我对此很陌生,我有一个可能非常简单的问题。
我有 3 个微调器,我想根据用户对前一个微调器所做的选择,从数组中填充每个微调器。
现在我已将其设置为显示包含所选数据的 toast ,但我想设置一个 Activity 来打开,但那是稍后的事。现在我需要知道如何从 strings.xml 的数组中填充微调器。
.Java
import java.util.ArrayList;
import java.util.List;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.ArrayAdapter;
import android.widget.Spinner;
import android.widget.Toast;
/**
* @author madonk
*
*/
public class Region extends Activity {
Spinner sp1,sp2,sp3;
ArrayAdapter<String> reg_adp,sw_city_adp,sw_lake_charles_adp;
List<String> regions,sw_cities,sw_lake_charles;
int pos;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_region);
regions=new ArrayList<String>();
regions.add("Select a Region");
regions.add("Southwest");
sp1= (Spinner) findViewById(R.id.regions_spinner);
sp2= (Spinner) findViewById(R.id.sw_city_spinner);
sp3= (Spinner) findViewById(R.id.sw_lake_charles_spinner);
reg_adp=new ArrayAdapter<String> (this,android.R.layout.simple_dropdown_item_1line,regions);
reg_adp.setDropDownViewResource(android.R.layout.simple_dropdown_item_1line);
sp1.setAdapter(reg_adp);
sp1.setOnItemSelectedListener(new OnItemSelectedListener() {
public void onItemSelected(AdapterView<?> arg0, View arg1,
int arg2, long arg3) {
// TODO Auto-generated method stub
pos=arg2;
add();
}
private void add() {
// TODO Auto-generated method stub
Toast.makeText(getBaseContext(), ""+pos, Toast.LENGTH_SHORT).show();
switch(pos)
{
case 0:
sw_cities= new ArrayList<String>();
sw_cities.add("Select a City");
sw_city_adp=new ArrayAdapter<String>(Region.this,
android.R.layout.simple_dropdown_item_1line,sw_cities);
sw_city_adp.setDropDownViewResource(android.R.layout.simple_dropdown_item_1line);
sp2.setAdapter(sw_city_adp);
select();
break;
case 1:
sw_cities= new ArrayList<String>();
sw_cities.add("Select a City");
sw_cities.add("Lake Charles");
sw_cities.add("Iowa");
sw_cities.add("Lake Arthur");
sw_city_adp=new ArrayAdapter<String>(Region.this,
android.R.layout.simple_dropdown_item_1line,sw_cities);
sw_city_adp.setDropDownViewResource(android.R.layout.simple_dropdown_item_1line);
sp2.setAdapter(sw_city_adp);
select();
break;
}
}
private void select() {
// TODO Auto-generated method stub
sp2.setOnItemSelectedListener(new OnItemSelectedListener() {
public void onItemSelectedregions(AdapterView<?> arg0, View arg1,
int arg2, long arg3) {
// TODO Auto-generated method stub
}
public void onNothingSelected(AdapterView<?> arg0) {
// TODO Auto-generated method stub
}
public void onItemSelected(AdapterView<?> arg0, View arg1,
int arg2, long arg3) {
// TODO Auto-generated method stub
}
public void onNothingSelectedregions(AdapterView<?> arg0) {
// TODO Auto-generated method stub
}
});
}
public void onNothingSelectedcities(AdapterView<?> arg0) {
// TODO Auto-generated method stub
}
public void onNothingSelected(AdapterView<?> arg0) {
// TODO Auto-generated method stub
}
});
}
刺痛.xml
<resources>
<string name="app_name">Louisiana Festivals</string>
<string name="menu_settings">Settings</string>
<string name="title_activity_region">Select a Region</string>
<string-array name="regions_array">
<item >Southwest</item>
</string-array>
<string name="select_a_region">Select a Region</string>
<string-array name="southwest_cities">
<item >Lake Charles</item>
<item >Iowa</item>
</string-array>
<string name="sw_select_a_city">Select a City</string>
<string-array name="lake_charles">
<item>Contraband days Pirate Festival</item>
<item>Other festival to be determined</item>
</string-array>
</resources>
最佳答案
您可以使用 getStringArray() 从 strings.xml 获取字符串数组。所以你想要的代码 fragment 是:
String[] regionsArray = getResources().getStringArray(R.array.regions_array);
regions = new ArrayList<String>(Arrays.asList(regionsArray));
现在,您在 regions_array
中输入的任何内容都将最终出现在 ArrayList
区域中。
关于android - 从字符串数组填充微调器,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/11802775/