我正在尝试在我的视图上使用 2 个微调器，目前正在实施“OnItemSelected”方法。我设置了一个 switch 语句来区分微调器，但由于某种原因它似乎不起作用。
这是我的代码：
import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.Spinner;
import android.widget.TextView;
import android.widget.Toast;
import java.util.List;
import java.util.ArrayList;
import android.widget.AdapterView.OnItemSelectedListener;
/**
* This is the activity for feature 1 in the dashboard application.
* It displays some text and provides a way to get back to the home activity.
*
*/
public class F1Activity extends DashboardActivity implements OnItemSelectedListener
{
/**
* onCreate
*
* Called when the activity is first created.
* This is where you should do all of your normal static set up: create views, bind data to lists, etc.
* This method also provides you with a Bundle containing the activity's previously frozen state, if there was one.
*
* Always followed by onStart().
*
* @param savedInstanceState Bundle
*/
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView (R.layout.activity_f1);
setTitleFromActivityLabel (R.id.title_text);
//declaring variables
Button submitButton = (Button) findViewById(R.id.button1);
Button cancelButton = (Button) findViewById(R.id.button2);
//getting arrays from strings file
String[] regions = getResources().getStringArray(R.array.regions_array);
String[] grids = getResources().getStringArray(R.array.grids_array);
Spinner gridSpinner = (Spinner) findViewById(R.id.gridSpinner);
Spinner regionSpinner = (Spinner) findViewById(R.id.regionSpinner);
//creating adapters for both spinners
ArrayAdapter<String> dataAdapter =
new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, grids);
ArrayAdapter<String> regionAdapter =
new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, regions);
// drop down layout style with radio button type.
dataAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
regionAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
// attaching data adapters to spinners
gridSpinner.setAdapter(dataAdapter);
regionSpinner.setAdapter(regionAdapter);
gridSpinner.setOnItemSelectedListener(this);
regionSpinner.setOnItemSelectedListener(this);
submitButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View view){
Intent changeAdd = new Intent();
setResult(RESULT_OK, changeAdd);
EditText nameText = (EditText) findViewById(R.id.nameTextBox);
EditText passText = (EditText) findViewById(R.id.passwordTextBox);
if(nameText.getText().toString().length() > 0 &&
passText.getText().toString().length() > 0) //TAKE CARE OF LISRVIEW/DROPDOWN
{
Toast.makeText(getApplicationContext(),
"Loading...", Toast.LENGTH_LONG).show();
// make an intent to start the virtual world activity..................like in addGridActivity/screen switch!
finish();
}
else
{
Toast.makeText(getApplicationContext(), "Sorry, you have to complete all the fields",
Toast.LENGTH_SHORT).show();
}
}
});
cancelButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View view){
Intent changeAdd = new Intent();
setResult(RESULT_OK, changeAdd);
// cancelled and went back to home screen
finish();
}
});
}
@Override
public void onItemSelected(AdapterView<?> parent, View view, int pos, long arg3) {
// to handle the selection of the gridSpinner or the regionSpinner
int id = parent.getId();
switch(id)
{
case R.id.gridSpinner:
Toast.makeText(parent.getContext(), "you selected" +
parent.getItemAtPosition(pos).toString() + "from the grid spinner", Toast.LENGTH_LONG);
break;
case R.id.regionSpinner:
Toast.makeText(parent.getContext(), "you selected" +
parent.getItemAtPosition(pos).toString() + "from the region spinner", Toast.LENGTH_LONG);
break;
default:
break;
}
}
@Override
public void onNothingSelected(AdapterView<?> arg0) {
// TODO Auto-generated method stub
}
} // end class
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