Question

我想在Android中实现自定义弹出式菜单，例如Twitter，例如项目和图片，但我不知道用于此的组件是什么。

在Material Design网站上，google present this solution。所以我认为，有一个本机解决方案来实现这一目标。

enter image description here

我尝试使用Popup menu，但我无法找到如何自定义此视图的布局。

Answer 1

您可以使用ListPopupWindow，提交自定义适配器，通过该适配器可以控制ListPopupWindow的每一行的布局。至于普通PopupWindow，你必须提供一个锚点视图，另外你必须在setContentWidth的实例上调用ListPopupWindow，它将弹出窗口的宽度设置为其大小内容。这是一个你必须付出的小代价，但对于一个小数据集来说并不是什么大问题。我有这个实用工具方法来检索行的最大宽度：

public int measureContentWidth(ListAdapter adapter) {
    int maxWidth = 0;
    int count = adapter.getCount();
    final int widthMeasureSpec = MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED);
    final int heightMeasureSpec = MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED);
    View itemView = null;
    for (int i = 0; i < count; i++) {
        itemView = adapter.getView(i, itemView, this);
        itemView.measure(widthMeasureSpec, heightMeasureSpec);
        maxWidth = Math.max(maxWidth, itemView.getMeasuredWidth());
    }
    return maxWidth;
}

Answer 2

有一个名为PopupMenu的小部件，它基本上是一个锚定到特定视图的菜单。一个缺点是它默认不显示图标。

但是，您可以使用反射并调用setForceShowIcon来显示它们。您需要的代码是：

由于PopupMenu已锚定到特定视图，因此您的ActionBar项目具有actionLayout属性。该布局（action_item.xml）可以简单如下：

<Button
    xmlns:android="http://schemas.android.com/apk/res/android"
    style="?attr/actionButtonStyle"
    android:layout_gravity="center"
    android:text="Show popup"
    android:textStyle="bold"
    android:textSize="12sp"
    android:layout_width="wrap_content"
    android:layout_height="match_parent"/>

ActionBar菜单样式，其中包含具有上述布局的项目

<menu
    xmlns:android="http://schemas.android.com/apk/res/android">
    <item
        android:id="@+id/popup_item"
        android:title="Show popup"
        android:showAsAction="always"
        android:actionLayout="@layout/action_item"/>
</menu>

您的popup_menu.xml，您为PopupMenu

宣传的布局

<menu
    xmlns:android="http://schemas.android.com/apk/res/android">
    <item
        android:id="@+id/item1"
        android:title="Item1"
        android:icon="@mipmap/ic_launcher"/>
</menu>

最后在单击ActionBar项目时执行通货膨胀的代码

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    switch (item.getItemId()) {
        case R.id.action_add_item:
            PopupMenu popup = new PopupMenu(this, item.getActionView());
            MenuInflater inflater = popup.getMenuInflater();
            inflater.inflate(R.menu.popup_menu, popup.getMenu());

            // Use reflection to invoke setForceShowIcon
            try {
                Field[] fields = popup.getClass().getDeclaredFields();
                for (Field field : fields) {
                    if ("mPopup".equals(field.getName())) {
                        field.setAccessible(true);
                        Object menuPopupHelper = field.get(popup);
                        Class<?> classPopupHelper = Class
                                .forName(menuPopupHelper.getClass().getName());
                        Method setForceIcons = classPopupHelper
                                .getMethod("setForceShowIcon", boolean.class);
                        setForceIcons.invoke(menuPopupHelper, true);
                        break;
                    }
                }
            } catch (Exception e) {
                e.printStackTrace();
            }

            popup.show();
            return true;
    }

    return super.onOptionsItemSelected(item);
}

请注意，要在菜单中获取多行文字，您还需要为弹出菜单项使用actionLayout。

Answer 3

使用Pop-Up list fragment。片段的好处在于你可以轻松地animate them （如果您不理解片段，我建议您先阅读Fragment Introduction）

如果您想完全控制弹出式内容，请参阅Dialog Fragment

Answer 4

我有同样的问题。但最后我在自己的解决方案中发现我正在分享我的代码。希望能帮到你。

popupWindowDogs = popupWindowDogs();
    button.setOnClickListener(new OnClickListener() {
        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            // popupWindowDogs.showAsDropDown(v, -5, 0);
            popupWindowDogs().showAtLocation(v, Gravity.CENTER, 0, 0);
        }
    });
    // Detect touched area
    detector = new SimpleGestureFilter(this, this);

}

public PopupWindow popupWindowDogs()
{

    // initialize a pop up window type
    PopupWindow popupWindow = new PopupWindow(this);

    // the drop down list is a list view
    final ListView listView = new ListView(this);
    // set our adapter and pass our pop up window contents
    listView.setAdapter(dogsAdapter(popUpContents));
    // listView.setBackgroundColor(Color.DKGRAY);
    listView.setBackgroundResource(R.drawable.ss4);
    listView.setPadding(0, 0, 0, 10);
    listView.setDivider(null);
    try {

        listView.setOnScrollListener(new OnScrollListener() {

            @Override
            public void onScrollStateChanged(AbsListView view, int scrollState) {
                View c = listView.getChildAt(0);
                String cc = listView.getChildAt(0).toString();
                int scrolly = -c.getTop() + listView.getFirstVisiblePosition() * c.getHeight();
                /*
                 * Toast.makeText(getApplicationContext(), scrolly + "", Toast.LENGTH_SHORT)
                 * .show();
                 */}

            @Override
            public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount,
                    int totalItemCount) {

            }
        });
    } catch (Exception e) {
        Toast.makeText(getApplicationContext(), e.toString() + "", Toast.LENGTH_SHORT)
                .show();
    }
    listView.setOnItemClickListener(new OnItemClickListener() {

        @Override
        public void onItemClick(AdapterView<?> arg0, View v, int arg2,
                long arg3) {
            try {

                // TODO Auto-generated method stub
                Context mContext = v.getContext();
                Swipetouch mainActivity = ((Swipetouch) mContext);
                // add some animation when a list item was clicked
                Animation fadeInAnimation = AnimationUtils.loadAnimation(v.getContext(),
                        android.R.anim.fade_in);
                fadeInAnimation.setDuration(10);
                v.startAnimation(fadeInAnimation);
                // dismiss the pop up
                mainActivity.popupWindowDogs.dismiss();
                // get the text and set it as the button text
                String val = (String) arg0.getItemAtPosition(arg2);
                // Toast.makeText(mContext, val, Toast.LENGTH_SHORT).show();
                if (val.equals("Signup Now")) {
                    Intent ii = new Intent(getApplicationContext(), Registration.class);
                    startActivity(ii);
                    stopService(new Intent(Swipetouch.this, MyService.class));
                    stopService(new Intent(Swipetouch.this, MyService.class));
                } else if (val.equals("Login")) {
                    Intent ii = new Intent(getApplicationContext(), MyLoginActivity.class);
                    startActivity(ii);
                    stopService(new Intent(Swipetouch.this, MyService.class));

                } else if (val.equals("Exit")) {
                    finish();
                    stopService(new Intent(Swipetouch.this, MyService.class));
                } else if (val.equals("Friends")) {
                    Intent ii = new Intent(getApplicationContext(), MyLoginActivity.class);
                    startActivity(ii);
                } else if (val.equals("Exit")) {
                    stopService(new Intent(Swipetouch.this, MyService.class));
                    finish();
                }

            } catch (Exception e) {
                Toast.makeText(Swipetouch.this, e.toString(), Toast.LENGTH_SHORT).show();
            }
        }

    });
    // some other visual settings
    popupWindow.setFocusable(true);
    popupWindow.setWidth(250);
    // popupWindow.setHeight(300);
    popupWindow.setHeight(WindowManager.LayoutParams.WRAP_CONTENT);

    // set the list view as pop up window content
    // SET WALLPAPER IMAGE
    /*
     * popupWindow.setBackgroundDrawable(getWallpaper()); popupWindow.setHeight(300);
     */
    // layout.setBackgroundResource(R.drawable.sshadow);
    // layout.setBackgroundColor(Color.TRANSPARENT);
    // popupWindow.setContentView(layout);

    popupWindow.setBackgroundDrawable(new ColorDrawable(
            android.graphics.Color.TRANSPARENT));
    popupWindow.setContentView(listView);

    return popupWindow;
}

Answer 5

此代码可在我的应用中使用。

试试这个： -

<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=".LocationDetailsActivity">


<item xmlns:tools="http://schemas.android.com/tools"
    android:icon="@android:drawable/ic_menu_mapmode"
    app:showAsAction="ifRoom"
    android:title="@string/title_of_menu"
    tools:context=".LocationDetailsActivity">
    //the menu list with icon
    <menu>
        <item
            android:id="@+id/action_map_type_normal"
            android:orderInCategory="100"
            android:icon="some_icon" //place your icon here
            android:title="Vacation spots" />
        <item
            android:id="@+id/action_map_type_satellite"
            android:orderInCategory="100"
            android:icon="some_icon" //place your icon here
            android:title="Friends and family" />
        <item
            android:id="@+id/action_map_type_hybrid"
            android:orderInCategory="100"
            android:icon="some_icon" //place your icon here
            android:title="Restaurants" />
    </menu>
</item>

您可以浏览这些不同提供商的教程

http://developer.android.com/guide/topics/ui/actionbar.html

http://www.vogella.com/tutorials/AndroidActionBar/article.html

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

所有这些都有很好的示例和源代码可以帮助您

希望这可以帮助你：）

Answer 6

  try {
                    java.lang.reflect.Field[] fields = popup.getClass().getDeclaredFields();
                    for (java.lang.reflect.Field field : fields) {
                        if ("mPopup".equals(field.getName())) {
                            field.setAccessible(true);
                            Object menuPopupHelper = field.get(popup);
                            Class<?> classPopupHelper = Class
                                    .forName(menuPopupHelper.getClass().getName());
                            Method setForceIcons = classPopupHelper
                                    .getMethod("setForceShowIcon", boolean.class);
                            setForceIcons.invoke(menuPopupHelper, true);
                            break;
                        }
                    }
                } catch (Exception e) {
                    e.printStackTrace();
                }

Answer 7

更轻松的解决方案。在你的.show（）方法之前添加它。

try {
  Field mFieldPopup=popupMenu.getClass().getDeclaredField("mPopup");
  mFieldPopup.setAccessible(true);
  MenuPopupHelper mPopup = (MenuPopupHelper) mFieldPopup.get(popupMenu);
  mPopup.setForceShowIcon(true);
} catch (Exception e) {}

如何使用Material Design Android实现此自定义弹出菜单？

7 个答案: