我就是这样做的。
I used XmlPullParserFactory to get the tags from an xml file in the assets folder.
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XmlPullParser 的事件
XMLPullParser的next()方法将光标指针移动到下一个事件。通常，我们使用 XMLPullParser 接口中定义的四个常量（作为事件工作）。这些都是：
START_TAG:读取了一个 XML 开始标签。
TEXT:文本内容被读取；可以使用 getText() 方法检索文本内容。
END_TAG: 读取了结束标签。
END_DOCUMENT: 没有更多活动可用。
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Android XMLPullParser XML 解析
将XMLPullParser检查带有一系列事件的 XML 文件，例如上面列出的用于解析 XML 文档的事件。
要在android 中使用XMLPullParser 读取和解析XML 数据，我们需要在android 应用程序中创建XMLPullParserFactory、XMLPullParser 对象的实例。
下面是我在使用 XMLPullParserFactory、XMLPullParser 和一系列事件从 XML 对象获取所需信息的 Android 应用程序中使用 XMLPullParser 读取和解析 XML 数据的代码。
然后将数据传递到 BaseAdapter。
package com.f.countryarraytest;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.TextView;
import android.widget.Toast;
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;
import org.xmlpull.v1.XmlPullParserFactory;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.HashMap;
public class MainActivity extends AppCompatActivity {
private ListView listView;
public TextView tvCountryName, tvCountryCode, tvCountryIso2;
private CustomAdapter customAdapter;
private static final String tagCountryItem = "country";
private static final String tagCountryName = "countryName";
private static final String tagCountryCode = "countryCode";
private static final String tagCountryIso2 = "countryIso2";
private static final String tagCountryIso3 = "countryIso3";
private ArrayList<String> countryName, countryCode, countryIso2, countryIso3;
private ArrayList<HashMap<String, String>> countryListArray;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
listView = findViewById(R.id.listView);
tvCountryName = findViewById(R.id.tvMainActivity_CountryName);
tvCountryCode = findViewById(R.id.tvMainActivity_CountryCode);
tvCountryIso2 = findViewById(R.id.tvMainActivity_CountryIso2);
countryName = new ArrayList<>();
countryCode = new ArrayList<>();
countryIso2 = new ArrayList<>();
countryIso3 = new ArrayList<>();
try{
countryListArray = new ArrayList<>();
HashMap<String,String> country = new HashMap<>();
InputStream inputStream = getAssets().open("countries.xml");
XmlPullParserFactory parserFactory = XmlPullParserFactory.newInstance();
parserFactory.setNamespaceAware(true);
XmlPullParser parser = parserFactory.newPullParser();
parser.setFeature(XmlPullParser.FEATURE_PROCESS_NAMESPACES,false);
parser.setInput(inputStream,null);
String tag = "" , text = "";
int event = parser.getEventType();
while (event!= XmlPullParser.END_DOCUMENT){
tag = parser.getName();
switch (event){
case XmlPullParser.START_TAG:
if(tag.equals(tagCountryItem))
country = new HashMap<>();
break;
case XmlPullParser.TEXT:
text=parser.getText();
break;
case XmlPullParser.END_TAG:
if (tag.equalsIgnoreCase(tagCountryName)){
country.put(tagCountryName,text);
} else if (tag.equalsIgnoreCase(tagCountryCode)){
country.put(tagCountryCode,text);
} else if (tag.equalsIgnoreCase(tagCountryIso2)){
country.put(tagCountryIso2,text);
} else if (tag.equalsIgnoreCase(tagCountryIso3)){
country.put(tagCountryIso3,text);
} else if (tag.equalsIgnoreCase(tagCountryItem)){
if(country != null){
countryListArray.add(country);
}
}
/*switch (tag){
case tagCountryName: country.put(tagCountryName,text);
break;
case tagCountryCode: country.put(tagCountryCode,text);
break;
case tagCountryIso2: country.put(tagCountryIso2,text);
break;
case tagCountryIso3: country.put(tagCountryIso3,text);
break;
case tagCountryItem:
if(country != null){
countryListArray.add(country);}
break;
}*/
break;
}
event = parser.next();
}
//Get ArrayList With County Data HashMap
getHashMapData();
customAdapter = new CustomAdapter(this, countryName, countryCode, countryIso2, countryIso3);
listView.setAdapter(customAdapter);
}
catch (IOException e) {
e.printStackTrace();
} catch (XmlPullParserException e) {
e.printStackTrace();
}
}
private void getHashMapData(){
countryName.clear();
countryCode.clear();
countryIso2.clear();
countryIso3.clear();
try {
if (countryListArray.size() > 0) {
for (int i = 0; i < countryListArray.size(); i++) {
HashMap<String, String> hashmap = countryListArray.get(i);
countryName.add(hashmap.get(tagCountryName));
countryCode.add(hashmap.get(tagCountryCode));
countryIso2.add(hashmap.get(tagCountryIso2));
countryIso3.add(hashmap.get(tagCountryIso3));
}
}
} catch (Exception e){}
}
}
这是我的 BaseAdapter 的代码。
package com.f.countryarraytest;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;
import java.util.ArrayList;
import java.util.HashMap;
public class CustomAdapter extends BaseAdapter {
private Context context;
private ArrayList<String> countryName, countryCode, countryIso2, countryIso3;
private LayoutInflater layoutInflater;
private TextView tvSelectedCountryName, tvSelectedCountryCode, tvSelectedCountryIso2;
public CustomAdapter(MainActivity mainActivity, ArrayList<String> countryName, ArrayList<String> countryCode, ArrayList<String> countryIso2, ArrayList<String> countryIso3){
this.context = mainActivity.getApplicationContext();
this.countryName = countryName;
this.countryCode = countryCode;
this.countryIso2 = countryIso2;
this.countryIso3 = countryIso3;
this.layoutInflater = (LayoutInflater) this.context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
this.tvSelectedCountryName = mainActivity.tvCountryName;
this.tvSelectedCountryCode = mainActivity.tvCountryCode;
this.tvSelectedCountryIso2 = mainActivity.tvCountryIso2;
}
@Override
public int getCount() {
return countryName.size();
}
@Override
public Object getItem(int position) {
return position;
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
if(convertView == null)
{
convertView = layoutInflater.inflate(R.layout.custom_listview_country_picker, null);
}
LinearLayout llItem;
final TextView tvCountryName, tvCountryCode, tvCountryIso2;
llItem = convertView.findViewById(R.id.llCountryPicker);
tvCountryName = convertView.findViewById(R.id.tvCountryName);
tvCountryCode = convertView.findViewById(R.id.tvCountryCode);
tvCountryIso2 = convertView.findViewById(R.id.tvCountryIso2);
//Set Values
tvCountryName.setText(countryName.get(position));
tvCountryCode.setText(String.valueOf(countryCode.get(position)));
tvCountryIso2.setText(countryIso2.get(position));
llItem.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
tvSelectedCountryName.setText(tvCountryName.getText().toString().trim());
tvSelectedCountryCode.setText(tvCountryCode.getText().toString().trim());
tvSelectedCountryIso2.setText(tvCountryIso2.getText().toString().trim());
}
});
return convertView;
}
}
这是列表项的 xml 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:background="#ffffff"
android:orientation="horizontal">
<LinearLayout
android:layout_width="match_parent"
android:orientation="horizontal"
android:id="@+id/llCountryPicker"
android:gravity="center_vertical"
android:layout_height="wrap_content">
<!--Country Flag-->
<ImageView
android:layout_width="28dp"
android:padding="2dp"
android:contentDescription="countryFlag"
android:src="@android:drawable/ic_menu_gallery"
android:id="@+id/ivCountryPicker_CountryFlag"
android:layout_marginStart="10dp"
android:layout_height="28dp"
/>
<!-- Country Code And Name -->
<LinearLayout
android:layout_width="match_parent"
android:orientation="vertical"
android:layout_marginTop="5dp"
android:layout_height="wrap_content">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<TextView
android:id="@+id/tvCountryIso2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="10dp"
android:singleLine="true"
android:textColorHint="#000"
android:layout_marginEnd="10dp"
android:hint="Iso2"
android:textColor="#000000"
android:textSize="14dp"
/>
<TextView
android:id="@+id/tvCountryName"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:singleLine="true"
android:textColorHint="#000"
android:layout_marginEnd="10dp"
android:hint="country Name"
android:textColor="#000000"
android:textSize="14dp"
/>
</LinearLayout>
<TextView
android:id="@+id/tvCountryCode"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="10dp"
android:singleLine="true"
android:minEms="3"
android:textColorHint="#000"
android:maxEms="5"
android:layout_marginEnd="10dp"
android:hint="000"
android:textColor="#000000"
android:textSize="14dp"
/>
</LinearLayout>
</LinearLayout>