自己封装的一个控件：EditText两边放加减按钮Button来控制输入框的数值
Demo 下载地址：
第一版：http://download.csdn.net/detail/zjjne/6740865
第二版：（修改部分BUG和添加从XML中实例化的Demo）http://download.csdn.net/detail/zjjne/8044679
转载请注明出处：
http://www.goteny.com/articles/2013/12/81.html
http://www.cnblogs.com/zjjne/p/3482842.html
效果图：
有三种构造方法
public AddAndSubView(Context context) //EditText中数值初始化为0
public AddAndSubView(Context context, int num) //带初始值构造
public AddAndSubView(Context context, AttributeSet attrs)
调用AddAndSubView方法
AddAndSubView addAndSubView = new AddAndSubView(MainActivity.this);
http://www.eoee.tk/articles/2013/12/81.html http://www.cnblogs.com/zjjne/p/3482842.html
设置EditText中数值的方法：
addAndSubView.setNum(30); 或在构造函数中设置数值
获取EditText中数值的方法：
addAndSubView.getNum();
转载请注明出处：
http://www.goteny.com/articles/2013/12/81.html
http://www.cnblogs.com/zjjne/p/3482842.html
动态获取EditText中数值的方法：
//设置AddAndSubView中数值变化的监听器OnNumChangeListener
//OnNumChangeListener为AddAndSubView的内部接口
//当AddAndSubView中数值变化时会触发onNumChange，需重写此方法
addAndSubView.setOnNumChangeListener(new OnNumChangeListener()
{ @Override
public void onNumChange(View view, int num)
{
textView.setText(Integer.toString(num));
}
});
//以Drawable形式 设置按钮背景图
public void Drawable(Drawable addBtnDrawable, Drawable subBtnDrawable)
//以资源Resource形式 设置按钮背景图
public void setButtonBgResource(int addBtnResource, int subBtnResource)
//设置按钮背景颜色
public void setButtonBgColor(int addBtnColor, int subBtnColor)
还有一些设置EditText宽高的函数，具体见源码
下面是详细效果图和代码：
源码：
import android.content.Context;
import android.graphics.drawable.Drawable;
import android.text.Editable;
import android.text.TextWatcher;
import android.util.AttributeSet;
import android.util.TypedValue;
import android.view.Gravity;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.LinearLayout;
import android.widget.Toast; /**
*
* @author ZJJ
*
*/
public class AddAndSubView extends LinearLayout
{
Context context;
LinearLayout mainLinearLayout; //主View，即AddAndSubView
LinearLayout leftLinearLayout; //内部左view
LinearLayout centerLinearLayout; //中间view
LinearLayout rightLinearLayout; //内部右view
OnNumChangeListener onNumChangeListener;
Button addButton;
Button subButton;
EditText editText;
int num; //editText中的数值
int editTextLayoutWidth; //editText视图的宽度
int editTextLayoutHeight; //editText视图的宽度
int editTextMinimumWidth; //editText视图的最小宽度
int editTextMinimumHeight; //editText视图的最小高度
int editTextMinHeight; //editText文本区域的最小高度
int editTextHeight; //editText文本区域的高度 public AddAndSubView(Context context)
{
super(context);
this.context = context;
num = 0;
control();
} /**
* 带初始数据实例化
* @param context
* @param 初始数据
*/
public AddAndSubView(Context context, int num)
{
super(context);
this.context = context;
this.num = num;
control();
} public AddAndSubView(Context context, AttributeSet attrs)
{
super(context, attrs);
this.context = context;
67 num = 0;
control();
} /**
*
*/
private void control()
{
initTextWithHeight();
initialise(); //实例化内部view
setViewsLayoutParm(); //设置内部view的布局参数
insertView(); //将子view放入linearlayout中
setViewListener();
} /**
* 初始化EditText宽高参数
*/
private void initTextWithHeight()
{
editTextLayoutWidth = -1;
editTextLayoutHeight = -1;
editTextMinimumWidth = -1;
editTextMinimumHeight = -1;
editTextMinHeight = -1;
editTextHeight = -1;
} /**
* 实例化内部View
*/
private void initialise()
{
mainLinearLayout = new LinearLayout(context);
leftLinearLayout = new LinearLayout(context);
centerLinearLayout = new LinearLayout(context);
rightLinearLayout = new LinearLayout(context);
addButton = new Button(context);
subButton = new Button(context);
editText = new EditText(context); addButton.setText("+");
subButton.setText("-");
addButton.setTag("+");
subButton.setTag("-");
//设置输入类型为数字
editText.setInputType(android.text.InputType.TYPE_CLASS_NUMBER);
editText.setText(String.valueOf(num));
} /**
* 设置内部view的布局参数
*/
private void setViewsLayoutParm()
{
LayoutParams viewLayoutParams = new LayoutParams(
LinearLayout.LayoutParams.WRAP_CONTENT,
LinearLayout.LayoutParams.WRAP_CONTENT); addButton.setLayoutParams(viewLayoutParams);
subButton.setLayoutParams(viewLayoutParams);
editText.setLayoutParams(viewLayoutParams);
editText.setGravity(Gravity.CENTER);
setTextWidthHeight(); viewLayoutParams.gravity = Gravity.CENTER;
centerLinearLayout.setLayoutParams(viewLayoutParams);
//让editText不自动获得焦点
centerLinearLayout.setFocusable(true);
centerLinearLayout.setFocusableInTouchMode(true); viewLayoutParams.width = LinearLayout.LayoutParams.WRAP_CONTENT;
viewLayoutParams.weight = 1.0f;
leftLinearLayout.setLayoutParams(viewLayoutParams); //参数：宽、高、比重，比重为1.0
rightLinearLayout.setLayoutParams(viewLayoutParams); //参数：宽、高、比重，比重为1.0 viewLayoutParams.width = LinearLayout.LayoutParams.MATCH_PARENT;
mainLinearLayout.setLayoutParams(viewLayoutParams);
mainLinearLayout.setOrientation(LinearLayout.HORIZONTAL);
} /**
* 设置EditText视图和文本区域宽高
*/
private void setTextWidthHeight()
{
float fPx; //设置视图最小宽度
if (editTextMinimumWidth < 0)
{
// 将数据从dip(即dp)转换到px，第一参数为数据原单位（此为DIP），第二参数为要转换的数据值
fPx = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP,
80f, context.getResources().getDisplayMetrics());
editTextMinimumWidth = Math.round(fPx);
}
editText.setMinimumWidth(editTextMinimumWidth); //设置文本区域高度
if (editTextHeight > 0)
{
if (editTextMinHeight >= 0 && editTextMinHeight > editTextHeight)
{
editTextHeight = editTextMinHeight;
}
editText.setHeight(editTextHeight);
} //设置视图高度
if (editTextLayoutHeight > 0)
{
if (editTextMinimumHeight > 0 &&
editTextMinimumHeight > editTextLayoutHeight)
{
editTextLayoutHeight = editTextMinimumHeight;
} LayoutParams layoutParams = (LayoutParams) editText.getLayoutParams();
layoutParams.height = editTextLayoutHeight;
editText.setLayoutParams(layoutParams);
} //设置视图宽度
if (editTextLayoutWidth > 0)
{
if (editTextMinimumWidth > 0 &&
editTextMinimumWidth > editTextLayoutWidth)
{
editTextLayoutWidth = editTextMinimumWidth;
} LayoutParams layoutParams = (LayoutParams) editText.getLayoutParams();
layoutParams.width = editTextLayoutWidth;
editText.setLayoutParams(layoutParams);
}
} /**
* 将子view放入linearlayout中
*/
private void insertView()
{
mainLinearLayout.addView(leftLinearLayout, 0);
mainLinearLayout.addView(centerLinearLayout, 1);
mainLinearLayout.addView(rightLinearLayout, 2); leftLinearLayout.addView(addButton);
centerLinearLayout.addView(editText);
rightLinearLayout.addView(subButton); addView(mainLinearLayout); //将整块视图添加进当前AddAndSubView中
} /**
* 设置editText中的值
* @param num
*/
public void setNum(int num)
{
this.num = num;
editText.setText(String.valueOf(num));
} /**
* 获取editText中的值
* @return
*/
public int getNum()
{
if ( editText.getText().toString() != null )
{
return Integer.parseInt(editText.getText().toString());
}
else {
return 0;
}
} /**
* 设置EditText视图的最小高度
* @param minimumWidth EditText的最小高度，单位px
*/
public void setEditTextMinimumWidth(int editTextMinimumWidth)
{
//设置视图最小宽度
if (editTextMinimumWidth > 0)
{
this.editTextMinimumWidth = editTextMinimumWidth;
editText.setMinimumWidth(editTextMinimumWidth);
} } /**
* 设置EditText视图的最小高度
* @param editTextMinimumHeight EditText视图的最小高度,单位：px
*/
public void setEditTextMinimumHeight(int editTextMinimumHeight)
{
//设置视图最小高度
if (editTextMinimumHeight > 0)
{
this.editTextMinimumHeight = editTextMinimumHeight;
editText.setMinimumHeight(editTextMinimumHeight);
}
} /**
* 设置EditText文本区域的最小高度
* @param editTextMinHeight EditText文本区域的最小高度,单位：px
*/
public void setEditTextMinHeight(int editTextMinHeight)
{
//设置文本区域最小高度
if (editTextMinHeight > 0)
{
this.editTextMinHeight = editTextMinHeight;
editText.setMinHeight(editTextMinHeight);
}
} /**
* 设置EditText文本区域的高度
* @param editTextHeight EditText文本区域的高度,单位：px
*/
public void setEditTextHeight(int editTextHeight)
{
this.editTextHeight = editTextHeight;
setTextWidthHeight();
} /**
* 设置EditText视图的宽度
* @param editTextLayoutWidth 设置EditText视图的宽度,单位px
*/
public void setEditTextLayoutWidth(int editTextLayoutWidth)
{
this.editTextLayoutWidth = editTextLayoutWidth;
setTextWidthHeight();
} /**
* 设置EditText视图的高度
* @param editTextLayoutHeight EditText视图的最小高度，单位px
*/
public void setEditTextLayoutHeight(int editTextLayoutHeight)
{
this.editTextLayoutHeight = editTextLayoutHeight;
setTextWidthHeight();
} /**
* 以Drawable形式 设置按钮背景图
* @param addBtnDrawable 加号背景图
* @param subBtnDrawable 减号背景图
*/
public void Drawable(Drawable addBtnDrawable, Drawable subBtnDrawable)
{
//不推荐用setBackgroundDrawable，新API推荐用setBackground（在API 16中）
addButton.setBackgroundDrawable(addBtnDrawable);
subButton.setBackgroundDrawable(subBtnDrawable);
addButton.setText("");
subButton.setText("");
} /**
* 以资源Resource形式 设置按钮背景图
* @param addBtnResource 加号背景图
* @param subBtnResource 减号背景图
*/
public void setButtonBgResource(int addBtnResource, int subBtnResource)
{
addButton.setBackgroundResource(addBtnResource);
subButton.setBackgroundResource(subBtnResource);
addButton.setText("");
subButton.setText("");
} /**
* 设置按钮背景色
* @param addBtnColor 加号背景色
* @param subBtnColor 减号背景色
*/
public void setButtonBgColor(int addBtnColor, int subBtnColor)
{
addButton.setBackgroundColor(addBtnColor);
subButton.setBackgroundColor(subBtnColor);
} /**
* 设置EditText文本变化监听
* @param onNumChangeListener
*/
public void setOnNumChangeListener(OnNumChangeListener onNumChangeListener)
{
this.onNumChangeListener = onNumChangeListener;
} /**
* 设置文本变化相关监听事件
*/
private void setViewListener()
{
addButton.setOnClickListener(new OnButtonClickListener());
subButton.setOnClickListener(new OnButtonClickListener());
editText.addTextChangedListener(new OnTextChangeListener());
} /**
* 加减按钮事件监听器
* @author ZJJ
*
*/
class OnButtonClickListener implements OnClickListener
{ @Override
public void onClick(View v)
{
String numString = editText.getText().toString();
if (numString == null || numString.equals(""))
{
num = 0;
editText.setText("0");
} else
{
if (v.getTag().equals("+"))
{
if (++num < 0) //先加，再判断
{
num--;
Toast.makeText(context, "请输入一个大于0的数字",
Toast.LENGTH_SHORT).show();
} else
{
editText.setText(String.valueOf(num)); if (onNumChangeListener != null)
{
onNumChangeListener.onNumChange(AddAndSubView.this, num);
}
}
} else if (v.getTag().equals("-"))
{
if (--num < 0) //先减，再判断
{
num++;
Toast.makeText(context, "请输入一个大于0的数字",
Toast.LENGTH_SHORT).show();
} else
{
editText.setText(String.valueOf(num));
if (onNumChangeListener != null)
{
onNumChangeListener.onNumChange(AddAndSubView.this, num);
}
}
}
}
}
} /**
* EditText输入变化事件监听器
* @author ZJJ
*
*/
class OnTextChangeListener implements TextWatcher
{ @Override
public void afterTextChanged(Editable s)
{
String numString = s.toString();
if(numString == null || numString.equals(""))
{
num = 0;
if (onNumChangeListener != null)
{
onNumChangeListener.onNumChange(AddAndSubView.this, num);
}
}
else {
int numInt = Integer.parseInt(numString);
if (numInt < 0)
{
Toast.makeText(context, "请输入一个大于0的数字",
Toast.LENGTH_SHORT).show();
} else
{
//设置EditText光标位置 为文本末端
editText.setSelection(editText.getText().toString().length());
num = numInt;
if (onNumChangeListener != null)
{
onNumChangeListener.onNumChange(AddAndSubView.this, num);
}
}
}
} @Override
public void beforeTextChanged(CharSequence s, int start, int count,
int after)
{ } @Override
public void onTextChanged(CharSequence s, int start, int before,
int count)
{ } } public interface OnNumChangeListener
{
/**
* 输入框中的数值改变事件
* @param view 整个AddAndSubView
* @param num 输入框的数值
*/
public void onNumChange(View view, int num);
} }
Demo 下载地址：
第一版：http://download.csdn.net/detail/zjjne/6740865
第二版：（修改部分BUG和添加从XML中实例化的Demo）http://download.csdn.net/detail/zjjne/8044679
转载请注明出处：
http://www.goteny.com/articles/2013/12/81.html
http://www.cnblogs.com/zjjne/p/3482842.html
THE END