AndroidSQLite Example

AndroidSQLite Example

AndroidSQLite :
===============

import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.database.Cursor;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup.LayoutParams;
import android.widget.AdapterView;
import android.widget.Button;
import android.widget.EditText;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.SimpleCursorAdapter;
import android.widget.TextView;
import android.widget.Toast;

public class AndroidSQLite extends Activity {

EditText inputContent1, inputContent2;
Button buttonAdd, buttonDeleteAll;

private SQLiteAdapter mySQLiteAdapter;
ListView listContent;

SimpleCursorAdapter cursorAdapter;
Cursor cursor;

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
       
        inputContent1 = (EditText)findViewById(R.id.content1);
        inputContent2 = (EditText)findViewById(R.id.content2);
        buttonAdd = (Button)findViewById(R.id.add);
        buttonDeleteAll = (Button)findViewById(R.id.deleteall);
       
        listContent = (ListView)findViewById(R.id.contentlist);

        mySQLiteAdapter = new SQLiteAdapter(this);
        mySQLiteAdapter.openToWrite();

        cursor = mySQLiteAdapter.queueAll();
        String[] from = new String[]{SQLiteAdapter.KEY_ID, SQLiteAdapter.KEY_CONTENT1, SQLiteAdapter.KEY_CONTENT2};
        int[] to = new int[]{R.id.id, R.id.text1, R.id.text2};
        cursorAdapter =
        new SimpleCursorAdapter(this, R.layout.row, cursor, from, to);
        listContent.setAdapter(cursorAdapter);
        listContent.setOnItemClickListener(listContentOnItemClickListener);
       
        buttonAdd.setOnClickListener(buttonAddOnClickListener);
        buttonDeleteAll.setOnClickListener(buttonDeleteAllOnClickListener);
       
    }
   
    Button.OnClickListener buttonAddOnClickListener
    = new Button.OnClickListener(){

@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
String data1 = inputContent1.getText().toString();
String data2 = inputContent2.getText().toString();
mySQLiteAdapter.insert(data1, data2);
updateList();
}
   
    };
   
    Button.OnClickListener buttonDeleteAllOnClickListener
    = new Button.OnClickListener(){

@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
mySQLiteAdapter.deleteAll();
updateList();
}
   
    };
   
    private ListView.OnItemClickListener listContentOnItemClickListener
    = new ListView.OnItemClickListener(){

@Override
public void onItemClick(AdapterView<?> parent, View view, int position,
long id) {
// TODO Auto-generated method stub

Cursor cursor = (Cursor) parent.getItemAtPosition(position);
final int item_id = cursor.getInt(cursor.getColumnIndex(SQLiteAdapter.KEY_ID));
            String item_content1 = cursor.getString(cursor.getColumnIndex(SQLiteAdapter.KEY_CONTENT1));
            String item_content2 = cursor.getString(cursor.getColumnIndex(SQLiteAdapter.KEY_CONTENT2));
           
            AlertDialog.Builder myDialog
            = new AlertDialog.Builder(AndroidSQLite.this);
           
            myDialog.setTitle("Delete?");
           
            TextView dialogTxt_id = new TextView(AndroidSQLite.this);
            LayoutParams dialogTxt_idLayoutParams
             = new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
            dialogTxt_id.setLayoutParams(dialogTxt_idLayoutParams);
            dialogTxt_id.setText("#" + String.valueOf(item_id));
           
            TextView dialogC1_id = new TextView(AndroidSQLite.this);
            LayoutParams dialogC1_idLayoutParams
             = new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
            dialogC1_id.setLayoutParams(dialogC1_idLayoutParams);
            dialogC1_id.setText(item_content1);
           
            TextView dialogC2_id = new TextView(AndroidSQLite.this);
            LayoutParams dialogC2_idLayoutParams
             = new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
            dialogC2_id.setLayoutParams(dialogC2_idLayoutParams);
            dialogC2_id.setText(item_content2);
           
            LinearLayout layout = new LinearLayout(AndroidSQLite.this);
            layout.setOrientation(LinearLayout.VERTICAL);
            layout.addView(dialogTxt_id);
            layout.addView(dialogC1_id);
            layout.addView(dialogC2_id);
            myDialog.setView(layout);
           
            myDialog.setPositiveButton("OK", new DialogInterface.OnClickListener() {
                // do something when the button is clicked
                public void onClick(DialogInterface arg0, int arg1) {
                mySQLiteAdapter.delete_byID(item_id);
        updateList();
                 }
                });
           
            myDialog.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
                // do something when the button is clicked
                public void onClick(DialogInterface arg0, int arg1) {
       
                 }
                });
           
            myDialog.show();
           
           
}};

@Override
protected void onDestroy() {
// TODO Auto-generated method stub
super.onDestroy();
mySQLiteAdapter.close();
}



private void updateList(){
cursor.requery();
    }

}



SQLiteAdapter:
--------------


import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.database.sqlite.SQLiteDatabase.CursorFactory;

public class SQLiteAdapter {

public static final String MYDATABASE_NAME = "MY_DATABASE";
public static final String MYDATABASE_TABLE = "MY_TABLE";
public static final int MYDATABASE_VERSION = 1;
public static final String KEY_ID = "_id";
public static final String KEY_CONTENT1 = "Content1";
public static final String KEY_CONTENT2 = "Content2";

//create table MY_DATABASE (ID integer primary key, Content text not null);
private static final String SCRIPT_CREATE_DATABASE =
"create table " + MYDATABASE_TABLE + " ("
+ KEY_ID + " integer primary key autoincrement, "
+ KEY_CONTENT1 + " text not null, "
+ KEY_CONTENT2 + " text not null);";

private SQLiteHelper sqLiteHelper;
private SQLiteDatabase sqLiteDatabase;

private Context context;

public SQLiteAdapter(Context c){
context = c;
}

public SQLiteAdapter openToRead() throws android.database.SQLException {
sqLiteHelper = new SQLiteHelper(context, MYDATABASE_NAME, null, MYDATABASE_VERSION);
sqLiteDatabase = sqLiteHelper.getReadableDatabase();
return this;
}

public SQLiteAdapter openToWrite() throws android.database.SQLException {
sqLiteHelper = new SQLiteHelper(context, MYDATABASE_NAME, null, MYDATABASE_VERSION);
sqLiteDatabase = sqLiteHelper.getWritableDatabase();
return this;
}

public void close(){
sqLiteHelper.close();
}

public long insert(String content1, String content2){

ContentValues contentValues = new ContentValues();
contentValues.put(KEY_CONTENT1, content1);
contentValues.put(KEY_CONTENT2, content2);
return sqLiteDatabase.insert(MYDATABASE_TABLE, null, contentValues);
}

public int deleteAll(){
return sqLiteDatabase.delete(MYDATABASE_TABLE, null, null);
}

public void delete_byID(int id){
sqLiteDatabase.delete(MYDATABASE_TABLE, KEY_ID+"="+id, null);
}

public Cursor queueAll(){
String[] columns = new String[]{KEY_ID, KEY_CONTENT1, KEY_CONTENT2};
Cursor cursor = sqLiteDatabase.query(MYDATABASE_TABLE, columns,
null, null, null, null, null);

return cursor;
}

public class SQLiteHelper extends SQLiteOpenHelper {

public SQLiteHelper(Context context, String name,
CursorFactory factory, int version) {
super(context, name, factory, version);
}

@Override
public void onCreate(SQLiteDatabase db) {
// TODO Auto-generated method stub
db.execSQL(SCRIPT_CREATE_DATABASE);
}

@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
// TODO Auto-generated method stub

}

}

}




<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
<TextView
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="@string/hello"
    />
<TextView
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="Enter content of column 1"
    />
<EditText
    android:id="@+id/content1"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    />
<TextView
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="Enter content of column 2"
    />
<EditText
    android:id="@+id/content2"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    />
<Button
    android:id="@+id/add"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="Add"
    />
<Button
    android:id="@+id/deleteall"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="Delete All"
    />
<ListView
android:id="@+id/contentlist"
android:layout_width="fill_parent"
android:layout_height="fill_parent"/>
</LinearLayout>




<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="wrap_content">
<LinearLayout
    android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="wrap_content">
<TextView
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:padding="2dip"
android:text="#"/>
<TextView
android:id="@+id/id"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:padding="2dip"
android:paddingRight="10dip"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:padding="2dip"
android:paddingRight="10dip"
android:text="-" />
<TextView
android:id="@+id/text1"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:padding="2dip"/>
</LinearLayout>
<TextView
android:id="@+id/text2"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:padding="2dip"/>
</LinearLayout>