ScrollView使用fillViewport设置高度为MatchParent

转载请注明出处：http://blog.csdn.net/u012975705/article/details/49275001

之前遇到一问题，就是当使用ScrollView时，ScrollView控件里的布局无法充满整个手机屏幕，通过阅读源码发现，ScrollView中有个mFillViewport属性：

When set to true, the scroll view measure its child to make it fill the currently visible area.

大概意思就是当mFillViewport设置为true的时候，其子视图能够自动填充满当前可见的整个区域。即，在xml布局文件中为ScrollView控件添加

android:fillViewport="true"

能使ScrollView里的元素填满整个ScrollView。

实例：

<?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:background="@color/white" android:gravity="center" android:orientation="vertical">

    <ScrollView  android:fillViewport="true" android:layout_width="match_parent" android:layout_height="match_parent">

        <LinearLayout  android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical">

            <LinearLayout  android:layout_width="match_parent" android:layout_height="0dp" android:layout_weight="1" android:gravity="center" android:orientation="vertical">

                <ImageView  android:layout_width="wrap_content" android:layout_height="wrap_content" android:src="@drawable/ic_logo2" />

                <TextView  style="@style/TextTitle" android:layout_width="wrap_content" android:layout_height="wrap_content" android:paddingTop="7dp" android:text="手机耕犊" />
            </LinearLayout>

            <LinearLayout  android:layout_width="match_parent" android:layout_height="0dp" android:layout_weight="1" android:orientation="vertical">

                <LinearLayout  android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="@dimen/activity_vertical_margin" android:orientation="vertical">

                    <LinearLayout  android:focusable="true" android:focusableInTouchMode="true" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginLeft="@dimen/activity_horizontal_margin" android:layout_marginRight="@dimen/activity_horizontal_margin" android:layout_marginTop="@dimen/activity_vertical_margin" android:orientation="horizontal">

                        <ImageView  android:layout_width="wrap_content" android:layout_height="match_parent" android:paddingLeft="20dp" android:src="@drawable/ic_phone" />

                        <EditText  android:id="@+id/login_telnum" android:layout_width="match_parent" android:layout_height="wrap_content" android:background="@null" android:hint="@string/pc_telnum" android:paddingLeft="15dp" android:singleLine="true" android:textColor="@color/text_title" android:textColorHint="@color/gray" android:textCursorDrawable="@null" android:textSize="@dimen/typeface_medium_16" />
                    </LinearLayout>

                    <View  android:layout_width="match_parent" android:layout_height="1dp" android:layout_marginBottom="30dp" android:layout_marginLeft="30dp" android:layout_marginTop="5dp" android:background="@color/bg_custom_gray" />

                    <LinearLayout  android:focusable="true" android:focusableInTouchMode="true" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginLeft="@dimen/activity_horizontal_margin" android:layout_marginRight="@dimen/activity_horizontal_margin" android:orientation="horizontal">

                        <ImageView  android:layout_width="wrap_content" android:layout_height="match_parent" android:paddingLeft="20dp" android:src="@drawable/ic_lock" />

                        <EditText  android:id="@+id/login_password" android:layout_width="match_parent" android:layout_height="wrap_content" android:background="@null" android:hint="@string/pc_password" android:paddingLeft="15dp" android:password="true" android:singleLine="true" android:textColor="@color/text_title" android:textColorHint="@color/gray" android:textCursorDrawable="@null" android:textSize="@dimen/typeface_medium_16" />
                    </LinearLayout>

                    <View  android:layout_width="match_parent" android:layout_height="1dp" android:layout_marginBottom="10dp" android:layout_marginLeft="30dp" android:layout_marginTop="5dp" android:background="@color/bg_custom_gray" />

                    <TextView  android:id="@+id/pc_forget_pwd" style="@style/TextLittle" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="30dp" android:text="@string/pc_forget_password" android:textColor="#20ac42" android:textSize="12dp" />
                </LinearLayout>

            </LinearLayout>

            <LinearLayout  android:layout_width="match_parent" android:layout_height="0dp" android:layout_weight="1" android:orientation="vertical">

                <LinearLayout  android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="30dp" android:orientation="vertical" android:paddingLeft="30dp" android:paddingRight="30dp">

                    <Button  android:id="@+id/pc_login" android:layout_width="match_parent" android:layout_height="@dimen/common_button_height" android:background="@drawable/bg_bt_rectangle_green2" android:text="@string/pc_login" android:textColor="@color/white" android:textSize="@dimen/typeface_medium_16" />

                </LinearLayout>

                <LinearLayout  android:layout_width="match_parent" android:layout_height="match_parent" android:gravity="bottom">

                    <TextView  android:id="@+id/pc_register" android:layout_width="match_parent" android:layout_height="@dimen/common_button_height" android:background="@color/bg_custom_gray" android:gravity="center" android:text="@string/pc_register" android:textColor="@color/gray" android:textSize="@dimen/typeface_small_14" />
                </LinearLayout>
            </LinearLayout>
        </LinearLayout>
    </ScrollView>
</LinearLayout>