自定義頂部TitleBar控件

其實這個控件還是相對簡單的，隻需要自定義一些屬性，然後繼承RelativeLayout根據應用的需求對左中右的空間進行添加控件和監聽事件的添加即可，多的不說，先上代碼

<!--自定義标題欄-->
<declare-styleable name="Title_bar">
    <attr name="titleText" format="string|reference"/>
    <attr name="titleTextSize" format="dimension|reference"/>
    <attr name="titleColor" format="color|reference"/>

    <attr name="leftBtnText" format="string|reference"/>
    <attr name="leftBtnTextSize" format="dimension|reference"/>
    <attr name="leftBtnImage" format="reference"/>
    <attr name="leftTextColor" format="color|reference"/>
    <attr name="left_padding_left" format="dimension|reference"/>
    <attr name="left_padding_right" format="dimension|reference"/>
    <attr name="left_drawable_padding" format="dimension|reference"/>

    <attr name="rightBtnText" format="string|reference"/>
    <attr name="rightBtnTextSize" format="dimension|reference"/>
    <attr name="rightTExtColor" format="color|reference"/>
    <attr name="rightBtnImage" format="reference"/>
    <attr name="right_padding_left" format="dimension|reference"/>
    <attr name="right_padding_right" format="dimension|reference"/>
</declare-styleable>

可以很明顯得看出各自所定義的屬性，應為中間的位置一般是不需要添加圖檔的，是以隻有文字的屬性，而左右位置有可能是文字和圖檔都存在的形式展示，是以需要多一些屬性來定義左右位置的空間的展示。接下來是自定義的RelativeLayout的Java檔案，也比較簡單，無非就是對位置與間距、字号的定義。

package tv.buka.view;

import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.util.TypedValue;
import android.view.Gravity;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.RelativeLayout;
import android.widget.TextView;

import tv.buka.R;

/**
 * Created by zhangjutao on 16/9/18.
 */
public class TitleBarView extends RelativeLayout {

    /**
     * 中間标題
     */
    private String title;
    /**
     * 左邊文字标題
     */
    private String leftTitle;
    /**
     * 右邊标題文字
     */
    private String rightTitle;
    /**
     * 标題文字尺寸
     */
    private float titleTextSize;
    /**
     * 左邊文字尺寸
     */
    private float leftTextSize;
    /**
     * 右邊文字尺寸
     */
    private float rightTextSize;
    /**
     * 标題文字顔色
     */
    private int titleTextColor;
    /**
     * 左邊标題文字顔色
     */
    private int leftTextColor;
    /**
     * 右邊标題文字顔色
     */
    private int rightTextColor;
    /**
     * 左邊按鈕圖檔
     */
    private Drawable leftBtnImg;
    /**
     * 右邊按鈕圖檔
     */
    private Drawable rightBtnImage;
    private int leftPaddingLeft;
    private int leftPaddingRight;
    private int leftDrawablePadding;
    private int rightPaddingLeft;
    private int rightPaddingRight;


    private OnLeftClick onLeftClick;
    private OnRightClick onRightClick;
    private OnCenterClick onCenterClick;

    public TitleBarView(Context context) {
        super(context,null);
    }

    public TitleBarView(Context context, AttributeSet attrs) {
        super(context, attrs);
        init(context,attrs);
        initView(context);
    }



    private void init(Context context, AttributeSet attrs) {
        TypedArray typedArray = context.obtainStyledAttributes(attrs, R.styleable.Title_bar);
        title = typedArray.getString(R.styleable.Title_bar_titleText);
        leftTitle = typedArray.getString(R.styleable.Title_bar_leftBtnText);
        rightTitle = typedArray.getString(R.styleable.Title_bar_rightBtnText);
        titleTextSize = typedArray.getDimension(R.styleable.Title_bar_titleTextSize,TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_SP, 16, getResources().getDisplayMetrics()));
        leftTextSize = typedArray.getDimension(R.styleable.Title_bar_leftBtnTextSize,28f);
        rightTextSize = typedArray.getDimension(R.styleable.Title_bar_rightBtnTextSize,28f);
        titleTextColor = typedArray.getColor(R.styleable.Title_bar_titleColor,0);
        leftTextColor = typedArray.getColor(R.styleable.Title_bar_leftTextColor,0);
        rightTextColor = typedArray.getColor(R.styleable.Title_bar_rightTExtColor,0);
        leftBtnImg = typedArray.getDrawable(R.styleable.Title_bar_leftBtnImage);
        rightBtnImage = typedArray.getDrawable(R.styleable.Title_bar_rightBtnImage);
        leftPaddingLeft = typedArray.getDimensionPixelOffset(R.styleable.Title_bar_left_padding_left,0);
        leftPaddingRight = typedArray.getDimensionPixelOffset(R.styleable.Title_bar_left_padding_right,0);
        leftDrawablePadding = typedArray.getDimensionPixelOffset(R.styleable.Title_bar_left_drawable_padding,0);
        rightPaddingLeft = typedArray.getDimensionPixelOffset(R.styleable.Title_bar_right_padding_left,0);
        rightPaddingRight = typedArray.getDimensionPixelOffset(R.styleable.Title_bar_right_padding_right,0);
        typedArray.recycle();
    }


    private void initView(Context context){
        if (title!=null){
            final TextView titleTv = new TextView(context);
            LayoutParams titleParams = new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
            titleParams.addRule(RelativeLayout.CENTER_IN_PARENT);
            titleTv.setGravity(Gravity.CENTER);
            titleTv.setText(title);
            titleTv.setTextColor(titleTextColor);
            titleTv.setTextSize(TypedValue.COMPLEX_UNIT_PX,titleTextSize);
            titleTv.setLayoutParams(titleParams);
            addView(titleTv);
            titleTv.setClickable(true);
            titleTv.setOnClickListener(new OnClickListener() {
                @Override
                public void onClick(View view) {
                    if (onCenterClick!=null){
                        onCenterClick.onClick(titleTv);
                    }
                }
            });
        }

        if (leftTitle!=null&&leftBtnImg!=null){
            final TextView leftTv = new TextView(context);
            LayoutParams leftParams = new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.MATCH_PARENT);
            leftParams.addRule(RelativeLayout.ALIGN_PARENT_LEFT);
            leftTv.setText(leftTitle);
            leftTv.setTextSize(TypedValue.COMPLEX_UNIT_PX,leftTextSize);
            leftTv.setTextColor(leftTextColor);
            leftTv.setGravity(Gravity.CENTER);
            leftTv.setPadding(leftPaddingLeft,0,leftPaddingRight,0);
            leftBtnImg.setBounds(0,0,leftBtnImg.getMinimumWidth(),leftBtnImg.getMinimumHeight());
            leftTv.setCompoundDrawables(leftBtnImg,null,null,null);
            leftTv.setCompoundDrawablePadding(leftDrawablePadding);
            leftTv.setLayoutParams(leftParams);
            addView(leftTv);
            leftTv.setClickable(true);
            leftTv.setOnClickListener(new OnClickListener() {
                @Override
                public void onClick(View view) {
                    if (onLeftClick!=null){
                        onLeftClick.onClick(leftTv);
                    }
                }
            });

        }else if (leftTitle==null&&leftBtnImg!=null){
            final ImageView leftImg = new ImageView(context);
            LayoutParams leftParams = new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.MATCH_PARENT);
            leftParams.addRule(RelativeLayout.ALIGN_PARENT_LEFT);
            leftImg.setScaleType(ImageView.ScaleType.CENTER);
            leftImg.setPadding(leftPaddingLeft,0,leftPaddingRight,0);
            leftImg.setLayoutParams(leftParams);
            addView(leftImg);
            leftImg.setClickable(true);
            leftImg.setOnClickListener(new OnClickListener() {
                @Override
                public void onClick(View view) {
                    if (onLeftClick!=null){
                        onLeftClick.onClick(leftImg);
                    }
                }
            });
        }else if (leftTitle!=null&&leftBtnImg==null){
            final TextView leftTv = new TextView(context);
            LayoutParams leftParams = new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.MATCH_PARENT);
            leftParams.addRule(RelativeLayout.ALIGN_PARENT_LEFT);
            leftTv.setGravity(Gravity.CENTER);
            leftTv.setPadding(leftPaddingLeft,0,leftPaddingRight,0);
            leftTv.setText(leftTitle);
            leftTv.setTextSize(TypedValue.COMPLEX_UNIT_PX,leftTextSize);
            leftTv.setTextColor(leftTextColor);
            leftTv.setLayoutParams(leftParams);
            addView(leftTv);
            leftTv.setClickable(true);
            leftTv.setOnClickListener(new OnClickListener() {
                @Override
                public void onClick(View view) {
                    if (onLeftClick!=null){
                        onLeftClick.onClick(leftTv);
                    }
                }
            });
        }

        if (rightTitle!=null){
            final TextView rightTv = new TextView(context);
            LayoutParams rightParams = new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.MATCH_PARENT);
            rightParams.addRule(RelativeLayout.ALIGN_PARENT_RIGHT);
            rightTv.setText(rightTitle);
            rightTv.setTextSize(TypedValue.COMPLEX_UNIT_PX,rightTextSize);
            rightTv.setTextColor(rightTextColor);
            rightTv.setGravity(Gravity.CENTER);
            rightTv.setPadding(rightPaddingLeft,0,rightPaddingRight,0);
            rightTv.setLayoutParams(rightParams);
            addView(rightTv);
            rightTv.setClickable(true);
            rightTv.setOnClickListener(new OnClickListener() {
                @Override
                public void onClick(View view) {
                    if (onRightClick!=null){
                        onRightClick.onClick(rightTv);
                    }
                }
            });
        }else if (rightBtnImage!=null){
            final ImageView rightImg = new ImageView(context);
            LayoutParams rightParams = new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.MATCH_PARENT);
            rightParams.addRule(RelativeLayout.ALIGN_PARENT_RIGHT);
            rightImg.setImageDrawable(rightBtnImage);
            rightImg.setScaleType(ImageView.ScaleType.CENTER);
            rightImg.setPadding(rightPaddingLeft,0,rightPaddingRight,0);
            rightImg.setLayoutParams(rightParams);
            addView(rightImg);
            rightImg.setClickable(true);
            rightImg.setOnClickListener(new OnClickListener() {
                @Override
                public void onClick(View view) {
                    if (onRightClick!=null){
                        onRightClick.onClick(rightImg);
                    }
                }
            });
        }
    }


    public void setTitle(String title) {
        this.title = title;
    }

    public void setLeftTitle(String leftTitle) {
        this.leftTitle = leftTitle;
    }

    public void setRightTitle(String rightTitle) {
        this.rightTitle = rightTitle;
    }

    public void setTitleTextSize(float titleTextSize) {
        this.titleTextSize = titleTextSize;
    }

    public void setLeftTextSize(float leftTextSize) {
        this.leftTextSize = leftTextSize;
    }

    public void setRightTextSize(float rightTextSize) {
        this.rightTextSize = rightTextSize;
    }

    public void setTitleTextColor(int titleTextColor) {
        this.titleTextColor = titleTextColor;
    }

    public void setLeftTextColor(int leftTextColor) {
        this.leftTextColor = leftTextColor;
    }

    public void setRightTextColor(int rightTextColor) {
        this.rightTextColor = rightTextColor;
    }

    public void setLeftBtnImg(Drawable leftBtnImg) {
        this.leftBtnImg = leftBtnImg;
    }

    public void setRightBtnImage(Drawable rightBtnImage) {
        this.rightBtnImage = rightBtnImage;
    }

    public void setLeftPaddingLeft(int leftPaddingLeft) {
        this.leftPaddingLeft = leftPaddingLeft;
    }

    public void setLeftPaddingRight(int leftPaddingRight) {
        this.leftPaddingRight = leftPaddingRight;
    }

    public void setLeftDrawablePadding(int leftDrawablePadding) {
        this.leftDrawablePadding = leftDrawablePadding;
    }

    public void setRightPaddingLeft(int rightPaddingLeft) {
        this.rightPaddingLeft = rightPaddingLeft;
    }

    public void setRightPaddingRight(int rightPaddingRight) {
        this.rightPaddingRight = rightPaddingRight;
    }

    public void setOnLeftClick(OnLeftClick onLeftClick) {
        this.onLeftClick = onLeftClick;
    }

    public void setOnRightClick(OnRightClick onRightClick) {
        this.onRightClick = onRightClick;
    }

    public void setOnCenterClick(OnCenterClick onCenterClick) {
        this.onCenterClick = onCenterClick;
    }

    /**
     * 左邊控件的監聽
     */
    public interface OnLeftClick{
        void onClick(View view);
    }

    /**
     * 右邊控件的監聽
     */
    public interface OnRightClick{
        void onClick(View view);
    }

    /**
     * 中間控件的監聽
     */
    public interface OnCenterClick{
        void onClick(View view);
    }



}

特别要注意的是字号的設定，也就是TextView.setTextSize的設定，直接設定你在xml檔案中定義的字号的話是偏大的，為什麼呢，不管你在xml檔案中定義的是什麼機關，px或者是sp，當傳回到Java檔案中時getDmesion都是傳回的px，如果你設定的是sp值，方法會自動給你乘以你手機對應的分辨率比例，而setTextSize自動設定的是sp指，也就是說還會給你再乘一遍，這樣造成的後果就是你設定的文字字号都整體偏大，是以這裡，你需要在設定setSize的時候給他規定一下機關

TextView.setTextSize(TypedValue.COMPLEX_UNIT_PX,rightTextSize);這樣你設定的字号就正确了，然後ok你的空間就可以用了

<TitleBarView
    android:id="@+id/select_top_layout"
    android:layout_width="match_parent"
    android:layout_height="44dp"
    android:background="@color/main_color"
    android:visibility="gone"
    app:titleText = "@string/all_selected"
    app:titleTextSize="18sp"
    app:titleColor="@color/white"
    app:leftBtnText="@string/cancel"
    app:leftBtnTextSize="18sp"
    app:leftTextColor="@color/white"
    app:left_padding_left="15dp"
    app:rightBtnImage="@mipmap/icon_delete"
    app:right_padding_right="15dp"/>

自定義頂部TitleBar控件

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