Shulou(Shulou.com)06/02 Report--

In this issue, the editor will bring you what are the application skills of Android. The article is rich in content and analyzes and narrates it from a professional point of view. I hope you can get something after reading this article.

Writing Android in the simulator can help us achieve many of the functions we want. In practical application, we can accumulate experience and sum up various skills to facilitate our application. Here is a detailed summary of several commonly used Android application skills.

The use of 1.Drawable

Drawable most often handles things that are drawn to the screen as a type of resource recycling; the Drawable class provides a generic API to handle a basic visual resource that can take many forms. (it's a little abstract) to put it bluntly, it is to get the parameters under res.

Example: change TextView text color-quote Drawable color Changshu and background color

Color.xml under values

Xml code

< ?xml version="1.0" encoding="utf-8" ?>

< resources>

< drawable name="darkgray">

# 808080FF

< /drawable>

< drawable name="white">

# FFFFFFFF

< /drawable>

< /resources>

< ?xml version="1.0" encoding="utf-8" ?>

< resources>

< drawable name="darkgray">

# 808080FF

< /drawable>

< drawable name="white">

# FFFFFFFF

< /drawable>

< /resources>

Set the background color of the text box

Java code

Resources resources =

GetBaseContext () .getResources ()

Drawable HippoDrawable =

Resources.getDrawable (R.drawable.white)

MTextView01.setBackgroundDrawable (HippoDrawable)

Resources resources = getBaseContext () .getResources ()

Drawable HippoDrawable =

Resources.getDrawable (R.drawable.white)

MTextView01.setBackgroundDrawable (HippoDrawable)

two。 Get the screen size of the phone

Java code

DisplayMetrics dm = new DisplayMetrics (); getWindowManager (). GetDefaultDisplay (). GetMetrics (dm); Stirng width = dm.widthPixels; Stirng heiht = dm.heightPixels; DisplayMetrics dm = new DisplayMetrics (); getWindowManager (). GetDefaultDisplay (). GetMetrics (dm); Stirng width = dm.widthPixels; Stirng heiht = dm.heightPixels

3.Android style mechanism

Just add a Style. Can a Style realize the display style of the control? Android's Style mechanism is really powerful.

Example:

Xml code

< ?xml version="1.0" encoding="utf-8" ?>

-

< resources>

-

< style name="DavidStyleText1">

< item name="android:textSize">

18sp

< /item>

< item name="android:textColor">

# EC9237

< /item>

< /style>

-

< style name="DavidStyleText2">

< item name="android:textSize">

14sp

< /item>

< item name="android:textColor">

# FF7F7C

< /item>

< item name="android:fromAlpha">

0.0

< /item>

< item name="android:toAlpha">

0.0

< /item>

< /style>

< /resources>

< ?xml version="1.0" encoding="utf-8" ?>

-

< resources>

-

< style name="DavidStyleText1">

< item name="android:textSize">

18sp

< /item>

< item name="android:textColor">

# EC9237

< /item>

< /style>

-

< style name="DavidStyleText2">

< item name="android:textSize">

14sp

< /item>

< item name="android:textColor">

# FF7F7C

< /item>

< item name="android:fromAlpha">

0.0

< /item>

< item name="android:toAlpha">

0.0

< /item>

< /style>

< /resources>

Xml code

< ?xml version="1.0" encoding="utf-8" ?>

-

< LinearLayout xmlns:android= "http://schemas.android.com/apk/res/android" android:background="@drawable/white" android:orientation= "vertical" android:layout_width="fill_parent" android:layout_height="fill_parent">

-

< !-- 应用模式1的TextView -->

< TextView style="@style/DavidStyleText1" android:layout_width="fill_parent" android:layout_height= "wrap_content" android:gravity="center_vertical| center_horizontal" android:text="@string/str_text_view1" />

-

< !-- 应用模式2的TextView -->

< TextView style="@style/DavidStyleText2" android:layout_width="fill_parent" android:layout_height= "wrap_content" android:gravity="center_vertical| center_horizontal" android:text="@string/str_text_view2" />

< /LinearLayout>

These are the Android application skills that Xiaobian shared with you. If you happen to have similar doubts, you might as well refer to the above analysis to understand. If you want to know more about it, you are welcome to follow the industry information channel.

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