android自定义控件，动态设置Button的样式

今天来看一个通过重写Button来动态实现一些效果，如圆角矩形、圆形、按下改变字体，改变背景色，改变背景图等
在此说明一下，这种实现方式绝对不是唯一的，而且通过xml文件即可简单实现，这样做只是为了将控件的样式完全由代码实现，更方便打包应用于其他项目
下面来看几张效果图:


  

 
图1 初始状态                                            图2 按下第一行的TEXT0


   


图3 按下第二行的TEXT1                         图4 按下第三行的TEXT2，按住截屏时，没有截到Toast的提示
下面看代码，共两个类，一个布局文件
1 ButtonM.java:重写Button，可单独打包应用于其他项目

package landptf.control;

import android.content.Context;
import android.graphics.Color;
import android.graphics.drawable.GradientDrawable;
import android.util.AttributeSet;
import android.view.Gravity;
import android.view.MotionEvent;
import android.view.View;
import android.widget.Button;
/**
* 重写Button,自定义Button样式
* @author landptf
* @date 2015-6-8
*/
public class ButtonM extends Button{
private GradientDrawable gradientDrawable;//控件的样式
private String backColors = "";//背景色，String类型
private int backColori = 0;//背景色，int类型
private String backColorSelecteds = "";//按下后的背景色，String类型
private int backColorSelectedi = 0;//按下后的背景色，int类型
private int backGroundImage = 0;//背景图，只提供了Id
private int backGroundImageSeleted = 0;//按下后的背景图，只提供了Id
private String textColors = "";//文字颜色，String类型
private int textColori = 0;//文字颜色，int类型
private String textColorSeleteds = "";//按下后的文字颜色，String类型
private int textColorSeletedi = 0;//按下后的文字颜色，int类型
private float radius = 8;//圆角半径
private int shape = 0;//圆角样式，矩形、圆形等，由于矩形的Id为0，默认为矩形
private Boolean fillet = false;//是否设置圆角

public ButtonM(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
init();
}

public ButtonM(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}

public ButtonM(Context context) {
this(context, null);
}

private void init() {
//将Button的默认背景色改为透明，本人不喜欢原来的颜色
if (fillet) {
if (gradientDrawable == null) {
gradientDrawable = new GradientDrawable();
}
gradientDrawable.setColor(Color.TRANSPARENT);
}else {
setBackgroundColor(Color.TRANSPARENT);
}
//设置文字默认居中
setGravity(Gravity.CENTER);
//设置Touch事件
setOnTouchListener(new OnTouchListener() {
@Override
public boolean onTouch(View arg0, MotionEvent event) {
//按下改变样式
setColor(event.getAction());
//此处设置为false，防止Click事件被屏蔽
return false;
}
});
}
//改变样式
private void setColor(int state){
if (state == MotionEvent.ACTION_DOWN) {
//按下
if (backColorSelectedi != 0) {
//先判断是否设置了按下后的背景色int型
if (fillet) {
if (gradientDrawable == null) {
gradientDrawable = new GradientDrawable();
}
gradientDrawable.setColor(backColorSelectedi);
}else {
setBackgroundColor(backColorSelectedi);
}
}else if (!backColorSelecteds.equals("")) {
if (fillet) {
if (gradientDrawable == null) {
gradientDrawable = new GradientDrawable();
}
gradientDrawable.setColor(Color.parseColor(backColorSelecteds));
}else {
setBackgroundColor(Color.parseColor(backColorSelecteds));
}
}
//判断是否设置了按下后文字的颜色
if (textColorSeletedi != 0) {
setTextColor(textColorSeletedi);
}else if (!textColorSeleteds.equals("")) {
setTextColor(Color.parseColor(textColorSeleteds));
}
//判断是否设置了按下后的背景图
if (backGroundImageSeleted != 0) {
setBackgroundResource(backGroundImageSeleted);
}
}
if (state == MotionEvent.ACTION_UP) {
//抬起
if (backColori == 0 && backColors.equals("")) {
//如果没有设置背景色，默认改为透明
if (fillet) {
if (gradientDrawable == null) {
gradientDrawable = new GradientDrawable();
}
gradientDrawable.setColor(Color.TRANSPARENT);
}else {
setBackgroundColor(Color.TRANSPARENT);
}
}else if(backColori != 0){
if (fillet) {
if (gradientDrawable == null) {
gradientDrawable = new GradientDrawable();
}
gradientDrawable.setColor(backColori);
}else {
setBackgroundColor(backColori);
}
}else {
if (fillet) {
if (gradientDrawable == null) {
gradientDrawable = new GradientDrawable();
}
gradientDrawable.setColor(Color.parseColor(backColors));
}else {
setBackgroundColor(Color.parseColor(backColors));
}
}
//如果为设置字体颜色，默认为黑色
if (textColori == 0 && textColors.equals("")) {
setTextColor(Color.BLACK);
}else if (textColori != 0) {
setTextColor(textColori);
}else {
setTextColor(Color.parseColor(textColors));
}
if (backGroundImage != 0) {
setBackgroundResource(backGroundImage);
}
}
}

/**
* 设置按钮的背景色,如果未设置则默认为透明
* @param backColor
*/
public void setBackColor(String backColor) {
this.backColors = backColor;
if (backColor.equals("")) {
if (fillet) {
if (gradientDrawable == null) {
gradientDrawable = new GradientDrawable();
}
gradientDrawable.setColor(Color.TRANSPARENT);
}else {
setBackgroundColor(Color.TRANSPARENT);
}
}else {
if (fillet) {
if (gradientDrawable == null) {
gradientDrawable = new GradientDrawable();
}
gradientDrawable.setColor(Color.parseColor(backColor));
}else {
setBackgroundColor(Color.parseColor(backColor));
}
}
}

/**
* 设置按钮的背景色,如果未设置则默认为透明
* @param backColor
*/
public void setBackColor(int backColor) {
this.backColori = backColor;
if (backColori == 0) {
if (fillet) {
if (gradientDrawable == null) {
gradientDrawable = new GradientDrawable();
}
gradientDrawable.setColor(Color.TRANSPARENT);
}else {
setBackgroundColor(Color.TRANSPARENT);
}
}else {
if (fillet) {
if (gradientDrawable == null) {
gradientDrawable = new GradientDrawable();
}
gradientDrawable.setColor(backColor);
}else {
setBackgroundColor(backColor);
}
}
}

/**
* 设置按钮按下后的颜色
* @param backColorSelected
*/
public void setBackColorSelected(int backColorSelected) {
this.backColorSelectedi = backColorSelected;
}

/**
* 设置按钮按下后的颜色
* @param backColorSelected
*/
public void setBackColorSelected(String backColorSelected) {
this.backColorSelecteds = backColorSelected;
}

/**
* 设置按钮的背景图
* @param backGroundImage
*/
public void setBackGroundImage(int backGroundImage) {
this.backGroundImage = backGroundImage;
if (backGroundImage != 0) {
setBackgroundResource(backGroundImage);
}
}

/**
* 设置按钮按下的背景图
* @param backGroundImageSeleted
*/
public void setBackGroundImageSeleted(int backGroundImageSeleted) {
this.backGroundImageSeleted = backGroundImageSeleted;
}

/**
* 设置按钮圆角半径大小
* @param radius
*/
public void setRadius(float radius) {
if (gradientDrawable == null) {
gradientDrawable = new GradientDrawable();
}
gradientDrawable.setCornerRadius(radius);
}

/**
* 设置按钮文字颜色
* @param textColor
*/
public void setTextColors(String textColor) {
this.textColors = textColor;
setTextColor(Color.parseColor(textColor));
}

/**
* 设置按钮文字颜色
* @param textColor
*/
public void setTextColori(int textColor) {
this.textColori = textColor;
setTextColor(textColor);
}

/**
* 设置按钮按下的文字颜色
* @param textColor
*/
public void setTextColorSelected(String textColor) {
this.textColorSeleteds = textColor;
}

/**
* 设置按钮按下的文字颜色
* @param textColor
*/
public void setTextColorSelected(int textColor) {
this.textColorSeletedi = textColor;
}

/**
* 按钮的形状
* @param shape
*/
public void setShape(int shape) {
this.shape = shape;
}

/**
* 设置其是否为圆角
* @param fillet
*/
@SuppressWarnings("deprecation")
public void setFillet(Boolean fillet) {
this.fillet = fillet;
if (fillet) {
if (gradientDrawable == null) {
gradientDrawable = new GradientDrawable();
}
//GradientDrawable.RECTANGLE
gradientDrawable.setShape(shape);
gradientDrawable.setCornerRadius(radius);
setBackgroundDrawable(gradientDrawable);
}
}
}

2 activity_buttonm.xml 布局文件，为了演示效果定义了三个空的LinearLayout，下面将分别为其添加子控件

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >

<LinearLayout
android:id="@+id/ll_button1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="30dp"
android:orientation="horizontal">

</LinearLayout>

<LinearLayout
android:id="@+id/ll_button2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="30dp"
android:orientation="horizontal">

</LinearLayout>

<LinearLayout
android:id="@+id/ll_button3"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="30dp"
android:orientation="horizontal">

</LinearLayout>

</LinearLayout>

3 ButtonMActivity.java：ButtonM测试类

package landptf.control;

import android.app.Activity;
import android.graphics.Color;
import android.graphics.drawable.GradientDrawable;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup.LayoutParams;
import android.widget.LinearLayout;
import android.widget.Toast;

/**
* ButtonM测试类
* @author landptf
* @date 2015-6-8
*/
public class ButtonMActivity extends Activity{

//定义三个空布局用来装载Button控件，只为演示效果，实际开发中不推荐使用
private LinearLayout llButtonM1;
private LinearLayout llButtonM2;
private LinearLayout llButtonM3;
//定义三个ButtonM数组
private ButtonM[] buttonM1;
private ButtonM[] buttonM2;
private ButtonM[] buttonM3;
//定义两组颜色值，按下与未按下的按钮背景色
private static final String[] colorList = {"#7067E2","#FF618F","#B674D2","#00C2EB"};
private static final String[] colorSelectedList = {"#3C3779","#88354C","#613E70","#00677D"};

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_buttonm);
initView();
}

//初始化控件
private void initView() {
//实例化布局控件
llButtonM1 = (LinearLayout) findViewById(R.id.ll_button1);
llButtonM2 = (LinearLayout) findViewById(R.id.ll_button2);
llButtonM3 = (LinearLayout) findViewById(R.id.ll_button3);
//实例化控件数组，各定义4个
buttonM1 = new ButtonM[4];
buttonM2 = new ButtonM[4];
buttonM3 = new ButtonM[4];
//获取屏幕的宽度，每行四个Button，间隙为60共300，除4为每个控件的宽度
@SuppressWarnings("deprecation")
int btnWidth = (getWindowManager().getDefaultDisplay().getWidth() - 300)/4;
//定义第一个布局
LinearLayout.LayoutParams lp1;
for (int i = 0; i < 4; i++) {
//为buttonM1设置样式，直角矩形
buttonM1[i] = new ButtonM(this);
//字体颜色
buttonM1[i].setTextColori(android.graphics.Color.WHITE);
//字体大小
buttonM1[i].setTextSize(14);
//背景色
buttonM1[i].setBackColor(Color.parseColor(colorList[i]));
//选中的背景色
buttonM1[i].setBackColorSelected(Color.parseColor(colorSelectedList[i]));
//文字提示
buttonM1[i].setText("TEXT" + i);
//此处设置Id的值为i，否则onClick中v.getId()将永远为-1
buttonM1[i].setId(i);
//定义buttonM1的布局，宽度自适应，高度为宽度的0.6倍，权重为1
//也可以写成lp1 = new LinearLayout.LayoutParams(btnWidth,(int) (btnWidth * 0.6));
lp1 = new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT,(int) (btnWidth * 0.6), 1.0f);
//控件距离其右侧控件的距离，此处为60
lp1.setMargins(0,0,60,0);
buttonM1[i].setLayoutParams(lp1);
//设置buttonM1的点击事件
buttonM1[i].setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(ButtonMActivity.this, "您选择了第" + v.getId() + "个", Toast.LENGTH_SHORT).show();
}
});
//设置PaddingLeft为60
llButtonM1.setPadding(60, 0, 0, 0);
//将buttonM1添加到llButtonM1中
llButtonM1.addView(buttonM1[i]);
}

//定义第二个布局
LinearLayout.LayoutParams lp2;
for (int i = 0; i < 4; i++) {
//为buttonM2设置样式，圆角矩形
buttonM2[i] = new ButtonM(this);
buttonM2[i].setTextColori(android.graphics.Color.WHITE);
buttonM2[i].setTextSize(14);
//设置是否为圆角
buttonM2[i].setFillet(true);
//设置圆角的半径大小
buttonM2[i].setRadius(18);
buttonM2[i].setBackColor(Color.parseColor(colorList[i]));
buttonM2[i].setBackColorSelected(Color.parseColor(colorSelectedList[i]));
buttonM2[i].setText("TEXT" + i);
buttonM2[i].setId(i);
lp2 = new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT,(int) (btnWidth * 0.6), 1.0f);
lp2.setMargins(0,0,60,0);
buttonM2[i].setLayoutParams(lp2);
buttonM2[i].setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(ButtonMActivity.this, "您选择了第" + v.getId() + "个", Toast.LENGTH_SHORT).show();
}
});
llButtonM2.setPadding(60, 0, 0, 0);
llButtonM2.addView(buttonM2[i]);
}
//定义第三个布局
LinearLayout.LayoutParams lp3;
for (int i = 0; i < 4; i++) {
//为buttonM3设置样式，圆形
buttonM3[i] = new ButtonM(this);
buttonM3[i].setTextColori(android.graphics.Color.WHITE);
buttonM3[i].setTextSize(14);
//设置为圆形，默认为矩形，GradientDrawable.RECTANGLE
buttonM3[i].setShape(GradientDrawable.OVAL);
buttonM3[i].setFillet(true);
buttonM3[i].setBackColor(Color.parseColor(colorList[i]));
buttonM3[i].setBackColorSelected(Color.parseColor(colorSelectedList[i]));
buttonM3[i].setText("TEXT" + i);
buttonM3[i].setId(i);
lp3 = new LinearLayout.LayoutParams(btnWidth,btnWidth);
lp3.setMargins(0,0,60,0);
buttonM3[i].setLayoutParams(lp3);
buttonM3[i].setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(ButtonMActivity.this, "您选择了第" + v.getId() + "个", Toast.LENGTH_SHORT).show();
}
});
llButtonM3.setPadding(60, 0, 0, 0);
llButtonM3.addView(buttonM3[i]);
}
}
}

注释基本都说明了，可以慢慢积累这些控件，最终形成一个自己的控件库，在不同项目中完善，使之越来越强大
明天给大家介绍一下通过继承RelativeLayout，实现多个控件的组合，让不同项目应用，可避免每次都要重写

原文链接：http://www.cnblogs.com/landptf/p/4562203.html  感谢作者