类似支付宝支付密码的edittext

public class PayPwdEditText extends RelativeLayout{

private EditText editText; //文本编辑框
private Context context;

private LinearLayout linearLayout; //文本密码的文本
private TextView[] textViews; //文本数组

private int pwdlength = 6; //密码长度， 默认6

private OnTextFinishListener onTextFinishListener;

public PayPwdEditText(Context context) {
this(context, null);
}

public PayPwdEditText(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}

public PayPwdEditText(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
this.context = context;
}

/**
* @param bgdrawable 背景drawable
* @param pwdlength 密码长度
* @param splilinewidth 分割线宽度
* @param splilinecolor 分割线颜色
* @param pwdcolor 密码字体颜色
* @param pwdsize 密码字体大小
*/
public void initStyle(int bgdrawable, int pwdlength, float splilinewidth, int splilinecolor, int pwdcolor, int pwdsize)
{
this.pwdlength = pwdlength;
initEdit(bgdrawable);
initShowInput(bgdrawable, pwdlength, splilinewidth, splilinecolor, pwdcolor, pwdsize);
}

/**
* 初始化编辑框
* @param bgcolor
*/
private void initEdit(int bgcolor)
{
editText = new EditText(context);
editText.setBackgroundResource(bgcolor);
editText.setCursorVisible(false);//选中也没有光标
editText.setTextSize(0);
editText.setInputType(InputType.TYPE_NUMBER_VARIATION_PASSWORD | InputType.TYPE_CLASS_NUMBER);
editText.setFilters(new InputFilter[]{new InputFilter.LengthFilter(pwdlength)});//限制字数
editText.addTextChangedListener(new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
Editable etext = editText.getText();
Selection.setSelection(etext, etext.length());//定位光标在最后位置
}

@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {

}

@Override
public void afterTextChanged(Editable s) {
initDatas(s);
if(s.length() == pwdlength)
{
if(onTextFinishListener != null)
{
onTextFinishListener.onFinish(s.toString().trim());
}
}
}
});
LayoutParams lp = new LayoutParams(LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT);
lp.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM, RelativeLayout.TRUE);
addView(editText, lp);

}

/**
* @param bgcolor 背景drawable
* @param pwdlength 密码长度
* @param slpilinewidth 分割线宽度
* @param splilinecolor 分割线颜色
* @param pwdcolor 密码字体颜色
* @param pwdsize 密码字体大小
*/
public void initShowInput(int bgcolor, int pwdlength, float slpilinewidth, int splilinecolor, int pwdcolor, int pwdsize)
{
//添加密码框父布局
linearLayout = new LinearLayout(context);
linearLayout.setBackgroundResource(bgcolor);
LayoutParams layoutParams = new LayoutParams(LayoutParams.MATCH_PARENT,LayoutParams.MATCH_PARENT);
linearLayout.setLayoutParams(layoutParams);
linearLayout.setOrientation(LinearLayout.HORIZONTAL);
addView(linearLayout);

//添加密码框
textViews = new TextView[pwdlength];
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(0,LayoutParams.MATCH_PARENT);
params.weight = 1;
params.gravity = Gravity.CENTER;

LinearLayout.LayoutParams params2 = new LinearLayout.LayoutParams(dip2px(context, slpilinewidth),LayoutParams.MATCH_PARENT);
for(int i = 0; i < textViews.length; i++)
{
final int index = i;
TextView textView = new TextView(context);
textView.setGravity(Gravity.CENTER);
textViews[i] = textView;
textViews[i].setTextSize(pwdsize);
textViews[i].setTextColor(context.getResources().getColor(pwdcolor));
// 设置textview的格式为数字和密码型

textViews[i].setInputType(InputType.TYPE_CLASS_NUMBER|InputType.TYPE_NUMBER_VARIATION_PASSWORD);
linearLayout.addView(textView, params);

if(i < textViews.length - 1)
{
View view = new View(context);
view.setBackgroundColor(context.getResources().getColor(splilinecolor));
linearLayout.addView(view, params2);
}
}
}

/**
* 是否显示明文
* @param showPwd
*/
public void setShowPwd(boolean showPwd) {
int length = textViews.length;
for(int i = 0; i < length; i++) {
if (showPwd) {
textViews[i].setTransformationMethod(PasswordTransformationMethod.getInstance());//密码隐式
} else {
textViews[i].setTransformationMethod(HideReturnsTransformationMethod.getInstance());//密码显式
}
}
}

/**
* 设置显示类型
* @param type
*/
public void setInputType(int type)
{
int length = textViews.length;
for(int i = 0; i < length; i++) {
textViews[i].setInputType(type);
}
}

/**
* 清除文本框
*/
public void clearText()
{
editText.setText("");
for(int i = 0; i < pwdlength; i++)
{
textViews[i].setText("");
}
}

public void setOnTextFinishListener(OnTextFinishListener onTextFinishListener) {
this.onTextFinishListener = onTextFinishListener;
}

/**
* 根据输入字符，显示密码个数
* @param s
*/
public void initDatas(Editable s)
{
if(s.length() > 0)
{
int length = s.length();
for(int i = 0; i < pwdlength; i++)
{
if(i < length)
{
for(int j = 0; j < length; j++)
{
char ch = s.charAt(j);
textViews[j].setText(String.valueOf(ch));
}
}
else
{
textViews[i].setText("");
}
}
}
else
{
for(int i = 0; i < pwdlength; i++)
{
textViews[i].setText("");
}
}
}

public String getPwdText()
{
if(editText != null)
return editText.getText().toString().trim();
return "";
}

public static int dip2px(Context context, float dipValue) {
final float scale = context.getResources().getDisplayMetrics().density;
return (int) (dipValue * scale + 0.5f);
}

public interface OnTextFinishListener
{
void onFinish(String str);
}

}