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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

android自定义控件，动态设置Button的样式

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]);   }  } }