我可以让两个不同的源将数据传递给数组适配器吗？答案

【问题标题】：Can I have two different sources pass data to an array adapter?我可以让两个不同的源将数据传递给数组适配器吗？
【发布时间】：2012-07-25 18:48:20
【问题描述】：

我正在尝试将来自两个不同来源的数据添加到数组适配器。一个来源来自包含硬编码字符串的微调器，另一个来源是允许用户创建自己的字符串以传递给数组（通过适配器）。下面是我的代码。在我看来，数组适配器根据可以传递给它的参数只能排除一个数据源......即

ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource
(this, R.array.alarmList, android.R.layout.simple_spinner_item );

这里我只能猜测实际的字符串输入是从...... android.R.layout.simple_spinner_item 收集的我是否需要使用另一个数组适配器，或者有没有办法将我的字符串变量添加到适配器以及用户从微调器中选择的项目？我在这里做了一些研究，但画了一个空白！非常感谢。这是我的代码，它尝试向适配器输入字符串............

public class NewAlarm extends Activity {

Spinner alarms;
//private Button b =  (Button) findViewById(R.id.btnAddCustom);
final EditText et =  (EditText) findViewById(R.id.edittext);

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.newalarm);
    ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(this, R.array.alarmList, android.R.layout.simple_spinner_item );
    adapter.setDropDownViewResource( android.R.layout.simple_spinner_dropdown_item );
    //et.setText("name");
    alarms = (Spinner) findViewById(R.id.cmbAlarms);
    alarms.setAdapter(adapter);
}

public void addAlarm(View view) {
    MainMenu.alarmList.add(new Alarm(alarms.getSelectedItem().toString()));
    Toast.makeText(getApplicationContext(), "Added " +      alarms.getSelectedItem().toString() + " alarm.", Toast.LENGTH_SHORT).show();
    NewAlarm.this.finish();
}

public void addCustomAlarm (View view){

    MainMenu.alarmList.add(new Alarm(et.getText().toString())); 
}

}

这是我的数组适配器代码............

  public View getView(final int position, View convertView, ViewGroup viewGroup) {
      if (convertView == null) {
          LayoutInflater inflater = (LayoutInflater)     context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
          convertView = inflater.inflate(R.layout.alarm_item, null);
      }

谢谢大家！！

      // Get a handle on the UI controls
      TextView name = (TextView) convertView.findViewById(R.id.txtAlarmName);
      final TextView timeStamp = (TextView) convertView.findViewById(R.id.txtTimeStamp);
      // if the value of the timestamp from the alarm at the position selected is not a null value then set the text label to the alarm timestamp value
      if (MainMenu.alarmList.get(position).getTimeStamp() != null)
          {
            timeStamp.setText(MainMenu.alarmList.get(position).getTimeStamp().toString());
          }
      // Set the alarm name 
      name.setText(listItems.get(position).getName());
      // Get a handle on the button
      Button btnCheckNow = (Button) convertView.findViewById(R.id.btnCheckNow);

      btnCheckNow.setOnClickListener(new OnClickListener() {
          public void onClick(View view) {
              // Set the timestamp of the alarm object at the selected position
              MainMenu.alarmList.get(position).setTimeStamp();
              // Set the timestamp label 
              timeStamp.setText(MainMenu.alarmList.get(position).getTimeStamp().toString());
             }
      });
      return convertView;
}

【问题讨论】：

标签： android arrays input adapter

【解决方案1】：

不要调用ArrayAdapter.createFromResource()，而是在创建适配器之前导入数组并添加字符串：

CharSequence[] array = Arrays.asList(
        getResources().getTextArray(R.array.alarmList));
List<CharSequence> list = new ArrayList<CharSequence>(array);

list.add("custom string");

ArrayAdapter<CharSequence> adapter = new ArrayAdapter<CharSequence>(this, 
        android.R.layout.simple_spinner_item, list);

【讨论】：