Android 自定义view实现TopBar效果

<?xml version="1.0" encoding="utf-8"?> 
<relativelayout xmlns:android="http://schemas.android.com/apk/res/android" 
  xmlns:tools="http://schemas.android.com/tools" 
  android:id="@+id/activity_main" 
  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.bwie.test.mainactivity"> 
 
  <com.bwie.test.myview 
    xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:lt="http://schemas.android.com/apk/res-auto" 
    android:id="@+id/titlebar" 
    android:layout_width="match_parent" 
    android:layout_height="60dp" 
    lt:leftbuttontext="返回" 
    lt:leftbuttontextcolor="@android:color/white" 
    lt:leftbuttontextsize="8sp" 
    lt:buttonbgcolor="#4556ec" 
    lt:titletext="标题" 
    lt:titlecolor="@android:color/white" 
    lt:titlesize="8sp" 
    lt:rightbuttontext="完成" 
    lt:rightbuttontextcolor="@android:color/white" 
    lt:rightbuttontextsize="8sp" 
    android:background="#47ea10" 
    android:padding="10sp" 
    > 
  </com.bwie.test.myview> 
</relativelayout> 

<?xml version="1.0" encoding="utf-8"?> 
<resources> 
  <declare-styleable name="titlebar"> 
    <attr name="leftbuttontext" format="string|reference"></attr> 
    <attr name="leftbuttontextcolor" format="color|reference"></attr> 
    <attr name="leftbuttontextsize" format="dimension|reference"></attr> 
    <attr name="leftbuttonimage" format="color|reference"></attr> 
    <attr name="buttonbgcolor" format="color"/> 
 
    <attr name="titletext" format="string|reference"></attr> 
    <attr name="titlecolor" format="color|reference"></attr> 
    <attr name="titlesize" format="dimension|reference"></attr> 
 
    <attr name="rightbuttontext" format="string|reference"></attr> 
    <attr name="rightbuttontextcolor" format="color|reference"></attr> 
    <attr name="rightbuttontextsize" format="dimension|reference"></attr> 
    <attr name="rightbuttonimage" format="color|reference"></attr> 
 
 
  </declare-styleable> 
 
</resources> 

public class myview extends relativelayout{ 
 
  private string mleftbuttontext; 
  private int mleftbuttontextcolor; 
  private float mleftbuttonsize; 
  private drawable mleftbuttonimage; 
  private string mtitlebuttontext; 
  private int mtitlebuttontextcolor; 
  private float mtitlebuttonsize; 
  private string mrightbuttontext; 
  private int mrightbuttontextcolor; 
  private float mrightbuttonsize; 
  private drawable mrightbuttonimage; 
  private textview mrighttextview; 
  private textview titletextview; 
  private imageview mleftbutton; 
  private textview mlefttextview; 
  private imageview mrightbutton; 
  int buttonbgcolor; 
  public myview(context context) { 
    this(context,null); 
  } 
 
  public myview(context context, attributeset attrs) { 
    this(context, attrs,0); 
    typedarray typedarray = context.obtainstyledattributes(attrs, r.styleable.titlebar); 
    buttonbgcolor = typedarray.getcolor(r.styleable.titlebar_buttonbgcolor,color.blue); 
 
//左侧的按钮 
    mleftbuttontext = typedarray.getstring(r.styleable.titlebar_leftbuttontext); 
    mleftbuttontextcolor = typedarray.getcolor(r.styleable.titlebar_leftbuttontextcolor, color.gray); 
    mleftbuttonsize = typedarray.getdimension(r.styleable.titlebar_leftbuttontextsize, typedvalue.applydimension(typedvalue.complex_unit_sp, 16, getresources().getdisplaymetrics())); 
    mleftbuttonimage = typedarray.getdrawable(r.styleable.titlebar_leftbuttonimage); 
//中间的按钮 
    mtitlebuttontext = typedarray.getstring(r.styleable.titlebar_titletext); 
    mtitlebuttontextcolor = typedarray.getcolor(r.styleable.titlebar_titlecolor, color.gray); 
    mtitlebuttonsize = typedarray.getdimension(r.styleable.titlebar_titlesize, typedvalue.applydimension(typedvalue.complex_unit_sp, 16, getresources().getdisplaymetrics())); 
//右侧的按钮 
    mrightbuttontext = typedarray.getstring(r.styleable.titlebar_rightbuttontext); 
    mrightbuttontextcolor = typedarray.getcolor(r.styleable.titlebar_rightbuttontextcolor, color.gray); 
    mrightbuttonsize = typedarray.getdimension(r.styleable.titlebar_rightbuttontextsize, typedvalue.applydimension(typedvalue.complex_unit_sp, 16, getresources().getdisplaymetrics())); 
    mrightbuttonimage = typedarray.getdrawable(r.styleable.titlebar_rightbuttonimage); 
 
    typedarray.recycle();//回收 
    /*调用方法*/ 
    initview(context); 
  } 
 
  public myview(context context, attributeset attrs, int defstyleattr) { 
    this(context, attrs, defstyleattr,0); 
  } 
 
  public myview(context context, attributeset attrs, int defstyleattr, int defstyleres) { 
    super(context, attrs, defstyleattr, defstyleres); 
  } 
  /*构建按钮*/ 
  private void initview(context context) { 
 
    if(mleftbuttonimage == null & mleftbuttontext != null){ 
      // 当用户没有设置左侧按钮图片并设置了左侧的按钮文本属性时--添加左侧文本按钮 
      mlefttextview = new textview(context); 
      mlefttextview.settext(mleftbuttontext); 
      mlefttextview.settextcolor(mleftbuttontextcolor); 
      mlefttextview.settextsize(mleftbuttonsize); 
      mlefttextview.setbackgroundcolor(buttonbgcolor); 
      relativelayout.layoutparams leftparams = new relativelayout.layoutparams(layoutparams.wrap_content, layoutparams.wrap_content); 
      leftparams.addrule(relativelayout.align_parent_left); 
      leftparams.addrule(relativelayout.center_vertical); 
      addview(mlefttextview, leftparams); 
    }else if(mleftbuttonimage != null){ 
      // 添加左侧图片按钮 
      relativelayout.layoutparams leftparams = new relativelayout.layoutparams(layoutparams.wrap_content, layoutparams.wrap_content); 
      leftparams.addrule(relativelayout.align_parent_left); 
      leftparams.addrule(relativelayout.center_vertical); 
      mleftbutton = new imageview(context); 
      mleftbutton.setimagedrawable(mleftbuttonimage); 
      addview(mleftbutton, leftparams); 
    } 
 
    if(mtitlebuttontext!=null){ 
      // 添加中间标题 
      titletextview = new textview(context); 
      titletextview.settext(mtitlebuttontext); 
      titletextview.settextcolor(mtitlebuttontextcolor); 
      titletextview.settextsize(mtitlebuttonsize); 
      relativelayout.layoutparams titletextviewparams = new relativelayout.layoutparams(layoutparams.wrap_content, layoutparams.wrap_content); 
      titletextviewparams.addrule(relativelayout.center_in_parent); 
      addview(titletextview,titletextviewparams); 
    } 
 
    if(mrightbuttonimage == null & mrightbuttontext != null){ 
      // 当用户没有设置右侧按钮图片并设置了左侧的按钮文本属性时--添加右侧文本按钮 
      mrighttextview = new textview(context); 
      mrighttextview.settext(mrightbuttontext); 
      mrighttextview.settextcolor(mrightbuttontextcolor); 
       mrighttextview.settextsize(mrightbuttonsize); 
      mrighttextview.setbackgroundcolor(buttonbgcolor); 
      relativelayout.layoutparams rightparams = new relativelayout.layoutparams(layoutparams.wrap_content, layoutparams.wrap_content); 
      rightparams.addrule(relativelayout.align_parent_right); 
      rightparams.addrule(relativelayout.center_vertical); 
      addview(mrighttextview,rightparams); 
    }else if(mrightbuttonimage != null){ 
      // 添加右侧图片按钮 
      relativelayout.layoutparams rightparams = new relativelayout.layoutparams(layoutparams.wrap_content, layoutparams.wrap_content); 
      rightparams.addrule(relativelayout.align_parent_right); 
      rightparams.addrule(relativelayout.center_vertical); 
      mrightbutton = new imageview(context); 
      mrightbutton.setimagedrawable(mrightbuttonimage); 
      addview(mrightbutton, rightparams); 
    } 
  } 
  /*监听事件*/ 
  public interface onbuttonclicklistener{ 
    void onleftclick(); 
    void onrightclick(); 
  } 
  /*点击事件*/ 
  public void setonbuttonclicklistener(final onbuttonclicklistener onbuttonclicklistener) { 
    if(onbuttonclicklistener !=null){ 
      if(mlefttextview != null){ 
        mlefttextview.setonclicklistener(new onclicklistener() { 
          @override 
          public void onclick(view v) { 
            onbuttonclicklistener.onleftclick(); 
          } 
        }); 
      } 
      /*按钮*/ 
      if(mleftbutton != null){ 
        mleftbutton.setonclicklistener(new onclicklistener() { 
          @override 
          public void onclick(view v) { 
            onbuttonclicklistener.onleftclick(); 
          } 
        }); 
      } 
      if(mrighttextview != null){ 
        mrighttextview.setonclicklistener(new onclicklistener() { 
          @override 
          public void onclick(view v) { 
            onbuttonclicklistener.onrightclick(); 
          } 
        }); 
      } 
      /*按钮*/ 
      if(mrightbutton != null){ 
        mrightbutton.setonclicklistener(new onclicklistener() { 
          @override 
          public void onclick(view v) { 
            onbuttonclicklistener.onrightclick(); 
          } 
        }); 
      } 
    } 
  } 

public class mainactivity extends appcompatactivity { 
 
  @override 
  protected void oncreate(bundle savedinstancestate) { 
    super.oncreate(savedinstancestate); 
    setcontentview(r.layout.activity_main); 
 
    /*找到控件*/ 
    myview myview = (myview) findviewbyid(r.id.titlebar); 
    /*点击事件*/ 
    myview.setonbuttonclicklistener(new myview.onbuttonclicklistener() { 
      @override 
      public void onleftclick() { 
        toast.maketext(mainactivity.this,"左侧按钮被点击了",toast.length_short).show(); 
      } 
 
      @override 
      public void onrightclick() { 
        toast.maketext(mainactivity.this,"右侧按钮被点击了",toast.length_short).show(); 
      } 
    }); 
 
  } 
}