Android 在ListActivity的底部显示两个按钮
我正在使用教程并成功地实现了一个代码来在扩展ListActivity的活动(以对话框的形式)中显示数据 尽管如此,我还是通过使用对话框主题以下面的格式获取数据 现在,我想知道,如何在底部添加两个按钮 就像我们通常在AlertDialog中看到的那样:确定并取消 CountrycodeActivity.java:Android 在ListActivity的底部显示两个按钮,android,listactivity,Android,Listactivity,我正在使用教程并成功地实现了一个代码来在扩展ListActivity的活动(以对话框的形式)中显示数据 尽管如此,我还是通过使用对话框主题以下面的格式获取数据 现在,我想知道,如何在底部添加两个按钮 就像我们通常在AlertDialog中看到的那样:确定并取消 CountrycodeActivity.java: public class CountrycodeActivity extends ListActivity { public static String RESULT_CON
public class CountrycodeActivity extends ListActivity {
public static String RESULT_CONTRYCODE = "countrycode";
public String[] countrynames, countrycodes;
private TypedArray imgs;
private List<Country> countryList;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
populateCountryList();
ArrayAdapter<Country> adapter = new CountryListArrayAdapter(this, countryList);
setListAdapter(adapter);
getListView().setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Country c = countryList.get(position);
Intent returnIntent = new Intent();
returnIntent.putExtra(RESULT_CONTRYCODE, c.getCode());
setResult(RESULT_OK, returnIntent);
imgs.recycle(); //recycle images
finish();
}
});
}
private void populateCountryList() {
countryList = new ArrayList<Country>();
countrynames = getResources().getStringArray(R.array.country_names);
countrycodes = getResources().getStringArray(R.array.country_codes);
imgs = getResources().obtainTypedArray(R.array.country_flags);
for(int i = 0; i < countrycodes.length; i++){
countryList.add(new Country(countrynames[i], countrycodes[i], imgs.getDrawable(i)));
}
}
public class Country {
private String name;
private String code;
private Drawable flag;
public Country(String name, String code, Drawable flag){
this.name = name;
this.code = code;
this.flag = flag;
}
public String getName() {
return name;
}
public Drawable getFlag() {
return flag;
}
public String getCode() {
return code;
}
}
}
public class CountryListArrayAdapter extends ArrayAdapter<CountrycodeActivity.Country> {
private final List<CountrycodeActivity.Country> list;
private final Activity context;
static class ViewHolder {
protected TextView name;
protected ImageView flag;
}
public CountryListArrayAdapter(Activity context, List<CountrycodeActivity.Country> list) {
super(context, R.layout.activity_countrycode_row, list);
this.context = context;
this.list = list;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View view = null;
if (convertView == null) {
LayoutInflater inflator = context.getLayoutInflater();
view = inflator.inflate(R.layout.activity_countrycode_row, null);
final ViewHolder viewHolder = new ViewHolder();
viewHolder.name = (TextView) view.findViewById(R.id.name);
viewHolder.flag = (ImageView) view.findViewById(R.id.flag);
view.setTag(viewHolder);
} else {
view = convertView;
}
ViewHolder holder = (ViewHolder) view.getTag();
holder.name.setText(list.get(position).getName());
holder.flag.setImageDrawable(list.get(position).getFlag());
return view;
}
}
公共类CountrycodeActivity扩展了ListActivity{
公共静态字符串结果\u CONTRYCODE=“countrycode”;
公共字符串[]国家名称、国家代码;
专用型Darray imgs;
私人名单国家名单;
@凌驾
创建时受保护的void(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
populateCountryList();
ArrayAdapter=新的CountryListArrayAdapter(此,countryList);
setListAdapter(适配器);
getListView().setOnItemClickListener(新的AdapterView.OnItemClickListener()){
@凌驾
public void onItemClick(AdapterView父对象、视图、整型位置、长id){
国家c=国家列表。获取(位置);
Intent returnIntent=新Intent();
returnIntent.putExtra(RESULT_CONTRYCODE,c.getCode());
setResult(结果正常,返回意图);
imgs.recycle();//回收图像
完成();
}
});
}
私有void populateCountryList(){
countryList=新的ArrayList();
countrynames=getResources().getStringArray(R.array.country_name);
countrycodes=getResources().getStringArray(R.array.country\u代码);
imgs=getResources().obtainTypedArray(R.array.country_flags);
对于(int i=0;i
countrylistarayadapter.java:
public class CountrycodeActivity extends ListActivity {
public static String RESULT_CONTRYCODE = "countrycode";
public String[] countrynames, countrycodes;
private TypedArray imgs;
private List<Country> countryList;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
populateCountryList();
ArrayAdapter<Country> adapter = new CountryListArrayAdapter(this, countryList);
setListAdapter(adapter);
getListView().setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Country c = countryList.get(position);
Intent returnIntent = new Intent();
returnIntent.putExtra(RESULT_CONTRYCODE, c.getCode());
setResult(RESULT_OK, returnIntent);
imgs.recycle(); //recycle images
finish();
}
});
}
private void populateCountryList() {
countryList = new ArrayList<Country>();
countrynames = getResources().getStringArray(R.array.country_names);
countrycodes = getResources().getStringArray(R.array.country_codes);
imgs = getResources().obtainTypedArray(R.array.country_flags);
for(int i = 0; i < countrycodes.length; i++){
countryList.add(new Country(countrynames[i], countrycodes[i], imgs.getDrawable(i)));
}
}
public class Country {
private String name;
private String code;
private Drawable flag;
public Country(String name, String code, Drawable flag){
this.name = name;
this.code = code;
this.flag = flag;
}
public String getName() {
return name;
}
public Drawable getFlag() {
return flag;
}
public String getCode() {
return code;
}
}
}
public class CountryListArrayAdapter extends ArrayAdapter<CountrycodeActivity.Country> {
private final List<CountrycodeActivity.Country> list;
private final Activity context;
static class ViewHolder {
protected TextView name;
protected ImageView flag;
}
public CountryListArrayAdapter(Activity context, List<CountrycodeActivity.Country> list) {
super(context, R.layout.activity_countrycode_row, list);
this.context = context;
this.list = list;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View view = null;
if (convertView == null) {
LayoutInflater inflator = context.getLayoutInflater();
view = inflator.inflate(R.layout.activity_countrycode_row, null);
final ViewHolder viewHolder = new ViewHolder();
viewHolder.name = (TextView) view.findViewById(R.id.name);
viewHolder.flag = (ImageView) view.findViewById(R.id.flag);
view.setTag(viewHolder);
} else {
view = convertView;
}
ViewHolder holder = (ViewHolder) view.getTag();
holder.name.setText(list.get(position).getName());
holder.flag.setImageDrawable(list.get(position).getFlag());
return view;
}
}
公共类CountryListArrayAdapter扩展了ArrayAdapter{
私人最终名单;
私人最终活动背景;
静态类视窗夹{
受保护的文本视图名称;
受保护的图像视图标志;
}
public CountryListArrayAdapter(活动上下文,列表){
超级(上下文、右布局、活动、国家代码行、列表);
this.context=上下文;
this.list=列表;
}
@凌驾
公共视图getView(int位置、视图转换视图、视图组父视图){
视图=空;
if(convertView==null){
LayoutInflater充气器=上下文。getLayoutInflater();
视图=充气机。充气(R.layout.activity\u countrycode\u行,空);
最终ViewHolder ViewHolder=新的ViewHolder();
viewHolder.name=(TextView)view.findViewById(R.id.name);
viewHolder.flag=(ImageView)view.findViewById(R.id.flag);
view.setTag(viewHolder);
}否则{
视图=转换视图;
}
ViewHolder=(ViewHolder)view.getTag();
holder.name.setText(list.get(position.getName());
setImageDrawable(list.get(position.getFlag());
返回视图;
}
}
在listview中添加这两行
android:layout_height="0sp"
android:layout_weight="1"
在listview下方添加此线性布局
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<Button
android:layout_width="0sp"
android:layout_weight="1"
android:layout_height="wrap_content" />
<Button
android:layout_width="0sp"
android:layout_weight="1"
android:layout_height="wrap_content" />
</LinearLayout>
由于您似乎正在使用对话框
界面,您可以设置正按钮
和设置负按钮
并相应地设置单击侦听器。不,如果将其放在列表视图的“下方”,则不会。将其添加到列表视图下方而不是列表项XML我没有在XML中单独使用任何列表视图,检查此代码,您将更清楚地了解我的代码的当前结构: