Access to user resources in Android (i)

These days to summarize the user resource access in Android development.

User resources in Android project in the Res folder, there are strings, colors, sizes, arrays, layouts, styles, themes and other resources, these resources can be referenced in the XML file, can also be used in the Android source files, today summed up the string, color, size, array, Layout and picture resources.

In general, the format referenced in the XML file is [<package>.] @/xxx/name; The reference format in the source code is [<package>.] R.xxx.name.

The code referenced in the XML file (in the layout XML file) and in the source code are pasted first.

Main.xml layout file <linearlayout xmlns:android= "Http://schemas.android.com/apk/res/android"      xmlns:tools= "Http://schemas.android.com/tools"     android:id= "@+id/ LinearLayout1 "    android:layout_width=" Match_parent "    android: layout_height= "match_parent"     android:orientation= "vertical"      tools:context= "Main.testresources.MainActivity"  >    <TextView         android:id= "@+id/tv1"          Android:layout_width= "wrap_content"         android:layout_height= "wrap _content "        android:textcolor=" @color/lor "         android:textsize= "@dimen/dim"          android:text= "@string/TV1"         android:background= "@drawable/ic_launcher"  />    <button          android:id= "@+id/btn1"          android:layout_width= "Wrap_content"         android: layout_height= "Wrap_content"         android:text= "@string/btn1"          android:textcolor= "@color/lor2"          android:textsize= "@dimen/dim2"         android:background= " @drawable/ic_launcher "/>    <!--  above adt 16.0, in some controls without text display, you need to add a function description, i.e.  android:contentdescription= "@string/jieshao"; android:src= "@drawable/test" is to set the picture display  -->     <imageview         android:id= "@+id/iv1"       &nbSp;  android:layout_width= "Wrap_content"         android: layout_height= "Wrap_content"         android:contentdescription= "@ String/jieshao "        android:src=" @drawable/test "/>     <!--  Referencing an external layout file, which adds an external layout file to the layout file and becomes part of the layout file name layout_test.xml-->     <include layout= "@layout/layout_test"  />    </LinearLayout>

Layout_test.xml layout file for Main.xml file call <?xml version= "1.0"  encoding= "Utf-8"? ><linearlayout  xmlns:android= "Http://schemas.android.com/apk/res/android"     android:id= "@+id/ LinearLayout1 "    android:layout_width=" Match_parent "    android: layout_height= "match_parent"     android:orientation= "Horizontal"  >         <Button             android:id= "@+id/button1"              Android:layout_width= "Wrap_content"              android:layout_height= "Wrap_content"              android:text= "@string/button1"  />        <Button         &nBsp;   android:id= "@+id/button2"              android:layout_width= "Wrap_content"              android:layout_height= "Wrap_content"              android:text= "@string/button2"  /></LinearLayout>

Android source file public class mainactivity extends actionbaractivity implements  onclicklistener{    protected textview tv1=null;     protected button btn1=null;    protected int num=0;     protected StringBuffer stringBuffer=null;    protected String[]  arr=new string[3];    protected string str=null;     protected int col=0;    protected float dim=0;     protected imageview iv=null;         @SuppressLint ("NewApi")   @Override     protected void oncreate (bundle savedinstancestate)   {        super.oncreate (savedinstancestate);         setcoNtentview (R.layout.activity_main);//referencing the layout file and loading the display                  tv1= (TextView) Findviewbyid (R.ID.TV1);         btn1= (Button) Findviewbyid (R.ID.BTN1);         iv= (ImageView ) Findviewbyid (R.ID.IV1);                 str=getresources (). getString (R.STRING.TV1);//Get string Resources          tv1.settext (str);                 col=getresources (). GetColor (R.color.lor);//Get Color resources          Btn1.settextcolor (col);//Set text display color         btn1.setbackgroundcolor (COL) ;//Set button background color                 dim =getresources (). getdimenSion (R.dimen.dim);//Get Size Resource         btn1.settextsize (dim);//Set display text size                 arr= Getresources (). Getstringarray (R.array.world);//Get Array Resources          Btn1.settext (arr[0]);//Take the first element of the array as a button to display the text                  tv1.setbackground (Getresources (). getdrawable (R.drawable.ic_launcher));//obtain picture resources, and set the background image         iv.setimageresource (r.drawable.test);//Set Display picture          btn1.setonclicklistener (mainactivity.this);     }

(1), string resource

Existence position:/res/values/strings.xml, root element is <resources></resources>, with <string></string> tag, the following code:

<?xml version= "1.0" encoding= "Utf-8"?><resources> <string name= "App_name" >testresources</ string> <string name= "Hello_world" >hello world!</string> <string name= "Action_settings" >Settin gs</string> <string name= "TV1" > First </string> <string name= "BTN1" > Point I Toggle Show </string></ Resources>

(2), color resources

Existence position:/res/values/colors.xml, root element is <resources></resources>, with <color></color> tag, the following code

<?xml version= "1.0" encoding= "Utf-8"?><resources> <!--translucent, red-and <color name= "Lor" > #66ff000 0</color> <!--translucent, green-to <color name= "Lor2" > #6600ff00 </color></resources>

(3), size resources

Existence position:/res/values/dimens.xml, root element is <resources></resources>, with <dimen></dimen> tag, the following code

<resources> <!--Default screen margins, per the Android Design guidelines. --<dimen name= "Activity_horizontal_margin" >16dp</dimen> <dimen name= "Activity_vertical_margin" >16dp</dimen> <dimen name= "Dim" >30dp</dimen> <dimen Name= "dim2" >40dp</dimen></ Resources>

(4), array resources

Existence position:/res/values/arrays.xml, root element is <resources></resources>, with <integer-array></integer-array > or <string-array></string-array> tags, the following code

<?xml version= "1.0" encoding= "Utf-8"?><resources> <integer-array name= "Hello" > <item >1& lt;/item> <item >2</item> <item >3</item> </integer-array> <string -array name= "World" > <item >one</item> <item >two</item> <item >thre E</item> </string-array></resources>

(5), Layout file resources

Existence Position:/res/layout/xxx.xml, the root element is variable, generally is <linearlayout></linearlayout>, labeled with each component node, see the layout XML file posted above

(6), picture resources

Existence location:/res/drawable-xxxx/picture name, non-XML file

Access to user resources in Android (i)