android自定义组件

source code:

import android.content.Context;
import android.content.res.TypedArray;
import android.util.AttributeSet;
import android.widget.LinearLayout;
import android.widget.TextView;

public class MyView extends LinearLayout {

    public MyView(Context context, AttributeSet attrs) {
        super(context, attrs);
        TypedArray typedArray=context.obtainStyledAttributes(attrs, R.styleable.MyViewText);
        TextView textView=new TextView(context);
       
        int count=typedArray.getIndexCount();
        for (int i = 0; i < count; i++) {
            int attr=typedArray.getIndex(i);
            switch (attr) {
            case R.styleable.MyViewText_Text:
                int resource=typedArray.getResourceId(R.styleable.MyViewText_Text, 0);
                System.out.println(resource);
                if(resource>0){//通过引用设值方式
                    textView.setText(typedArray.getResources().getText(resource));
                }else{//通过直接设值方式
                    textView.setText(typedArray.getString(R.styleable.MyViewText_Text));
                }
                break;
            default:
                break;
            }
        }
        addView(textView);
        System.out.println("getChildCount:"+getChildCount());
        System.out.println(getChildAt(0));
        setBackgroundColor(0xaa00aa);
        typedArray.recycle();
    }

}

layout code:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    xmlns:app="http://schemas.android.com/apk/res/com.zhonghong.tsp.share"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >
    <view class="com.demo.view.MyView" android:layout_width="wrap_content" android:layout_height="wrap_content" app:Text="@string/app_name">
        <ImageView android:layout_width="wrap_content" android:layout_height="wrap_content" android:src="@drawable/ic_launcher"/>
    </view>
    <ImageView android:layout_width="wrap_content" android:layout_height="wrap_content" android:src="@drawable/ic_launcher"/>
</RelativeLayout>

attrs.xml code

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <declare-styleable name="MyViewText">

             <!--同时兼容两种设值方式-->
        <attr name="Text" format="reference|string"></attr>
    </declare-styleable>
</resources>