Android -- Button, 设置字体大小写，自定义点击效果

Android – Button, 设置字体大小写，自定义点击效果， 双击监听

1. 取消字母全部大写：

   android:textAllCaps="false"
   

2. 自定义点击效果（点击时颜色变化）：

   
   <selector xmlns:android="http://schemas.android.com/apk/res/android">
       <item android:state_pressed="false">
           <shape android:shape="rectangle">
               <stroke android:color="@color/colorPrimary"
                   android:width="1dp"/>
               <solid android:color="@color/colorPrimary"/>
               <corners android:radius="15dp"/>
           shape>
       item>
   
       <item android:state_pressed="true">
           <shape android:shape="rectangle">
               <stroke android:color="@color/colorTY_Half"
                   android:width="1dp"/>
               <solid android:color="@color/colorTY_Half"/>
               <corners android:radius="15dp"/>
           shape>
       item>
   selector>
   

3. 双击监听

   1. 自定义接口：

      public class OnDoubleClickListener implements View.OnTouchListener{
          private int count = 0;//点击次数
          private long firstClick = 0;//第一次点击时间
          private long secondClick = 0;//第二次点击时间
          private final int duration = 500;//预设两次点击最多间隔时间
      
          private Callback callback;
      
          public interface Callback{
              void onDoubleClick();
          }
      
          public OnDoubleClickListener(Callback callback) {
              this.callback = callback;
          }
      
          @Override
          public boolean onTouch(View v, MotionEvent event) {
              if (event.getAction() == MotionEvent.ACTION_DOWN){
                  count ++;
                  if (count == 1){
                      firstClick = System.currentTimeMillis();
                  }else if (count == 2){
                      secondClick = System.currentTimeMillis();
                      if (secondClick - firstClick<=duration){
                          if (callback!=null){
                              callback.onDoubleClick();//调用重写方法
                          }
                          count = 0;
                          firstClick = 0;
                          return true;
                      }else {
                          //间隔时间超过设定值，重新计算
                          firstClick = secondClick;
                          count = 1;
                      }
                      secondClick = 0;
                  }
              }
              //最后要返回false 否则单击事件会被屏蔽掉
              return false;
          }
      }
      

   2. 调用：

      view.setOnTouchListener(new OnDoubleClickListener(new OnDoubleClickListener.Callback() {
                  @Override
                  public void onDoubleClick() {
                      //do something
                  }
              }));