创建视图＆＃34;膨胀＆＃34;扩展RelativeLayout，但在使用时是空白的

Question

我通过夸大布局来调暗视图，代码如下：

public class MenuItemView extends RelativeLayout {

private Context context;

TextView tv_title;
String title = "";

TextView tv_content;
String content = "";

TextView tv_guid;
String guid = "";

ImageView iv_divider;
ImageView iv_arrow;
RelativeLayout rl_main;

public MenuItemView(Context context) {
    super(context);
    initView(context, null);
}

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

public MenuItemView(Context context, AttributeSet attrs, int defStyleAttr) {
    super(context, attrs, defStyleAttr);
    initView(context, attrs);
}

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

@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
    for (int i = 0; i < getChildCount(); i++) {
        getChildAt(i).layout(l, t, r, b);
    }
}

private void initView(Context context, AttributeSet attrs) {
    this.context = context;
    inflate(context, R.layout.menu_item_view_layout, this);
    tv_title = (TextView) findViewById(R.id.tv_title);
    tv_content = (TextView) findViewById(R.id.tv_content);
    tv_guid = (TextView) findViewById(R.id.tv_guid);
    iv_arrow = (ImageView) findViewById(R.id.iv_arrow);
    iv_divider = (ImageView) findViewById(R.id.iv_divider);
    rl_main = (RelativeLayout) findViewById(R.id.rl_main);

    //Default
    if (attrs != null) {
        TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.MenuItemView);
        title = a.getString(R.styleable.MenuItemView_menu_title);
        content = a.getString(R.styleable.MenuItemView_menu_content);
        guid = a.getString(R.styleable.MenuItemView_menu_guid);
        a.recycle();
    }
    //
    tv_title.setText(title);
    tv_content.setText(content);
    tv_guid.setText(guid);
}

@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
    super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}

private int getpx(int dp) {
    return (int) (context.getResources().getDisplayMetrics().density * dp + 0.5f);
}
}

当我在layout.like这个

中使用它时

虽然执行得很好，但是当我有时使用它时，就像这样：

<?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="match_parent"
    android:orientation="vertical">

    <setmenu.smzdm.com.menuitemview.MenuItemView xmlns:app="http://schemas.android.com/apk/res-auto"
        android:id="@+id/menu_item"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:menu_content="Content"
        app:menu_guid="Guid"
        app:menu_title="Title" />

    <setmenu.smzdm.com.menuitemview.MenuItemView xmlns:app="http://schemas.android.com/apk/res-auto"
        android:id="@+id/menu_item2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:menu_content="Content"
        app:menu_guid="Guid"
        app:menu_title="Title" />

    <setmenu.smzdm.com.menuitemview.MenuItemView xmlns:app="http://schemas.android.com/apk/res-auto"
        android:id="@+id/menu_item3"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:menu_content="Content"
        app:menu_guid="Guid"
        app:menu_title="Title" />
    </LinearLayout>

它只能显示一个视图，例如：

当它在移动设备上运行时，它也可以在布局中显示一个视图。

Answer 1

您的扩充视图未添加到您的客户视图中。你应该修理：

View view = inflate(context, R.layout.menu_item_view_layout, this);
tv_title = (TextView) view.findViewById(R.id.tv_title);
tv_content = (TextView) view.findViewById(R.id.tv_content);
tv_guid = (TextView) view.findViewById(R.id.tv_guid);
iv_arrow = (ImageView) view.findViewById(R.id.iv_arrow);
iv_divider = (ImageView) view.findViewById(R.id.iv_divider);
rl_main = (RelativeLayout) view.findViewById(R.id.rl_main);
// your code
// and last, you have to add view to customeView
addView(view);