Android的看到图像/当没看见方向改变 [英] Android Image is seen/not seen when orientation is changed

问题描述

我有一些问题，滚动型和的ImageView 。

我要的是：

我有一个的ImageView 在屏幕顶部总是设置。然后，我有一个滚动型去哪里了查看中的所有元素，而且里面我有另一个 ImageView的它被设定在当previous元件不填屏幕（通常大屏幕）的屏幕的底部，并且它被设置在<$ C $的底部C>滚动型时存在滚动。

I have an ImageView set always at the top of the screen. Then, I have an ScrollView where go all elements of the View, and inside it I have another ImageView which it is set at the bottom of the screen when previous elements don't fill screen (usually Big Screens), and it is set at the bottom of the ScrollView when exists Scroll.

这是确定一些其他活动我有，但我有一个活动的一些问题具有的FrameLayout 。

It is ok for some other Activities I have, but I have some problems in one Activity that has a FrameLayout.

我得到的是：

（见$ C $以下三）当我在 RelativeLayout的的的ImageView （一到集留在底部） HEIGHT =WRAP_CONTENT：

(See code below) When I set in the RelativeLayout of the ImageView (the one to stay at the bottom) height = "wrap_content":

• 在纵向方向：将图片不用其真正的大小，因为它不适合在屏幕上。要适应它，滚动应该会出现。 - >我不知道为什么它不会出现像在其他活动
。

• 在横向：的ImageView 出现在屏幕的底部。至于其他元素不适合在屏幕上，滚动出现在的FrameLayout 。

• In portrait orientation: The Image don't have its real size because it doesn't fit on the screen. To fit in it, Scroll should appear. -> I don't know why it doesn't appear like in other Activities.
• In landscape orientation: ImageView appears at the bottom of the screen. As other elements don't fit on the screen, Scroll appears inside FrameLayout.

当我在 RelativeLayout的的的ImageView （一个留在底部）<$ C的设置$ C> HEIGHT =200dp（图像的实际高度是小）：

When I set in the RelativeLayout of the ImageView (the one to stay at the bottom) height = "200dp" (real height of image is smaller):

• 在纵向方向：将图片不会出现。没有任何滚动（因为其他因素被认为是没有必要的）。


• 在横向：出现两个滚动。一个在的FrameLayout 为元素，另一个用于看到的ImageView 。

• In portrait orientation: The Image doesn't appear. There isn't any Scroll (it is not necessary because other elements are seen).
• In landscape orientation: Appear two Scrolls. One inside FrameLayout for elements, and another for seeing the ImageView.

这是我的code最新的：

<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="fill_parent"
    tools:context=".FacturasActivity"
    android:orientation="vertical" >

    <LinearLayout 
        android:id="@+id/linearLayoutLogoFactor_factura"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:gravity="center_horizontal" >

        <ImageView 
            android:id="@+id/imageViewLogoFactor_factura"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:src="@drawable/logo_factorenergia"/>

    </LinearLayout>

    <ScrollView
        android:id="@+id/scrollViewMain"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:fillViewport="true" >

        <LinearLayout
            android:id="@+id/linearLayoutMain2"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:layout_marginLeft="20dp"
            android:layout_marginRight="20dp"
            android:layout_gravity="center_horizontal"
            android:focusable="true"
            android:focusableInTouchMode="true"
            android:orientation="vertical" >

            <LinearLayout 
                android:id="@+id/linearLayoutDireccionFactura"
                android:layout_width="fill_parent"
                android:layout_height="wrap_content"
                android:layout_marginLeft="25dp"
                android:layout_marginRight="25dp"
                android:layout_marginTop="10dp"
                android:weightSum="1.0">

                <TextView
                    android:id="@+id/textViewlabelDireccionFactura"
                    android:layout_width="0dp"
                    android:layout_height="wrap_content"
                    android:layout_weight="0.3"
                    android:text="@string/etiqueta_direccion"
                    android:textSize="@dimen/textSize"
                    android:textStyle="bold" />

                <TextView
                    android:id="@+id/textViewDireccion"
                    android:layout_width="0dp"
                    android:layout_height="wrap_content"
                    android:layout_weight="0.7"
                    android:textSize="@dimen/textSize" />

            </LinearLayout>

            <FrameLayout
                android:id="@+id/frameLayoutFacturas"
                android:layout_width="fill_parent"
                android:layout_height="wrap_content"
                android:layout_marginLeft="25dp"
                android:layout_marginRight="25dp"
                android:layout_marginTop="10dp" >

                <ListView
                    android:id="@android:id/list"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content" />

                <TextView
                    android:id="@android:id/empty"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="@string/facturas_vacia"
                    android:textSize="@dimen/textSize" />

            </FrameLayout>

            <RelativeLayout
                android:id="@+id/linearLayoutImagenInferior_main"
                android:layout_width="fill_parent"
                android:layout_height="wrap_content"
                android:layout_marginTop="20dp" >

                <ImageView
                    android:id="@+id/imageViewImagenInferior_main"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_alignParentBottom="true"
                    android:layout_centerHorizontal="true"
                    android:adjustViewBounds="true"
                    android:src="@drawable/la_electrica_de_las_empresas" />
            </RelativeLayout>

        </LinearLayout>

    </ScrollView>

</LinearLayout>

你能帮助我吗？先谢谢了。

Can you help me? Thanks in advance.

推荐答案

该解决方案，我发现，在看<一个href=\"http://stackoverflow.com/questions/3495890/how-can-i-put-a-listview-into-a-scrollview-without-it-collapsing\">that问题是：

The solution I've found, looking at that question, is:

创建功能：

public static void setListViewHeightBasedOnChildren(ListView listView) {
        ListAdapter listAdapter = listView.getAdapter(); 
        if (listAdapter == null) {
            // pre-condition
            return;
        }

        int totalHeight = 0;
        for (int i = 0; i < listAdapter.getCount(); i++) {
            View listItem = listAdapter.getView(i, null, listView);
            listItem.measure(0, 0);
            totalHeight += listItem.getMeasuredHeight();
        }

        ViewGroup.LayoutParams params = listView.getLayoutParams();
        params.height = totalHeight + (listView.getDividerHeight() * (listAdapter.getCount() - 1));
        listView.setLayoutParams(params);
    }

和我的ListView控件调用它。只有一个滚动（一的滚动型）被看到和使用。

and call it with my ListView. Only one Scroll (the one of ScrollView) is seen and used.

这篇关于Android的看到图像/当没看见方向改变的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！