我创建了一个 EditText 来插入我的名字和一个来插入我的姓氏。当我单击添加时,它必须将我的名字保存到微调器中,当我单击它时,我想将我的名字和姓氏显示在 edittext 中。我已经创建了此代码,但它保存并仅将名称重新加载到 EditText Name 和 EditText Surname 中。我该怎么办?是否可以仅单击名称微调器重新加载姓氏?这是我的代码:
// Spinner element
Spinner spinner;
// Add button
Button btnAdd, btnReset;
// Input text
EditText inputLabel, surname, cf, age;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
// Spinner element
spinner = (Spinner) findViewById(R.id.spinner);
// add button
btnAdd = (Button) findViewById(R.id.btn_add);
//reset Button
btnReset =(Button) findViewById (R.id.btn_reset);
// new label input field
inputLabel = (EditText) findViewById(R.id.editTextName);
surname = (EditText) findViewById(R.id.editTextSurName);
cf = (EditText) findViewById(R.id.editTextCodicefiscale);
age = (EditText) findViewById(R.id.editTextAge);
// Spinner click listener
spinner.setOnItemSelectedListener(this);
// Loading spinner data from database
loadSpinnerData();
/**
* Add new label button click listener
* */
btnAdd.setOnClickListener(new View.OnClickListener() {
public void onClick(View arg0) {
String label = inputLabel.getText().toString();
String label2 = surname.getText().toString();
if (label.trim().length() > 0) {
// database handler
DatabaseHandler db = new DatabaseHandler(
getApplicationContext());
// inserting new label into database
db.insertLabel(label);
db.insertLabel2(label2);
// making input filed text to blank
inputLabel.setText("");
surname.setText("");
// Hiding the keyboard
InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
imm.hideSoftInputFromWindow(inputLabel.getWindowToken(), 0);
imm.hideSoftInputFromWindow(surname.getWindowToken(), 0);
// loading spinner with newly added data
loadSpinnerData();
} else {
Toast.makeText(getApplicationContext(), "Please enter label name",
Toast.LENGTH_SHORT).show();
}
}
});
btnReset.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
inputLabel.setText("");
surname.setText("");
cf.setText("");
age.setText("");
}
});
}
/**
* Function to load the spinner data from SQLite database
* */
private void loadSpinnerData() {
// database handler
DatabaseHandler db = new DatabaseHandler(getApplicationContext());
// Spinner Drop down elements
List<String> lables = db.getAllLabels();
// Creating adapter for spinner
ArrayAdapter<String> dataAdapter = new ArrayAdapter<String>(this,
android.R.layout.simple_spinner_item, lables);
// Drop down layout style - list view with radio button
dataAdapter
.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
// attaching data adapter to spinner
spinner.setAdapter(dataAdapter);
}
public void onItemSelected(AdapterView<?> parent, View view, int position,
long id) {
// On selecting a spinner item
String label = parent.getItemAtPosition(position).toString();
String label2 = parent.getItemAtPosition(position).toString();
inputLabel.setText(label);
surname.setText(label2);
// Showing selected spinner item
Toast.makeText(parent.getContext(), "You selected: " + label,
Toast.LENGTH_LONG).show();
}
public void onNothingSelected(AdapterView<?> arg0) {
// TODO Auto-generated method stub
}
}
这是我的数据库处理程序:
// Database Version
private static final int DATABASE_VERSION = 1;
// Database Name
private static final String DATABASE_NAME = "spinnerExample";
// Labels table name
private static final String TABLE_LABELS = "labels";
// Labels Table Columns names
private static final String KEY_ID = "id";
private static final String KEY_NAME = "name";
private static final String KEY_SURNAME = "surname";
public DatabaseHandler(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
// Creating Tables
@Override
public void onCreate(SQLiteDatabase db) {
// Category table create query
String CREATE_CATEGORIES_TABLE = "CREATE TABLE " + TABLE_LABELS + "("
+ KEY_ID + " INTEGER PRIMARY KEY," + KEY_NAME + KEY_SURNAME + " TEXT)";
db.execSQL(CREATE_CATEGORIES_TABLE);
}
// Upgrading database
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
// Drop older table if existed
db.execSQL("DROP TABLE IF EXISTS " + TABLE_LABELS);
// Create tables again
onCreate(db);
}
/**
* Inserting new lable into lables table
* */
public void insertLabel(String label){
SQLiteDatabase db = this.getWritableDatabase();
ContentValues values = new ContentValues();
values.put(KEY_NAME, label);
// Inserting Row
db.insert(TABLE_LABELS, null, values);
db.close(); // Closing database connection
}
public void insertLabel2(String label2){
SQLiteDatabase db = this.getWritableDatabase();
ContentValues values2 = new ContentValues();
values2.put(KEY_SURNAME, label2);
// Inserting Row
db.insert(TABLE_LABELS, null, values2);
db.close(); // Closing database connection
}
/**
* Getting all labels
* returns list of labels
* */
public List<String> getAllLabels(){
List<String> labels = new ArrayList<String>();
// Select All Query
String selectQuery = "SELECT * FROM " + TABLE_LABELS;
SQLiteDatabase db = this.getReadableDatabase();
Cursor cursor = db.rawQuery(selectQuery, null);
// looping through all rows and adding to list
if (cursor.moveToFirst()) {
do {
labels.add(cursor.getString(1));
} while (cursor.moveToNext());
}
// closing connection
cursor.close();
db.close();
// returning lables
return labels;
}
}