Pengaturan.java

package id.dismut.bmi;

import android.app.ActionBar;
import android.app.Activity;
import android.app.Dialog;
import android.content.Intent;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.graphics.Color;
import android.graphics.drawable.ColorDrawable;
import android.os.Bundle;
import android.view.MenuItem;
import android.view.View;
import android.view.Window;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

public class Pengaturan extends Activity {
	Button btnNama,btnUsername,btnPassword,btnData,btnOk,btnCancel;
	EditText txtNama;
	String nama;
	protected Cursor cursor;
	DataHelper dbHelper;
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_pengaturan);

		ActionBar actionBar = getActionBar();
        actionBar.setBackgroundDrawable(new ColorDrawable(Color.parseColor("#0091ea")));
        getActionBar().setDisplayHomeAsUpEnabled(true);

        dbHelper = new DataHelper(this);
        final SQLiteDatabase db = dbHelper.getReadableDatabase();
		btnNama = (Button) findViewById(R.id.btnNama);
		btnUsername = (Button) findViewById(R.id.btnUsername);
		btnPassword = (Button) findViewById(R.id.btnPassword);
		btnData		= (Button) findViewById(R.id.btnData);

		btnNama.setOnClickListener(new View.OnClickListener() {

			@Override
			public void onClick(View v) {
				final Dialog dialog = new Dialog(Pengaturan.this);
			 	dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
				dialog.setContentView(R.layout.dialog_nama);

				txtNama = (EditText) dialog.findViewById(R.id.txtNama);
				btnOk = (Button) dialog.findViewById(R.id.button2);
				btnCancel = (Button) dialog.findViewById(R.id.button1);
				nama = txtNama.getText().toString();

				btnOk.setOnClickListener(new View.OnClickListener() {

					@Override
					public void onClick(View v) {
						String sql = "UPDATE user SET nama = '"+nama+"' WHERE username = (SELECT username FROM session)";
						try {
							db.execSQL(sql);
							Toast.makeText(getBaseContext(), "Berhasil mengubah "+nama+" ll", Toast.LENGTH_SHORT).show();
							dialog.dismiss();
						}
						catch (SQLException e) {
							Toast.makeText(getBaseContext(), "Gagal mengubah", Toast.LENGTH_SHORT).show();
						}
					}
				});

				dialog.show();

			}
		});
		btnUsername.setOnClickListener(new View.OnClickListener() {

			@Override
			public void onClick(View v) {
				final Dialog dialog = new Dialog(Pengaturan.this);
			 	dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
				dialog.setContentView(R.layout.dialog_username);

				EditText txtUsername = (EditText) dialog.findViewById(R.id.txtUsername);
				Button btnOk = (Button) dialog.findViewById(R.id.button2);
				Button btnCancel = (Button) dialog.findViewById(R.id.button1);

				dialog.show();

			}
		});
		btnPassword.setOnClickListener(new View.OnClickListener() {

			@Override
			public void onClick(View v) {
				final Dialog dialog = new Dialog(Pengaturan.this);
			 	dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
				dialog.setContentView(R.layout.dialog_password);

				EditText txtPasswordLama = (EditText) dialog.findViewById(R.id.txtUsername);
				EditText txtPasswordBaru = (EditText) dialog.findViewById(R.id.txtPasswordBaru);
				EditText txtPasswordBaruUlang = (EditText) dialog.findViewById(R.id.txtPasswordBaru);
				Button btnOk = (Button) dialog.findViewById(R.id.button2);
				Button btnCancel = (Button) dialog.findViewById(R.id.button1);

				dialog.show();

			}
		});
		btnData.setOnClickListener(new View.OnClickListener() {

			@Override
			public void onClick(View v) {
				final Dialog dialog = new Dialog(Pengaturan.this);
			 	dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
				dialog.setContentView(R.layout.dialog_confirm);

				TextView judul = (TextView) dialog.findViewById(R.id.txtJudul);
				TextView isi = (TextView) dialog.findViewById(R.id.txtIsi);
				Button btnOk = (Button) dialog.findViewById(R.id.button2);
				Button btnCancel = (Button) dialog.findViewById(R.id.button1);

				judul.setText("Konfirmasi");
				isi.setText("Apakah anda yakin akan menghapus semua data?");
				dialog.show();

			}
		});
	}

	@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();
		switch(id) {
		case android.R.id.home :
			this.finish();
			Intent i = new Intent(Pengaturan.this, MainActivity.class);
			startActivity(i);
			return true;
		}
		return super.onOptionsItemSelected(item);
	}
	@Override
	public void onBackPressed() {
		this.finish();
		Intent i = new Intent(Pengaturan.this, MainActivity.class);
		startActivity(i);
		super.onBackPressed();
	}
}