Issue
Trying to replace spinner with buttons dynamically populated from database. Normally spinner use array adapter and built-in List Item Layouts "android.R.layout.simple_spinner_item"etc.
How should it be modified if instead of spinner you want to populate buttons?
Should I replace layouts for spinner in my in loadDifficulties() method with layouts for buttons?
HERE HOW IT WORKED WITH SPINNER
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_starting_screen);
spinnerDifficulty = findViewById(R.id.spinner_quizlist);
loadDifficulties();
Button startTest = findViewById(R.id.start_test);
startTest.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
startQuiz();
}
});
}
private void startQuiz() {
ListQuiz selectedLevel = (ListQuiz) spinnerDifficulty.getSelectedItem();
int LevelListID = selectedLevel.getId();
String quizListName = selectedLevel.getName();
Intent intent = new Intent(StartingScreenActivity.this, MainActivity.class);
intent.putExtra(EXTRA_DIFFICULTY_ID, LevelListID);
intent.putExtra(EXTRA_DIFFICULTY_NAME, quizListName);
startActivityForResult(intent, REQUEST_CODE_QUIZ);
}
private void loadDifficulties(){
QuizDbHelper dbHelper = QuizDbHelper.getInstance(this);
List<ListQuiz> LevelList = dbHelper.getAllListQuiz();
ArrayAdapter<ListQuiz> adapterLevelList = new ArrayAdapter<>(this, android.R.layout.simple_spinner_item, LevelList); adapterLevelList.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinnerDifficulty.setAdapter(adapterLevelList);
}
Solution
Briefly
- Created LinearLayout for buttons.
- I didn't need to use ArrayAdapter in the loadDifficulties anymore.
Added all needed parameters to startQuiz() (in my case int & String) simplifying method to Intents only.
private ArrayAdapter <ListQuiz> adapter; private Button autobutton; public int categorySize; private List<ListQuiz> categoryName; private LinearLayout QuizListLayout; private Button levelButton; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_starting_screen); autobutton = findViewById(R.id.autobutton); loadDifficulties(); QuizListLayout = findViewById(R.id.layoutForButtons); for(int i=0; i<categorySize;i++){ levelButton =new Button(this); levelButton.setText("" + categoryName.get(i)); levelButton.setId(i); final int index = i; levelButton.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT)); levelButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { startQuiz(v.getId(), categoryName.get(index).toString()); } }); QuizListLayout.addView(levelButton); } } private void startQuiz(int LevelListID, String quizListName) { Intent intent = new Intent(StartingScreenActivity.this, MainActivity.class); intent.putExtra(EXTRA_DIFFICULTY_ID, LevelListID); intent.putExtra(EXTRA_DIFFICULTY_NAME, quizListName); startActivityForResult(intent, REQUEST_CODE_QUIZ); } private void loadDifficulties(){ QuizDbHelper dbHelper = QuizDbHelper.getInstance(this); List<ListQuiz> LevelList = dbHelper.getAllListQuiz(); categorySize = dbHelper.getAllListQuiz().size(); categoryName = dbHelper.getAllListQuiz();
buttonlayout.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:id="@+id/layoutForButtons">
</LinearLayout>
Answered By - Alex K
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