\u content”会弄乱列表末尾的微调器。我在下面用了不同的方法来修复它。我希望有人能解释一下我的行为,或者指出我在绘制视图/ui事件方面缺乏哪些android知识 1) 从视觉上可以看到问题 2) 更改ListItem属性后 android:descendantFocusability="afterDescendants" 我的行为有所改善,但仍有一些事情发生。似乎列表中的项目没有接收到事件,所以属性更改对我来说是有意义的
android:descendantFocusability="afterDescendants"
我的行为有所改善,但仍有一些事情发生。似乎列表中的项目没有接收到事件,所以属性更改对我来说是有意义的。
更新该属性后微调器的行为。
除了我实际选择了一个项目外,其他都可以正常工作
3) 设置ListView的布局\u height=“match\u parent”后,在选择项目后,问题似乎消失了。为了那个视频
活动:
public class SelectorActivity extends Activity {
public static final String TAG = SelectorActivity.class.getSimpleName();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Log.v(TAG, "onCreate");
setContentView(R.layout.activity_selector);
LayoutInflater inflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
ListView contents = (ListView) findViewById(R.id.list_view);
contents.addHeaderView(new TestView(this));
contents.addFooterView(new View(this));
SimpleBaseAdapter listAdapter = new SimpleBaseAdapter(this);
// LOW RANGE
LinearLayout lowRange = (LinearLayout) inflater.inflate(R.layout.list_item_edit, null);
TextView lowRangeText = (TextView) lowRange.findViewById(R.id.text);
EditText lowRangeEditText = (EditText) lowRange.findViewById(android.R.id.edit);
// HIGH RANGE
LinearLayout highRange = (LinearLayout) inflater.inflate(R.layout.list_item_edit, null);
TextView highRangeText = (TextView) highRange.findViewById(R.id.text);
EditText highRangeEditText = (EditText) highRange.findViewById(android.R.id.edit);
// UNITS
LinearLayout units = (LinearLayout) inflater.inflate(R.layout.list_item_units, null);
TextView unitsText = (TextView) units.findViewById(android.R.id.text1);
// SPINNERS
LinearLayout spinners = (LinearLayout) inflater.inflate(R.layout.list_item_spinners, null);
Spinner spinner1 = (Spinner) spinners.findViewById(R.id.spinner1);
Spinner spinner2 = (Spinner) spinners.findViewById(R.id.spinner2);
Spinner spinner3 = (Spinner) spinners.findViewById(R.id.spinner3);
DebugAdapterViewListeners.set(spinner1, "spinner1");
// VIEW SETUP
lowRangeText.setText("text1");
highRangeText.setText("text2");
unitsText.setText("text3");
// SPINNER SETUP
String[] massUnits1 = new String[]{"one","two"};
String[] massUnits2 = new String[]{"three","four"};
String[] timeUnits = new String[]{"five","six"};
ArrayAdapter<String> adapt1 = new ArrayAdapter<String>(this, R.layout.spinner_list_item_centered);
ArrayAdapter<String> adapt2 = new ArrayAdapter<String>(this, R.layout.spinner_list_item_centered);
ArrayAdapter<String> adapt3 = new ArrayAdapter<String>(this, R.layout.spinner_list_item_centered);
adapt1.addAll(massUnits1);
adapt2.addAll(massUnits2);
adapt3.addAll(timeUnits);
spinner1.setAdapter(adapt1);
spinner2.setAdapter(adapt2);
spinner3.setAdapter(adapt3);
listAdapter.addView(lowRange);
listAdapter.addView(highRange);
listAdapter.addView(units);
listAdapter.addView(spinners);
contents.setAdapter(listAdapter);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.selector, menu);
return false;
}
}
公共类选择器活动扩展活动{
public static final String TAG=SelectorActivity.class.getSimpleName();
@凌驾
创建时受保护的void(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
Log.v(标记为“onCreate”);
setContentView(R.layout.activity_选择器);
LayoutFlater充气器=(LayoutFlater)getSystemService(Context.LAYOUT\u充气器\u服务);
ListView内容=(ListView)findViewById(R.id.list\u视图);
addHeaderView(新测试视图(this));
contents.addFooterView(新视图(此));
SimpleBaseAdapter listAdapter=新的SimpleBaseAdapter(此);
//低档
LinearLayout Low Range=(LinearLayout)充气器充气(R.layout.list\u item\u edit,null);
TextView lowRangeText=(TextView)lowRange.findViewById(R.id.text);
EditText lowRangeEditText=(EditText)lowRange.findViewById(android.R.id.edit);
//高射程
LinearLayout highRange=(LinearLayout)充气器充气(R.layout.list\u item\u edit,null);
TextView highRangeText=(TextView)highRange.findViewById(R.id.text);
EditText highRangeEditText=(EditText)highRange.findViewById(android.R.id.edit);
//单位
LinearLayout units=(LinearLayout)充气器充气(R.layout.list\u item\u units,空);
TextView unitsText=(TextView)units.findViewById(android.R.id.text1);
//纺纱机
LinearLayout微调器=(LinearLayout)充气器。充气(R.layout.list\u item\u微调器,null);
Spinner spinner1=(Spinner)spinners.findViewById(R.id.spinner1);
Spinner spinner2=(Spinner)spinners.findViewById(R.id.spinner2);
Spinner spinner3=(Spinner)spinners.findViewById(R.id.spinner3);
DebugAdapterViewListeners.set(喷丝头1,“喷丝头1”);
//视图设置
lowRangeText.setText(“text1”);
setText(“text2”);
unitsText.setText(“文本3”);
//微调器设置
字符串[]massUnits1=新字符串[]{“一”,“二”};
字符串[]massUnits2=新字符串[]{“三”,“四”};
字符串[]时间单位=新字符串[]{“五”,“六”};
ArrayAdapter Adapter 1=新的ArrayAdapter(此,R.layout.spinner\u列表\u项目\u居中);
ArrayAdapter Adapter 2=新的ArrayAdapter(此,R.layout.spinner\u列表\u项目\u居中);
ArrayAdapter Adapter 3=新的ArrayAdapter(此,R.layout.spinner\u列表\u项目\u居中);
自适应1.添加所有(质量单位1);
addAll(质量单位2);
ADADALL(时间单位);
喷丝头1.设置适配器(适配器1);
喷丝头2.设置适配器(适配器2);
喷丝头3.设置适配器(适配器3);
listAdapter.addView(低范围);
listAdapter.addView(高范围);
listAdapter.addView(单位);
addView(微调器);
contents.setAdapter(listAdapter);
}
@凌驾
公共布尔onCreateOptions菜单(菜单){
getMenuInflater().充气(右菜单选择器,菜单);
返回false;
}
}
以下是SimpleBaseAdapter类:
public class SimpleBaseAdapter extends BaseAdapter {
private ArrayList<View> views;
private Context context;
public SimpleBaseAdapter(Context context) {
this.context = context;
this.views = new ArrayList<View>();
}
public void addView(View view) {
this.views.add(view);
}
@Override
public int getCount() {
return views.size();
}
@Override
public Object getItem(int position) {
View view = views.get(position);
if (view instanceof AbsListView) {
return ((AbsListView)view).getItemAtPosition(position);
} else if (view instanceof AbsSpinner) {
return ((AbsSpinner)view).getItemAtPosition(position);
} else {
return null;
}
}
@Override
public long getItemId(int position) {
View view = views.get(position);
if (view instanceof AbsListView) {
return ((AbsListView)view).getItemIdAtPosition(position);
} else if (view instanceof AbsSpinner) {
return ((AbsSpinner)view).getItemIdAtPosition(position);
} else {
return 0;
}
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
return views.get(position);
}
}
公共类SimpleBaseAdapter扩展BaseAdapter{
私人ArrayList观点;
私人语境;
公共SimpleBaseAdapter(上下文){
this.context=上下文;
this.views=new ArrayList();
}
公共无效添加视图(视图){
this.views.add(视图);
}
@凌驾
public int getCount(){
返回视图。size();
}
@凌驾
公共对象getItem(int位置){
视图=视图。获取(位置);
if(查看AbsListView的实例){
return((AbsListView)视图).getItemAtPosition(位置);
}else if(查看AbsSpinner的实例){
返回((AbsSpinner)视图);
}否则{
返回null;
}
}
@凌驾
公共长getItemId(int位置){
视图=视图。获取(位置);
if(查看AbsListView的实例){
return((AbsListView)视图).getItemIDataPosition(位置);
}else if(查看AbsSpinner的实例){
返回((AbsSpinner)视图);
}否则{
返回0;
}
}
@凌驾
公共视图getView(int位置、视图转换视图、视图组父视图){
返回视图。获取(位置);
}
}
活动布局:
<LinearLayout 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:background="@color/green_1"
android:orientation="vertical"
>
<ListView
android:id="@+id/list_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:headerDividersEnabled="true"
android:footerDividersEnabled="true"
android:dividerHeight="0.5sp"
android:divider="@color/black"
android:clipToPadding="false"
android:layout_marginTop="18sp"
android:layout_marginBottom="18sp"
/>
</LinearLayout>
编辑列表项布局:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal"
android:padding="@dimen/row_padding"
android:background="@android:color/white"
>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/text"
android:layout_weight="50"
android:gravity="top"
android:textSize="@dimen/font_size_standard"
android:textColor="@drawable/selector_row_item_detail_text"
/>
<EditText
android:layout_width="0dip"
android:layout_height="wrap_content"
android:id="@android:id/edit"
android:layout_weight="50"
android:inputType="number"
android:gravity="right"
/>
</LinearLayout>
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/spinner_container"
android:orientation="horizontal"
android:background="@android:color/white"
android:paddingTop="@dimen/header_row_padding_vertical"
>
<Spinner
android:layout_width="0dip"
android:layout_height="wrap_content"
android:layout_weight="33"
android:id="@+id/spinner1"
android:gravity="center"
android:spinnerMode="dropdown"
/>
<Spinner
android:layout_width="0dip"
android:layout_height="wrap_content"
android:layout_weight="33"
android:id="@+id/spinner2"
android:gravity="center"
android:spinnerMode="dialog"
/>
<Spinner
android:layout_width="0dip"
android:layout_height="wrap_content"
android:layout_weight="33"
android:id="@+id/spinner3"
android:gravity="center"
android:spinnerMode="dialog"
/>
</LinearLayout>
微调器行项目布局:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal"
android:padding="@dimen/row_padding"
android:background="@android:color/white"
>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/text"
android:layout_weight="50"
android:gravity="top"
android:textSize="@dimen/font_size_standard"
android:textColor="@drawable/selector_row_item_detail_text"
/>
<EditText
android:layout_width="0dip"
android:layout_height="wrap_content"
android:id="@android:id/edit"
android:layout_weight="50"
android:inputType="number"
android:gravity="right"
/>
</LinearLayout>
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/spinner_container"
android:orientation="horizontal"
android:background="@android:color/white"
android:paddingTop="@dimen/header_row_padding_vertical"
>
<Spinner
android:layout_width="0dip"
android:layout_height="wrap_content"
android:layout_weight="33"
android:id="@+id/spinner1"
android:gravity="center"
android:spinnerMode="dropdown"
/>
<Spinner
android:layout_width="0dip"
android:layout_height="wrap_content"
android:layout_weight="33"
android:id="@+id/spinner2"
android:gravity="center"
android:spinnerMode="dialog"
/>
<Spinner
android:layout_width="0dip"
android:layout_height="wrap_content"
android:layout_weight="33"
android:id="@+id/spinner3"
android:gravity="center"
android:spinnerMode="dialog"
/>
</LinearLayout>
您应该扩展SpinnerAdapter而不是BaseAdapter。它有getDropdownView()和getView(),我相信它本身可以处理一些特殊情况。我正在android 4.2上以类似的布局扩展这个适配器,我看不出您有什么问题
我猜getDropdownView()处理将视图附加到根目录的方式的不同会导致这种差异,但我没有研究代码来检查这一点。您面临的问题是微调器的基本行为,因此需要修改微调器。这是微调器的代码,其初始ie。默认情况下,可视化为“选择项”(如果.xml中声明的提示类似于
android:prompt=“@string/Select Item”
)&下拉视图的大小与原始微调器相同。这种改进的微调器的局限性在于它不会
public class SelectorActivity extends Activity {
public static final String TAG = SelectorActivity.class.getSimpleName();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Log.v(TAG, "onCreate");
setContentView(R.layout.activity_selector);
LayoutInflater inflater = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);
ListView contents = (ListView) findViewById(R.id.list_view);
contents.addHeaderView(new TestView(this));
contents.addFooterView(new View(this));
SimpleBaseAdapter listAdapter = new SimpleBaseAdapter(this);
// LOW RANGE
LinearLayout lowRange = (LinearLayout) inflater.inflate(R.layout.list_item_edit, null);
TextView lowRangeText = (TextView) lowRange.findViewById(R.id.text);
EditText lowRangeEditText = (EditText) lowRange.findViewById(android.R.id.edit);
// HIGH RANGE
LinearLayout highRange = (LinearLayout) inflater.inflate(R.layout.list_item_edit, null);
TextView highRangeText = (TextView) highRange.findViewById(R.id.text);
EditText highRangeEditText = (EditText) highRange.findViewById(android.R.id.edit);
// UNITS
LinearLayout units = (LinearLayout) inflater.inflate(R.layout.list_item_units, null);
TextView unitsText = (TextView) units.findViewById(android.R.id.text1);
// SPINNERS
LinearLayout spinners = (LinearLayout) inflater.inflate(R.layout.list_item_spinners, null);
NoDefaultSpinner spinner1 = (NoDefaultSpinner) spinners.findViewById(R.id.spinner1);
NoDefaultSpinner spinner2 = (NoDefaultSpinner) spinners.findViewById(R.id.spinner2);
NoDefaultSpinner spinner3 = (NoDefaultSpinner) spinners.findViewById(R.id.spinner3);
DebugAdapterViewListeners.set(spinner1, "spinner1");
// VIEW SETUP
lowRangeText.setText("text1");
highRangeText.setText("text2");
unitsText.setText("text3");
// SPINNER SETUP
String[] massUnits1 = new String[]{"one","two"};
String[] massUnits2 = new String[]{"three","four"};
String[] timeUnits = new String[]{"five","six"};
ArrayAdapter<String> adapt1 = new ArrayAdapter<String>(this, R.layout.spinner_list_item_centered);
ArrayAdapter<String> adapt2 = new ArrayAdapter<String>(this, R.layout.spinner_list_item_centered);
ArrayAdapter<String> adapt3 = new ArrayAdapter<String>(this, R.layout.spinner_list_item_centered);
adapt1.addAll(massUnits1);
adapt2.addAll(massUnits2);
adapt3.addAll(timeUnits);
spinner1.setAdapter(adapt1);
spinner2.setAdapter(adapt2);
spinner3.setAdapter(adapt3);
listAdapter.addView(lowRange);
listAdapter.addView(highRange);
listAdapter.addView(units);
listAdapter.addView(spinners);
contents.setAdapter(listAdapter);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.selector, menu);
return false;
}