我很新的
android.我想在我的应用程序中使用2个旋转器,一个显示国家列表,当选择任何国家时,其他微调器应该显示该国家/地区的城市列表.当选择城市时,执行一些动作. plz帮我一些示例代码.感谢预期
解决方法
这里是我们可以用来添加spinner2 w.r.t到spinner 1的选项的东西.
public class Activity extends Activity implements View.OnClickListener
{
private Spinner spinner0,spinner1,spinner2,spinner3;
private Button submit,cancel;
private String country[],state[],city[],area[];
Australia aus = new Australia();
Object object;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
spinner0 = (Spinner)findViewById(R.id.spinnerCountry);
spinner1 = (Spinner)findViewById(R.id.spinnerQ1);
spinner2 = (Spinner)findViewById(R.id.spinnerQ2);
spinner3 = (Spinner)findViewById(R.id.spinnerQ3);
submit = (Button)findViewById(R.id.btnSubmit);
cancel = (Button)findViewById(R.id.btnCancel);
submit.setOnClickListener(this);
cancel.setOnClickListener(this);
country = new String[] {"Select Country","Australia","USA","UK","New Zealand","EU","Europe","China","Hong Kong","India","Malaysia","Canada","International","Asia","Africa"};
ArrayAdapter<String> adapter0 = new ArrayAdapter<String>(Activity.this,android.R.layout.simple_spinner_item,country);
adapter0.setDropDownViewResource(android.R.layout.simple_dropdown_item_1line);
spinner0.setAdapter(adapter0);
Log.i("AAA","spinner0");
spinner0.setOnItemSelectedListener(new OnItemSelectedListener()
{
@Override
public void onItemSelected(AdapterView<?> arg0,View view1,int pos,long id)
{
Log.i("AAA","OnItemSelected");
int loc;
loc = pos;
switch (loc)
{
case 1:
state = aus.getState();
object = aus;
Log.i("AAA","ArrayAdapter1");
ArrayAdapter<String> adapter1 = new ArrayAdapter<String>(Activity.this,state);
adapter1.setDropDownViewResource(android.R.layout.simple_dropdown_item_1line);
spinner1.setAdapter(adapter1); Log.i("AAA","spinner1");
break;
default:
Log.i("AAA","default 0");
break;
}
}
@Override
public void onNothingSelected(AdapterView<?> arg1)
{
Log.i("AAA","Nothing S0");
}
});
spinner1.setOnItemSelectedListener(new OnItemSelectedListener()
{
@Override
public void onItemSelected(AdapterView<?> arg0,long id)
{
Log.i("AAA","OnItemSelected S1");
int loc = pos;
switch(loc)
{
case 1:
Log.i("AAA","Australia");
if(object.equals(aus))
{
city = aus.getType(loc);
}
else
{
break;
}
ArrayAdapter<String> adapter = new ArrayAdapter<String>(Activity.this,city);
adapter.setDropDownViewResource(android.R.layout.simple_dropdown_item_1line);
spinner2.setAdapter(adapter); Log.i("AAA","spinner2");
break;
default:
Log.i("AAA","default 1");
break;
}
}
@Override
public void onNothingSelected(AdapterView<?> arg0)
{
Log.i("AAA","Nothing S1");
}
});
spinner2.setOnItemSelectedListener(new OnItemSelectedListener()
{
@Override
public void onItemSelected(AdapterView<?> arg0,View arg1,long id)
{
int loc = pos;
switch (loc)
{
case 1:
if(object.equals(aus))
{
area = aus.getTitle(loc);
}
ArrayAdapter<String> adapter = new ArrayAdapter<String>(Activity.this,area);
adapter.setDropDownViewResource(android.R.layout.simple_dropdown_item_1line);
spinner3.setAdapter(adapter); Log.i("","spinner3");
break;
default:
break;
}
}
@Override
public void onNothingSelected(AdapterView<?> arg0)
{
// TODO Auto-generated method stub
}
});
}// on-create
@Override
public void onClick(View v)
{
switch (v.getId())
{
case R.id.btnSubmit:
break;
case R.id.btnCancel:
finish();
break;
default:
break;
}
}
}
如果你觉得这很有用,那就放弃投票,让别人可以很容易地找到一个很好的答案.
对于每个国家,你必须为它创建一个课程,只需添加州,城市&区.这样一来,它就不会变成一个单一的网格.
玩的开心.
问候,
HAPS.
