| /* |
| * Copyright (C) 2006 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package android.text; |
| |
| /** |
| * When an object of a type is attached to an Editable, its methods will |
| * be called when the text is changed. |
| */ |
| public interface TextWatcher extends NoCopySpan { |
| /** |
| * This method is called to notify you that, within <code>s</code>, |
| * the <code>count</code> characters beginning at <code>start</code> |
| * are about to be replaced by new text with length <code>after</code>. |
| * It is an error to attempt to make changes to <code>s</code> from |
| * this callback. |
| */ |
| public void beforeTextChanged(CharSequence s, int start, |
| int count, int after); |
| /** |
| * This method is called to notify you that, within <code>s</code>, |
| * the <code>count</code> characters beginning at <code>start</code> |
| * have just replaced old text that had length <code>before</code>. |
| * It is an error to attempt to make changes to <code>s</code> from |
| * this callback. |
| */ |
| public void onTextChanged(CharSequence s, int start, int before, int count); |
| |
| /** |
| * This method is called to notify you that, somewhere within |
| * <code>s</code>, the text has been changed. |
| * It is legitimate to make further changes to <code>s</code> from |
| * this callback, but be careful not to get yourself into an infinite |
| * loop, because any changes you make will cause this method to be |
| * called again recursively. |
| * (You are not told where the change took place because other |
| * afterTextChanged() methods may already have made other changes |
| * and invalidated the offsets. But if you need to know here, |
| * you can use {@link Spannable#setSpan} in {@link #onTextChanged} |
| * to mark your place and then look up from here where the span |
| * ended up. |
| */ |
| public void afterTextChanged(Editable s); |
| } |