shape等特殊xml

1.用 shape 作为背景

<shape xmlns:android="http://schemas.android.com/apk/res/android">
<solid android:color="#f0600000"/>
<stroke android:width="3dp" color="#ffff8080"/>
<corners android:radius="3dp" />
<padding android:left="10dp" android:top="10dp"
android:right="10dp" android:bottom="10dp" />
</shape>

一定要注意solid android:color="#f0600000" 是背景色要用8位最好不要完全透明不然没有效果啊这句话本来就不是背景色的意思

2.类似多选的效果：
(1)

listView.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);

listView.setItemsCanFocus(false);
（2） define list item
CheckedTextView xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="?android:attr/listPreferredItemHeight"
android:textAppearance="?android:attr/textAppearanceLarge"
android:gravity="center_vertical"
android:paddingLeft="6dip"
android:paddingRight="6dip"
android:checkMark="?android:attr/listChoiceIndicatorMultiple"
android:background="@drawable/txt_view_bg"/>
(3) define drawable txt_view_bg.xml <item android:drawable="@drawable/selected" android:state_checked="true" /> <item android:drawable="@drawable/not_selected" />

3.
<LinearLayout android:layout_width ="100dp" android:layout_height="wrap_content" />
LinearLayour ll = new LinearLayout(this);parentView.addView(ll, new LinearLayout.LayoutParams(100, LayoutParams.WRAP_CONTENT));

4. 当设置 TextView setEnabled(false)时背景颜色你如果用#ffff之类的话可能不会显示你最好使用 android:textColor这个属性而不是使用color。
<TextView android:text="whatever text you want" android:layout_width="wrap_content" android:layout_height="wrap_content" android:textColor="@color/example" />

res/color/example.xml):

<?xml version="1.0" encoding="utf-8"?><selector xmlns:android="http://schemas.android.com/apk/res/android"> <item android:state_enabled="false" android:color="@color/disabled_color" /> <item android:color="@color/normal_color"/></selector>

http://developer.android.com/intl/zh-CN/reference/android/content/res/ColorStateList.html

5.
http://android.amberfog.com/?p=9
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item>
<shape>
<solid android:color="#FFF8F8F8" />
</shape>
</item>
<item android:top="23px">
<shape>
<solid android:color="#FFE7E7E8" />
</shape>
</item>
</layer-list>
You can simple combine several drawables into one using <layer-list> tag.
note: Unfortenately you cannot resize drawables in layer-list. You can only move it.

<layer-list xmlns:android="http://schemas.android.com/apk/res/android"> <item android:drawable="@drawable/shape_below"/> <item android:top="10px" android:right="10px" android:drawable="@drawable/shape_cover"/></layer-list>

include
You can put similar layout elements into separate XML and use <include> tag to use it.
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="64dip"
android:gravity="center_vertical"
android:ignoreGravity="@+id/icon">

<include layout="@layout/track_list_item_common" />;

</RelativeLayout>

track_list_item_common.xml
<merge xmlns:android="http://schemas.android.com/apk/res/android">

<ImageView android:id="@+id/icon"
android:layout_alignParentLeft="true"
android:layout_centerVertical="true"
android:layout_marginLeft="4dip"
android:layout_width="60px"
android:layout_height="60px"/>
...
</merge>

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