怎么在Android中实现一个带清除按钮、密码可见的输入框-创新互联
这期内容当中小编将会给大家带来有关怎么在Android中实现一个带清除按钮、密码可见的输入框，文章内容丰富且以专业的角度为大家分析和叙述，阅读完这篇文章希望大家可以有所收获。
一、自定义控件ClearEditText
我的这个自带清除、小眼睛的控件，是一个自定义控件，控件名称ClearEditText.class，继承RelativeLayout并有布局引用。在拷贝到项目里面后，使用时候只需要与普通输入框控件一样，进行相关的配置即可，部分属性需要使用自定义属性，具体见代码。
二、使用步骤
1.拷贝ClearEditText.class
拷贝ClearEditText.class类到自己的项目里，再考拷贝它相关的布局文件、自定义属性、默认图片即可，下面贴出ClearEditText主要代码：
public class ClearEditText extends RelativeLayout {
private ImageView ivLeftIcon;
private EditText myEdie;
private ImageView ivEditClean;
private ImageView ivEditEye;
private boolean isChecked = true;
private Context mContext;
private TypedArray mTypedArray;
private boolean showClean = true;//清空图标是否显示，true:显示
private boolean showEye = false;//密码可见图标是否显示，true:显示
private int drawableLeft = -1;//是否显示输入框左侧图片
private int drawableEyeOpen = R.drawable.clear_icon_eye_open;//可以看见密码小眼睛样式
private int drawableEyeClose = R.drawable.clear_icon_eye_close;//不可见密码小眼睛样式
private int drawableClean = R.drawable.clear_icon_close;//清除按钮图片
private int cleanPadding = 0;//清除按钮padding边距
private String hintStr;
private String textStr;
private int mTextColorHint = Color.BLACK;
private int mTextColor = Color.BLACK;
private int mTextSize = -1;
private int mMaxLength = 2000;
private int mMaxLines = 1;
private int mInputType = 0;//输入类型，就做了不限制、数字、文本密码三种
private boolean isInput = false;//输入1个字符后更改状态为true,保证小眼睛移动一次
private boolean isHideClean = false;//输入字符后，清除了需要小眼睛归为，清除按钮隐藏
private int ivWidth = 45;//关闭按钮的宽度
public ClearEditText(Context context) {
super(context);
mContext = context;
initView();
}
public ClearEditText(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
mContext = context;
mTypedArray = mContext.obtainStyledAttributes(attrs, R.styleable.myEditText);
initView();
}
public ClearEditText(Context context, AttributeSet attrs) {
super(context, attrs);
mContext = context;
mTypedArray = mContext.obtainStyledAttributes(attrs, R.styleable.myEditText);
showClean = mTypedArray.getBoolean(R.styleable.myEditText_showClean, showClean);
drawableClean = mTypedArray.getResourceId(R.styleable.myEditText_drawableClean, drawableClean);
cleanPadding = mTypedArray.getDimensionPixelSize(R.styleable.myEditText_cleanPadding, cleanPadding);
showEye = mTypedArray.getBoolean(R.styleable.myEditText_showEye, showEye);
drawableLeft = mTypedArray.getResourceId(R.styleable.myEditText_drawableLeft, -1);
drawableEyeClose = mTypedArray.getResourceId(R.styleable.myEditText_drawableEyeClose, drawableEyeClose);
drawableEyeOpen = mTypedArray.getResourceId(R.styleable.myEditText_drawableEyeOpen, drawableEyeOpen);
hintStr = mTypedArray.getString(R.styleable.myEditText_hint);
textStr = mTypedArray.getString(R.styleable.myEditText_text);
mTextColorHint = mTypedArray.getColor(R.styleable.myEditText_textColorHint, mTextColorHint);
mTextColor = mTypedArray.getColor(R.styleable.myEditText_textColor, mTextColor);
mTextSize = mTypedArray.getDimensionPixelSize(R.styleable.myEditText_textSize, mTextSize);
mMaxLength = mTypedArray.getInteger(R.styleable.myEditText_maxLength, mMaxLength);
mMaxLines = mTypedArray.getDimensionPixelSize(R.styleable.myEditText_maxLines, mMaxLines);
mInputType = mTypedArray.getInteger(R.styleable.myEditText_inputType, mInputType);
mTypedArray.recycle();
initView();
}
// 初始化视图
private void initView() {
View view = View.inflate(getContext(), R.layout.clear_layout_view, null);
ivLeftIcon = (ImageView) view.findViewById(R.id.iv_edit_left_icon);
myEdie = (EditText) view.findViewById(R.id.view_edit_show);
ivEditClean = (ImageView) view.findViewById(R.id.iv_edit_clean);
ivEditEye = (ImageView) view.findViewById(R.id.iv_edit_eye);
myEdie.setHint(hintStr);
myEdie.setHintTextColor(mTextColorHint);
myEdie.setText(textStr);
myEdie.setTextColor(mTextColor);
myEdie.setMaxLines(mMaxLines);
myEdie.setFilters(new InputFilter[]{new InputFilter.LengthFilter(mMaxLength)});
if (mTextSize != -1) {
myEdie.setTextSize(TypedValue.COMPLEX_UNIT_PX, mTextSize);
} else {
myEdie.setTextSize(15);
}
if (mInputType == 1) {
myEdie.setInputType(InputType.TYPE_CLASS_NUMBER);
} else if (mInputType == 2) {
myEdie.setInputType(InputType.TYPE_TEXT_VARIATION_PASSWORD | InputType.TYPE_CLASS_TEXT);
} else {
myEdie.setInputType(InputType.TYPE_NUMBER_VARIATION_NORMAL | InputType.TYPE_CLASS_TEXT);
}
if (showEye) {
myEdie.setTransformationMethod(new AsteriskPasswordTransformationMethod());
}
if (showClean && showEye) {
int left = myEdie.getPaddingLeft();
int top = myEdie.getPaddingTop();
int bottom = myEdie.getPaddingBottom();
myEdie.setPadding(left, top, Utils.dp2px(mContext, 90), bottom);
} else if (!showClean && !showEye) {
int left = myEdie.getPaddingLeft();
int top = myEdie.getPaddingTop();
int right = myEdie.getPaddingRight();
int bottom = myEdie.getPaddingBottom();
myEdie.setPadding(left, top, right, bottom);
} else {
int left = myEdie.getPaddingLeft();
int top = myEdie.getPaddingTop();
int bottom = myEdie.getPaddingBottom();
myEdie.setPadding(left, top, Utils.dp2px(mContext, 45), bottom);
}
myEdie.addTextChangedListener(new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
if (s.length() > 0) {
isHideClean = false;
}
}
@Override
public void afterTextChanged(Editable s) {
if (s.length() > 0 && !isInput) {//输入字符大于0且只有一个字符时候显示清除按钮动画，小眼睛移动出位置给清除按钮使用
showEditClean();
moveEditEye();
isInput = true;
} else if (s.length() == 0) {//无字符小眼睛归位
UndoEditEye();
}
if (s.length() == 0 & !isHideClean) {
hideEditClean();
isHideClean = true;
isInput = false;
}
if (onEditInputListener != null) {
onEditInputListener.input(getText());
}
}
});
setEditClean(showClean);
ivEditClean.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
myEdie.setText("");
}
});
ivEditClean.setImageResource(drawableClean);
ivEditClean.setPadding(cleanPadding, cleanPadding, cleanPadding, cleanPadding);
setEditEye(showEye);
ivEditEye.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
if (isChecked) {
// 输入一个对用户可见的密码
myEdie.setTransformationMethod(HideReturnsTransformationMethod.getInstance());
myEdie.setSelection(getText().length());
ivEditEye.setImageResource(drawableEyeOpen);
isChecked = false;
} else {
// 输入一个对用户不可见的密码
myEdie.setTransformationMethod(new AsteriskPasswordTransformationMethod());
myEdie.setSelection(getText().length());
ivEditEye.setImageResource(drawableEyeClose);
isChecked = true;
}
}
});
if (drawableLeft != -1) {
ivLeftIcon.setVisibility(View.VISIBLE);
ivLeftIcon.setImageResource(drawableLeft);
} else {
ivLeftIcon.setVisibility(View.GONE);
}
view.setLayoutParams(new LayoutParams(ViewPager.LayoutParams.MATCH_PARENT, ViewPager.LayoutParams.WRAP_CONTENT));
addView(view);
}
//密码不可见时候，使用*替换密码
public class AsteriskPasswordTransformationMethod extends PasswordTransformationMethod {
@Override
public CharSequence getTransformation(CharSequence source, View view) {
return new PasswordCharSequence(source);
}
private class PasswordCharSequence implements CharSequence {
private CharSequence mSource;
public PasswordCharSequence(CharSequence source) {
mSource = source; // Store char sequence
}
public char charAt(int index) {
return '*'; // This is the important part
}
public int length() {
return mSource.length(); // Return default
}
public CharSequence subSequence(int start, int end) {
return mSource.subSequence(start, end); // Return default
}
}
}
public String getText() {
return myEdie.getText().toString().trim();
}
public void setText(String text) {
myEdie.setText(text);
}
//代码设置是否显示清除按钮
public void setEditClean(boolean isCanClose) {
showClean = isCanClose;
}
//代码设置是否显示小眼睛
public void setEditEye(boolean isCanSee) {
showEye = isCanSee;
if (showEye == true) {
ivEditEye.setVisibility(View.VISIBLE);
} else {
ivEditEye.setVisibility(View.GONE);
}
}
private void showEditClean() {
if (showClean == true) {
AnimationUtils.showAndHiddenCenterAnimation(ivEditClean, AnimationUtils.AnimationState.STATE_SHOW, 500);
}
}
private void hideEditClean() {
if (showClean == true) {
AnimationUtils.showAndHiddenCenterAnimation(ivEditClean, AnimationUtils.AnimationState.STATE_HIDDEN, 500);
}
}
private void moveEditEye() {
if (showEye) {
ObjectAnimator.ofFloat(ivEditEye, "translationX", -Utils.dp2px(mContext, ivWidth)).setDuration(500).start();
}
}
private void UndoEditEye() {
if (showEye) {
ObjectAnimator.ofFloat(ivEditEye, "translationX", 0).setDuration(500).start();
}
}
public OnEditInputListener onEditInputListener;
public void setOnEditInputListener(OnEditInputListener listener) {
onEditInputListener = listener;
}
//输入监听
public interface OnEditInputListener {
void input(String content);
}
}2.使用示例
下面是在xml布局时候，如何使用ClearEditText的示例，部分自定义属性使用xmlns:app="http://schemas.android.com/apk/res-auto"引用调用。app:showEye属性true-显示小眼睛，false-关闭小眼睛。
上述就是小编为大家分享的怎么在Android中实现一个带清除按钮、密码可见的输入框了，如果刚好有类似的疑惑，不妨参照上述分析进行理解。如果想知道更多相关知识，欢迎关注创新互联行业资讯频道。
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