7

我有一个 Android Spinner，当用户从其弹出对话框中选择某些内容时，我想得到一个回调。似乎setOnItemClickListener()或setOnItemSelectedListener()将是正确的使用方法，但是当我选择微调器中的一项时，它们都不会被调用。

有没有正确的方法来做到这一点？

更新

根据 commonsware 的建议，我做了以下事情，但我的onItemSelected()方法从未被调用：

    final Spinner spinner = (Spinner) findViewById(R.id.spinner);

    spinner.setAdapter( new ArrayAdapter<SettingValue>(getContext(), android.R.layout.simple_list_item_1, android.R.id.text1, setting.getSettingValues() ) );
    spinner.setOnItemSelectedListener( new OnItemSelectedListener() {

        public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
            Log.d("BOOGA");
            final SettingValue settingValue = (SettingValue)parent.getSelectedItem();
            final Editor edit = getContext().getSharedPreferences( PREFS_CONTEXT_NAME, Context.MODE_PRIVATE).edit();
            edit.putString(setting.name(), settingValue.name());
            edit.commit();
        }

        public void onNothingSelected(AdapterView<?> parent) {
            // do nothing
        }

    });
4

1 回答 1

1

使用setOnItemSelectedListener(). 这是我的书中示例之一：

/***
    Copyright (c) 2008-2009 CommonsWare, LLC

    Licensed under the Apache License, Version 2.0 (the "License"); you may
    not use this file except in compliance with the License. You may obtain
    a copy of the License at
        http://www.apache.org/licenses/LICENSE-2.0
    Unless required by applicable law or agreed to in writing, software
    distributed under the License is distributed on an "AS IS" BASIS,
    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    See the License for the specific language governing permissions and
    limitations under the License.
*/

package com.commonsware.android.selection;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Spinner;
import android.widget.TextView;

public class SpinnerDemo extends Activity
    implements AdapterView.OnItemSelectedListener {
    TextView selection;
    String[] items={"lorem", "ipsum", "dolor", "sit", "amet",
                    "consectetuer", "adipiscing", "elit", "morbi", "vel",
                    "ligula", "vitae", "arcu", "aliquet", "mollis",
                    "etiam", "vel", "erat", "placerat", "ante",
                    "porttitor", "sodales", "pellentesque", "augue", "purus"};

    @Override
    public void onCreate(Bundle icicle) {
        super.onCreate(icicle);
        setContentView(R.layout.main);
        selection=(TextView)findViewById(R.id.selection);

        Spinner spin=(Spinner)findViewById(R.id.spinner);
        spin.setOnItemSelectedListener(this);

        ArrayAdapter<String> aa=new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, items);

        aa.setDropDownViewResource(
            android.R.layout.simple_spinner_dropdown_item);
        spin.setAdapter(aa);
    }

    public void onItemSelected(AdapterView<?> parent, View v, int position, long id) {
        selection.setText(items[position]);
    }

    public void onNothingSelected(AdapterView<?> parent) {
        selection.setText("");
    }
}
于 2009-10-31T02:09:34.673 回答