Android Editable

简单记一下，以前没怎么用过。

EditText View的getText直接返回的就是 Editable

而 TextView则是getEditableText才返回 Editable。

还有就是注释所说,

* Replaces the specified range (st…en) of text in this
* Editable with a copy of the slice start…end from
* source.  The destination slice may be empty, in which case
* the operation is an insertion, or the source slice may be empty,
* in which case the operation is a deletion.

replace 在 没有选中内容时 表现为 insert操作,

replace/insert 的String 参数 不能为空.

android.text
接口 Editable

所有超级接口：

Appendable, CharSequence, GetChars, Spannable, Spanned

所有已知实现类：

SpannableStringBuilder

---

public interface Editable

extends CharSequence, GetChars, Spannable, Appendable

This is the interface for text whose content and markup can be changed (as opposed to immutable text like Strings). If you make a DynamicLayout of an Editable, the layout will be reflowed as the text is changed.

---

嵌套类摘要
static class	Editable.Factory           Factory used by TextView to create new Editables.

字段摘要

从接口 android.text.Spanned 继承的字段

SPAN_COMPOSING, SPAN_EXCLUSIVE_EXCLUSIVE, SPAN_EXCLUSIVE_INCLUSIVE, SPAN_INCLUSIVE_EXCLUSIVE, SPAN_INCLUSIVE_INCLUSIVE, SPAN_INTERMEDIATE, SPAN_MARK_MARK, SPAN_MARK_POINT, SPAN_PARAGRAPH, SPAN_POINT_MARK, SPAN_POINT_MARK_MASK, SPAN_POINT_POINT, SPAN_PRIORITY, SPAN_PRIORITY_SHIFT, SPAN_USER, SPAN_USER_SHIFT

方法摘要
Editable	append(char text)           Convenience for append(String.valueOf(text)).
Editable	append(CharSequence text)           Convenience for replace(length(), length(), text, 0, text.length())
Editable	append(CharSequence text, int start, int end)           Convenience for replace(length(), length(), text, start, end)
void	clear()           Convenience for replace(0, length(), “”, 0, 0)
void	clearSpans()           Removes all spans from the Editable, as if by calling Spannable.removeSpan(java.lang.Object) on each of them.
Editable	delete(int st, int en)           Convenience for replace(st, en, “”, 0, 0)
InputFilter[]	getFilters()           Returns the array of input filters that are currently applied to changes to this Editable.
Editable	insert(int where, CharSequence text)           Convenience for replace(where, where, text, 0, text.length());
Editable	insert(int where, CharSequence text, int start, int end)           Convenience for replace(where, where, text, start, end)
Editable	replace(int st, int en, CharSequence text)           Convenience for replace(st, en, text, 0, text.length())
Editable	replace(int st, int en, CharSequence source, int start, int end)           Replaces the specified range (st…en) of text in this Editable with a copy of the slice start…end from source.
void	setFilters(InputFilter[] filters)           Sets the series of filters that will be called in succession whenever the text of this Editable is changed, each of which has the opportunity to limit or transform the text that is being inserted.

从接口 android.text.GetChars 继承的方法

getChars

从接口 android.text.Spannable 继承的方法

removeSpan, setSpan

从接口 android.text.Spanned 继承的方法

getSpanEnd, getSpanFlags, getSpans, getSpanStart, nextSpanTransition

从接口 java.lang.CharSequence 继承的方法

charAt, length, subSequence, toString

方法详细信息

replace

Editable replace(int st,
int en,
CharSequence source,
int start,
int end)

Replaces the specified range (
st…en) of text in this Editable with a copy of the slice

start…end from

source. The destination slice may be empty, in which case the operation is an insertion, or the source slice may be empty, in which case the operation is a deletion.

Before the change is committed, each filter that was set with setFilters(android.text.InputFilter[]) is given the opportunity to modify the source text.

If source is Spanned, the spans from it are preserved into the Editable. Existing spans within the Editable that entirely cover the replaced range are retained, but any that were strictly within the range that was replaced are removed. As a special case, the cursor position is preserved even when the entire range where it is located is replaced.

返回：

a reference to this object.

---

replace

Editable replace(int st,
int en,
CharSequence text)

另请参见：

replace(int, int, CharSequence, int, int)

---

insert

Editable insert(int where,
CharSequence text,
int start,
int end)

另请参见：

replace(int, int, CharSequence, int, int)

---

insert

Editable insert(int where,
CharSequence text)

另请参见：

replace(int, int, CharSequence, int, int)

---

delete

Editable delete(int st,
int en)

另请参见：

replace(int, int, CharSequence, int, int)

---

append

Editable append(CharSequence text)

指定者：

接口
Appendable 中的

append

参数：

text – the character sequence to append.

返回：

this
Appendable.

另请参见：

replace(int, int, CharSequence, int, int)

---

append

Editable append(CharSequence text,
int start,
int end)

指定者：

接口
Appendable 中的

append

参数：

text – the character sequence to append.

start – the first index of the subsequence of

csq that is appended.

end – the last index of the subsequence of

csq that is appended.

返回：

this
Appendable.

另请参见：

replace(int, int, CharSequence, int, int)

---

append

Editable append(char text)

指定者：

接口
Appendable 中的

append

参数：

text – the character to append.

返回：

this
Appendable.

另请参见：

replace(int, int, CharSequence, int, int)

---

clear

void clear()

另请参见：

Note that this clears the text, not the spans; use {@link #clearSpans} if you need that.

---

clearSpans

void clearSpans()

---

setFilters

void setFilters(InputFilter[] filters)

---

getFilters

InputFilter[] getFilters()

Returns the array of input filters that are currently appliedto changes to this Editable.

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