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新浪微博布局学习——活用RelativeLayout

正文

  一、效果图

    格子布局效果:

 居中正在加载的效果:

二、实现代码

    2.1  实现 图一 效果代码

            <RelativeLayout android:id="@id/rlDigest"

                android:background="@drawable/panel_bg" android:layout_width="fill_parent"

                android:layout_height="100.0dip" android:layout_margin="10.0dip">

                <TextView android:textSize="16.0sp" android:textColor="#ff7d899d"

                    android:gravity="center_vertical" android:id="@id/tvAddress"

                    android:layout_width="wrap_content" android:layout_height="wrap_content"

                    android:layout_marginLeft="5.0dip" android:layout_marginTop="10.0dip"

                    android:text="@string/userinfo_address"

                    android:layout_alignParentLeft="true"

                    android:layout_alignParentTop="true" />

                <TextView android:textSize="16.0sp" android:textColor="#ff373737"

                    android:id="@id/tvAddress_content" android:layout_width="wrap_content"

                    android:layout_height="wrap_content" android:layout_marginLeft="10.0dip"

                    android:layout_toRightOf="@id/tvAddress" android:layout_alignTop="@id/tvAddress" />

                <View android:id="@id/vHDivider" android:background="@drawable/horizontal_separation_line_repeat"

                    android:layout_width="fill_parent" android:layout_height="1.0dip"

                    android:layout_centerVertical="true" />

                    android:gravity="center_vertical" android:id="@id/tvAccount_info"

                    android:text="@string/account_info" android:layout_below="@id/vHDivider"

                    android:layout_alignLeft="@id/tvAddress"

                    android:layout_alignParentBottom="true" />

                    android:gravity="center_vertical" android:id="@id/tvAccount_info_content"

                    android:layout_marginLeft="10.0dip" android:layout_marginBottom="12.0dip"

                    android:singleLine="true" android:layout_toRightOf="@id/tvAccount_info"

                    android:layout_alignBottom="@id/tvAccount_info" />

            </RelativeLayout>

            <RelativeLayout android:background="@drawable/panel_bg"

                android:layout_width="fill_parent" android:layout_height="130.0dip"

                android:layout_margin="10.0dip">

                <View android:id="@id/vVDivider1" android:background="@drawable/vertical_separation_line_repeat"

                    android:layout_width="1.0dip" android:layout_height="fill_parent"

                    android:layout_centerHorizontal="true" />

                <View android:id="@id/vHDivider2" android:background="@drawable/horizontal_separation_line_repeat"

                <RelativeLayout android:id="@id/llAttention"

                    android:background="@drawable/bg_panel_above_left"

                    android:clickable="true" android:layout_width="wrap_content"

                    android:layout_height="wrap_content" android:layout_toLeftOf="@id/vVDivider1"

                    android:layout_above="@id/vHDivider2"

                    android:layout_alignParentTop="true">

                    <TextView android:gravity="center" android:id="@id/tvAttention_count"

                        android:layout_width="fill_parent" android:layout_height="wrap_content"

                        android:layout_marginTop="10.0dip" android:text="0"

                        android:layout_centerHorizontal="true"

                        style="@style/userinfo_panel_textview_count" />

                    <TextView android:gravity="center" android:id="@id/tvAttention"

                        android:text="@string/attention" android:layout_below="@id/tvAttention_count"

                        style="@style/userinfo_panel_textview_title" />

                </RelativeLayout>

                <LinearLayout android:orientation="vertical"

                    android:id="@id/rlWeibo" android:background="@drawable/bg_panel_above_right"

                    android:layout_height="wrap_content" android:layout_toRightOf="@id/vVDivider1"

                    android:layout_alignParentTop="true"

                    android:layout_alignParentRight="true">

                    <TextView android:gravity="center" android:layout_gravity="center_horizontal"

                        android:id="@id/tvWeibo_count" android:layout_width="fill_parent"

                        android:layout_height="wrap_content" android:layout_marginTop="10.0dip"

                        android:text="0" style="@style/userinfo_panel_textview_count" />

                        android:id="@id/tvTopic" android:layout_width="fill_parent"

                        android:layout_height="wrap_content" android:text="@string/radio_button_topic"

                </LinearLayout>

                    android:id="@id/llFans" android:background="@drawable/bg_panel_below_left"

                    android:layout_below="@id/vHDivider2"

                    android:layout_alignParentBottom="true">

                        android:id="@id/tvFans_count" android:layout_width="fill_parent"

                        android:id="@id/tvFans" android:layout_width="fill_parent"

                        android:layout_height="wrap_content" android:text="@string/fans"

                    android:id="@id/llTopic" android:background="@drawable/bg_panel_below_right"

                    android:layout_alignParentRight="true"

                        android:id="@id/tvTopic_count" android:layout_width="fill_parent"

                        android:layout_height="wrap_content" android:text="@string/his_topics"

      代码说明:

        2.1.1  第一个RelativeLayout为图一上的实现代码。注意使用了一个View,也就是一条横线,令其居中布局;"地址:"的TextView通过layout_alignParentLeft和layout_alignParentTop令其在整个RelativeLayout顶左顶上;"账号信息:"的TextView通过layout_below令其位于横线下方,layout_alignLeft令其与"地址:"的TextView左边对齐,然后用layout_alignParentBottom让其居于容器底部。

        2.1.2  第二个RelativeLayout为图一下的实现代码。关键是vVDivider1和vVDivider2,与3.1.1类似,画出了一个十字架的布局,然后分别用居左、居上、居下、居右等方式实现了该布局效果。

    2.2  实现 图二 效果代码

    <RelativeLayout android:id="@+id/rlpb"

        android:layout_width="fill_parent" android:background="#ffeff0f4"

        android:visibility="gone" android:layout_height="fill_parent"

        android:layout_weight="1.0">

        <LinearLayout android:layout_centerInParent="true"

            android:layout_width="wrap_content" android:layout_height="wrap_content">

            <ProgressBar android:id="@+id/prb"

                style="?android:attr/progressBarStyleSmallTitle"

                android:layout_width="wrap_content" android:layout_height="wrap_content" />

            <TextView android:text="@string/loadinfo"

        </LinearLayout>

    </RelativeLayout>

       代码说明:

        主要是layout_centerInParent属性的应用,令其居于RelativeLayout的中间。使用的时候领ListView先隐藏,然后让这个布局显示并填充,用完在设置Visible为GONE即可。

  三、总结

    熟练掌握以下重要属性,并灵活运用:

    android:layout_centerInParent   居中布局

android:layout_centerVertical    水平居中布局

android:layout_centerHorizontal  垂直居中布局

    android:layout_alignParentTop    居于容器内顶部

android:layout_alignParentBottom  居于容器内底部

android:layout_alignParentLeft    居于容器内左边

android:layout_alignParentRight    居于容器内右边

android:layout_above       居于指定View的上方

android:layout_below       居于指定View的下方

android:layout_toRightOf      在指定View的右边

android:layout_toLeftOf        在指定View的左边

android:layout_alignTop      与指定View的Top一致

本文转自over140 51CTO博客,原文链接:http://blog.51cto.com/over140/582146,如需转载请自行联系原作者

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