I create a Search Layout it good work .But it get me crash often :
RecyclerView﹕ No adapter attached; skipping layout
Here is my SearchActivity.java :
public class SearchActivity extends Activity implements RadioGroup.OnCheckedChangeListener{
public static final String DIR_SDCARD = Environment.getExternalStorageDirectory().getAbsolutePath();
public static final String DIR_DATABASE = DIR_SDCARD + "/Android/data/";
public ArrayAdapter adapter;
public Cursor cursor_id;
public Cursor cursor_final;
public static String PACKAGE_NAME;
EditText editText;
DB db = new DB(SearchActivity.this);
public Cursor cursor;
public SQLiteDatabase sql;
RecyclerView recList;
Context context;
RadioGroup radioGroup;
int RadioID = R.id.rbNormal;
int b = 0;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_search);
context = getApplicationContext();
PACKAGE_NAME = getApplicationContext().getPackageName();
CreateFile();
db.GetPackageName(PACKAGE_NAME);
try {
db.CreateandOpenDataBase();
} catch (IOException e) {
e.printStackTrace();
}
sql = db.openDataBase();
editText = (EditText) findViewById(R.id.search);
final Button btnSearch = (Button) findViewById(R.id.btnSearch);
final TextView tv = (TextView) findViewById(R.id.text);
recList = (RecyclerView) findViewById(R.id.cardList);
recList.setHasFixedSize(true);
LinearLayoutManager llm = new LinearLayoutManager(this);
llm.setOrientation(LinearLayoutManager.VERTICAL);
radioGroup = (RadioGroup) findViewById(R.id.rgSearch);
radioGroup.setOnCheckedChangeListener(this);
recList.setLayoutManager(llm);
btnSearch.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent motionevent) {
if (editText.getText().length() >= 2){
tv.setVisibility(View.VISIBLE);
}
int action = motionevent.getAction();
if (action == MotionEvent.ACTION_UP) {
if (editText.getText().length() < 2) {
Toast.makeText(SearchActivity.this, "Please enter two character!",
Toast.LENGTH_SHORT).show();
return true;
} else {
InputMethodManager im = (InputMethodManager) context.getSystemService(Context.INPUT_METHOD_SERVICE);
im.hideSoftInputFromWindow(getWindow().getDecorView().getWindowToken(), InputMethodManager.HIDE_NOT_ALWAYS);
ContactAdapter ca = new ContactAdapter(createList(editText.getText()),context);
if(ca != null){
recList.setAdapter(ca);
tv.setVisibility(View.VISIBLE);
tv.setText(String.valueOf(b) + " " + getResources().getString(R.string.result));
}
}
}
return false;
}
});
}
private List<StructSearch> createList(Editable editable) {
b = 0;
String _Text = editable.toString();
String sq = null;
if (RadioID == R.id.rbNormal) {
sq = "Question like '%"+_Text+"%'";
}
else if (RadioID == R.id.rbAnd) {
String[] parts = Pattern.compile(" ", Pattern.LITERAL).split(_Text);
for(String Result : parts) {
sq += " Question like '%" + Result + "%' and";
}
sq = sq.substring(4, sq.length()-3);
} else if (RadioID == R.id.rbOr) {
String[] parts = Pattern.compile(" ", Pattern.LITERAL).split(_Text);
for(String Result : parts) {
sq += " or Question like '%" + Result + "%'";
}
}
List<StructSearch> result = new ArrayList<StructSearch>();
try {
cursor = sql.rawQuery("SELECT * FROM WebSite_QaListDB WHERE "+sq, null);
if (cursor != null && cursor.moveToFirst()) {
do {
StructSearch ci = new StructSearch();
ci.Q_QaID = cursor.getInt(cursor.getColumnIndex("QaID"));
ci.Q_Question = cursor.getString(cursor.getColumnIndex("Question"));
ci.Q_Answer = cursor.getString(cursor.getColumnIndex("Answer"));
ci.Q_Title = cursor.getString(cursor.getColumnIndex("Title"));
cursor_id = sql.rawQuery("SELECT Item2ID FROM WebSite_ReleatedDB WHERE Item1ID =" + ci.Q_QaID, null);
try {
if (cursor_id != null && cursor_id.moveToFirst()) {
do {
ci.R_Item2ID = cursor_id.getInt(cursor_id.getColumnIndex("Item2ID"));
cursor_final = sql.rawQuery("SELECT Title FROM WebSite_CategoryDB WHERE CategoryID =" + ci.R_Item2ID
+ " AND parentID != 0" ,null);
try {
if (cursor_final != null && cursor_final.moveToFirst()){
do {
ci.C_Title = cursor_final.getString(cursor_final.getColumnIndex("Title"));
}while (cursor_final.moveToNext());
}
}catch (Exception e){
Log.i("xxx", "You have an error");
}finally {
if (cursor_final != null){
cursor_final.close();
}
}
} while (cursor_id.moveToNext());
}
}catch (Exception e){
Log.i("xxx", "You have an error");
}finally {
if (cursor_id != null) {
cursor_id.close();
}
}
result.add(ci);
b++;
} while (cursor.moveToNext());
adapter.notifyDataSetChanged();
}
} catch (Exception e) {
Log.i("xxx", "You have an error");
} finally {
if (cursor != null) {
cursor.close();
}
}
return result;
}
private boolean CreateFile(){
File file = new File(DIR_DATABASE + PACKAGE_NAME + "/BankDB");
boolean flag =file.mkdirs();
if(flag){
Log.i("A_LOG","Create File");
return true;
}else {
Log.e("A_LOG","Do not Create File");
return false;
}
}
@Override
public void onCheckedChanged(RadioGroup group, int checkedId) {
RadioID = 0;
RadioID = checkedId;
}
}
All of code good work I think my error is from here :
if(ca != null){
recList.setAdapter(ca);
...
}
If you need see my Adapter.java and DB.java or layouts I can show it.
I am using from Android Studio.
Image of layout(Search), my layout has a RadioGroup for optional search on my DataBase:
Instead of this
ContactAdapter ca = new ContactAdapter(createList(editText.getText()),context);
Write this code
OR
OR
I am not sure but it might be help to you.