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[操作系统]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

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.

<??><LinearLayout ="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