java - 自定义 TextView 不显示文本但仅显示背景

Question

我有一个 TextView 的奇怪行为它打败了我我怎样才能找到解决这个问题的方法。我有一个布局

<?xml version='1.0' encoding='utf-8' ?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:gravity="start"
    android:orientation="horizontal"
    android:visibility="visible">

    <View
        android:id="@+id/them_avatar_spacer"
        android:layout_width="@dimen/avatar_size"
        android:layout_height="0.0dip"
        android:visibility="gone"/>

    <org.slabs.fc.chatstarter.ui.CircularImageView
        android:id="@+id/them_avatar"
        android:layout_width="@dimen/avatar_size"
        android:layout_height="@dimen/avatar_size"
        android:layout_marginLeft="5dp"
        android:layout_marginTop="10dp"
        android:src="@drawable/default_avatar"
        android:visibility="gone"/>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginLeft="4.0dip"
        android:gravity="start"
        android:orientation="vertical">

        <TextView
            android:id="@+id/chat_title"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginBottom="2.0dip"
            android:layout_marginLeft="6.0dip"
            android:layout_marginTop="6dp"
            android:includeFontPadding="false"
            android:text="Title"
            android:textColor="@color/black_light"
            android:textSize="@dimen/chat_name_fontsize"/>

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:gravity="start"
            android:orientation="horizontal">

            <TextView
                android:id="@+id/chat_text"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginRight="63.0dip"
                android:autoLink="all"
                android:background="@drawable/selectable_balloon_left"
                android:clickable="true"
                android:lineSpacingExtra="@dimen/text_body_line_spacing"
                android:linksClickable="true"
                android:text="Every message text comes here"
                android:textColor="@color/black_heavy"
                android:textIsSelectable="false"
                android:textSize="@dimen/chat_text_msg_fontsize"
                android:visibility="visible"/>

            <TextView
                android:id="@+id/chat_time"
                android:layout_width="60.0dip"
                android:layout_height="wrap_content"
                android:layout_gravity="start|center"
                android:layout_marginLeft="-60.0dip"
                android:text="12:15"
                android:textColor="@color/black_lightest"
                android:textSize="@dimen/chat_timestamp_fontsize"/>
        </LinearLayout>
    </LinearLayout>
</LinearLayout>

它在 XML 编辑器的设计选项中为我提供了所需的布局，如图所示

但是当我运行应用程序时，id 为 chat_text 的 TextView 没有显示，我得到如下结果，

然后我尝试创建一个自定义 TextView 我只是创建了一个

public class ChatThemTextView extends TextView {

    public ChatThemTextView(Context context) {
        super(context);
    }

    public ChatThemTextView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public ChatThemTextView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
        super(context, attrs, defStyleAttr, defStyleRes);
    }

    @Override
    protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
        super.onLayout(changed, left, top, right, bottom);
        ViewGroup.MarginLayoutParams margins = ViewGroup.MarginLayoutParams.class.cast(getLayoutParams());
        int margin = 5;
        margins.topMargin = margin;
        margins.bottomMargin = margin;
        margins.leftMargin = margin;
        margins.rightMargin = margin;
        setLayoutParams(margins);
    }
}

此时出现了另一个问题，即当我添加第一条消息时我没有得到任何东西，但是当我添加第二条消息时我得到了背景，但 TextView 仍然没有显示，如下所示

你们都看到了预期的输出结果，感谢任何帮助......

更新

ViewHolder 很简单

public class ViewHolder extends RecyclerView.ViewHolder {
    public ViewHolder(View itemView) {
        super(itemView);
    }
}

适配器类在这里

public class ChatMessageAdapter extends RecyclerView.Adapter<ViewHolder> {

    private List<ChatMessage> mMessageList;
    private Context mContext;
    private boolean isMe = false;
    public ChatMessageAdapter(Context mContext, List<ChatMessage> mMessageList){
        this.mContext = mContext;
        this.mMessageList = mMessageList;
    }

    @Override
    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View rootView = View.inflate(mContext, R.layout.chat_them_container, null);
        return new ThemMessageHolder(rootView);
    }

    @Override
    public void onBindViewHolder(ViewHolder holder, int position) {
        ThemMessageHolder messageHolder = (ThemMessageHolder) holder;
        messageHolder.mMessageTextView.setText(mMessageList.get(position).getMessage());
        messageHolder.mSentAtTextView.setText(mMessageList.get(position).getSentAt());
        Log.e("MSG_TEXT", mMessageList.get(position).getMessage());
    }

    @Override
    public int getItemCount() {
        return mMessageList.size();
    }

    public void clearData() {
        mMessageList.clear(); //clear list
        this.notifyDataSetChanged();
    }
}

重要

我在

得到 Sting 值

Log.e("MSG_TEXT", mMessageList.get(position).getMessage());

但是 TextView 没有显示那个字符串...

.gitignore 是

*.iml
.gradle
/local.properties
/.idea/workspace.xml
/.idea/libraries
.DS_Store
/build
/captures

settings.gradle 只是

include ':app'

Answer 1

您可以更改:

View rootView = View.inflate(mContext, R.layout.chat_them_container, null);

收件人:

View rootView = LayoutInflater.from(mContext).inflate(R.layout.chat_them_container, parent, false);

它将尊重其父级的 LayoutParams，从而解决您的问题。