这篇文章给大家介绍Android中怎么通过自定义view实现TopBar效果，内容非常详细，感兴趣的小伙伴们可以参考借鉴，希望对大家能有所帮助。
布局文件
<?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="" 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>自定义属性attrs.xml文件
<?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>自定义View的Class类
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 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); } 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 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); } } public interface OnButtonClickListener{ void onLeftClick(); void onRightClick(); } public void setOnButtonClickListener(final OnButtonClickListener onButtonClickListener) { if(onButtonClickListener !=null){ if(mLeftTextView != null){ mLeftTextView.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { onButtonClickListener.onLeftClick(); } }); } 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(); } }); } if(mRightButton != null){ mRightButton.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { onButtonClickListener.onRightClick(); } }); } } }Main方法的代码调用自定义的类和点击事件
public class MainActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); MyView Myview = (MyView) findViewById(R.id.titlebar); 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(); } }); } }关于Android中怎么通过自定义view实现TopBar效果就分享到这里了，希望以上内容可以对大家有一定的帮助，可以学到更多知识。如果觉得文章不错，可以把它分享出去让更多的人看到。
