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今天给大家带来一个很简单但是很常用的控件ButtonExtendM,在开发中我们经常会用到图片加文字的组合控件,像这样:


以上图片都是从微信上截取的。(暂时没有找到icon在下,文字在上的例子)
下面我们通过一个控件来实现上下左右全部的样式,只需改动一个属性值即可改变icon的位置,是不是很方便,先看下demo效果图:


没错上图的三种不同的样式都是通过同一个控件实现的,下面我们看下代码
第一步 自定义属性 

在res/values/目录下新建attrs.xml文件,
添加如下属性

<attr name="backColor" format="color" /> <attr name="backColorPress" format="color" /> <attr name="textColor" format="color" /> <attr name="textColorPress" format="color" /> <declare-styleable name="ButtonExtendM"><attr name="backColor"/><attr name="backColorPress"/><attr name="textColor"/><attr name="textColorPress"/><attr name="iconDrawable" format="reference" /><attr name="iconDrawablePress" format="reference" /><attr name="text" format="string" /><attr name="textSize" format="float" /><attr name="spacing" format="dimension" /><attr name="style"> <enum name="iconLeft" value="0" /> <enum name="iconRight" value="1" /> <enum name="iconUp" value="2" /> <enum name="iconBottom" value="3" /></attr> </declare-styleable>
第二步 新建布局文件view_button_extend_m.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="wrap_content" android:layout_height="wrap_content"> <ImageViewandroid:id="@+id/iv_icon"android:layout_width="wrap_content"android:layout_height="wrap_content"/> <TextViewandroid:id="@+id/tv_content"android:layout_width="wrap_content"android:layout_height="wrap_content"android:visibility="gone"android:text="@string/button_extend_m_default_text"/></RelativeLayout>
第三步 新建ButtonExtendM.java继承RelativeLayout

package com.landptf.view;import android.content.Context;import android.content.res.ColorStateList;import android.content.res.TypedArray;import android.graphics.drawable.Drawable;import android.util.AttributeSet;import android.view.Gravity;import android.view.LayoutInflater;import android.view.MotionEvent;import android.view.View;import android.widget.ImageView;import android.widget.RelativeLayout;import android.widget.TextView;import com.landptf.R;import com.landptf.util.ConvertM;/** * Created by landptf on 2016/10/31. * 扩展Button,支持文字和icon分上下左右四种方式显示 * 默认为左右结构,图片在左,文字在右 */public class ButtonExtendM extends RelativeLayout { /*** 左右结构,图片在左,文字在右*/ public static final int STYLE_ICON_LEFT = 0; /*** 左右结构,图片在右,文字在左*/ public static final int STYLE_ICON_RIGHT = 1; /*** 上下结构,图片在上,文字在下*/ public static final int STYLE_ICON_UP = 2; /*** 上下结构,图片在下,文字在上*/ public static final int STYLE_ICON_DOWN = 3; /*** 定义控件*/ private ImageView ivIcon; private TextView tvContent; /*** 上下文*/ private Context mContext; /*** View的背景色*/ private int backColor = 0; /*** View被按下时的背景色*/ private int backColorPress = 0; /*** icon的背景图片*/ private Drawable iconDrawable = null; /*** icon被按下时显示的背景图片*/ private Drawable iconDrawablePress = null; /*** View文字的颜色*/ private ColorStateList textColor = null; /*** View被按下时文字的颜色*/ private ColorStateList textColorPress = null; /*** 两个控件之间的间距,默认为8dp*/ private int spacing = 8; /*** 两个控件的位置结构*/ private int mStyle = STYLE_ICON_LEFT; /*** 标示onTouch方法的返回值,用来解决onClick和onTouch冲突问题*/ private boolean isCost = true; private OnClickListener onClickListener = null; public interface OnClickListener {void onClick(View v); } /*** 设置View的Click事件** @param l*/ public void setOnClickListener(OnClickListener l) {this.onClickListener = l;isCost = false; } public ButtonExtendM(Context context) {super(context);mContext = context; } public ButtonExtendM(Context context, AttributeSet attrs) {this(context, attrs, 0); } public ButtonExtendM(Context context, AttributeSet attrs, int defStyle) {super(context, attrs, defStyle);mContext = context;init(context, attrs, defStyle); } private void init(Context context, AttributeSet attrs, int defStyle) {//加载布局LayoutInflater.from(context).inflate(R.layout.view_button_extend_m, this, true);//初始化控件ivIcon = (ImageView) findViewById(R.id.iv_icon);tvContent = (TextView) findViewById(R.id.tv_content);setGravity(Gravity.CENTER);TypedArray a = getContext().obtainStyledAttributes(attrs, R.styleable.ButtonExtendM, defStyle, 0);if (a != null) { //设置背景色 ColorStateList colorList = a.getColorStateList(R.styleable.ButtonExtendM_backColor); if (colorList != null) {backColor = colorList.getColorForState(getDrawableState(), 0);if (backColor != 0) { setBackgroundColor(backColor);} } //记录View被按下时的背景色 ColorStateList colorListPress = a.getColorStateList(R.styleable.ButtonExtendM_backColorPress); if (colorListPress != null) {backColorPress = colorListPress.getColorForState(getDrawableState(), 0); } //设置icon iconDrawable = a.getDrawable(R.styleable.ButtonExtendM_iconDrawable); if (iconDrawable != null) {ivIcon.setImageDrawable(iconDrawable); } //记录View被按下时的icon的图片 iconDrawablePress = a.getDrawable(R.styleable.ButtonExtendM_iconDrawablePress); //设置文字的颜色 textColor = a.getColorStateList(R.styleable.ButtonExtendM_textColor); if (textColor != null) {tvContent.setTextColor(textColor); } //记录View被按下时文字的颜色 textColorPress = a.getColorStateList(R.styleable.ButtonExtendM_textColorPress); //设置显示的文本内容 String text = a.getString(R.styleable.ButtonExtendM_text); if (text != null) {//默认为隐藏的,设置文字后显示出来tvContent.setVisibility(VISIBLE);tvContent.setText(text); } //设置文本字体大小 float textSize = a.getFloat(R.styleable.ButtonExtendM_textSize, 0); if (textSize != 0) {tvContent.setTextSize(textSize); } //设置两个控件之间的间距 spacing = a.getDimensionPixelSize(R.styleable.ButtonExtendM_spacing, ConvertM.dp2px(context, 8)); //设置两个控件的位置结构 mStyle = a.getInt(R.styleable.ButtonExtendM_style, 0); setIconStyle(mStyle); a.recycle();}setOnTouchListener(new OnTouchListener() { @Override public boolean onTouch(View arg0, MotionEvent event) {//根据touch事件设置按下抬起的样式return setTouchStyle(event.getAction()); }});setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) {if (onClickListener != null) { onClickListener.onClick(v);} }}); } /*** 根据按下或者抬起来改变背景和文字样式** @param state* @return isCost*/ private boolean setTouchStyle(int state) {if (state == MotionEvent.ACTION_DOWN) { if (backColorPress != 0) {setBackgroundColor(backColorPress); } if (iconDrawablePress != null) {ivIcon.setImageDrawable(iconDrawablePress); } if (textColorPress != null) {tvContent.setTextColor(textColorPress); }}if (state == MotionEvent.ACTION_UP) { if (backColor != 0) {setBackgroundColor(backColor); } if (iconDrawable != null) {ivIcon.setImageDrawable(iconDrawable); } if (textColor != null) {tvContent.setTextColor(textColor); }}return isCost; } /*** 设置图标位置* 通过重置LayoutParams来设置两个控件的摆放位置* @param style*/ public void setIconStyle(int style) {mStyle = style;RelativeLayout.LayoutParams lp;switch (style) { case STYLE_ICON_LEFT:lp = new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);lp.addRule(RelativeLayout.CENTER_VERTICAL);ivIcon.setLayoutParams(lp);lp = new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);lp.addRule(RelativeLayout.CENTER_VERTICAL);lp.addRule(RelativeLayout.RIGHT_OF, ivIcon.getId());lp.leftMargin = spacing;tvContent.setLayoutParams(lp);break; case STYLE_ICON_RIGHT:lp = new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);lp.addRule(RelativeLayout.CENTER_VERTICAL);tvContent.setLayoutParams(lp);lp = new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);lp.addRule(RelativeLayout.CENTER_VERTICAL);lp.addRule(RelativeLayout.RIGHT_OF, tvContent.getId());lp.leftMargin = spacing;ivIcon.setLayoutParams(lp);break; case STYLE_ICON_UP:lp = new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);lp.addRule(RelativeLayout.CENTER_HORIZONTAL);ivIcon.setLayoutParams(lp);lp = new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);lp.addRule(RelativeLayout.CENTER_HORIZONTAL);lp.addRule(RelativeLayout.BELOW, ivIcon.getId());lp.leftMargin = spacing;tvContent.setLayoutParams(lp);break; case STYLE_ICON_DOWN:lp = new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);lp.addRule(RelativeLayout.CENTER_HORIZONTAL);tvContent.setLayoutParams(lp);lp = new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);lp.addRule(RelativeLayout.CENTER_HORIZONTAL);lp.addRule(RelativeLayout.BELOW, tvContent.getId());lp.leftMargin = spacing;ivIcon.setLayoutParams(lp);break; default:break;} } /*** 设置View的背景色** @param backColor*/ public void setBackColor(int backColor) {this.backColor = backColor;setBackgroundColor(backColor); } /*** 设置View被按下时的背景色** @param backColorPress*/ public void setBackColorPress(int backColorPress) {this.backColorPress = backColorPress; } /*** 设置icon的图片** @param iconDrawable*/ public void setIconDrawable(Drawable iconDrawable) {this.iconDrawable = iconDrawable;ivIcon.setImageDrawable(iconDrawable); } /*** 设置View被按下时的icon的图片** @param iconDrawablePress*/ public void setIconDrawablePress(Drawable iconDrawablePress) {this.iconDrawablePress = iconDrawablePress; } /*** 设置文字的颜色** @param textColor*/ public void setTextColor(int textColor) {if (textColor == 0) return;this.textColor = ColorStateList.valueOf(textColor);tvContent.setTextColor(this.textColor); } /*** 设置View被按下时文字的颜色** @param textColorPress*/ public void setTextColorPress(int textColorPress) {if (textColorPress == 0) return;this.textColorPress = ColorStateList.valueOf(textColorPress); } /*** 设置显示的文本内容** @param text*/ public void setText(CharSequence text) {//默认为隐藏的,设置文字后显示出来tvContent.setVisibility(VISIBLE);tvContent.setText(text); } /*** 获取显示的文本** @return*/ public String getText() {return tvContent.getText().toString(); } /*** 设置文本字体大小** @param size*/ public void setTextSize(float size) {tvContent.setTextSize(size); } /*** 设置两个控件之间的间距** @param spacing*/ public void setSpacing(int spacing) {this.spacing = ConvertM.dp2px(mContext, spacing);//设置完成后刷新一下两个控件的结构,避免先执行了setIconStyle后,setSpacing不生效setIconStyle(mStyle); }}
代码注释基本可以看懂具体的实现,接下来主要看下如何使用
在layout里直接引用ButtonExtendM即可,注意要添加
xmlns:landptf="http://schemas.android.com/apk/res-auto"

<com.landptf.view.ButtonExtendM android:id="@+id/bem_back" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerVertical="true" android:layout_marginLeft="8dp" landptf:iconDrawable="@drawable/title_back" landptf:iconDrawablePress="@drawable/title_back_selected" landptf:textColor="@android:color/white" landptf:spacing="4dp" landptf:text="返回"/>
这个是实现的菜单栏的返回按钮,左右结构,icon在左为默认样式,注意一下*Press的属性,主要是用来设置控件被按下后的效果的。
再来看一个上下结构的
<com.landptf.view.ButtonExtendM android:layout_width="0dp" android:layout_height="match_parent" android:layout_weight="1" landptf:iconDrawable="@drawable/icon_home_page" landptf:text="首页" landptf:style="iconUp" />
只需要设置landptf:style即可,同时也可以通过java代码实现
setIconStyle(ButtonExtendM.STYLE_ICON_UP)

全部代码已托管到开源中国的码云上,欢迎下载,地址:https://git.oschina.net/landptf/landptf.git
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持脚本之家。