Question

我知道如何自定义微调器。就我而言，它有点不同。我现在无法修改我的代码。通常，我可以创建可从我的应用程序中的所有活动访问的微调器。我试图将文本视图中的图标放在微调器下拉列表中。这是我的代码;

Spinner.xml

 <?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="fill_parent" >

<Spinner
    android:id="@+id/spinner"
    android:layout_width="150dp"
    android:layout_height="wrap_content"
    android:drawSelectorOnTop="true"
    android:spinnerMode="dialog"
    android:prompt="@string/language_prompt" />

spinner_row.xml

<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/TextView01"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:addStatesFromChildren="true"
android:gravity="center_horizontal"
android:padding="5dp"
android:textColor="#FFFFFF"
android:textSize="17sp" >
 </TextView>

 <!-- Here I cannot use Relative layout. If I use it gives error like [java.lang.ClassCastException: android.widget.ImageView cannot be cast to android.widget.TextView]. Without layout I cannot implement ImageView. I am stuck here.

我的活动课程;

public class Base_Activity extends Activity {

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    getMenuInflater().inflate(R.menu.main, menu);
    //int flags = R.array.flags;

    final Spinner spinner = (Spinner) menu.getItem(0).getActionView()
            .findViewById(R.id.spinner);

    ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(
            this, R.array.languages, R.layout.spinner_row);

    spinner.setAdapter(adapter);

    spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {

我想要的是自定义适配器，以便我可以将文本视图放在微调器列表中。我无法以正常的方式检查我在许多教程中查看过的内容。我认为这是因为我在onCreateOptionsMenu（）构造函数中创建了微调器。

Answer 1

你可以看看这个tutorial on AndroidHive

http://www.androidhive.info/2013/11/android-working-with-action-bar/

代码段

// Spinner title navigation data
        navSpinner = new ArrayList<SpinnerNavItem>();
        navSpinner.add(new SpinnerNavItem("Local", R.drawable.ic_location));
        navSpinner
                .add(new SpinnerNavItem("My Places", R.drawable.ic_my_places));
        navSpinner.add(new SpinnerNavItem("Checkins", R.drawable.ic_checkin));
        navSpinner.add(new SpinnerNavItem("Latitude", R.drawable.ic_latitude));

        // title drop down adapter
        adapter = new TitleNavigationAdapter(getApplicationContext(),
                navSpinner);

来自getView()

的

getDropDownView()和TitleNavigationAdapter

public View getView(int position, View convertView, ViewGroup parent) { 
        if (convertView == null) {
            LayoutInflater mInflater = (LayoutInflater)
                    context.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
            convertView = mInflater.inflate(R.layout.list_item_title_navigation, null);
        }

        imgIcon = (ImageView) convertView.findViewById(R.id.imgIcon);
        txtTitle = (TextView) convertView.findViewById(R.id.txtTitle);

        imgIcon.setImageResource(spinnerNavItem.get(position).getIcon());
        imgIcon.setVisibility(View.GONE);
        txtTitle.setText(spinnerNavItem.get(position).getTitle());
        return convertView;
    }


    @Override
    public View getDropDownView(int position, View convertView, ViewGroup parent) {
        if (convertView == null) {
            LayoutInflater mInflater = (LayoutInflater)
                    context.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
            convertView = mInflater.inflate(R.layout.list_item_title_navigation, null);
        }

        imgIcon = (ImageView) convertView.findViewById(R.id.imgIcon);
        txtTitle = (TextView) convertView.findViewById(R.id.txtTitle);

        imgIcon.setImageResource(spinnerNavItem.get(position).getIcon());        
        txtTitle.setText(spinnerNavItem.get(position).getTitle());
        return convertView;
    }

下载该代码，并且很高兴

自定义菜单或操作栏中的微调器

1 个答案: