您好我是Android的新手，我正在尝试创建一个字典，但我无法在我的应用中获得autocompletetextview。在搜索数据库时，我需要在db中自动完成单词的自动填充。我在这里搜索了很多东西，但找不到任何东西，所以我真的需要一些专家的帮助。提前谢谢..
XML
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainSearch" >
<LinearLayout
android:id="@+id/linearLayout1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:background="#eee"
android:gravity="center_vertical|center_horizontal"
android:minHeight="80dp"
android:paddingBottom="10dp"
android:paddingTop="10dp"
android:textAlignment="center" >
<EditText
android:id="@+id/editText1"
style="@style/EditText.Style"
android:layout_width="0dip"
android:layout_weight="3"
android:layout_height="wrap_content"
android:hint="@string/hint"
android:inputType="text" >
</EditText>
<ImageView
android:id="@+id/imageButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginRight="1dip"
android:src="@drawable/ic_search_white_48dp" />
</LinearLayout>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/relativeLayout"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_below="@+id/linearLayout1" >
<ScrollView
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_below="@+id/linearLayout1"
android:background="#fff" >
<LinearLayout
android:id="@+id/resultsLayout"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:paddingTop="12dp" >
</LinearLayout>
</ScrollView>
</RelativeLayout>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:gravity="bottom|right"
android:orientation="horizontal"
android:padding="10dp" >
<ImageView
android:id="@+id/infoButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/infoiconround" />
</LinearLayout>
</RelativeLayout>
JAVA
public class MainSearch extends Activity {
private Button mBtnNew;
private static final String TAG = "OLAM LOGGER in MAIN";
ProgressDialog pDialog;
LinearLayout resLayout;
LinearLayout layout;
LayoutParams params;
PopupWindow popUp;
ImageView logo;
TextView appDesc;
TextView appDescEn;
TextView aboutTitle;
TextView olamAuthor;
TextView just_a_new_line;
TextView olamUrl;
boolean click = true;
EditText editText;
Typeface tf;
DatabaseHelper dbHelper;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main_search);
resLayout = (LinearLayout) findViewById(R.id.resultsLayout);
tf = Typeface.createFromAsset(getBaseContext().getAssets(),"Meera.ttf");
dbHelper = new DatabaseHelper(this);
ImageView button = (ImageView) findViewById(R.id.imageButton);
//Creating Olam database if not exist from DB file in Assets.
try {
Log.v(TAG, "Copying the database");
dbHelper.createDatabase();
}
catch (IOException ioe) {
Log.v(TAG, "Unable to create database");
}
//Opening the database for operation with search button
try {
dbHelper.openDatabase();
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
editText = (EditText) findViewById(R.id.editText1);
String searchString = editText.getText().toString();
if(searchString.trim().length() != 0 && !searchString.isEmpty()) {
resLayout.removeAllViews();
new doSearch().execute();
}
}
});
}
catch (SQLiteException sqle) {
throw sqle;
}
//Opening the database for operation with keyboard GO button
try {
dbHelper.openDatabase();
editText = (EditText) findViewById(R.id.editText1);
editText.setOnEditorActionListener(new OnEditorActionListener() {
@Override
public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
if(actionId==EditorInfo.IME_ACTION_DONE){
//do something
String searchString = editText.getText().toString();
if(searchString.trim().length() != 0 && !searchString.isEmpty()) {
resLayout.removeAllViews();
new doSearch().execute();
}
}
return false;
}
});
}
catch (SQLiteException sqle) {
throw sqle;
}
// About info popup
layout = new LinearLayout(this);
logo = new ImageView(this);
popUp = new PopupWindow(this);
aboutTitle = new TextView(this);
appDesc = new TextView(this);
appDescEn = new TextView(this);
olamAuthor = new TextView(this);
just_a_new_line = new TextView(this);
olamUrl = new TextView(this);
layout.setOrientation(LinearLayout.VERTICAL);
layout.setBackgroundColor(Color.WHITE);
aboutTitle.setText(R.string.title);
aboutTitle.setTextSize(30);
aboutTitle.setTypeface(tf,Typeface.BOLD);
aboutTitle.setGravity(Gravity.CENTER_HORIZONTAL);
appDesc.setText(R.string.app_description);
appDesc.setTextSize(TypedValue.COMPLEX_UNIT_DIP,20);
appDesc.setTypeface(tf);
appDesc.setGravity(Gravity.CENTER_HORIZONTAL);
appDescEn.setText(R.string.app_description_english);
appDescEn.setTextSize(TypedValue.COMPLEX_UNIT_DIP,10);
appDescEn.setGravity(Gravity.CENTER_HORIZONTAL);
olamAuthor.setText(Html.fromHtml(getResources().getString(R.string.olam_author)));
olamAuthor.setTextSize(11);
olamAuthor.setMovementMethod(LinkMovementMethod.getInstance());
olamAuthor.setGravity(Gravity.CENTER_HORIZONTAL);
just_a_new_line.setText(R.string.just_a_new_line);
just_a_new_line.setTextSize(10);
just_a_new_line.setMovementMethod(LinkMovementMethod.getInstance());
just_a_new_line.setGravity(Gravity.LEFT);
olamUrl.setText(Html.fromHtml(getResources().getString(R.string.olam_url)));
olamUrl.setTextSize(13);
olamUrl.setMovementMethod(LinkMovementMethod.getInstance());
olamUrl.setGravity(Gravity.CENTER_HORIZONTAL);
layout.addView(aboutTitle);
layout.addView(appDesc);
layout.addView(appDescEn);
layout.addView(olamAuthor);
layout.addView(just_a_new_line);
layout.addView(olamUrl);
layout.setBackgroundResource(drawable.popupbox);
popUp.setBackgroundDrawable(new BitmapDrawable());
popUp.setOutsideTouchable(true);
popUp.setContentView(layout);
ImageView infoButton = (ImageView) findViewById(R.id.infoButton);
infoButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if(click){
popUp.showAtLocation(v, Gravity.CENTER, 10, 10);
popUp.update(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
click = false;
}
else {
popUp.dismiss();
click = true;
}
}
});
//about window end
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
// Override back button
if (keyCode == KeyEvent.KEYCODE_BACK) {
if (popUp.isShowing()) {
popUp.dismiss();
return false;
}
}
return super.onKeyDown(keyCode, event);
}
//searching done as an async task
class doSearch extends AsyncTask<String, String, String> {
String searchString;
Map<String, String> matches;
Map<String, ArrayList<Map<String, String>>> results = new HashMap<String, ArrayList<Map<String, String>>>();
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(MainSearch.this);
pDialog.setMessage(Html.fromHtml("<b>I am looking...........</b>"));
pDialog.setIndeterminate(false);
pDialog.setCancelable(false);
pDialog.show();
}
@Override
protected String doInBackground(String... params) {
// TODO Auto-generated method stub
EditText editText = (EditText) findViewById(R.id.editText1);
searchString = editText.getText().toString();
//Logic for cancelling out apostrophe from entered query.
if (searchString.contains("'")) {
/*
temp is a StringBuilder used to store searchString after filtering out
apostrophe.
*/
StringBuilder temp = new StringBuilder();
for (char c : searchString.toCharArray()) {
if (c != '\'')
temp.append(c);
}
searchString = temp.toString();
if (searchString.trim().equals(""))
searchString = ":";
}
Log.v(TAG, searchString);
if(searchString != null && !searchString.isEmpty()) {
Stemmer stem = new Stemmer();
String stems = stem.completeStem(searchString.toLowerCase());
Log.v("Stemmer Tag", stems);
matches = dbHelper.getSimilarStems(stems);
//
if(!matches.isEmpty()) {
String[] resultIDs = new String[matches.size()];
int i=0;
for (Map.Entry<String, String> entry : matches.entrySet()) {
String resultID = entry.getKey();
String word = entry.getValue();
resultIDs[i] = resultID;
i++;
}
results = dbHelper.getDefinitions(resultIDs);
Log.v("List Map Tag", "List Map created");
//results = dbHelper.searchDatabase(stems);
Log.v(TAG, "Search Results Got back");
}
}
return null;
}
@Override
protected void onPostExecute(String file_url) {
pDialog.dismiss();
Log.v(TAG, "Dismissed Progress Dialog");
renderResults();
}
protected void renderResults(){
int i=1;
if(matches.isEmpty()) {
TextView sorryMsg = new TextView(MainSearch.this);
TextView addUrl = new TextView(MainSearch.this);
sorryMsg.setText(R.string.sorry_not_found);
sorryMsg.setPadding(30, 15, 30, 0);
sorryMsg.setGravity(Gravity.CENTER);
sorryMsg.setTypeface(tf, Typeface.BOLD);
sorryMsg.setTextSize(18);
resLayout.addView(sorryMsg);
addUrl.setText(Html.fromHtml(""));
addUrl.setPadding(30, 15, 30, 0);
addUrl.setGravity(Gravity.CENTER);
addUrl.setTypeface(null, Typeface.BOLD);
addUrl.setTextSize(18);
addUrl.setMovementMethod(LinkMovementMethod.getInstance());
resLayout.addView(addUrl);
}
else {
for (Map.Entry<String, String> entry : matches.entrySet()) {
String wordID = entry.getKey();
String word = entry.getValue();
TextView title = new TextView(MainSearch.this);
title.setText(i+". "+word);
title.setPadding(50, 20, 0, 0);
title.setTextSize(16);
title.setTypeface(null, Typeface.BOLD);
resLayout.addView(title);
i++;
int nounFlag = 0;
int verbFlag = 0;
int adjFlag = 0;
ArrayList<Map<String, String>> res = results.get(wordID);
for(Map<String,String> mapIt : res) {
LinearLayout nounLayout;
nounLayout = new LinearLayout(MainSearch.this);
nounLayout.setOrientation(LinearLayout.VERTICAL);
nounLayout.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT));
LinearLayout verbLayout;
verbLayout = new LinearLayout(MainSearch.this);
verbLayout.setOrientation(LinearLayout.VERTICAL);
verbLayout.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT));
LinearLayout adjLayout;
adjLayout = new LinearLayout(MainSearch.this);
adjLayout.setOrientation(LinearLayout.VERTICAL);
adjLayout.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT));
LinearLayout generalLayout;
generalLayout = new LinearLayout(MainSearch.this);
generalLayout.setOrientation(LinearLayout.VERTICAL);
generalLayout.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT));
for (Map.Entry<String, String> resultMap : mapIt.entrySet()) {
String meaning = resultMap.getKey();
String type = resultMap.getValue();
if(type.equals("n")) //if equals a noun
{
Log.v(TAG, "Noun");
TextView temp = new TextView(MainSearch.this);
if(nounFlag==0) {
TextView typeView = new TextView(MainSearch.this);
typeView.setText(R.string.noun);
typeView.setTypeface(tf, Typeface.ITALIC);
typeView.setTextSize(15);
typeView.setTextColor(Color.GRAY);
typeView.setPadding(90, 15, 15, 0);
nounLayout.addView(typeView);
meaning = meaning;
temp.setText(meaning);
typeView.setTextColor(Color.RED);
temp.setPadding(100, 15, 15, 0);
temp.setTypeface(tf);
temp.setTextSize(19);
nounLayout.addView(temp);
nounFlag=1;
}
else {
meaning = " "+meaning;
temp.setText(meaning);
temp.setPadding(100, 15, 15, 0);
temp.setTypeface(tf);
temp.setTextSize(19);
nounLayout.addView(temp);
}
}
else if(type.equals("v")) //if equals a verb
{
Log.v(TAG,"Verb");
TextView temp = new TextView(MainSearch.this);
if(verbFlag==0) {
TextView typeView = new TextView(MainSearch.this);
typeView.setText(R.string.verb);
typeView.setTypeface(tf, Typeface.ITALIC);
typeView.setTextColor(Color.GRAY);
typeView.setTextSize(15);
typeView.setPadding(90, 15, 15, 0);
verbLayout.addView(typeView);
meaning = ""+meaning;
temp.setText(meaning);
temp.setPadding(100, 15, 15, 0);
temp.setTypeface(tf);
temp.setTextSize(19);
verbLayout.addView(temp);
verbFlag=1;
}
else {
meaning = ""+meaning;
temp.setText(meaning);
temp.setPadding(100, 15, 15, 0);
temp.setTypeface(tf);
temp.setTextSize(19);
verbLayout.addView(temp);
}
}
else if(type.equals("a")) //if equals an adjective
{
Log.v(TAG,"Adjective");
TextView temp = new TextView(MainSearch.this);
if(adjFlag==0) {
TextView typeView = new TextView(MainSearch.this);
typeView.setText(R.string.adjective);
typeView.setTypeface(tf, Typeface.ITALIC);
typeView.setTextColor(Color.GRAY);
typeView.setTextSize(15);
typeView.setPadding(90, 15, 15, 0);
adjLayout.addView(typeView);
meaning = meaning;
temp.setText(meaning);
temp.setPadding(100, 15, 15, 0);
temp.setTypeface(tf);
temp.setTextSize(19);
adjLayout.addView(temp);
adjFlag=1;
}
else {
meaning = meaning;
temp.setText(meaning);
temp.setPadding(100, 15, 15, 0);
temp.setTypeface(tf);
temp.setTextSize(19);
adjLayout.addView(temp);
}
}
else { //if equals everything else
TextView temp = new TextView(MainSearch.this);
meaning = meaning;
temp.setText(meaning);
temp.setPadding(100, 15, 15, 0);
temp.setTypeface(tf);
temp.setTextSize(19);
generalLayout.addView(temp);
}
resLayout.addView(nounLayout);
resLayout.addView(verbLayout);
resLayout.addView(adjLayout);
resLayout.addView(generalLayout);
}
}
}
}
}
}
}
答案 0 :(得分：0)
尝试这种方式它会对你有用
public class MainActivity extends Activity {
CustomAutoCompleteView myAutoComplete;
// adapter for auto-complete
ArrayAdapter<String> myAdapter;
// for database operations
DatabaseHandler databaseH;
// just to add some initial value
String[] item = new String[] {"Please search..."};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
try{
// instantiate database handler
databaseH = new DatabaseHandler(MainActivity.this);
// put sample data to database
insertSampleData();
// autocompletetextview is in activity_main.xml
myAutoComplete = (CustomAutoCompleteView) findViewById(R.id.myautocomplete);
// add the listener so it will tries to suggest while the user types
myAutoComplete.addTextChangedListener(new CustomAutoCompleteTextChangedListener(this));
// set our adapter
myAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_dropdown_item_1line, item);
myAutoComplete.setAdapter(myAdapter);
} catch (NullPointerException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
}
public void insertSampleData(){
// CREATE
databaseH.create( new MyObject("January") );
databaseH.create( new MyObject("February") );
databaseH.create( new MyObject("March") );
databaseH.create( new MyObject("April") );
databaseH.create( new MyObject("May") );
databaseH.create( new MyObject("June") );
databaseH.create( new MyObject("July") );
databaseH.create( new MyObject("August") );
databaseH.create( new MyObject("September") );
databaseH.create( new MyObject("October") );
databaseH.create( new MyObject("November") );
databaseH.create( new MyObject("December") );
databaseH.create( new MyObject("New Caledonia") );
databaseH.create( new MyObject("New Zealand") );
databaseH.create( new MyObject("Papua New Guinea") );
databaseH.create( new MyObject("COFFEE-1K") );
databaseH.create( new MyObject("coffee raw") );
databaseH.create( new MyObject("authentic COFFEE") );
databaseH.create( new MyObject("k12-coffee") );
databaseH.create( new MyObject("view coffee") );
databaseH.create( new MyObject("Indian-coffee-two") );
}
// this function is used in CustomAutoCompleteTextChangedListener.java
public String[] getItemsFromDb(String searchTerm){
// add items on the array dynamically
List<MyObject> products = databaseH.read(searchTerm);
int rowCount = products.size();
String[] item = new String[rowCount];
int x = 0;
for (MyObject record : products) {
item[x] = record.objectName;
x++;
}
return item;
}
}
https://www.codeofaninja.com/2013/11/android-autocompletetextview-example-sqlite-database.html