java - android:layout_gravity ="end"在真实设备中编译时不工作

Question

我试图将气球消息对齐到屏幕的右侧/末端，尽管它显示在右侧，但在设备中看到时，它是在左侧。

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginEnd="@dimen/activity_horizontal_margin"
    android:layout_marginStart="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/chat_message_top_bottom_padding"
    android:paddingBottom="@dimen/chat_message_top_bottom_padding"
    android:paddingStart="@dimen/chat_message_right_left_padding"
    android:paddingEnd="@dimen/chat_message_right_left_padding"
    android:layout_gravity="end"
    android:background="@drawable/balloon_shape_sending"
    android:theme="@style/ChatMessagesMessageSending"
    android:orientation="vertical">

    <ImageView
        android:id="@+id/img_photo"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:adjustViewBounds="true" />

    <TextView
        android:id="@+id/tv_message"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceLarge"
        tools:text="Message" />

    <TextView
        android:id="@+id/tv_author"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceSmall"
        tools:text="Name" />
</LinearLayout>

在 Andriod Studio 中:

在我的设备中:

它用于在屏幕上显示消息的方式是使用 ListView:

<ListView
        android:id="@+id/list_message"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_above="@+id/layout_linear"
        android:stackFromBottom="true"
        android:divider="@android:color/transparent"
        android:transcriptMode="alwaysScroll"
        tools:listitem="@layout/item_message"/>

在负责填充列表的适配器下方:

public class MessageAdapter extends ArrayAdapter<ChatroomMessage> {
    MessageAdapter(@NonNull Context context, int resource, List<ChatroomMessage> objects) {
        super(context, resource, objects);
    }

    @NonNull
    @Override
    public View getView(int position, @Nullable View convertView, @NonNull ViewGroup parent) {
        if (convertView == null) {
            convertView = ((Activity) getContext()).getLayoutInflater().inflate(R.layout.item_message, parent, false);
        }

        ImageView imgPhoto = convertView.findViewById(R.id.img_photo);
        TextView tvAuthor = convertView.findViewById(R.id.tv_author);
        TextView tvMessage = convertView.findViewById(R.id.tv_message);

        ChatroomMessage message = getItem(position);

        if (message.getPhotoUrl() != null) {
            tvMessage.setVisibility(View.GONE);
            imgPhoto.setVisibility(View.VISIBLE);
            Glide.with(imgPhoto.getContext()).load(message.getPhotoUrl()).into(imgPhoto);
        } else {
            tvMessage.setVisibility(View.VISIBLE);
            imgPhoto.setVisibility(View.GONE);
            tvMessage.setText(message.getText());
        }

        tvAuthor.setText(message.getName());

        return convertView;
    }
}

Answer 1

我不知道为什么答案示例似乎有效，但这是我的解决方案:

<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_margin="@dimen/margin"
    android:orientation="vertical">

    <RelativeLayout
        android:layout_gravity="end"
        android:background="@drawable/balloon_shape_sending"
        android:theme="@style/ChatMessagesMessageSending"
        android:layout_width="wrap_content"
        android:padding="@dimen/padding"
        android:layout_height="wrap_content">
        ...
    </RelativeLayout>
</LinearLayout>