I know there are many topics about this theme, I'just read around 20 of them, and I honestly wasn't able to integrate with my code.
I made one spinner that read and list the values of one column so I can choose any of it, but now based on this selected item, I need to read some others values from its same row I know that I need to use SELECT COLUMN FROM TABLE WHERE NAME = VALUE, but I dont know how to use it with the correct syntax in my code; How can I do that ? Basically, I wanna get the value from any other column of the same row of the selected item in the spinner, and then put it in a TextView, in this case on target1
These are the codes:
DatabaseHandler.java
package com.example.androidhive;
import java.util.ArrayList;
import java.util.List;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
public class DatabaseHandler extends SQLiteOpenHelper {
// Database Version
private static final int DATABASE_VERSION = 1;
// Database Name
private static final String DATABASE_NAME = "TESTE5";
// Labels table name
private static final String TABLE_LABELS = "TUBOS";
// Labels Table Columns names
private static final String KEY_ID = "id";
private static final String KEY_NAME = "name";
private static final String KEY_TITULO = "TITULO";
private static final String KEY_DIA_NOM = "DIA_NOM";
private static final String KEY_DIA_EXT = "DIA_EXT";
private static final String KEY_DIA_INT = "DIA_INT";
private static final String KEY_AREA_INT = "AREA_INT";
private static final String KEY_ESP_MM = "ESP_MM";
private static final String KEY_ESP_POL = "ESP_POL";
private static final String KEY_SCH = "SCH";
private static final String KEY_SCH_N = "SCH_N";
private static final String KEY_PESO_LINEAR = "PESO_LINEAR";
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 + " TEXT," + KEY_TITULO + " TEXT," + KEY_DIA_NOM + " TEXT," + KEY_DIA_EXT + " DOUBLE," + KEY_DIA_INT + " DOUBLE," + KEY_AREA_INT + " DOUBLE," + KEY_ESP_MM + " DOUBLE," + KEY_ESP_POL + " TEXT," + KEY_SCH + " TEXT," + KEY_SCH_N + " INTEGER," + KEY_PESO_LINEAR + " DOUBLE)";
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
}
/**
* 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 {
//aqui é o numero da coluna, comencando a contagem pelo numero 0.
labels.add(cursor.getString(0));
} while (cursor.moveToNext());
}
// closing connection
cursor.close();
db.close();
// returning lables
return labels;
}
}
AndroidSpinnerFromSQLiteActivity.java
package com.example.androidhive;
import java.util.List;
import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.view.View;
import android.view.inputmethod.InputMethodManager;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Spinner;
import android.widget.TextView;
import android.widget.Toast;
public class AndroidSpinnerFromSQLiteActivity extends Activity implements
OnItemSelectedListener {
// Spinner element
Spinner spinner;
// Add button
Button btnAdd;
// Input text
EditText inputLabel;
TextView target1;
@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);
// new label input field
inputLabel = (EditText) findViewById(R.id.input_label);
target1 = (TextView) findViewById(R.id.target1);
// Spinner click listener
spinner.setOnItemSelectedListener(this);
// Loading spinner data from database
loadSpinnerData();
/**
* Add new label button click listener
* */
btnAdd.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
String label = inputLabel.getText().toString();
if (label.trim().length() > 0) {
// database handler
DatabaseHandler db = new DatabaseHandler(
getApplicationContext());
// inserting new label into database
db.insertLabel(label);
// making input filed text to blank
inputLabel.setText("");
// Hiding the keyboard
InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
imm.hideSoftInputFromWindow(inputLabel.getWindowToken(), 0);
// loading spinner with newly added data
loadSpinnerData();
} else {
Toast.makeText(getApplicationContext(), "Please enter label name",
Toast.LENGTH_SHORT).show();
}
}
});
}
/**
* 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);
}
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position,
long id) {
// On selecting a spinner item
String label = parent.getItemAtPosition(position).toString();
// Showing selected spinner item
Toast.makeText(parent.getContext(), "You selected: " + label,
Toast.LENGTH_LONG).show();
}
@Override
public void onNothingSelected(AdapterView<?> arg0) {
// TODO Auto-generated method stub
}
}
main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://ift.tt/nIICcg"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<!-- Label -->
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Add New Label"
android:padding="8dip" />
<!-- Input Text -->
<EditText android:id="@+id/input_label"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="8dip"
android:layout_marginRight="8dip"/>
<!-- Add Button -->
<Button android:id="@+id/btn_add"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Add Label"
android:layout_marginLeft="8dip"
android:layout_marginTop="8dip"/>
<!-- Select Label -->
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Select Label"
android:padding="8dip" />
<!-- Spinner Dropdown -->
<Spinner
android:id="@+id/spinner"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:prompt="@string/spinner_title"
android:layout_marginTop="20dip"
android:layout_marginLeft="8dip"
android:layout_marginRight="8dip"
/>
<TextView
android:layout_margin="50dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text="Large Text"
android:layout_gravity="center_horizontal"
android:id="@+id/target1" />"
</LinearLayout>
Thanks very much. Barata
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