我可以改变一个菜单项的背景颜色在安卓?
如果有人对此有任何解决方案，请让我知道。最后一个选项显然是自定义，但是否有任何方法可以在不自定义的情况下更改文本颜色。
当前回答
感谢您提供的代码示例。 我不得不修改它，让它与上下文菜单一起工作。 这就是我的解。
static final Class<?>[] constructorSignature = new Class[] {Context.class, AttributeSet.class};
class MenuColorFix implements LayoutInflater.Factory {
public View onCreateView(String name, Context context, AttributeSet attrs) {
if (name.equalsIgnoreCase("com.android.internal.view.menu.ListMenuItemView")) {
try {
Class<? extends ViewGroup> clazz = context.getClassLoader().loadClass(name).asSubclass(ViewGroup.class);
Constructor<? extends ViewGroup> constructor = clazz.getConstructor(constructorSignature);
final ViewGroup view = constructor.newInstance(new Object[]{context,attrs});
new Handler().post(new Runnable() {
public void run() {
try {
view.setBackgroundColor(Color.BLACK);
List<View> children = getAllChildren(view);
for(int i = 0; i< children.size(); i++) {
View child = children.get(i);
if ( child instanceof TextView ) {
((TextView)child).setTextColor(Color.WHITE);
}
}
}
catch (Exception e) {
Log.i(TAG, "Caught Exception!",e);
}
}
});
return view;
}
catch (Exception e) {
Log.i(TAG, "Caught Exception!",e);
}
}
return null;
}
}
public List<View> getAllChildren(ViewGroup vg) {
ArrayList<View> result = new ArrayList<View>();
for ( int i = 0; i < vg.getChildCount(); i++ ) {
View child = vg.getChildAt(i);
if ( child instanceof ViewGroup) {
result.addAll(getAllChildren((ViewGroup)child));
}
else {
result.add(child);
}
}
return result;
}
@Override
public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) {
LayoutInflater lInflater = getLayoutInflater();
if ( lInflater.getFactory() == null ) {
lInflater.setFactory(new MenuColorFix());
}
super.onCreateContextMenu(menu, v, menuInfo);
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.myMenu, menu);
}
对我来说，这适用于Android 1.6、2.03和4.03。
其他回答
感谢您提供的代码示例。 我不得不修改它，让它与上下文菜单一起工作。 这就是我的解。
static final Class<?>[] constructorSignature = new Class[] {Context.class, AttributeSet.class};
class MenuColorFix implements LayoutInflater.Factory {
public View onCreateView(String name, Context context, AttributeSet attrs) {
if (name.equalsIgnoreCase("com.android.internal.view.menu.ListMenuItemView")) {
try {
Class<? extends ViewGroup> clazz = context.getClassLoader().loadClass(name).asSubclass(ViewGroup.class);
Constructor<? extends ViewGroup> constructor = clazz.getConstructor(constructorSignature);
final ViewGroup view = constructor.newInstance(new Object[]{context,attrs});
new Handler().post(new Runnable() {
public void run() {
try {
view.setBackgroundColor(Color.BLACK);
List<View> children = getAllChildren(view);
for(int i = 0; i< children.size(); i++) {
View child = children.get(i);
if ( child instanceof TextView ) {
((TextView)child).setTextColor(Color.WHITE);
}
}
}
catch (Exception e) {
Log.i(TAG, "Caught Exception!",e);
}
}
});
return view;
}
catch (Exception e) {
Log.i(TAG, "Caught Exception!",e);
}
}
return null;
}
}
public List<View> getAllChildren(ViewGroup vg) {
ArrayList<View> result = new ArrayList<View>();
for ( int i = 0; i < vg.getChildCount(); i++ ) {
View child = vg.getChildAt(i);
if ( child instanceof ViewGroup) {
result.addAll(getAllChildren((ViewGroup)child));
}
else {
result.add(child);
}
}
return result;
}
@Override
public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) {
LayoutInflater lInflater = getLayoutInflater();
if ( lInflater.getFactory() == null ) {
lInflater.setFactory(new MenuColorFix());
}
super.onCreateContextMenu(menu, v, menuInfo);
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.myMenu, menu);
}
对我来说，这适用于Android 1.6、2.03和4.03。
Options menu in android can be customized to set the background or change the text appearance. The background and text color in the menu couldn’t be changed using themes and styles. The android source code (data\res\layout\icon_menu_item_layout.xml)uses a custom item of class “com.android.internal.view.menu.IconMenuItem”View for the menu layout. We can make changes in the above class to customize the menu. To achieve the same, use LayoutInflater factory class and set the background and text color for the view.
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.my_menu, menu);
getLayoutInflater().setFactory(new Factory() {
@Override
public View onCreateView(String name, Context context, AttributeSet attrs) {
if (name .equalsIgnoreCase(“com.android.internal.view.menu.IconMenuItemView”)) {
try{
LayoutInflater f = getLayoutInflater();
final View view = f.createView(name, null, attrs);
new Handler().post(new Runnable() {
public void run() {
// set the background drawable
view .setBackgroundResource(R.drawable.my_ac_menu_background);
// set the text color
((TextView) view).setTextColor(Color.WHITE);
}
});
return view;
} catch (InflateException e) {
} catch (ClassNotFoundException e) {}
}
return null;
}
});
return super.onCreateOptionsMenu(menu);
}
我使用的是材质设计，当工具栏在一个小屏幕上时，点击更多选项会显示一个空白的白色下拉框。为了解决这个问题，我想在主AppTheme中添加了这个:
<style name="AppTheme" parent="Theme.MaterialComponents.Light.NoActionBar">
<item name="android:itemTextAppearance">@style/menuItem</item>
</style>
然后创建了一个样式，你可以将菜单项的textColor设置为你想要的颜色。
<style name="menuItem" parent="Widget.AppCompat.TextView.SpinnerItem">
<item name="android:textColor">@color/black</item>
</style>
父名称widget。appcompat . textview . spinneritem我不认为这太重要，它应该仍然工作。
我找到了，尤利卡!!
在你的应用主题中:
<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
<item name="android:actionBarStyle">@style/ActionBarTheme</item>
<!-- backward compatibility -->
<item name="actionBarStyle">@style/ActionBarTheme</item>
</style>
这是你的动作栏主题:
<style name="ActionBarTheme" parent="@style/Widget.AppCompat.Light.ActionBar.Solid.Inverse">
<item name="android:background">@color/actionbar_bg_color</item>
<item name="popupTheme">@style/ActionBarPopupTheme</item
<!-- backward compatibility -->
<item name="background">@color/actionbar_bg_color</item>
</style>
这是你弹出的主题:
<style name="ActionBarPopupTheme">
<item name="android:textColor">@color/menu_text_color</item>
<item name="android:background">@color/menu_bg_color</item>
</style>
干杯,)
试试这段代码....
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.my_menu, menu);
getLayoutInflater().setFactory(new Factory() {
@Override
public View onCreateView(String name, Context context,
AttributeSet attrs) {
if (name.equalsIgnoreCase("com.android.internal.view.menu.IconMenuItemView")) {
try {
LayoutInflater f = getLayoutInflater();
final View view = f.createView(name, null, attrs);
new Handler().post(new Runnable() {
public void run() {
// set the background drawable
view.setBackgroundResource(R.drawable.my_ac_menu_background);
// set the text color
((TextView) view).setTextColor(Color.WHITE);
}
});
return view;
} catch (InflateException e) {
} catch (ClassNotFoundException e) {
}
}
return null;
}
});
return super.onCreateOptionsMenu(menu);
}
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