当Spinner弹出对话框关闭时如何获取回调？

Question

当Spinner弹出对话框关闭时如何获取回调？

7

我有一个安卓的Spinner，希望在用户从弹出对话框中选择某项时获得回调。看起来setOnItemClickListener()或者setOnItemSelectedListener()是正确的方法，但是当我在spinner中选择一项时，它们都没有被调用。

是否有正确的方法可以做到这一点？

更新:

根据commonsware的建议，我做了以下操作，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
        }

    });

- emmby

1个回答

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原文链接

- CommonsWare · Accepted Answer

使用 setOnItemSelectedListener() 方法。以下是我一本书籍样例：

注：link1 需要添加超链接到相关书籍。

/***
    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("");
    }
}