Android - 如何从我的拼写检查服务获取会话?

时间:2016-09-05 11:17:46

标签: android android-service android-service-binding android-spellcheck

我正在尝试实施一个名为SampleSpellCheckerService的拼写检查服务as described here,但似乎教程不完整,其源代码似乎不可用。

我正在努力解决如何通过我的活动的setSuggestionsFor()方法从我的拼写检查服务中获取会话,如下所示:

public class SpellCheckerSettingsActivity extends AppCompatActivity implements SpellCheckerSession.SpellCheckerSessionListener {

    private static final String LOG_TAG = SpellCheckerSettingsActivity.class.getSimpleName();

    private TextView textView = null;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_spell_checker_settings);

        final EditText editText = (EditText)findViewById(R.id.editText);

        textView = (TextView)findViewById(R.id.textView);

        Button button = (Button)findViewById(R.id.button);
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                fetchSuggestionsFor(editText.getText().toString());
            }
        });

        startService(new Intent(this, SampleSpellCheckerService.class));

    }

    private void fetchSuggestionsFor(String input){

        Log.d(LOG_TAG, "fetchSuggestionsFor(\"" + input + "\")");

        /***************************************************
         * 
         * This line is invalid. What do I replace it with?
         * 
         ***************************************************/
        SpellCheckerSession session = SampleSpellCheckerService.getSession();

        TextInfo[] textInfos = new TextInfo[]{ new TextInfo(input) };
        int suggestionsLimit = 5;
        session.getSentenceSuggestions(textInfos, suggestionsLimit);

    }

    @Override
    public void onGetSuggestions(SuggestionsInfo[] results) {

        Log.d(LOG_TAG, "onGetSuggestions(" + results + ")");

        runOnUiThread(new Runnable() {
            @Override
            public void run() {
                textView.setText("Suggestions obtained (TODO - get from results[])");
            }
        });

    }

    @Override
    public void onGetSentenceSuggestions(SentenceSuggestionsInfo[] results) {

        Log.d(LOG_TAG, "onGetSentenceSuggestions(" + results + ")");

        if (results != null) {
            final StringBuffer sb = new StringBuffer("");
            for (SentenceSuggestionsInfo result : results) {
                int n = result.getSuggestionsCount();
                for (int i = 0; i < n; i++) {
                    int m = result.getSuggestionsInfoAt(i).getSuggestionsCount();

                    for (int k = 0; k < m; k++) {
                        sb.append(result.getSuggestionsInfoAt(i).getSuggestionAt(k))
                                .append("\n");
                    }
                    sb.append("\n");
                }
            }

            runOnUiThread(new Runnable() {
                @Override
                public void run() {
                    textView.setText(sb.toString());
                }
            });
        }

    }

    @Override
    public void onDestroy() {
        stopService(new Intent(this, SampleSpellCheckerService.class));
        super.onDestroy();
    }
}

那么从SampleSpellCheckerService获取会话的正确方法是什么?

为了完整性,这是我的拼写检查服务类:

public class SampleSpellCheckerService extends SpellCheckerService {

    public static final String LOG_TAG = SampleSpellCheckerService.class.getSimpleName();

    public SampleSpellCheckerService() {
        Log.d(LOG_TAG, "SampleSpellCheckerService");
    }

    @Override
    public void onCreate() {
        super.onCreate();

        Log.d(LOG_TAG, "SampleSpellCheckerService.onCreate");
    }

    @Override
    public Session createSession() {

        Log.d(LOG_TAG, "createSession");

        return new AndroidSpellCheckerSession();
    }

    private static class AndroidSpellCheckerSession extends SpellCheckerService.Session {

        @Override
        public void onCreate() {

            Log.d(LOG_TAG, "AndroidSpellCheckerSession.onCreate");

        }



        @Override
        public SentenceSuggestionsInfo[] onGetSentenceSuggestionsMultiple(TextInfo[] textInfos, int suggestionsLimit) {

            Log.d(LOG_TAG, "onGetSentenceSuggestionsMultiple");

            SentenceSuggestionsInfo[] suggestionsInfos = null;
            //suggestionsInfo = new SuggestionsInfo();
            //... // look up suggestions for TextInfo
            return suggestionsInfos;
        }

        @Override
        public SuggestionsInfo onGetSuggestions(TextInfo textInfo, int suggestionsLimit) {

            Log.d(LOG_TAG, "onGetSuggestions");

            SuggestionsInfo suggestionsInfo = null;
            //suggestionsInfo = new SuggestionsInfo();
            //... // look up suggestions for TextInfo
            return suggestionsInfo;
        }

        @Override
        public void onCancel() {
            Log.d(LOG_TAG, "onCancel");
        }


    }
}

这是我的清单:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example">

    <permission android:name="android.permission.BIND_TEXT_SERVICE" />

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">

        <service
            android:name="com.example.SampleSpellCheckerService"
            android:label="@string/app_name"
            android:enabled="true"
            android:permission="android.permission.BIND_TEXT_SERVICE">
            <intent-filter>
                <action android:name="android.service.textservice.SpellCheckerService" />
            </intent-filter>

            <meta-data
                android:name="android.view.textservice.scs"
                android:resource="@xml/spellchecker" />
        </service>

        <activity android:name="com.example.SpellCheckerSettingsActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

这是我的spellchecker.xml:

<?xml version="1.0" encoding="utf-8"?>
<spell-checker
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:label="@string/spellchecker_name"
    android:settingsActivity="com.example.SpellCheckerSettingsActivity">
    <subtype
        android:label="@string/subtype_generic"
        android:subtypeLocale="en" />
    />
    <subtype
        android:label="@string/subtype_generic"
        android:subtypeLocale="en_GB" />
    />
</spell-checker>

注意 - 我正在使用三星设备进行测试。

1 个答案:

答案 0 :(得分:0)

据我所知,从文档和一些示例代码中,似乎存在一些对Android拼写检查API的误解,导致您的错误。

据我所知,您不能直接调用您的服务,因为API目标是您定义一个拼写检查器,用户必须首先从系统设置中选择。基本上,您将设置活动(针对服务相关设置显示)与服务的测试活动混合在一起。

android dev bloghere中编写了一些更好的教程,可以在github上的镜像android示例之间找到testing clientrudimentary example service的示例代码。

到目前为止,您所获得的是示例服务(尽管链接的示例提供了更多代码以了解如何实现这些方法),您可以使用区域设置定义所需的spellchecker.xml以及出现在设置中的拼写检查器名称,您已经有一个设置活动(在spellchecker.xml中定义,但只要您不需要任何首选项就不需要)并且您有一个实现SpellCheckerSessionListener的活动(尽管您将其命名为设置活动)

您还需要做的是转到settings - &gt; Language & keyboard - &gt;激活Spell checker并选择您的拼写检查程序。

要从该拼写检查程序获取会话,您可以使用

调用API
        final TextServicesManager tsm = (TextServicesManager) getSystemService(
            Context.TEXT_SERVICES_MANAGER_SERVICE);
    mScs = tsm.newSpellCheckerSession(null, null, this, true);

如样本中所示。

编辑: 如果您不需要任何服务设置,可以从xml中删除xml属性:

 android:settingsActivity="com.example.SpellCheckerSettingsActivity"