android自定义控件，动态设置Button的样式

浏览数：15 / 时间：2015年06月11日

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:

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图1 初始状态图2 按下第一行的TEXT0

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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]);
        }
    }
}