Mega Code Archive
More than one Activity
<![CDATA[
package apt.tutorial;
import android.app.Activity;
import android.database.Cursor;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.RadioGroup;
import android.widget.TextView;
public class DetailForm extends Activity {
EditText name=null;
EditText address=null;
EditText notes=null;
RadioGroup types=null;
RestaurantHelper helper=null;
String restaurantId=null;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.detail_form);
helper=new RestaurantHelper(this);
name=(EditText)findViewById(R.id.name);
address=(EditText)findViewById(R.id.addr);
notes=(EditText)findViewById(R.id.notes);
types=(RadioGroup)findViewById(R.id.types);
Button save=(Button)findViewById(R.id.save);
save.setOnClickListener(onSave);
restaurantId=getIntent().getStringExtra(LunchList.ID_EXTRA);
if (restaurantId!=null) {
load();
}
}
@Override
public void onDestroy() {
super.onDestroy();
helper.close();
}
private void load() {
Cursor c=helper.getById(restaurantId);
c.moveToFirst();
name.setText(helper.getName(c));
address.setText(helper.getAddress(c));
notes.setText(helper.getNotes(c));
if (helper.getType(c).equals("sit_down")) {
types.check(R.id.sit_down);
}
else if (helper.getType(c).equals("take_out")) {
types.check(R.id.take_out);
}
else {
types.check(R.id.delivery);
}
c.close();
}
private View.OnClickListener onSave=new View.OnClickListener() {
public void onClick(View v) {
String type=null;
switch (types.getCheckedRadioButtonId()) {
case R.id.sit_down:
type="sit_down";
break;
case R.id.take_out:
type="take_out";
break;
case R.id.delivery:
type="delivery";
break;
}
if (restaurantId==null) {
helper.insert(name.getText().toString(),
address.getText().toString(), type,
notes.getText().toString());
}
else {
helper.update(restaurantId, name.getText().toString(),
address.getText().toString(), type,
notes.getText().toString());
}
finish();
}
};
}
//12-Activities\LunchList\src\apt\tutorial\LunchList.java
package apt.tutorial;
import android.app.ListActivity;
import android.content.Context;
import android.content.Intent;
import android.database.Cursor;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.view.LayoutInflater;
import android.widget.AdapterView;
import android.widget.CursorAdapter;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;
public class LunchList extends ListActivity {
public final static String ID_EXTRA="apt.tutorial._ID";
Cursor model=null;
RestaurantAdapter adapter=null;
RestaurantHelper helper=null;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
helper=new RestaurantHelper(this);
model=helper.getAll();
startManagingCursor(model);
adapter=new RestaurantAdapter(model);
setListAdapter(adapter);
}
@Override
public void onDestroy() {
super.onDestroy();
helper.close();
}
@Override
public void onListItemClick(ListView list, View view,
int position, long id) {
Intent i=new Intent(LunchList.this, DetailForm.class);
i.putExtra(ID_EXTRA, String.valueOf(id));
startActivity(i);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
new MenuInflater(this).inflate(R.menu.option, menu);
return(super.onCreateOptionsMenu(menu));
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
if (item.getItemId()==R.id.add) {
startActivity(new Intent(LunchList.this, DetailForm.class));
return(true);
}
return(super.onOptionsItemSelected(item));
}
class RestaurantAdapter extends CursorAdapter {
RestaurantAdapter(Cursor c) {
super(LunchList.this, c);
}
@Override
public void bindView(View row, Context ctxt,
Cursor c) {
RestaurantHolder holder=(RestaurantHolder)row.getTag();
holder.populateFrom(c, helper);
}
@Override
public View newView(Context ctxt, Cursor c,
ViewGroup parent) {
LayoutInflater inflater=getLayoutInflater();
View row=inflater.inflate(R.layout.row, parent, false);
RestaurantHolder holder=new RestaurantHolder(row);
row.setTag(holder);
return(row);
}
}
static class RestaurantHolder {
private TextView name=null;
private TextView address=null;
private ImageView icon=null;
RestaurantHolder(View row) {
name=(TextView)row.findViewById(R.id.title);
address=(TextView)row.findViewById(R.id.address);
icon=(ImageView)row.findViewById(R.id.icon);
}
void populateFrom(Cursor c, RestaurantHelper helper) {
name.setText(helper.getName(c));
address.setText(helper.getAddress(c));
if (helper.getType(c).equals("sit_down")) {
icon.setImageResource(R.drawable.ball_red);
}
else if (helper.getType(c).equals("take_out")) {
icon.setImageResource(R.drawable.ball_yellow);
}
else {
icon.setImageResource(R.drawable.ball_green);
}
}
}
}
//12-Activities\LunchList\src\apt\tutorial\RestaurantHelper.java
package apt.tutorial;
import android.content.Context;
import android.content.ContentValues;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.SQLiteOpenHelper;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteQueryBuilder;
class RestaurantHelper extends SQLiteOpenHelper {
private static final String DATABASE_NAME="lunchlist.db";
private static final int SCHEMA_VERSION=1;
public RestaurantHelper(Context context) {
super(context, DATABASE_NAME, null, SCHEMA_VERSION);
}
@Override
public void onCreate(SQLiteDatabase db) {
db.execSQL("CREATE TABLE restaurants (_id INTEGER PRIMARY KEY AUTOINCREMENT, name TEXT, address TEXT, type TEXT, notes TEXT);");
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
// no-op, since will not be called until 2nd schema
// version exists
}
public Cursor getAll() {
return(getReadableDatabase()
.rawQuery("SELECT _id, name, address, type, notes FROM restaurants ORDER BY name",
null));
}
public Cursor getById(String id) {
String[] args={id};
return(getReadableDatabase()
.rawQuery("SELECT _id, name, address, type, notes FROM restaurants WHERE _ID=?",
args));
}
public void insert(String name, String address,
String type, String notes) {
ContentValues cv=new ContentValues();
cv.put("name", name);
cv.put("address", address);
cv.put("type", type);
cv.put("notes", notes);
getWritableDatabase().insert("restaurants", "name", cv);
}
public void update(String id, String name, String address,
String type, String notes) {
ContentValues cv=new ContentValues();
String[] args={id};
cv.put("name", name);
cv.put("address", address);
cv.put("type", type);
cv.put("notes", notes);
getWritableDatabase().update("restaurants", cv, "_ID=?",
args);
}
public String getName(Cursor c) {
return(c.getString(1));
}
public String getAddress(Cursor c) {
return(c.getString(2));
}
public String getType(Cursor c) {
return(c.getString(3));
}
public String getNotes(Cursor c) {
return(c.getString(4));
}
}
//12-Activities\LunchList\res\values\strings.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<string name="app_name">LunchList</string>
</resources>
//12-Activities\LunchList\res\menu\option.xml
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">
<item android:id="@+id/add"
android:title="Add"
android:icon="@drawable/ic_menu_add"
/>
</menu>
//12-Activities\LunchList\res\layout\detail_form.xml
<TableLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:stretchColumns="1"
>
<TableRow>
<TextView android:text="Name:" />
<EditText android:id="@+id/name" />
</TableRow>
<TableRow>
<TextView android:text="Address:" />
<EditText android:id="@+id/addr" />
</TableRow>
<TableRow>
<TextView android:text="Type:" />
<RadioGroup android:id="@+id/types">
<RadioButton android:id="@+id/take_out"
android:text="Take-Out"
/>
<RadioButton android:id="@+id/sit_down"
android:text="Sit-Down"
/>
<RadioButton android:id="@+id/delivery"
android:text="Delivery"
/>
</RadioGroup>
</TableRow>
<TableRow>
<TextView android:text="Notes:" />
<EditText android:id="@+id/notes"
android:singleLine="false"
android:gravity="top"
android:lines="2"
android:scrollHorizontally="false"
android:maxLines="2"
android:maxWidth="200sp"
/>
</TableRow>
<Button android:id="@+id/save"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Save"
/>
</TableLayout>
//12-Activities\LunchList\res\layout\main.xml
<?xml version="1.0" encoding="utf-8"?>
<ListView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@android:id/list"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
/>
//12-Activities\LunchList\res\layout\row.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:padding="4dip"
>
<ImageView android:id="@+id/icon"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:layout_alignParentTop="true"
android:layout_alignParentBottom="true"
android:layout_marginRight="4dip"
/>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
>
<TextView android:id="@+id/title"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="center_vertical"
android:textStyle="bold"
android:singleLine="true"
android:ellipsize="end"
/>
<TextView android:id="@+id/address"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="center_vertical"
android:singleLine="true"
android:ellipsize="end"
/>
</LinearLayout>
</LinearLayout>
]]>