                        课程
                    
                        /移动开发
                        
                            /Android
                        
                        /Android UI模板设计

不能识别自定义控件中的属性，自定义控件的三个子控件也不能正常显示？

package com.jia.mytopbar;

import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.view.Gravity;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.RelativeLayout;
import android.widget.TextView;

/**
* Created by Administrator on 2016/8/29.
*/
public class TopBar extends RelativeLayout {

private Button leftButton,rightButton;
private TextView tvTitle;

private int leftTextColor;
private Drawable leftBackground;
private String leftText;
private int rightTextColor;
private Drawable rightBackground;
private String rightText;
private float centerTitleTextSize;
private int centerTitleTextColor;
private String centerTitle;

private LayoutParams leftParams,rightParams,centerTitleParams;

//重写构造方法
public TopBar(Context context, AttributeSet attrs) {
super(context, attrs);
//取值
TypedArray ta = context.obtainStyledAttributes(attrs,R.styleable.TopBar);

leftTextColor = ta.getColor(R.styleable.TopBar_leftTextColor,0);
leftBackground = ta.getDrawable(R.styleable.TopBar_leftBackground);
leftText = ta.getString(R.styleable.TopBar_leftText);

rightTextColor = ta.getColor(R.styleable.TopBar_rightTextColor,0);
rightBackground = ta.getDrawable(R.styleable.TopBar_rightBackground);
rightText = ta.getString(R.styleable.TopBar_rightText);

centerTitleTextSize = ta.getDimension(R.styleable.TopBar_centerTitleTextSize, 0);
centerTitleTextColor = ta.getColor(R.styleable.TopBar_centerTitleTextColor, 0);
centerTitle = ta.getString(R.styleable.TopBar_centerTitle);

ta.recycle();
//组合模式，定义已有组件，拼合
leftButton = new Button(context);
rightButton = new Button(context);
tvTitle = new TextView(context);

leftButton.setTextColor(leftTextColor);
leftButton.setBackground(leftBackground);
leftButton.setText(leftText);

rightButton.setTextColor(rightTextColor);
rightButton.setBackground(rightBackground);
rightButton.setText(rightText);

tvTitle.setText(centerTitle);
tvTitle.setTextColor(centerTitleTextColor);
tvTitle.setTextSize(centerTitleTextSize);
tvTitle.setGravity(Gravity.CENTER);

setBackgroundColor(0xFFF59563);

//把一个控件添加到ViewGroup
leftParams = new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,LayoutParams.MATCH_PARENT);
leftParams.addRule(RelativeLayout.ALIGN_PARENT_LEFT,TRUE);
addView(leftButton,leftParams);

rightParams = new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,LayoutParams.MATCH_PARENT);
rightParams.addRule(RelativeLayout.ALIGN_PARENT_RIGHT,TRUE);
addView(rightButton,rightParams);

centerTitleParams = new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,LayoutParams.MATCH_PARENT);
centerTitleParams.addRule(RelativeLayout.CENTER_IN_PARENT,TRUE);
addView(tvTitle,centerTitleParams);

}
}

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:custom="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.jia.mytopbar.MainActivity">

    <com.jia.mytopbar.TopBar

        android:id="@+id/topbar"
        android:layout_width="match_parent"
        android:layout_height="40dp">
        custom:leftBackground="#ff08dd55"
        custom:leftText="Back"
        custom:leftTextColor="#ffffff"
        custom:rightBackground="#ff08dd55"
        custom:rightText="Back"
        custom:rightTextColor="#ffffff"
        custom:centerTitle="自定义标题"
        custom:centerTitleTextColor="#123456"
        custom:titleTextSize="16sp"
    </com.jia.mytopbar.TopBar>
</RelativeLayout>

<?xml version="1.0" encoding="utf-8"?>
<resources>
<declare-styleable name="TopBar">
<attr name="centerTitle" format="string" />
<attr name="centerTitleTextSize" format="dimension" />
<attr name="centerTitleTextColor" format="color" />
<attr name="leftTextColor" format="color" />
<attr name="leftBackground" format="reference|color" />
<attr name="leftText" format="string" />
<attr name="rightTextColor" format="color" />
<attr name="rightBackground" format="reference|color" />
<attr name="rightText" format="string" />
</declare-styleable>
</resources>