Android自定义控件实现icon+文字的多种效果

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

第二步 新建布局文件view_button_extend_m.xml

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;


public class ButtonExtendM extends RelativeLayout {
 
 public static final int STYLE_ICON_LEFT = 0;
 
 public static final int STYLE_ICON_RIGHT = 1;
 
 public static final int STYLE_ICON_UP = 2;
 
 public static final int STYLE_ICON_DOWN = 3;

 
 private ImageView ivIcon;
 private TextView tvContent;
 
 private Context mContext;
 
 private int backColor = 0;
 
 private int backColorPress = 0;
 
 private Drawable iconDrawable = null;
 
 private Drawable iconDrawablePress = null;
 
 private ColorStateList textColor = null;
 
 private ColorStateList textColorPress = null;
 
 private int spacing = 8;
 
 private int mStyle = STYLE_ICON_LEFT;
 
 private boolean isCost = true;

 private onClickListener onClickListener = null;

 public interface onClickListener {
  void onClick(View v);
 }

 
 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);
    }
   }
  });
 }

 
 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;
 }

 
 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;
  }
 }

 
 public void setBackColor(int backColor) {
  this.backColor = backColor;
  setBackgroundColor(backColor);
 }

 
 public void setBackColorPress(int backColorPress) {
  this.backColorPress = backColorPress;
 }

 
 public void setIconDrawable(Drawable iconDrawable) {
  this.iconDrawable = iconDrawable;
  ivIcon.setImageDrawable(iconDrawable);
 }

 
 public void setIconDrawablePress(Drawable iconDrawablePress) {
  this.iconDrawablePress = iconDrawablePress;
 }

 
 public void setTextColor(int textColor) {
  if (textColor == 0) return;
  this.textColor = ColorStateList.valueOf(textColor);
  tvContent.setTextColor(this.textColor);
 }

 
 public void setTextColorPress(int textColorPress) {
  if (textColorPress == 0) return;
  this.textColorPress = ColorStateList.valueOf(textColorPress);
 }

 
 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);
 }

 
 public String getText() {
  return tvContent.getText().toString();
 }

 
 public void setTextSize(float size) {
  tvContent.setTextSize(size);
 }

 
 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"

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

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考高分网。