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databinding使用include完美封装标题栏，扩展性强_include databinding

作者：繁依Fanyi0 | 2024-03-27 00:36:11

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include databinding

接下来跟我一起动手封装标题栏，废话不多说，走起！！！

1.build.gradle下添加（哪个module需databinding就在对应的build.gradle下添加）：

  1. android {
  2.     dataBinding {
  3.         enabled = true
  4.     }
  5. …………………………
  6. }

2.标题栏xml布局如下：

  1. <?xml version="1.0" encoding="utf-8"?>
  2.  
  3. <layout xmlns:android="http://schemas.android.com/apk/res/android"
  4.     xmlns:app="http://schemas.android.com/apk/res-auto">
  5.  
  6.     <android.support.constraint.ConstraintLayout
  7.         android:id="@+id/title_bar"
  8.         android:layout_width="match_parent"
  9.         android:layout_height="48dp"
  10.         android:background="@color/black">
  11.  
  12.         <TextView
  13.             android:id="@+id/tv_public_back"
  14.             android:layout_width="wrap_content"
  15.             android:layout_height="wrap_content"
  16.             android:layout_alignParentStart="true"
  17.             android:layout_centerVertical="true"
  18.             android:layout_marginLeft="10dp"
  19.             android:drawableLeft="@mipmap/back"
  20.             android:drawablePadding="5dp"
  21.             android:onClick="@{toolbar.clickBack}"
  22.             android:padding="4dp"
  23.             android:text="@{toolbar.back}"
  24.             android:textColor="@color/white"
  25.             android:textSize="16sp"
  26.             app:layout_constraintBottom_toBottomOf="parent"
  27.             app:layout_constraintStart_toStartOf="parent"
  28.             app:layout_constraintTop_toTopOf="parent" />
  29.  
  30.         <TextView
  31.             android:id="@+id/tv_public_title"
  32.             android:layout_width="wrap_content"
  33.             android:layout_height="wrap_content"
  34.             android:layout_centerInParent="true"
  35.             android:layout_centerHorizontal="true"
  36.             android:layout_centerVertical="true"
  37.             android:onClick="@{toolbar.clickTitle}"
  38.             android:text="@{toolbar.tvTitle}"
  39.             android:textColor="@color/white"
  40.             android:textSize="18sp"
  41.             app:layout_constraintBottom_toBottomOf="parent"
  42.             app:layout_constraintEnd_toEndOf="parent"
  43.             app:layout_constraintStart_toStartOf="parent"
  44.             app:layout_constraintTop_toTopOf="parent" />
  45.  
  46.         <TextView
  47.             android:id="@+id/tv_public_right"
  48.             android:layout_width="wrap_content"
  49.             android:layout_height="wrap_content"
  50.             android:layout_alignParentEnd="true"
  51.             android:layout_centerVertical="true"
  52.             android:layout_marginRight="10dp"
  53.             android:onClick="@{toolbar.clickRight}"
  54.             android:text="@{toolbar.tvRight}"
  55.             android:textColor="@color/white"
  56.             app:layout_constraintBottom_toBottomOf="parent"
  57.             app:layout_constraintEnd_toEndOf="parent"
  58.             app:layout_constraintTop_toTopOf="parent" />
  59.  
  60.  
  61.     </android.support.constraint.ConstraintLayout>
  62.  
  63.     <data>
  64.  
  65.         <variable
  66.             name="toolbar"
  67.             type="com.example.module_common.common.toolbar.TitleBuilder" />
  68.  
  69.     </data>
  70. </layout>

3.标题栏的封装类TitleBuilder

  1. public class TitleBuilder {
  2.     private String back;
  3.     private String tvTitle;
  4.     private String tvRight;
  5.     //三个接口是为了重写点击事件
  6.     private BackClickListener backClickListener;
  7.     private TitleClickListener titleClickListener;
  8.     private RightClickListener rightClickListener;
  9.  
  10.     public static TitleBuilder getActivityToolBar(Activity activity) {
  11.         String back = activity.getString(R.string.public_back);//返回
  12.         TitleBuilder bar = new TitleBuilder();
  13.         bar.backClickListener = new BackClickListener() {
  14.             @Override
  15.             public void clickBack(View view) {
  16.                 ActivityMgr.getInstance().finishActivity(activity);//关闭当前activity，使用activity管理类
  17.             }
  18.         };
  19.  
  20.         bar.titleClickListener = new TitleClickListener() {
  21.             @Override
  22.             public void clickTitle(View view) {
  23.  
  24.             }
  25.         };
  26.  
  27.         bar.rightClickListener = new RightClickListener() {
  28.             @Override
  29.             public void clickRight(View view) {
  30.  
  31.             }
  32.         };
  33.         bar.setBack(back);
  34.         return bar;
  35.     }
  36.  
  37.     public void clickBack(View view) {
  38.         if (null != this.backClickListener) {
  39.             this.backClickListener.clickBack(view);
  40.         }
  41.     }
  42.  
  43.     public void clickTitle(View view) {
  44.         if (null != this.titleClickListener) {
  45.             this.titleClickListener.clickTitle(view);
  46.         }
  47.     }
  48.  
  49.     public void clickRight(View view) {
  50.         if (null != this.rightClickListener) {
  51.             this.rightClickListener.clickRight(view);
  52.         }
  53.  
  54.     }
  55.  
  56.  
  57.     public interface BackClickListener {
  58.         void clickBack(View view);
  59.     }
  60.  
  61.     public interface TitleClickListener {
  62.         void clickTitle(View view);
  63.     }
  64.  
  65.     public interface RightClickListener {
  66.         void clickRight(View view);
  67.     }
  68.  
  69.     public String getBack() {
  70.         return back;
  71.     }
  72.  
  73.     public void setBack(String back) {
  74.         this.back = back;
  75.     }
  76.  
  77.     public String getTvTitle() {
  78.         return tvTitle;
  79.     }
  80.  
  81.     public void setTvTitle(String tvTitle) {
  82.         this.tvTitle = tvTitle;
  83.     }
  84.  
  85.     public String getTvRight() {
  86.         return tvRight;
  87.     }
  88.  
  89.     public void setTvRight(String tvRight) {
  90.         this.tvRight = tvRight;
  91.     }
  92.  
  93.     public BackClickListener getBackClickListener() {
  94.         return backClickListener;
  95.     }
  96.  
  97.     public void setBackClickListener(BackClickListener backClickListener) {
  98.         this.backClickListener = backClickListener;
  99.     }
  100.  
  101.     public TitleClickListener getTitleClickListener() {
  102.         return titleClickListener;
  103.     }
  104.  
  105.     public void setTitleClickListener(TitleClickListener titleClickListener) {
  106.         this.titleClickListener = titleClickListener;
  107.     }
  108.  
  109.     public RightClickListener getRightClickListener() {
  110.         return rightClickListener;
  111.     }
  112.  
  113.     public void setRightClickListener(RightClickListener rightClickListener) {
  114.         this.rightClickListener = rightClickListener;
  115.     }
  116. }

4.BaseActivity

  1. public class BaseActivity extends AppCompatActivity {
  2.     private TitleBuilder toolbar;
  3.  
  4.     @Override
  5.     protected void onCreate(@Nullable Bundle savedInstanceState) {
  6.         super.onCreate(savedInstanceState);
  7.         ActivityMgr.getInstance().addActivity(this);//加入到堆栈，activity管理类
  8.  
  9.         toolbar = TitleBuilder.getActivityToolBar(this);
  10.     }
  11.  
  12.   @Override
  13.     public boolean onKeyDown(int keyCode, KeyEvent event) {//重写返回（只对物理返回键）
  14.         if (keyCode == KEYCODE_BACK) {
  15.             ActivityMgr.getInstance().finishActivity(this);//关闭当前activity，activity管理类
  16.         }
  17.         return super.onKeyDown(keyCode, event);
  18.     }
  19.  
  20.     public TitleBuilder getToolbar() {
  21.         return toolbar;
  22.     }
  23.  
  24.     public void setToolbar(TitleBuilder toolbar) {
  25.         this.toolbar = toolbar;
  26.     }
  27. }

5.activity_show_tool_bar布局：

注（担心有些朋友没有注意看布局中的<!--***-->提示，这里单独拿出来提示一下）：  

<include
            android:id="@+id/bar"
            layout="@layout/public_title"
            app:toolbar="@{bar}" />

toolbar是标题栏布局public_title里的<variable  name="toolbar" type="**"/>这里要对应上，

bar就是这个页面定义的<variable  name="bar" type="**"/>，可以随意改，但是要对应上

  1. <?xml version="1.0" encoding="utf-8"?>
  2.  
  3. <layout xmlns:android="http://schemas.android.com/apk/res/android"
  4.     xmlns:app="http://schemas.android.com/apk/res-auto"
  5.     xmlns:tools="http://schemas.android.com/tools">
  6.  
  7.     <android.support.constraint.ConstraintLayout
  8.         android:layout_width="match_parent"
  9.         android:layout_height="match_parent"
  10.         tools:context=".ui.activity.ShowToolBarActivity">
  11.  
  12.         <TextView
  13.             android:id="@+id/textView2"
  14.             android:layout_width="wrap_content"
  15.             android:layout_height="wrap_content"
  16.             android:text="展示公共标题栏ToolBar"
  17.             app:layout_constraintBottom_toBottomOf="parent"
  18.             app:layout_constraintEnd_toEndOf="parent"
  19.             app:layout_constraintStart_toStartOf="parent"
  20.             app:layout_constraintTop_toBottomOf="@+id/bar" />
  21.  
  22.         <include
  23.             android:id="@+id/bar"
  24.             layout="@layout/public_title"
  25.             app:toolbar="@{bar}" />
  26.         <!--toolbar是标题栏布局public_title里的<variable  name="toolbar" type="**"/>这里要对应上，bar就是这个页面定义的<variable  name="bar" type="**"/>，可以随意改，但是要对应上-->
  27.  
  28.     </android.support.constraint.ConstraintLayout>
  29.  
  30.     <data>
  31.  
  32.         <variable
  33.             name="bar"
  34.             type="com.example.module_common.common.toolbar.TitleBuilder" />
  35.  
  36.     </data>
  37. </layout>

6.ShowToolBarActivity必须继承BaseActivity

  1. public class ShowToolBarActivity extends BaseActivity {
  2.     private ActivityShowToolBarBinding mBinding;
  3.  
  4.     @Override
  5.     protected void onCreate(Bundle savedInstanceState) {
  6.         super.onCreate(savedInstanceState);
  7.         mBinding = DataBindingUtil.setContentView(this, R.layout.activity_show_tool_bar);
  8.         mBinding.setBar(getToolbar());
  9.  
  10.         initViwe();
  11.     }
  12.  
  13.     private void initViwe() {
  14.         getToolbar().setBack("不叫返回叫週莫");
  15.         getToolbar().setTvTitle("週莫标题");
  16.         getToolbar().setTvRight("週莫右边");
  17.  
  18.         //重写三个事件
  19.         getToolbar().setBackClickListener(new TitleBuilder.BackClickListener() {
  20.             @Override
  21.             public void clickBack(View view) {
  22.                 Toast.makeText(ShowToolBarActivity.this, "我不想关闭，我想留着", Toast.LENGTH_SHORT).show();
  23.             }
  24.         });
  25.  
  26.         getToolbar().setTitleClickListener(new TitleBuilder.TitleClickListener() {
  27.             @Override
  28.             public void clickTitle(View view) {
  29.                 Toast.makeText(ShowToolBarActivity.this, "你点击了週莫标题", Toast.LENGTH_SHORT).show();
  30.             }
  31.         });
  32.  
  33.         getToolbar().setRightClickListener(new TitleBuilder.RightClickListener() {
  34.             @Override
  35.             public void clickRight(View view) {
  36.                 Toast.makeText(ShowToolBarActivity.this, "你点击了週莫右边", Toast.LENGTH_SHORT).show();
  37.             }
  38.         });
  39.     }
  40. }

7.一气呵成，收工。有不足之处，请评论区指出，谢谢！

效果图如下：

 

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