MenuItemでICSスタイルのスピナーを使用するソリューションを作成しました。AndroidサポートライブラリにはSpinnerICSウィジェットがあり、リストナビゲーションモードで使用されますが、直接使用できないように内部化することにしました。私の解決策は、リフレクションを介してSpinnerICSウィジェットにアクセスすることです。
最初にSpinnerICS.javaを作成します。
package com.example.widget;
import java.lang.reflect.Constructor;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;
import android.content.Context;
import android.util.AttributeSet;
import android.view.View;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.Spinner;
import android.widget.SpinnerAdapter;
public class SpinnerICS
{
private Spinner spinner = null;
private View spinnerICS = null;
private Method setAdapterICS = null;
private Method setSelectionICS = null;
private Method getAdapterICS = null;
private Method getSelectedItemPositionICS = null;
private Method getSelectedItemICS = null;
private Class<?> OnItemSelectedListenerICS = null;
private Method setOnItemSelectedListenerICS = null;
public SpinnerICS(Context context)
{
if (android.os.Build.VERSION.SDK_INT < android.os.Build.VERSION_CODES.ICE_CREAM_SANDWICH) {
try {
Class<?> c = Class.forName("android.support.v7.internal.widget.SpinnerICS");
Constructor<?> ctor = c.getDeclaredConstructor(Context.class, AttributeSet.class, int.class);
ctor.setAccessible(true);
setAdapterICS = c.getMethod("setAdapter", SpinnerAdapter.class);
setSelectionICS = c.getMethod("setSelection", int.class);
getAdapterICS = c.getMethod("getAdapter");
getSelectedItemPositionICS = c.getMethod("getSelectedItemPosition");
getSelectedItemICS = c.getMethod("getSelectedItem");
OnItemSelectedListenerICS = Class.forName("android.support.v7.internal.widget.AdapterViewICS$OnItemSelectedListener");
setOnItemSelectedListenerICS = c.getMethod("setOnItemSelectedListener", OnItemSelectedListenerICS);
spinnerICS = (View)ctor.newInstance(context, null, android.support.v7.appcompat.R.attr.actionDropDownStyle);
} catch (Exception e) {
e.printStackTrace();
}
}
if (spinnerICS == null) {
spinner = new Spinner(context);
}
}
public View getView()
{
return (spinnerICS != null ? spinnerICS : spinner);
}
public void setAdapter(SpinnerAdapter adapter)
{
if (spinnerICS != null) {
try {
setAdapterICS.invoke(spinnerICS, adapter);
} catch (Exception e) {
e.printStackTrace();
}
} else if (spinner != null) {
spinner.setAdapter(adapter);
}
}
public void setSelection(int position)
{
if (spinnerICS != null) {
try {
setSelectionICS.invoke(spinnerICS, position);
} catch (Exception e) {
e.printStackTrace();
}
} else if (spinner != null) {
spinner.setSelection(position);
}
}
public SpinnerAdapter getAdapter()
{
if (spinnerICS != null) {
try {
return (SpinnerAdapter)getAdapterICS.invoke(spinnerICS);
} catch (Exception e) {
e.printStackTrace();
}
} else if (spinner != null) {
return spinner.getAdapter();
}
return null;
}
public int getSelectedItemPosition()
{
if (spinnerICS != null) {
try {
return (Integer)getSelectedItemPositionICS.invoke(spinnerICS);
} catch (Exception e) {
e.printStackTrace();
}
} else if (spinner != null) {
return spinner.getSelectedItemPosition();
}
return -1;
}
public Object getSelectedItem()
{
if (spinnerICS != null) {
try {
return getSelectedItemICS.invoke(spinnerICS);
} catch (Exception e) {
e.printStackTrace();
}
} else if (spinner != null) {
return spinner.getSelectedItem();
}
return null;
}
public class OnItemSelectedListenerProxyListener implements java.lang.reflect.InvocationHandler
{
private OnItemSelectedListener listener;
public OnItemSelectedListenerProxyListener(OnItemSelectedListener listener)
{
this.listener = listener;
}
public Object invoke(Object proxy, Method method, Object[] args) throws Throwable
{
if (method.getName().equals("onItemSelected")) {
listener.onItemSelected(null, (View)args[1], (Integer)args[2], (Long)args[3]);
} else if (method.getName().equals("onNothingSelected")) {
listener.onNothingSelected(null);
}
return null;
}
}
public void setOnItemSelectedListener(OnItemSelectedListener listener)
{
if (spinnerICS != null) {
try {
Object obj = Proxy.newProxyInstance(OnItemSelectedListenerICS.getClassLoader(), new Class<?>[] { OnItemSelectedListenerICS } , new OnItemSelectedListenerProxyListener(listener));
setOnItemSelectedListenerICS.invoke(spinnerICS, obj);
} catch (Exception e) {
e.printStackTrace();
}
} else if (spinner != null) {
spinner.setOnItemSelectedListener(listener);
}
}
}
次に、このSpinnerICSを次のように使用します。
public boolean onCreateOptionsMenu(Menu menu) {
super.onCreateOptionsMenu(menu);
String[] items = new String[] { "one", "two", "three" };
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.support.v7.appcompat.R.layout.support_simple_spinner_dropdown_item, items);
adapter.setDropDownViewResource(android.support.v7.appcompat.R.layout.support_simple_spinner_dropdown_item);
SpinnerICS spinner = new SpinnerICS(this);
MenuItem item = menu.add("Sample:");
MenuItemCompat.setActionView(item, spinner.getView());
MenuItemCompat.setShowAsAction(item, MenuItemCompat.SHOW_AS_ACTION_ALWAYS);
spinner.setAdapter(adapter);
return true;
}
