<?xml version="1.0" encoding="utf-8"?>
<resources>
 
 <declare-styleable name="TopBar" >
  <attr name="topbar_left_icon" format="reference" />
  <attr name="topbar_right_icon" format="reference" />
 </declare-styleable>
</resources>

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
 android:layout_margin="6dp"
 android:layout_width="match_parent"
 android:layout_height="wrap_content">
 
 <ImageView
  android:id="@+id/topbar_left_img"
  android:layout_marginLeft="6dp"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content" />
 
 <ImageView
  android:id="@+id/topbar_right_img"
  android:layout_marginRight="20dp"
  android:layout_alignParentRight="true"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content" />
 
</RelativeLayout>

package com.crazy.gemi.ui.topbar;
 
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.util.Log;
import android.view.View;
import android.widget.ImageView;
import android.widget.RelativeLayout;
 
import com.crazy.gemi.R;
 
public class TopBar extends RelativeLayout {
 
 private Drawable draw_left;
 private Drawable draw_right;
 
 public TopBar(Context context) {
  this(context, null);
 }
 
 public TopBar(Context context, AttributeSet attrs) {
  this(context, attrs, 0);
 }
 
 public TopBar(Context context, AttributeSet attrs, int defStyleAttr) {
  super(context, attrs, defStyleAttr);
 
  init(attrs, defStyleAttr);
 }
 
 private void init(AttributeSet attrs, int defStyleAttr) {
  // 系統(tǒng)提供了 TypedArray 來(lái)獲取自定義的屬性集
  TypedArray typedArray = null;
 
  try {
   typedArray = getContext().obtainStyledAttributes(attrs, R.styleable.TopBar,defStyleAttr,-1);
 
   draw_left = typedArray.getDrawable(R.styleable.TopBar_topbar_left_icon);
   draw_right = typedArray.getDrawable(R.styleable.TopBar_topbar_right_icon);
  } finally {
   // 獲取完所有的屬性值后要回收資源
   typedArray.recycle();
  }
 
  View view = View.inflate(getContext(), R.layout.topbar_layout, this);
 
  ImageView imgLeft = (ImageView)view.findViewById(R.id.topbar_left_img);
  ImageView imgRight = (ImageView)view.findViewById(R.id.topbar_right_img);
 
  imgLeft.setImageDrawable(draw_left);
  imgRight.setImageDrawable(draw_right);
 }
}

// 為組件設(shè)置相應(yīng)的布局元素(左邊)
 LayoutParams leftParams = new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
 leftParams.addRule(RelativeLayout.ALIGN_PARENT_LEFT, TRUE);
// 添加到 ViewGroup
 addView(imgLeft, leftParams);
 
 // 為組件設(shè)置相應(yīng)的布局元素（右邊）
 LayoutParams rightParams = new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
 leftParams.addRule(RelativeLayout.ALIGN_PARENT_LEFT, TRUE);
// 添加到 ViewGroup
 addView(imgRight,rightParams);

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:tools="http://schemas.android.com/tools"
 xmlns:custom="http://schemas.android.com/apk/res-auto"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 tools:context="com.crazy.gemi.ui.pocket.PocketFragment">
 
 <com.crazy.gemi.ui.topbar.TopBar
  android:id="@+id/pocket_top_bar"
  android:background="@drawable/bg_cheaper_fg"
  android:layout_width="match_parent"
  android:layout_height="wrap_content"
  custom:topbar_left_icon="@drawable/pocket_logo"
  custom:topbar_right_icon="@drawable/abc_btn_radio_to_on_mtrl_015"/>
 
 <com.warmtel.expandtab.ExpandPopTabView
  android:id="@+id/fg_pocket_expandtab_view"
  android:layout_below="@id/pocket_top_bar"
  android:layout_width="match_parent"
  android:layout_height="wrap_content"
  custom:tab_toggle_btn_bg="@drawable/bg_expa_near"
  custom:tab_toggle_btn_font_color="@android:color/black"/>
 
 <ImageView
  android:id="@+id/fg_pocket_img"
  android:layout_below="@id/fg_pocket_expandtab_view"
  android:scaleType="centerCrop"
  android:src="@drawable/pocket_bg"
  android:layout_width="match_parent"
  android:layout_height="match_parent" />
 
</RelativeLayout>