我想将图像插入editText，我的代码是：
CharSequence charSeq= editText.getText()+" ";
SpannableString ss2 = new SpannableString(charSeq);
Drawable d2 = holder.image.getDrawable();
d2.setBounds(0, 0, d2.getIntrinsicWidth(), d2.getIntrinsicHeight());
ImageSpan span2 = new ImageSpan(d2, ImageSpan.ALIGN_BASELINE);
ss2.setSpan(span2,charSeq.length()-1, charSeq.length(),
Spannable.SPAN_INCLUSIVE_INCLUSIVE);
editText.setText(ss2,BufferType.SPANNABLE);
我的代码可以运行，但我有一些不错的经验，我想修改：
1：你知道什么时候使用ss2.setSpan（）方法，图像可以替换字符，我只想插入新图像，不要想图像替换字符。
2：你知道我的方法包括“editText.getText（）+”“;”，我添加了一些额外的空格，以便图像可以插入最后的CharSequence。如何不需要添加一些额外的，图像也插入最后的CharSequence。
3.当我将图像插入CharSequence的最后一个时，光标不在最后，它出现在CharSequence的前面。如何将光标放在图像后面。
4.i想在不同的CharSequence中不断插入图像，怎么办？
我的问题很多，我希望你能帮助我，非常感谢你。
答案 0 :(得分：10)
执行类似的操作（注意：您可以重用SpannableStringBuilder）
editText = (EditText)mRoot.findViewById(R.id.content);
ImageSpan imageSpan = new ImageSpan(preview);
SpannableStringBuilder builder = new SpannableStringBuilder();
builder.append(editText.getText());
// this is a string that will let you find a place, where the ImageSpan is.
String imgId = "[img=1]";
int selStart = editText.getSelectionStart();
// current selection is replaceв with imageId
builder.replace(editText.getSelectionStart(), editText.getSelectionEnd(), imgId);
// This adds a span to display image where the imageId is. If you do builder.toString() - the string will contain imageId where the imageSpan is.
// you can use it later - if you want to find location of imageSpan in text;
builder.setSpan(imageSpan, selStart, selStart + imgId.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
editText.setText(builder);
注意：有关处理部分标签删除的信息，请参阅follow up answer
答案 1 :(得分：3)
试试这个，我希望你在寻找这个：
<EditText
android:id="@+id/editText1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:drawableLeft="@drawable/icon">
</EditText>
你可以尝试同样的事情：
android:drawableRight
android:drawableTop
android:drawableBottom
android:drawablePadding
答案 2 :(得分：2)
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import android.content.Context;
import android.text.Spannable;
import android.text.style.ImageSpan;
import android.util.AttributeSet;
import android.util.Log;
import android.widget.TextView;
public class TextViewWithImages extends TextView {
public TextViewWithImages(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
public TextViewWithImages(Context context, AttributeSet attrs) {
super(context, attrs);
}
public TextViewWithImages(Context context) {
super(context);
}
@Override
public void setText(CharSequence text, BufferType type) {
Spannable s = getTextWithImages(getContext(), text);
super.setText(s, BufferType.SPANNABLE);
}
private static final Spannable.Factory spannableFactory = Spannable.Factory.getInstance();
private static boolean addImages(Context context, Spannable spannable) {
Pattern refImg = Pattern.compile("\\Q[img src=\\E([a-zA-Z0-9_]+?)\\Q/]\\E");
boolean hasChanges = false;
Matcher matcher = refImg.matcher(spannable);
while (matcher.find()) {
boolean set = true;
for (ImageSpan span : spannable.getSpans(matcher.start(), matcher.end(), ImageSpan.class)) {
if (spannable.getSpanStart(span) >= matcher.start()
&& spannable.getSpanEnd(span) <= matcher.end()
) {
spannable.removeSpan(span);
} else {
set = false;
break;
}
}
String resname = spannable.subSequence(matcher.start(1), matcher.end(1)).toString().trim();
int id = context.getResources().getIdentifier(resname, "drawable", context.getPackageName());
if (set) {
hasChanges = true;
spannable.setSpan( new ImageSpan(context, id),
matcher.start(),
matcher.end(),
Spannable.SPAN_EXCLUSIVE_EXCLUSIVE
);
}
}
return hasChanges;
}
private static Spannable getTextWithImages(Context context, CharSequence text) {
Spannable spannable = spannableFactory.newSpannable(text);
addImages(context, spannable);
return spannable;
}
}
使用：
res / layout / mylayout.xml 中的：
<com.xyz.customandroid.TextViewWithImages
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#FFFFFF00"
android:text="@string/can_try_again"
android:textSize="12dip"
style=...
/>
：
<string name="can_try_again">Press [img src=ok16/] to accept or [img src=retry16/] to retry</string>
其中 ok16.png 和 retry16.png 位于 res / drawable / 文件夹中
答案 3 :(得分：1)
我想，你还需要一些文本编辑功能：如果删除了一个字符，应删除图像;这个类可以帮助（如果删除了它的char，则删除所有图像文本占位符）
public class ImageSpanTextWatcher implements TextWatcher {
Object[] mTouchedSpans;
int[] mSpanLength;
boolean replacing = false;
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
if (s instanceof SpannableStringBuilder) {
SpannableStringBuilder ssb = (SpannableStringBuilder) s;
mTouchedSpans = ssb.getSpans(start, start + count, ImageSpan.class);
if (mTouchedSpans != null && mTouchedSpans.length > 0) {
mSpanLength = new int[mTouchedSpans.length];
for (int i = 0; i < mTouchedSpans.length; i++) {
mSpanLength[i] = ssb.getSpanEnd(mTouchedSpans[i]) - ssb.getSpanStart(mTouchedSpans[i]);
}
}
}
}
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
if (s instanceof SpannableStringBuilder) {
SpannableStringBuilder ssb = (SpannableStringBuilder) s;
if (replacing)
return;
replacing = true;
if (mTouchedSpans != null && mTouchedSpans.length > 0)
for (int i = 0; i < mTouchedSpans.length; i++) {
int newLen = ssb.getSpanEnd(mTouchedSpans[i]) - ssb.getSpanStart(mTouchedSpans[i]);
if (newLen < mSpanLength[i]) {
ssb.replace(ssb.getSpanStart(mTouchedSpans[i]), ssb.getSpanEnd(mTouchedSpans[i]), "");
}
}
mTouchedSpans = null;
mSpanLength = null;
replacing = false;
}
}
@Override
public void afterTextChanged(Editable s) {}
}
答案 4 :(得分：1)
我是通过这种方式在EditText中插入和删除图像：
客户按钮插入：
private void addImageInEditText(Drawable drawable) {
drawable.setBounds(0, 0, drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight());
int selectionCursorPos = messageEditText.getSelectionStart();
messageEditText.getText().insert(selectionCursorPos, ".");
selectionCursorPos = messageEditText.getSelectionStart();
SpannableStringBuilder builder = new SpannableStringBuilder(messageEditText.getText());
int startPos = selectionCursorPos - ".".length();
builder.setSpan(new ImageSpan(drawable), startPos, selectionCursorPos, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
messageEditText.setText(builder);
messageEditText.setSelection(selectionCursorPos);
}
自定义按钮删除：
private void deleteImageFromEditText() {
String msgEditText = messageEditText.getText().toString();
LOGE(TAG, "text length : " + msgEditText.length());
if (msgEditText.length() > 0) {
int selectionCursorPos = messageEditText.getSelectionStart();
int endPosition = messageEditText.getText().length();
LOGE(TAG, "cursor Pos: " + selectionCursorPos + " endPosition : " + endPosition);
if (selectionCursorPos > 0) {
int deletingObjectStartPos = selectionCursorPos - 1;
messageEditText.getText().delete(deletingObjectStartPos, selectionCursorPos);
messageEditText.setSelection(deletingObjectStartPos);
}
} else {
messageEditText.setText("");
}
}
Drawable可以通过多种方式进行测试我这样做：
Drawable drawable = getResources().getDrawable(R.drawable.ic_action_filter);
addImageBetweentext(drawable);
答案 5 :(得分：-1)
通过这个，您可以使图像左对齐，也可以在图像后获得光标。尝试使用：
mEditText.setCompoundDrawablesWithIntrinsicBounds(R.drawable.icon,0, 0,0);