前言
ToolBar是Android 5.0推出的一个新的导航控件用于取代之前的ActionBar,由于其高度的可定制性、灵活性、具有Material Design风格等优点,越来越多的App也用上了ToolBar。
沉浸式状态栏是从android Kitkat(Android 4.4)开始出现的,它可以被设置成与APP顶部相同的颜色,这就使得切换APP时,整个界面就好似切换到了与APP相同的风格样式一样。
依赖包:
  Toolbar, implementation 'androidx.appcompat:appcompat:1.1.0'
沉浸式, implementation 'com.gyf.immersionbar:immersionbar:3.0.0'
1、自定义Toolbar步骤:
1)、定义 /values/styles.xml
<?xml version="1.0" encoding="utf-8"?> <resources> <style name="TextAppearance_TitleBar_Title" parent="TextAppearance.AppCompat.Toolbar.Title"> ... </style> <style name="TextAppearance_TitleBar_subTitle" parent="TextAppearance.AppCompat.Toolbar.Subtitle"> .... </style> </resources>
2)、自定义toolbar 继承 androidx.appcompat.widget.Toolbar
public class CustomToolBar extends Toolbar {
 private TextView mCenterTitle;
 private ImageView mCenterIcon; //中心icon
 private TextView mLeftText;
 private ImageButton mLeftIcon; 
 private TextView mSettingText;
 private ImageButton mSettingIcon;
 public CustomToolBar(Context context) {
  super(context);
 }
 public CustomToolBar(Context context, AttributeSet attrs) {
  super(context, attrs);
 }
 public CustomToolBar(Context context, AttributeSet attrs, int defStyleAttr) {
  super(context, attrs, defStyleAttr);
 }
 
 public void setLeftText(@StringRes int id) {
  setLeftText(this.getContext().getText(id));
 }
 
 public CustomToolBar setLeftText(CharSequence text) {
  Context context = this.getContext();
  if (this.mLeftText == null) {
   this.mLeftText = new TextView(context);
   this.mLeftText.setGravity(Gravity.CENTER_VERTICAL);
   this.mLeftText.setSingleLine();
//   this.mLeftText.setEllipsize(TextUtils.TruncateAt.END);
   setLeftTextAppearance(getContext(), R.style.TextAppearance_TitleBar_subTitle);
   //textView in left
//   this.addMyView(this.mLeftText, Gravity.START);
   int i = dp2px(this, 16);
   this.addMyView(this.mLeftText, Gravity.START, 0, 0, i, 0, 48);
  }
  mLeftText.setText(text);
  return this;
 }
 public void setLeftTextAppearance(Context context, @StyleRes int resId) {
  if (this.mLeftText != null) {
   this.mLeftText.setTextAppearance(context, resId);
  }
 }
 public void setLeftTextColor(@ColorInt int color) {
  if (this.mLeftText != null) {
   this.mLeftText.setTextColor(color);
  }
 }
 public void setLeftTextOnClickListener(OnClickListener listener) {
  if (mLeftText != null) {
   mLeftText.setOnClickListener(listener);
  }
 }
 public CustomToolBar setLeftIcon(@DrawableRes int resId) {
  return setLeftIcon(ContextCompat.getDrawable(this.getContext(), resId));
 }
 @TargetApi(Build.VERSION_CODES.JELLY_BEAN)
 public CustomToolBar setLeftIcon(Drawable drawable) {
  Context context = this.getContext();
  if (this.mLeftIcon == null) {
   this.mLeftIcon = new ImageButton(context);
    ...
   this.addMyView(this.mLeftIcon, Gravity.START);
  } else {
   if (mLeftIcon.getVisibility() != VISIBLE) {
    mLeftIcon.setVisibility(VISIBLE);
   }
  }
  if (mLeftText != null && mLeftText.getVisibility() != GONE) {
   mLeftText.setVisibility(GONE);
  }
  mLeftIcon.setImageDrawable(drawable);
  return this;
 }
 public void setLeftIconOnClickListener(OnClickListener listener) {
  if (mLeftIcon != null) {
   mLeftIcon.setOnClickListener(listener);
  }
 }
 public void setLeftIconVisibility(int visibility) {
  if (mLeftIcon != null) {
   mLeftIcon.setVisibility(visibility);
  }
 }
 
 public CustomToolBar setMyCenterTitle(@StringRes int id, boolean center) {
  return setMyCenterTitle(this.getContext().getText(id), center);
 }
 
 public void setMyCenterTitle(@StringRes int Rid) {
  setMyCenterTitle(this.getContext().getText(Rid));
 }
 public void setMyCenterTitle(CharSequence text) {
  Context context = this.getContext();
  if (this.mCenterTitle == null) {
   this.mCenterTitle = new TextView(context);
   ...
  } else {
   if (this.mCenterTitle.getVisibility() != VISIBLE) {
    mCenterTitle.setVisibility(VISIBLE);
   }
  }
  if (mCenterIcon != null && mCenterIcon.getVisibility() != GONE) {
   mCenterIcon.setVisibility(GONE);
  }
 
  ...
 }
 public CustomToolBar setMyCenterTitle(CharSequence text, boolean center) {
  Context context = this.getContext();
  if (this.mCenterTitle == null) {
   this.mCenterTitle = new TextView(context);
   ...
  } else {
   if (this.mCenterTitle.getVisibility() != VISIBLE) {
    mCenterTitle.setVisibility(VISIBLE);
   }
  }
  if (mCenterIcon != null && mCenterIcon.getVisibility() != GONE) {
   mCenterIcon.setVisibility(GONE);
  }
 
  if (!center) {
   setTitle(text);
   setTitleTextColor(getResources().getColor(R.color.black));
  } else {
   mCenterTitle.setText(text);
   mCenterTitle.setTextColor(getResources().getColor(R.color.black));
   mCenterTitle.setTextSize(16);
  }
  return this;
 }
 public void setMyCenterTextAppearance(Context context, @StyleRes int resId) {
  if (this.mCenterTitle != null) {
   this.mCenterTitle.setTextAppearance(context, resId);
  }
 }
 public void setMyCenterTextColor(@ColorInt int color) {
  if (this.mCenterTitle != null) {
   this.mCenterTitle.setTextColor(color);
  }
 }
 public void setMyCenterTextOnClickListener(OnClickListener listener) {
  if (mCenterTitle != null) {
   mCenterTitle.setOnClickListener(listener);
  }
 }
 
 public void setMyCenterIcon(@DrawableRes int resId) {
  setMyCenterIcon(ContextCompat.getDrawable(this.getContext(), resId));
 }
 public void setMyCenterIcon(Drawable drawable) {
  Context context = this.getContext();
  if (this.mCenterIcon == null) {
   ...
  } else {
   if (mCenterIcon.getVisibility() != VISIBLE) {
    mCenterIcon.setVisibility(VISIBLE);
   }
  }
  if (mCenterTitle != null && mCenterTitle.getVisibility() != GONE) {
   mCenterTitle.setVisibility(GONE);
  }
  
  setTitle("");
  mCenterIcon.setImageDrawable(drawable);
 }
 
 public void setMySettingText(@StringRes int Rid) {
  setMySettingText(this.getContext().getText(Rid));
 }
 public void setMySettingText(CharSequence text) {
  Context context = this.getContext();
  if (this.mSettingText == null) {
   ...
  } else {
   if (mSettingText.getVisibility() != VISIBLE) {
    mSettingText.setVisibility(VISIBLE);
   }
  }
  if (mSettingIcon != null && mSettingIcon.getVisibility() != GONE) {
   mSettingIcon.setVisibility(GONE);
  }
  mSettingText.setText(text);
  mSettingText.setTextSize(14);
  mSettingText.setTextColor(getResources().getColor(R.color.toolbar_title));
 }
 public void setMySettingTextAppearance(Context context, @StyleRes int resId) {
  if (mSettingText != null) {
   mSettingText.setTextAppearance(context, resId);
  }
 }
 public void setMySettingTextColor(@ColorInt int color) {
  if (mSettingText != null) {
   mSettingText.setTextColor(color);
  }
 }
 public void setSettingTextOnClickListener(OnClickListener listener) {
  if (mSettingText != null) {
   mSettingText.setOnClickListener(listener);
  }
 }
 public CustomToolBar setMySettingIcon(@DrawableRes int resId) {
  return setMySettingIcon(ContextCompat.getDrawable(this.getContext(), resId));
//  ViewConfiguration.get(this.getContext()).getScaledTouchSlop();
 }
 @TargetApi(Build.VERSION_CODES.JELLY_BEAN)
 public CustomToolBar setMySettingIcon(Drawable drawable) {
  Context context = this.getContext();
  if (this.mSettingIcon == null) {
   ...
  } else {
   if (mSettingIcon.getVisibility() != VISIBLE) {
    mSettingIcon.setVisibility(VISIBLE);
   }
  }
  if (mSettingText != null && mSettingText.getVisibility() != GONE) {
   mSettingText.setVisibility(GONE);
  }
  mSettingIcon.setImageDrawable(drawable);
  return this;
 }
 public void setSettingIconOnClickListener(OnClickListener listener) {
  if (mSettingIcon != null) {
   mSettingIcon.setOnClickListener(listener);
  }
 }
 private void addSimpleView(View v, int gravity) {
  addSimpleView(v, gravity, 0, 0, 0, 0);
 }
 private void addSimpleView(View v, int gravity, int left, int top, int right, int bottom) {
  LayoutParams lp = new LayoutParams(LayoutParams.WRAP_CONTENT,
    LayoutParams.WRAP_CONTENT, gravity);
  lp.setMargins(left, top, right, bottom);
  this.addView(v, lp);
 }
 
 private void addMyView(View v, int gravity) {
  addMyView(v, gravity, 0, 0, dp2px(this, 16), 0);
 }
 private void addMyView(View v, int gravity, int left, int top, int right, int bottom) {
  LayoutParams lp = new LayoutParams(dp2px(this, 20),
    dp2px(this, 20), gravity);
  lp.setMargins(left, top, right, bottom);
  this.addView(v, lp);
 }
 private void addMyView(View v, int gravity, int left, int top, int right, int bottom, int width) {
  LayoutParams lp = new LayoutParams(dp2px(this, width),
    20, gravity);
  lp.setMargins(left, top, right, bottom);
  this.addView(v, lp);
 }
 public CustomToolBar setCenterTitleWithImg(CharSequence text, Drawable drawable, boolean center) {
  Context context = this.getContext();
  if (this.mCenterTitle == null) {
   this.mCenterTitle = new TextView(context);
   ...
   if (this.mCenterTitle.getVisibility() != VISIBLE) {
    mCenterTitle.setVisibility(VISIBLE);
   }
  }
  if (this.mCenterIcon == null) {
   this.mCenterIcon = new ImageView(context);
   ...
  } else {
   if (mCenterIcon.getVisibility() != VISIBLE) {
    mCenterIcon.setVisibility(VISIBLE);
   }
  }
  mCenterTitle.setTextSize(18);
  mCenterTitle.setTextColor(getResources().getColor(R.color.black));
  mCenterTitle.setText(text);
  mCenterIcon.setImageDrawable(drawable);
  return this;
 }
 public void setCenterTitleWithImgOnClickListener(OnClickListener listener) {
  if (mCenterTitle != null) {
   ((View) mCenterTitle.getParent()).setOnClickListener(listener);
  }
 }
}
2、自定义Toolbar使用
1)、res/layout创建布局文件
   <?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
  xmlns:app="http://schemas.android.com/apk/res-auto"
  android:layout_width="match_parent"
  android:layout_height="wrap_content">
  <com.ktx.view.CustomToolBar
    android:id="@+id/toolbar"
    android:layout_width="match_parent"
    android:layout_height="?actionBarSize"
    android:background="@android:color/white"  
    app:popupTheme="@style/ThemeOverlay.AppCompat.Light"
    app:titleTextColor="@android:color/black" />
</FrameLayout>
2)、在布局中使用
<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android"
  xmlns:app="http://schemas.android.com/apk/res-auto"
  xmlns:binding="http://schemas.android.com/tools">
  <data>
    <variable
      name="viewModel"
      type="com.android.playandroid.viewmodel.LoginViewModel" />
  </data>
  <androidx.constraintlayout.widget.ConstraintLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/bkg"
    android:orientation="vertical">
    <include
      layout="@layout/title_layout"
      app:layout_constraintLeft_toLeftOf="parent"
      app:layout_constraintTop_toTopOf="parent" />
     ...
  </androidx.constraintlayout.widget.ConstraintLayout>
</layout>
3)、代码中使用
a、初始化:
mBinding.root.toolbar.setNavigationIcon(R.mipmap.register_close) mBinding.root.toolbar.setMyCenterTitle(getString(R.string.register), true) mBinding.root.toolbar.setMySettingText(getString(R.string.login))
b、点击事件:
  mBinding.root.toolbar.setNavigationOnClickListener {
    ....
  }
  mBinding.root.toolbar.setSettingTextOnClickListener {
    ...
}
4)、沉浸式,设置toolbar背景颜色、文字颜色,一般写在基类
 protected open fun initImmersionBar() {
    //在BaseActivity里初始化
    mImmersionBar = ImmersionBar.with(this)
    if (toolbar != null) {
      mImmersionBar.titleBar(toolbar)
    }
    mImmersionBar.statusBarDarkFont(true)
  //  mImmersionBar.keyboardEnable(true).navigationBarWithKitkatEnable(false).init()
   // mImmersionBar.init()
    
    ImmersionBar.with(this).init()
  }
Google原生的效果,不必多说,可以实现类似这样的效果

注意:
1、配置整个app的toolbar风格,在/value/styles.xml文件修改代码
 <style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
  
    <item name="colorPrimary">@android:color/white</item>
    <item name="colorPrimaryDark">@android:color/white</item>
    <item name="colorAccent">@android:color/white</item>
   ...
 
  </style>
2、修改了 toolbar的高度 ,怎么让navigationIcon显示在toolbar中心?
只要设置如下,即可:android:minHeight="@dimen/toolbar_height"
3、toolbar布局文件位置
如果在commonlibrary目录创建该文件,在app 下还需要复制一份,因为在app 使用toolbar,kotlin-android-extensions引用不到commonlibrary目录下的布局文件。
代码Github:https://github.com/AlbertShen0211/PlayAndroid
总结
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