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Most people do not understand the knowledge points of this article "how to customize xml attributes in Android", so the editor summarizes the following contents, detailed contents, clear steps, and has a certain reference value. I hope you can get something after reading this article. Let's take a look at this "how to customize xml attributes in Android" article.

1. First create a new android application.

two。 Create an attribute

Create an attr.xml file under res/values/ and define the required attributes

3. Create a custom View

Create a View that CustomView inherits from View (depending on the situation, if the requirement is not much different from the existing widget or layout, inherit and rewrite some methods)

Package com.hualu.androidview; import android.content.Context; import android.content.res.TypedArray; import android.graphics.Canvas; import android.graphics.Paint; import android.util.AttributeSet; import android.view.View; public class CustomView extends View {private Paint p = null; private String text = null; public CustomView (Context context) {super (context); initCustomView () } public CustomView (Context context, AttributeSet attrs) {super (context, attrs); initCustomView (); TypedArray a = context.obtainStyledAttributes (attrs,R.styleable.custom); int indexCount = a.getIndexCount (); for (int I = 0; I < indexCount; I + +) {int index = a.getIndex (I) Switch (index) {case R.styleable.custom_text: text = a.getString (index); break; case R.styleable.custom_size: p.setTextSize (a.getInt (index, 0)); break Case R.styleable.custom_color: p.setColor (a.getColor (index, 0xFF000000)); break;}} a.recycle ();} void initCustomView () {p = new Paint (); p.setAntiAlias (true);} @ Override protected void onDraw (Canvas canvas) {super.onDraw (canvas); canvas.drawText (text, 10,10, p);}}

4. Use custom view in layout files

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