Android EditText 输入数字和小数，设置输入的范围0.001-1000

<EditText
android:id="@+id/et_num"
android:layout_width="fill_parent"
android:layout_height="60dp"
android:gravity="center"
android:numeric="decimal" />

/**
* 输入框输入值的范围  1000-0.001（EditText的属性：android:numeric="decimal"）
* @param txtInput
*/
public static void setRegion(EditText txtInput)
{
txtInput.addTextChangedListener(new TextWatcher()
{
public void afterTextChanged(Editable edt)
{
String temp = edt.toString();
int posDot = temp.indexOf(".");
//小数点之前保留3位数字或者一千
if (posDot <= 0){
//temp
if(temp.equals("1000")){
return;
}else{
if(temp.length()<=3){
return;
}else{
edt.delete(3, 4);
return;
}
}
}
//保留三位小数
if (temp.length() - posDot - 1 > 3)
{
edt.delete(posDot + 4, posDot + 5);
}
}
public void beforeTextChanged(CharSequence arg0, int arg1, int arg2, int arg3) {

}
public void onTextChanged(CharSequence arg0, int arg1, int arg2, int arg3) {

}
});
}