A summary of resource file usage examples for Android development _android

This example summarizes the use of resource files for Android development. Share to everyone for your reference, specific as follows:

Here are a few of the things that are often used in Android development

Arrays.xml definition Array

Cases:

<resources>
  <!--share items--> 
  <string-array name= "App_share_items" >
    <item> Sina Weibo </item>
    <item> Tencent micro-blog </item>
  </string-array> 
</resources>

Solid rounded background

<shape xmlns:android= "Http://schemas.android.com/apk/res/android" >
  <solid android:color= "#4a90e2" >
  <corners android:radius= "95DP"/>
</shape>

Usage:

android:background= "@drawable/xml_background_button_blue"

The type to get this background is: drawable:gradientdrawable, we can change its color, and keep the background unchanged.

Color related

PS: 0 Transparent, 1 completely impervious
Android: Color format: ARGB alpha:[0,255] completely transparent to completely opaque
Pink: #8f0f

Uses-permission

When you play the window, add in manifest:

<uses-permission android:name= "Android.permission.SYSTEM_ALERT_WINDOW"/>

Correspondence between resource files and classes

Selector corresponds to StateList.

<?xml version= "1.0" encoding= "Utf-8"?> <selector xmlns:android=
"http://schemas.android.com/apk/res/" Android >
  <item android:state_pressed= "true" android:drawable= "@drawable/xml_login_button_press"/>
  <item android:drawable= "@drawable/xml_login_button_normal"/>
</selector>

<?xml version= "1.0" encoding= "Utf-8"?> <selector xmlns:android=
"http://schemas.android.com/apk/res/" Android ">
  <item android:state_pressed=" true ">
    <shape>
      <solid android:color=" @color /pressed_color "/>
    </shape>
  </item>
  <item>
    <shape>
      <solid Android:color= "@color/transparent"/>
    </shape>
  </item>
</selector>

The shape corresponds to the gradientdrawable.

<?xml version= "1.0" encoding= "Utf-8"?> <shape xmlns:android=
"http://schemas.android.com/apk/res/" Android ">
  <solid android:color=" #4a90e2 "/>
  <corners android:radius=" 95DP "/>
</ Shape>

Notification

1. Action associated with activity

The following two steps are indispensable
step1: Specify an Action constant:

public static final String Download_manager = "Com.james.app.download";

step2: Specify the corresponding intentfilter in the corresponding activity

<intent-filter>
  <action android:name= "com.james.app.download"/>
  <category android:name= " Android.intent.category.DEFAULT "/>
</intent-filter>

2. The notification is distinguished by action, not by ID.

For more information on Android-related content readers can view the site topics: "Android Resource Operation tips Summary", "Android Development introduction and Advanced Course", "Android Control Usage Summary", "Android SMS and telephone operating skills summary" and " Android Multimedia How-to Summary (audio, video, recording, etc.)

I hope this article will help you with the Android program.