在Searchable Activity中都没有调用handleIntent和onCreate

Question

我知道这里有很多这样的问题，我看了很多这样的问题，比如this one以及它引用的所有问题，但我仍然没有解决方法。问题是我已经按照Android开发人员指南使用搜索小部件，但是当我打开我的应用程序并点击搜索小部件时，onNewIntent方法永远不会被调用。我将一个Log.e放入handleIntent方法，这样我就可以检查是否所有内容都已连接，然后再转到函数的下一部分，但它永远不会被调用。我认为问题可能出现在onCreateOptionsMenu的MainActivity中，如果可能我没有在那里调用一些东西。这是我第一次尝试这样做，我真的很感激这个问题上的任何帮助，谢谢。

这是我的SearchableActivity：

package com.gmd.referenceapplication;

import android.app.ListActivity;
import android.app.SearchManager;
import android.content.Context;
import android.content.Intent;
import android.database.Cursor;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.ListView;
import android.widget.Toast;

public class SearchableActivity extends ListActivity {

    DatabaseTable db= new DatabaseTable(this);


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

//        get the intent sent when user searches from search widget, verify the action and extract what is typed in
        Intent intent = getIntent();
        handleIntent(intent);

        }


    public void onNewIntent(Intent intent) {
        setIntent(intent);
        handleIntent(intent);
    }

    private void handleIntent(Intent intent) {

        if (Intent.ACTION_SEARCH.equals(intent.getAction())) {
            String query = intent.getStringExtra(SearchManager.QUERY);
            Cursor c = db.getWordMatches(query, null);
            Log.e("Search Operation", "Database searched");

            System.out.println(R.string.app_name);


            //still need to process Cursor and display results
        }
    }

    public void onListItemClick(ListView l,
                                View v, int position, long id) {
        // call detail activity for clicked entry
    }



    private void doSearch(String queryStr) {
        // get a Cursor, prepare the ListAdapter
        // and set it
    }




}

Android Manifest：

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

    <application
        android:allowBackup="true"
        android:icon="@mipmap/nist_logo"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/Theme.AppCompat.Light.NoActionBar">

        <meta-data
            android:name="android.app.default_searchable"
            android:value="com.example.SearchActivity" />

        <!-- main activity below, will be a home screen -->
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

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

        <!-- //the physical constants overview page, will hopefully split into smaller categories -->
        <activity
            android:name=".FundamentalPhysicalConstants"
            android:label="@string/app_name" />

        <!-- searchable activity, performs searches and presents results -->


        <activity android:name=".SearchableActivity">
            <intent-filter>
                <action android:name="android.intent.action.SEARCH" />
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>

            <meta-data
                android:name="android.app.searchable"
                android:resource="@xml/searchable" />
        </activity>

        <provider
            android:name=".ConstantSuggestionProvider"
            android:authorities="query"
            android:enabled="true"
            android:exported="true" />

        <activity android:name=".ExampleListView" />
        <activity android:name=".CommonConstants" />
        <activity android:name=".ElectromagneticConstants" />
        <activity android:name=".AtomicNuclearConstants" />
        <activity android:name=".PhysicoChemicalConstants" />
        <activity android:name=".ReferenceLinks" />
        <activity android:name=".SIBaseUnits"/>
    </application>

</manifest>

可搜索的xml：

<?xml version="1.0" encoding="utf-8"?>
<searchable xmlns:android="http://schemas.android.com/apk/res/android"
    android:label="@string/app_name"
    android:hint="@string/search_hint">

</searchable>

数据库表：

package com.gmd.referenceapplication;

import android.content.ContentValues;
import android.content.Context;
import android.content.res.Resources;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.database.sqlite.SQLiteQueryBuilder;
import android.text.TextUtils;
import android.util.Log;

import com.gmd.referenceapplication.R;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;

/**
 * Created by gmd on 6/8/2016.
 */
public class DatabaseTable {


    public static final String TAG = "ConstantDatabase";

    //the columns included in the table
    public static final String COL_QUANTITY = "QUANTIY";
    public static final String COL_VALUE = "VALUE";
    public static final String COL_UNCERTAINTY = "UNCERTAINTY";
    public static final String COL_UNIT = "UNIT";

    private static final String DATABASE_NAME = "CONSTANTS";
    private static final String FTS_VIRTUAL_TABLE = "FTS";
    private static final int DATABASE_VERSION = 1;


    private final DatabaseOpenHelper mDatabaseOpenHelper;



    public DatabaseTable(Context context){
        mDatabaseOpenHelper = new DatabaseOpenHelper(context);
    }

    private static class DatabaseOpenHelper extends SQLiteOpenHelper {

        private final Context mHelperContext;
        private SQLiteDatabase mDatabase;

        private static final String FTS_TABLE_CREATE =
                "CREATE VIRTUAL TABLE " + FTS_VIRTUAL_TABLE +
                        " USING fts3 (" +
                        COL_QUANTITY + ", " +
                        COL_VALUE + "," +
                        COL_UNCERTAINTY + "," +
                        COL_UNIT + ")";

        public DatabaseOpenHelper(Context context) {
            super(context, DATABASE_NAME, null, DATABASE_VERSION);
            Log.e("Database Operation", "Database Created / Opened...");
            mHelperContext = context;
        }

        @Override
        public void onCreate(SQLiteDatabase db) {
            mDatabase = db;
            mDatabase.execSQL(FTS_TABLE_CREATE);
            Log.e("Database Operation", "Constants Table Created ...");
            loadConstants();
        }

        @Override
        public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
            Log.w(TAG, "Upgrading database from version " + oldVersion + " to "
                    + newVersion + ", which will destroy all old data");
            db.execSQL("DROP TABLE IF EXISTS " + FTS_VIRTUAL_TABLE);
            onCreate(db);
        }


//        populating the virtual table with a string reading code


        private void loadConstants() {
            new Thread(new Runnable() {
                public void run() {
                    try {
                        loadConstantss();
                    } catch (IOException e) {
                        throw new RuntimeException(e);
                    }
                }
            }).start();

            Log.e("Loading", "Constants Table Populated ...");
        }

        private void loadConstantss() throws IOException {
            final Resources resources = mHelperContext.getResources();
            InputStream inputStream = resources.openRawResource(R.raw.txt);
            BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));

            try {
                String line;
                while ((line = reader.readLine()) != null) {
                    String[] strings = TextUtils.split(line, ",");
                    if (strings.length < 4) continue;
                    long id = addConstant(strings[0].trim(), strings[1].trim(), strings[2].trim(), strings[3].trim());
                    if (id < 0) {
                        Log.e(TAG, "unable to add word: " + strings[0].trim());
                    }
                }
            } finally {
                reader.close();
            }
        }

        public long addConstant(String quantity, String value, String uncertainty, String unit) {
            ContentValues initialValues = new ContentValues();
            initialValues.put(COL_QUANTITY, quantity);
            initialValues.put(COL_VALUE, value);
            initialValues.put(COL_UNCERTAINTY, uncertainty);
            initialValues.put(COL_UNIT, unit);


            return mDatabase.insert(FTS_VIRTUAL_TABLE, null, initialValues);
        }






    }

    public Cursor getWordMatches(String query, String[] columns) {
        String selection = COL_QUANTITY + " MATCH ?";
        String[] selectionArgs = new String[] {query+"*"};

        return query(selection, selectionArgs, columns);
    }

    public Cursor query(String selection, String[] selectionArgs, String[] columns) {
        SQLiteQueryBuilder builder = new SQLiteQueryBuilder();
        builder.setTables(FTS_VIRTUAL_TABLE);

        Cursor cursor = builder.query(mDatabaseOpenHelper.getReadableDatabase(),
                columns, selection, selectionArgs, null, null, null);

        if (cursor == null) {
            return null;
        } else if (!cursor.moveToFirst()) {
            cursor.close();
            return null;
        }
        return cursor;
    }


}

MainActivity：

package com.gmd.referenceapplication;

import android.app.SearchManager;
import android.app.SearchableInfo;
import android.content.Context;
import android.content.Intent;
import android.support.v4.view.MenuItemCompat;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.support.v7.widget.SearchView.OnQueryTextListener;
import android.support.v7.widget.SearchView;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.support.v7.widget.SearchView;

public class MainActivity extends AppCompatActivity {
    DatabaseTable dbHelper = new DatabaseTable(this);
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Toolbar myToolbar = (Toolbar) findViewById(R.id.my_toolbar);
        setSupportActionBar(myToolbar);











    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        MenuInflater inflater = getMenuInflater();
        inflater.inflate(R.menu.overflow, menu);


        SearchView searchView = (SearchView) menu.findItem(R.id.search).getActionView();
        searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
            @Override
            public boolean onQueryTextSubmit(String query) {
                //search button is pressed
                dbHelper.getWordMatches(query,null);
                return true;
            }

            @Override
            public boolean onQueryTextChange(String newText) {
                // User changed the text
                return true;
            }
        });

        SearchManager searchManager =
                (SearchManager) getSystemService(Context.SEARCH_SERVICE);
        searchView =
                (SearchView) menu.findItem(R.id.search).getActionView();
        searchView.setSearchableInfo(
                searchManager.getSearchableInfo(getComponentName()));

        return true;

    }





    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
            case R.id.constants:
                startActivity(new Intent(MainActivity.this, FundamentalPhysicalConstants.class));
                return true;

            case R.id.joes_rules:
                //go to rules
                //startActivity(new Intent(MainActivity.this, ExampleListView.class));
                return true;

            case R.id.home:
                //Go back to the home screen
                return true;

            case R.id.search:
                //open search
                return true;

            case R.id.links:
                //go to referencelinks
                startActivity(new Intent(this, ReferenceLinks.class));
                return true;

            case R.id.base_units:
                //go to baseunits
                startActivity(new Intent(this, SIBaseUnits.class));
                return true;


            default:
                // If we got here, the user's action was not recognized.
                // Invoke the superclass to handle it.
                return super.onOptionsItemSelected(item);

        }
    }
}