为什么我的listView没有出现..我的编码出了什么问题？ listView据说显示了我数据库中的数据..这是我的编码......它没有显示任何错误。所以我不知道错误在哪里。
Faculty.java
package com.example.prototype;
import android.app.Activity;
import android.app.SearchManager;
import android.content.Intent;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.support.v4.widget.SimpleCursorAdapter;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.EditText;
import android.widget.ListView;
public class Faculty extends Activity {
// Search EditText
EditText inputSearch;
// List view
private ListView myListView;
private DatabaseAdapter DbAdapter;
/* // Listview Adapter
ArrayAdapter<String> adapter;
// ArrayList for Listview
ArrayList<HashMap<String, String>> productList;
protected SQLiteDatabase db;*/
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.qs_faculty);
inputSearch = (EditText) findViewById(R.id.inputSearch);
myListView = (ListView) findViewById(R.id.list_view);
handleIntent(getIntent());
DbAdapter = new DatabaseAdapter(this);
DbAdapter.open();
//Clean all Customers
DbAdapter.deleteAllCustomers();
//Add some Customer data as a sample
DbAdapter.createLocation("PIZZA1", "Pizza Hut", "1107 West Adams Boulevard", "", "Los Angeles", "CA", "90007", null, null);
DbAdapter.createLocation("PIZZA2", "Pizza Hut", "1562 West Pico Boulevard", "", "Los Angeles", "CA", "90015", null, null);
DbAdapter.createLocation("PIZZA3", "Pizza Hut", "718 South Los Angeles Street", "", "Los Angeles", "CA", "90014", null, null);
DbAdapter.createLocation("PIZZA4", "Pizza Hut", "2542 West Temple Street", "", "Los Angeles", "CA", "90026", null, null);
DbAdapter.createLocation("PIZZA5", "Pizza Hut", "4329 North Figueroa Street", "", "Los Angeles", "CA", "90065", null, null);
DbAdapter.createLocation("PIZZA6", "Pizza Hut", "4351 South Central Avenue", "", "Los Angeles", "CA", "90011", null, null);
DbAdapter.createLocation("SUB1", "Subway", "975 West Jefferson", "", "Los Angeles", "CA", "90007", null, null);
DbAdapter.createLocation("SUB2", "Subway", "2805 South Figueroa Street", "", "Los Angeles", "CA", "90007", null, null);
DbAdapter.createLocation("SUB3", "Subway", "198 South Vermont Avenue", "", "Los Angeles", "CA", "90004", null, null);
DbAdapter.createLocation("SUB4", "Subway", "504 West Olympic Boulevard", "", "Los Angeles", "CA", "90015", null, null);
}
@Override
protected void onNewIntent(Intent intent) {
// Because this activity has set launchMode="singleTop", the system calls this method
// to deliver the intent if this activity is currently the foreground activity when
// invoked again (when the user executes a search from this activity, we don't create
// a new instance of this activity, so the system delivers the search intent here)
handleIntent(intent);
}
private void handleIntent(Intent intent) {
if (Intent.ACTION_VIEW.equals(intent.getAction())) {
// handles a click on a search suggestion; launches activity to show word
Intent wordIntent = new Intent(this, FacultyDetail.class);
wordIntent.setData(intent.getData());
startActivity(wordIntent);
} else if (Intent.ACTION_SEARCH.equals(intent.getAction())) {
// handles a search query
String query = intent.getStringExtra(SearchManager.QUERY);
showResults(query);
}
}
private void showResults(String query) {
Cursor cursor = DbAdapter.searchCustomer((query != null ? query.toString() : "@@@@"));
if (cursor == null) {
// There are no results
inputSearch.setText(getString(R.string.no_results, new Object[] {query}));
} else {
// Display the number of results
int count = cursor.getCount();
String countString = getResources().getQuantityString(R.plurals.search_results,
count, new Object[] {count, query});
inputSearch.setText(countString);
// Specify the columns we want to display in the result
String[] from = new String[] { DatabaseAdapter.KEY_NAME,
DatabaseAdapter.KEY_ALAMAT,
DatabaseAdapter.KEY_NOTEL,
DatabaseAdapter.KEY_FAX,
DatabaseAdapter.KEY_EMAIL,
DatabaseAdapter.KEY_TRANSPORT,
DatabaseAdapter.KEY_LANDMARK,
DatabaseAdapter.KEY_WEBSITE};
// Specify the corresponding layout elements where we want the columns to go
int[] to = new int[] { R.id.faculty_name,
R.id.faculty_alamat,
R.id. faculty_notel,
R.id. faculty_fax,
R.id. faculty_email,
R.id. faculty_transport,
R.id. faculty_landmark,
R.id. faculty_website};
// Create a simple cursor adapter for the definitions and apply them to the ListView
SimpleCursorAdapter words = new SimpleCursorAdapter(this,
R.layout.qs_faculty_detail, cursor, from, to);
myListView.setAdapter(words);
// Define the on-click listener for the list items
myListView.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
// Get the cursor, positioned to the corresponding row in the result set
Cursor cursor = (Cursor) myListView.getItemAtPosition(position);
// Build the Intent used to open WordActivity with a specific word Uri
Intent wordIntent = new Intent(getApplicationContext(), FacultyDetail.class);
wordIntent.putExtra("KEY_ROWID", cursor.getInt(cursor.getColumnIndex("_id")));
/* Uri data = Uri.withAppendedPath(DictionaryProvider.CONTENT_URI,String.valueOf(id));
wordIntent.setData(data);*/
startActivity(wordIntent);
}
});
}
}
}
FacultyDetail.java
package com.example.prototype;
import android.net.Uri;
import android.os.Bundle;
import android.app.Activity;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.view.Menu;
import android.widget.TextView;
public class FacultyDetail extends Activity {
private TextView name;
private TextView alamat;
private TextView notel;
private TextView fax;
private TextView email;
private TextView transport;
private TextView landmark;
private TextView website;
private int placeId;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.qs_faculty_detail);
/*placeId = getIntent().getIntExtra("KEY_ROWID", 0);
SQLiteDatabase db = (new DatabaseHelper(this)).getWritableDatabase();
Cursor cursor = db.rawQuery("SELECT emp._id, emp.firstName, emp.lastName, emp.title, emp.officePhone, emp.cellPhone, emp.email, emp.managerId, mgr.firstName managerFirstName, mgr.lastName managerLastName FROM employee emp LEFT OUTER JOIN employee mgr ON emp.managerId = mgr._id WHERE emp._id = ?",
new String[]{""+ placeId});*/
Uri uri = getIntent().getData();
Cursor cursor = managedQuery(uri, null, null, null, null);
if (cursor.getCount() == 1)
{
cursor.moveToFirst();
name = (TextView) findViewById(R.id.faculty_name);
name.setText(cursor.getString(cursor.getColumnIndex("Name")));
alamat = (TextView) findViewById(R.id.faculty_alamat);
alamat.setText(cursor.getString(cursor.getColumnIndex("title")));
notel = (TextView) findViewById(R.id.faculty_notel);
notel.setText(cursor.getString(cursor.getColumnIndex("No_tel")));
fax = (TextView) findViewById(R.id.faculty_fax);
fax.setText(cursor.getString(cursor.getColumnIndex("Fax")));
email = (TextView) findViewById(R.id.faculty_email);
email.setText(cursor.getString(cursor.getColumnIndex("Email")));
transport = (TextView) findViewById(R.id.faculty_transport);
transport.setText(cursor.getString(cursor.getColumnIndex("Transport")));
landmark = (TextView) findViewById(R.id.faculty_landmark);
landmark.setText(cursor.getString(cursor.getColumnIndex("Landmark")));
website = (TextView) findViewById(R.id.faculty_website);
website.setText(cursor.getString(cursor.getColumnIndex("Website")));
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.faculty_detail, menu);
return true;
}
}
DatabaseAdapter.java
package com.example.prototype;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.util.Log;
public class DatabaseAdapter {
public static final String KEY_ROWID = "_id";
public static final String KEY_NAME = "Name";
public static final String KEY_ALAMAT = "Alamat";
public static final String KEY_NOTEL = "No_tel";
public static final String KEY_FAX = "Fax";
public static final String KEY_EMAIL = "Email";
public static final String KEY_TRANSPORT = "Transport";
public static final String KEY_LANDMARK = "Landmark";
public static final String KEY_WEBSITE = "Website";
public static final String KEY_CATEGORY = "Category";
private static final String TAG = "DatabaseAdapter";
private DatabaseHelper mDbHelper;
private SQLiteDatabase mDb;
private static final String DATABASE_NAME = "AcademicLocation";
private static final String FTS_VIRTUAL_TABLE = "UKM_Location";
private static final int DATABASE_VERSION = 1;
//Create a FTS3 Virtual Table for fast searches
private static final String DATABASE_CREATE =
"CREATE VIRTUAL TABLE " + FTS_VIRTUAL_TABLE + " USING fts3(" +
KEY_NAME + "," +
KEY_ALAMAT + "," +
KEY_NOTEL + "," +
KEY_FAX + "," +
KEY_EMAIL + "," +
KEY_TRANSPORT + "," +
KEY_LANDMARK + "," +
KEY_WEBSITE + "," +
KEY_CATEGORY + "," +
" UNIQUE (" + KEY_NAME + "));";
private final Context mCtx;
private static class DatabaseHelper extends SQLiteOpenHelper {
DatabaseHelper(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
@Override
public void onCreate(SQLiteDatabase db) {
Log.w(TAG, DATABASE_CREATE);
db.execSQL(DATABASE_CREATE);
}
@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);
}
}
public DatabaseAdapter(Context ctx) {
this.mCtx = ctx;
}
public DatabaseAdapter open() throws SQLException {
mDbHelper = new DatabaseHelper(mCtx);
mDb = mDbHelper.getWritableDatabase();
return this;
}
public void close() {
if (mDbHelper != null) {
mDbHelper.close();
}
}
public long createLocation(String name, String alamat, String notel, String fax, String email, String transport, String landmark, String website, String category) {
ContentValues initialValues = new ContentValues();
String searchValue = name + " " +
alamat + " " +
notel + " " +
fax + " " +
email + " " +
transport+ " " +
landmark+ " " +
website+ " " +
category;
initialValues.put(KEY_NAME, name);
initialValues.put(KEY_ALAMAT, alamat);
initialValues.put(KEY_NOTEL, notel);
initialValues.put(KEY_FAX, fax);
initialValues.put(KEY_EMAIL, email);
initialValues.put(KEY_TRANSPORT, transport);
initialValues.put(KEY_LANDMARK, landmark);
initialValues.put(KEY_WEBSITE, website);
initialValues.put(KEY_CATEGORY, category);
return mDb.insert(FTS_VIRTUAL_TABLE, null, initialValues);
}
public Cursor searchCustomer(String inputText) throws SQLException {
Log.w(TAG, inputText);
String query = "SELECT docid as _id," + KEY_NAME + "," + "," +
" from " + FTS_VIRTUAL_TABLE +
" where " + KEY_NAME + " MATCH '" + inputText + "';";
Log.w(TAG, query);
Cursor mCursor = mDb.rawQuery(query,null);
if (mCursor != null) {
mCursor.moveToFirst();
}
return mCursor;
}
public boolean deleteAllCustomers() {
int doneDelete = 0;
doneDelete = mDb.delete(FTS_VIRTUAL_TABLE, null , null);
Log.w(TAG, Integer.toString(doneDelete));
return doneDelete > 0;
}
}
请帮我解决这个问题..
答案 0 :(得分：0)
你确定传入的查询有一些结果吗？
String query = intent.getStringExtra(SearchManager.QUERY);
showResults(query);
而不是：
if (cursor == null) {
// There are no results
inputSearch.setText(getString(R.string.no_results, new Object[] {query}));
}
尝试：
if (cursor == null || !cursor.moveToFirst()) {
// There are no results
inputSearch.setText(getString(R.string.no_results, new Object[] {query}));
}