The file containing the source code shown below is located in the corresponding directory in <sdk>/samples/android-<version>/...
/*
* Copyright (C) 2011 The Android开源工程
*
* 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 com.example.android.samplespellcheckerservice;
import android.os.Build;
import android.service.textservice.SpellCheckerService;
import android.util.Log;
import android.view.textservice.SentenceSuggestionsInfo;
import android.view.textservice.SuggestionsInfo;
import android.view.textservice.TextInfo;
import java.util.ArrayList;
public class SampleSpellCheckerService extends SpellCheckerService {
private static final String TAG = SampleSpellCheckerService.class.getSimpleName();
private static final boolean DBG = true;
@Override
public Session createSession() {
return new AndroidSpellCheckerSession();
}
private static class AndroidSpellCheckerSession extends Session {
private boolean isSentenceSpellCheckApiSupported() {
// Note that the sentence level spell check APIs work on Jelly Bean or later.
return Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN;
}
private String mLocale;
@Override
public void onCreate() {
mLocale = getLocale();
}
/**
* This method should have a concrete implementation in all spell checker services.
* Please note that the default implementation of
* {@link SpellCheckerService.Session#onGetSuggestionsMultiple(TextInfo[], int, boolean)}
* calls up this method. You may want to override
* {@link SpellCheckerService.Session#onGetSuggestionsMultiple(TextInfo[], int, boolean)}
* by your own implementation if you'd like to provide an optimized implementation for
* {@link SpellCheckerService.Session#onGetSuggestionsMultiple(TextInfo[], int, boolean)}.
*/
@Override
public SuggestionsInfo onGetSuggestions(TextInfo textInfo, int suggestionsLimit) {
if (DBG) {
Log.d(TAG, "onGetSuggestions: " + textInfo.getText());
}
final String input = textInfo.getText();
final int length = input.length();
// Just a fake logic:
// length <= 3 for short words that we assume are in the fake dictionary
// length > 20 for too long words that we assume can't be recognized (such as CJK words)
final int flags = length <= 3 ? SuggestionsInfo.RESULT_ATTR_IN_THE_DICTIONARY
: length <= 20 ? SuggestionsInfo.RESULT_ATTR_LOOKS_LIKE_TYPO : 0;
return new SuggestionsInfo(flags,
new String[] {"aaa", "bbb", "Candidate for " + input, mLocale});
}
/**
* Please consider providing your own implementation of sentence level spell checking.
* Please note that this sample implementation is just a mock to demonstrate how a sentence
* level spell checker returns the result.
* If you don't override this method, the framework converts queries of
* {@link SpellCheckerService.Session#onGetSentenceSuggestionsMultiple(TextInfo[], int)}
* to queries of
* {@link SpellCheckerService.Session#onGetSuggestionsMultiple(TextInfo[], int, boolean)}
* by the default implementation.
*/
@Override
public SentenceSuggestionsInfo[] onGetSentenceSuggestionsMultiple(
TextInfo[] textInfos, int suggestionsLimit) {
if (!isSentenceSpellCheckApiSupported()) {
Log.e(TAG, "Sentence spell check is not supported on this platform, "
+ "but accidentially called.");
return null;
}
final ArrayList<SentenceSuggestionsInfo> retval =
new ArrayList<SentenceSuggestionsInfo>();
for (int i = 0; i < textInfos.length; ++i) {
final TextInfo ti = textInfos[i];
if (DBG) {
Log.d(TAG, "onGetSentenceSuggestionsMultiple: " + ti.getText());
}
final String input = ti.getText();
final int length = input.length();
final SuggestionsInfo[] sis;
final int[] lengths;
final int[] offsets;
if (input.equalsIgnoreCase("I wold like to here form you")) {
// Return sentence level suggestion for this fixed input
final int flags0 = SuggestionsInfo.RESULT_ATTR_LOOKS_LIKE_TYPO;
final int flags1 = SuggestionsInfo.RESULT_ATTR_HAS_RECOMMENDED_SUGGESTIONS
| SuggestionsInfo.RESULT_ATTR_LOOKS_LIKE_TYPO;
final int flags2 = flags1;
final SuggestionsInfo si0 = new SuggestionsInfo(
flags0, new String[] { "would" });
final SuggestionsInfo si1 = new SuggestionsInfo(
flags1, new String[] { "hear" });
final SuggestionsInfo si2 = new SuggestionsInfo(
flags2, new String[] { "from" });
sis = new SuggestionsInfo[] {si0, si1, si2};
offsets = new int[] { 2, 15, 20 };
lengths = new int[] { 4, 4, 4 };
} else {
// Just a mock logic:
// length <= 3 for short words that we assume are in the fake dictionary
// length > 20 for too long words that we assume can't be recognized
// (such as CJK words)
final int flags = length <= 3 ? SuggestionsInfo.RESULT_ATTR_IN_THE_DICTIONARY
: length <= 20 ? SuggestionsInfo.RESULT_ATTR_LOOKS_LIKE_TYPO : 0;
final SuggestionsInfo si = new SuggestionsInfo(flags,
new String[] {"aaa", "bbb", "Candidate for " + input, mLocale});
sis = new SuggestionsInfo[] { si };
offsets = new int[] { 0 };
lengths = new int[] { ti.getText().length() };
}
final SentenceSuggestionsInfo ssi =
new SentenceSuggestionsInfo(sis, lengths, offsets);
retval.add(ssi);
}
return retval.toArray(new SentenceSuggestionsInfo[0]);
}
}
}