在android中添加上下文菜单图标

Question

我有一个带有 ContextMenu 的 Listview，但是当我为 ContextMenu setIcon 时，它看起来不起作用

public void onCreateContextMenu(ContextMenu menu , View v, 
        ContextMenuInfo menuInfo){

    super.onCreateContextMenu(menu, v, menuInfo);
    menu.add(0, DELETE_ID, 0, R.string.context_menu_favorite)
        .setIcon(android.R.drawable.btn_star);      
}

Answer 1

这可能是您所缺少的：

popup.setForceShowIcon(true)

Answer 2

虽然 API 不支持上下文菜单中的图标，但我们总是可以通过使用看起来像上下文菜单的我们自己的视图来膨胀对话框来伪造它。

复制粘贴以下文件即可完成这项工作：

MainActivity.java

public class MainActivity extends Activity {

List<ContextMenuItem> contextMenuItems;
Dialog customDialog;

LayoutInflater inflater;
View child;
ListView listView;
ContextMenuAdapter adapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    inflater = (LayoutInflater) this
            .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    child = inflater.inflate(R.layout.listview_context_menu, null);
    listView = (ListView) child.findViewById(R.id.listView_context_menu);

    contextMenuItems = new ArrayList<ContextMenuItem>();
    contextMenuItems.add(new ContextMenuItem(getResources().getDrawable(
            R.drawable.ic_launcher), "Facebook"));
    contextMenuItems.add(new ContextMenuItem(getResources().getDrawable(
            R.drawable.ic_launcher), "Scanner"));

    adapter = new ContextMenuAdapter(this,
            contextMenuItems);
    listView.setAdapter(adapter);

            listView.setOnItemClickListener(new OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> parent, View v,
                int position, long id) {
            customDialog.dismiss();
            if (position == 0)
                Toast.makeText(MainActivity.this, "00", Toast.LENGTH_SHORT)
                        .show();

            if (position == 1)
                Toast.makeText(MainActivity.this, "11", Toast.LENGTH_SHORT)
                        .show();

        }
    });

    customDialog = new Dialog(this);
    customDialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
    customDialog.setContentView(child);
    customDialog.show();
    }

}

ContextMenuItem.java

public class ContextMenuItem {

Drawable drawable;
String text;

public ContextMenuItem(Drawable drawable, String text) {
    super();
    this.drawable = drawable;
    this.text = text;
}

public Drawable getDrawable() {
    return drawable;
}

public void setDrawable(Drawable drawable) {
    this.drawable = drawable;
}

public String getText() {
    return text;
}

public void setText(String text) {
    this.text = text;
}

}

ContextMenuAdapter.java

public class ContextMenuAdapter extends BaseAdapter {
Context context;
List<ContextMenuItem> listContextMenuItems;
LayoutInflater inflater;

public ContextMenuAdapter(Context context,
        List<ContextMenuItem> listContextMenuItems) {
    super();
    this.context = context;
    this.listContextMenuItems = listContextMenuItems;
}

static class ViewHolder {
    protected ImageView imageView;
    protected TextView textView;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    ViewHolder viewHolder;
    if (convertView == null) {
        inflater = (LayoutInflater) context
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        viewHolder = new ViewHolder();
        convertView = inflater.inflate(R.layout.context_menu_item, parent,
                false);
        viewHolder.imageView = (ImageView) convertView
                .findViewById(R.id.imageView_menu);
        viewHolder.textView = (TextView) convertView
                .findViewById(R.id.textView_menu);
        convertView.setTag(viewHolder);
    } else {
        viewHolder = (ViewHolder) convertView.getTag();
    }

    viewHolder.imageView.setImageDrawable(listContextMenuItems
            .get(position).getDrawable());
    viewHolder.textView.setText(listContextMenuItems.get(position)
            .getText());
    return convertView;

}

@Override
public int getCount() {
    return listContextMenuItems.size();
}

@Override
public Object getItem(int position) {
    return null;
}

@Override
public long getItemId(int position) {
    return 0;
}

}

context_menu_item.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="wrap_content"
android:paddingBottom="10dp"
android:paddingLeft="10dp"
android:paddingTop="10dp" >

<ImageView
    android:id="@+id/imageView_menu"
    android:layout_width="70dp"
    android:layout_height="70dp"
    android:scaleType="fitXY" />

<TextView
    android:id="@+id/textView_menu"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_centerVertical="true"
    android:layout_marginLeft="10dp"
    android:layout_toRightOf="@+id/imageView_menu" />

</RelativeLayout>

listview_context_menu.xml

<?xml version="1.0" encoding="utf-8"?>
<ListView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/listView_context_menu"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@+id/view" />

Answer 3

虽然 Android API 不允许在上下文菜单中使用图标，但您可以看到 Android 在很多地方都在使用它们。 长按主屏幕就是一个很好的例子。

我花时间深入研究 Launcher 和 AnyCut 源代码，发现 Google 正在使用他们自己的自定义类，该类扩展了 BaseAdapter 以及他们自己的自定义布局。

我能够几乎完全复制他们的类和布局，并在我自己的应用程序中使用它来完成。 如果您要搜索该类，则该类名为 AddAdapter.java。

享受！

Answer 4

我是通过这种方式做到的：

参考截图：

菜单：

menu_病人_语言.xml

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    tools:context=".activities.PatientSelectionActivity">

    <item
        android:id="@+id/menuEnglish"
        android:icon="@drawable/language_english"
        android:title="@string/english" />

    <item
        android:id="@+id/menuFrench"
        android:icon="@drawable/language_french"
        android:title="@string/french" />

</menu>

样式：

style.xml：

  <!-- Base application theme. -->
    <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
        <!-- Customize your theme here. -->

        <item name="android:popupMenuStyle">@style/popupMenuStyle</item>

    </style>

  <!--- Language selection popup -->

    <style name="popupMenuStyle" parent="Theme.AppCompat.Light.DarkActionBar">
        <item name="android:textColor">@color/colorPrimary</item>
        <item name="android:itemBackground">@android:color/white</item>
    </style>

Java代码：

 private void showPopup(View v) {

        Context wrapper = new ContextThemeWrapper(this, R.style.popupMenuStyle);
        PopupMenu mypopupmenu = new PopupMenu(wrapper, v);

        setForceShowIcon(mypopupmenu);
        MenuInflater inflater = mypopupmenu.getMenuInflater();
        inflater.inflate(R.menu.menu_patient_language, mypopupmenu.getMenu());
        mypopupmenu.show();
//        mypopupmenu.getMenu().getItem(0).setIcon(getResources().getDrawable(R.mipmap.ic_launcher));
        mypopupmenu.setOnMenuItemClickListener(new PopupMenu.OnMenuItemClickListener() {
            @Override
            public boolean onMenuItemClick(MenuItem item) {
                txtPreferredLanguage.setText(item.getTitle().toString());
                switch (item.getItemId()) {
                    case R.id.menuEnglish:
                        // Your code goes here
                        break;

                    case R.id.menuFrench:
                        // Your code goes here
                        break;
                }
                return false;
            }
        });
    }

    private void setForceShowIcon(PopupMenu popupMenu) {
        try {
            Field[] mFields = popupMenu.getClass().getDeclaredFields();
            for (Field field : mFields) {
                if ("mPopup".equals(field.getName())) {
                    field.setAccessible(true);
                    Object menuPopupHelper = field.get(popupMenu);
                    Class<?> popupHelper = Class.forName(menuPopupHelper.getClass().getName());
                    Method mMethods = popupHelper.getMethod("setForceShowIcon", boolean.class);
                    mMethods.invoke(menuPopupHelper, true);
                    break;
                }
            }
        } catch (Throwable e) {
            e.printStackTrace();
        }
    }

希望这对您有所帮助。

完成

Answer 5

该库允许您使用标准 XML 菜单创建带有图标的上下文菜单（实现为 AlertDialog）。

https://code.google.com/p/android-icon-context-菜单/

Answer 6

上下文菜单不支持图标。

注意：上下文菜单项不
支持图标或快捷键。