Android应用的LinearLayout中嵌套RelativeLayout的布局用法

想将Button和ListView分别放在屏幕的一左一右。
单纯使用android:gravity和android:layout_gravity不成功。
于是涉及到RelativeLayout。
关键为：android:layout_alignParentRight="true"，
android:layout_alignParentLeft="true"：

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 <? xml version = "1.0" encoding = "utf-8" ?> < LinearLayout xmlns:android = "http://schemas.android.com/apk/res/android" android:orientation = "vertical" android:layout_width = "fill_parent" android:layout_height = "wrap_content" android:gravity = "center_vertical" > < TextView android:id = "@+id/mTextView" android:layout_width = "fill_parent" android:layout_height = "wrap_content" android:text = "@string/hello" /> < RelativeLayout android:layout_width = "wrap_content" android:layout_height = "wrap_content" android:gravity = "right" android:padding = "10dp" > < TextView android:id = "@+id/mTextView01" android:layout_alignParentLeft = "true" android:layout_width = "wrap_content" android:layout_height = "wrap_content" android:text = "范例一" /> < Button android:id = "@+id/mButton01" android:layout_alignParentRight = "true" android:layout_width = "wrap_content" android:layout_height = "wrap_content" android:text = "发送" /> RelativeLayout > < RelativeLayout android:layout_width = "wrap_content" android:layout_height = "wrap_content" android:gravity = "right" android:padding = "10dp" > < TextView android:id = "@+id/mTextView02" android:layout_alignParentLeft = "true" android:layout_width = "wrap_content" android:layout_height = "wrap_content" android:text = "范例二" /> < Button android:id = "@+id/mButton01" android:layout_alignParentRight = "true" android:layout_width = "wrap_content" android:layout_height = "wrap_content" android:text = "发送" /> RelativeLayout > LinearLayout >

效果为：

PS：另附我的项目布局的一点经验

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 <? xml version = "1.0" encoding = "utf-8" ?> < LinearLayout xmlns:android = "http://schemas.android.com/apk/res/android" android:layout_width = "fill_parent" android:layout_height = "fill_parent" android:orientation = "vertical" > < LinearLayout android:layout_width = "fill_parent" android:layout_height = "wrap_content" android:orientation = "horizontal" android:layout_marginLeft = "50px" android:layout_marginRight = "50px" android:layout_marginBottom = "15px" android:layout_gravity = "center" android:gravity = "center" > < TextView android:layout_width = "fill_parent" android:layout_height = "wrap_content" android:text = "性别" android:textSize = "18sp" android:layout_weight = "3" /> < RadioGroup android:id = "@+id/radioGroup" android:contentDescription = "性别" android:layout_width = "fill_parent" android:layout_height = "wrap_content" android:orientation = "horizontal" android:layout_weight = "1" > < RadioButton android:layout_width = "wrap_content" android:layout_height = "wrap_content" android:id = "@+id/radioMale" android:text = "男" android:checked = "true" android:layout_marginRight = "15px" android:textSize = "18sp" > RadioButton > < RadioButton android:layout_width = "wrap_content" android:layout_height = "wrap_content" android:id = "@+id/radioFemale" android:text = "女" android:textSize = "18sp" > RadioButton > RadioGroup > LinearLayout > LinearLayout >

开始时RadioGroup的layout_width="wrap_content"，怎么设置权都达不到想要的效果。要改成fill_parent
RadioButton的尺寸比TextView大所以显示时TextView在上方，设置LinearLayout中android:gravity="center">即可。

http://www.jb51.net/article/82360.htm

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