複数の編集テキストとスピナーデータをSQLiteデータベースに追加するには？

Question

私はアンドロイドスタジオの新人です。どうすれば複数のテキストフィールドデータをsqliteデータベースに追加することができますか教えてください。

Answer 1

#xml files for layout 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" 
    android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin" 
    android:paddingRight="@dimen/activity_horizontal_margin" 
    android:orientation="vertical" 
    android:paddingTop="@dimen/activity_vertical_margin" 
    android:paddingBottom="@dimen/activity_vertical_margin" tools:context=".MainActivity"> 

    <TextView 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:text="Name" 
     android:id="@+id/textViewName" /> 

    <EditText 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     android:id="@+id/editTextName" /> 

    <TextView 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:text="Address" 
     android:id="@+id/textViewAddress" /> 

    <EditText 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     android:id="@+id/editTextAddress" /> 

    <Button 
     style="?android:attr/buttonStyleSmall" 
     android:layout_width="fill_parent" 
     android:layout_height="wrap_content" 
     android:text="Add" 
     android:id="@+id/btnAdd" /> 

    <Button 
     android:layout_width="fill_parent" 
     android:layout_height="wrap_content" 
     android:text="View Peoples" 
     android:id="@+id/btnView" /> 
</LinearLayout> 
The java file is as follows 
import android.content.Context; 
import android.content.Intent; 
import android.database.sqlite.SQLiteDatabase; 
import android.support.v7.app.ActionBarActivity; 
import android.os.Bundle; 
import android.view.Menu; 
import android.view.MenuItem; 
import android.view.View; 
import android.widget.Button; 
import android.widget.EditText; 
import android.widget.Toast; 


public class MainActivity extends ActionBarActivity implements View.OnClickListener { 

    private EditText editTextName; 
    private EditText editTextAdd; 
    private Button btnAdd; 
    private Button btnView; 

    private SQLiteDatabase db; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 

     createDatabase(); 

     editTextName = (EditText) findViewById(R.id.editTextName); 
     editTextAdd = (EditText) findViewById(R.id.editTextAddress); 

     btnAdd = (Button) findViewById(R.id.btnAdd); 
     btnView = (Button) findViewById(R.id.btnView); 

     btnAdd.setOnClickListener(this); 
     btnView.setOnClickListener(this); 
    } 


    protected void createDatabase(){ 
     db=openOrCreateDatabase("PersonDB", Context.MODE_PRIVATE, null); 
     db.execSQL("CREATE TABLE IF NOT EXISTS persons(id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, name VARCHAR,address VARCHAR);"); 
    } 

    protected void insertIntoDB(){ 
     String name = editTextName.getText().toString().trim(); 
     String add = editTextAdd.getText().toString().trim(); 
     if(name.equals("") || add.equals("")){ 
      Toast.makeText(getApplicationContext(),"Please fill all fields", Toast.LENGTH_LONG).show(); 
      return; 
     } 

     String query = "INSERT INTO persons (name,address) VALUES('"+name+"', '"+add+"');"; 
     db.execSQL(query); 
     Toast.makeText(getApplicationContext(),"Saved Successfully", Toast.LENGTH_LONG).show(); 
    } 


    @Override 
    public boolean onCreateOptionsMenu(Menu menu) { 
     // Inflate the menu; this adds items to the action bar if it is present. 
     getMenuInflater().inflate(R.menu.menu_main, menu); 
     return true; 
    } 

    @Override 
    public boolean onOptionsItemSelected(MenuItem item) { 
     // Handle action bar item clicks here. The action bar will 
     // automatically handle clicks on the Home/Up button, so long 
     // as you specify a parent activity in AndroidManifest.xml. 
     int id = item.getItemId(); 

     //noinspection SimplifiableIfStatement 
     if (id == R.id.action_settings) { 
      return true; 
     } 

     return super.onOptionsItemSelected(item); 
    } 

    @Override 
    public void onClick(View v) { 
     if(v == btnAdd){ 
      insertIntoDB(); 
     } 
    } 
}