PopupMenu无法正常显示

Question

我正在制作一个Android应用程序，在某些活动中，当点击某些项目时，我正在使应用程序显示PopupMenu。

问题是PopupMenu不会立即显示所有选项，而是我必须向下滚动PopupMenu才能看到其余的菜单选项。

这个问题发生在两个活动中，但在第三个活动中，它显示为我想要的，虽然我使用相同的代码在所有这三个活动中创建PopupMenu！

这两张照片澄清了我遇到的问题：enter image description here enter image description here

这是活动的照片，显示了预期的菜单：enter image description here

这是出现问题的两个活动之一的代码：

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ListView;
import android.widget.PopupMenu;

import com.example.android.grad_qurantutor.data.DatabaseHelper;

import java.util.ArrayList;

public class FavoritesActivity extends AppCompatActivity {

    private DatabaseHelper dbHelper;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.general_list);

        dbHelper = new DatabaseHelper(this);

        final ArrayList<Ayah> arr = dbHelper.getFavorites();

        if(arr.size() > 0) {
            final AyahAdapter itemsAdapter = new AyahAdapter(this, arr);

            final ListView listView = (ListView) findViewById(R.id.list);

            listView.setAdapter(itemsAdapter);

            listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
                @Override
                public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
                    final Ayah a = arr.get(i);
                    PopupMenu popup = new PopupMenu(FavoritesActivity.this, listView);
                    popup.getMenuInflater().inflate(R.menu.menu_favorites_options, popup.getMenu());
                    popup.setOnMenuItemClickListener(new PopupMenu.OnMenuItemClickListener() {
                        @Override
                        public boolean onMenuItemClick(MenuItem item) {
                            switch (item.getItemId()) {
                                // Respond to a click on the "Add to Favorites" menu option
                                case R.id.unfavorite:
                                    dbHelper.unfavorite(a.getId());
                                    ArrayList<Ayah> arr = dbHelper.getFavorites();
                                    itemsAdapter.clear();
                                    itemsAdapter.addAll(arr);
                                    itemsAdapter.notifyDataSetChanged();
                                    return true;

                                case R.id.go_to_surah:
                                    Surah surah = dbHelper.getSurah(a.getSurahId());
                                    Intent myIntent = new Intent(FavoritesActivity.this, AyahsActivity.class);
                                    myIntent.putExtra("surahObj", surah);
                                    myIntent.putExtra("ayahNum", a.getNumber());
                                    startActivity(myIntent);
                                    return true;

                                case R.id.share_ayah:
                                    Intent shareIntent = new Intent(Intent.ACTION_SEND);
                                    shareIntent.setType("text/plain");

                                    String shareBody = a.getText();

                                    shareIntent.putExtra(Intent.EXTRA_TEXT , shareBody);

                                    startActivity(Intent.createChooser(shareIntent , "Share Using"));
                                    return true;
                            }
                            return true;
                        }
                    });
                    popup.show();
                }
            });
        }

    }
}

这是菜单xml：

<menu xmlns:android="http://schemas.android.com/apk/res/android">

    <item
        android:id="@+id/unfavorite"
        android:title="Unfavorite" />

    <item
        android:id="@+id/go_to_surah"
        android:title="Go to the Surah" />

    <item
        android:id="@+id/share_ayah"
        android:title="Share" />


</menu>

这是活动的xml布局：

<ListView xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/list"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#FFF8E1"
    android:drawSelectorOnTop="true"
    android:orientation="vertical" />

---

以下是按预期正确显示菜单的活动代码：

活动：

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.Gravity;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.PopupMenu;

import com.example.android.grad_qurantutor.data.DatabaseHelper;

import java.util.ArrayList;

public class SearchActivity extends AppCompatActivity {

    private DatabaseHelper dbHelper;
    class Listener implements AdapterView.OnItemClickListener{
        private ArrayList<Ayah> arr;
        private ListView listView;
        public Listener(ArrayList<Ayah> arr, ListView listView){
            this.arr = arr;
            this.listView = listView;
        }
        public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
            final Ayah a = arr.get(i);
            PopupMenu popup = new PopupMenu(SearchActivity.this, listView);
            popup.getMenuInflater().inflate(R.menu.menu_searched_ayahs_options, popup.getMenu());
            popup.setOnMenuItemClickListener(new PopupMenu.OnMenuItemClickListener() {
                @Override
                public boolean onMenuItemClick(MenuItem item) {
                    switch (item.getItemId()) {
                        // Respond to a click on the "Add to Favorites" menu option
                        case R.id.add_favorite2:
                            dbHelper.addFavoriteAyah(a.getId());
                            return true;

                        case R.id.go_to_surah2:
                            Surah surah = dbHelper.getSurah(a.getSurahId());
                            Intent myIntent = new Intent(SearchActivity.this, AyahsActivity.class);
                            myIntent.putExtra("surahObj", surah);
                            myIntent.putExtra("ayahNum", a.getNumber());
                            startActivity(myIntent);
                            return true;

                        case R.id.share_ayah:
                            Intent shareIntent = new Intent(Intent.ACTION_SEND);
                            shareIntent.setType("text/plain");

                            String shareBody = a.getText();

                            shareIntent.putExtra(Intent.EXTRA_TEXT , shareBody);

                            startActivity(Intent.createChooser(shareIntent , "Share Using"));
                            return true;
                    }
                    return true;
                }
            });
            popup.show();

        }
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_search);
    }

    public void search(View view){
        dbHelper = new DatabaseHelper(this);

        EditText editText = (EditText) findViewById(R.id.search_edit_text);

        ArrayList<Ayah> arr = dbHelper.search(editText.getText().toString().trim());

        if(arr.size() > 0) {
            AyahAdapter itemsAdapter = new AyahAdapter(this, arr);

            ListView listView = (ListView) findViewById(R.id.search_list);

            listView.setAdapter(itemsAdapter);

            listView.setOnItemClickListener(new Listener(arr, listView));
        }
    }
}

这是菜单xml：

<menu xmlns:android="http://schemas.android.com/apk/res/android">

    <item
        android:id="@+id/add_favorite2"
        android:title="Add to Favorites" />

    <item
        android:id="@+id/go_to_surah2"
        android:title="Go to the Surah" />

    <item
        android:id="@+id/share_ayah"
        android:title="Share" />


</menu>

这是活动的xml布局：

<LinearLayout 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"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#FFF8E1"
    android:orientation="vertical"
    tools:context=".SearchActivity">

    <EditText
        android:id="@+id/search_edit_text"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginLeft="24dp"
        android:layout_marginTop="24dp"
        android:layout_marginRight="24dp"
        android:layout_marginBottom="12dp"
        android:hint="search" />

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:layout_marginBottom="24dp"
        android:onClick="search"
        android:text="Search" />

    <ListView
        android:id="@+id/search_list"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"
        android:background="#FFF8E1"
        android:drawSelectorOnTop="true"
        android:orientation="vertical" />

</LinearLayout>

Answer 1

您将需要使用popup.setHeight()来设置所需的高度。

您可能还想使用popup.showAsDropdown()来更好地控制弹出窗口的显示位置。例如，我希望我出现在相对于enterPhoneNumberButton的某个位置：

int xOffset = popupWidthInDP > enterPhoneNumberButton.getWidth() ? 0 : enterPhoneNumberButton.getWidth() / 2 - dpToPx(popupWidthInDP / 2);
popup.showAsDropDown(enterPhoneNumberButton, xOffset, -enterPhoneNumberButton.getHeight() - dpToPx(popupHeightInDP));