我希望能够在SQLite中存储一个drawables INT值（ResourceID），然后能够从数据库中提取它并将其转换为drawable以便在listview中查看。
以下snippit生成2个值，ResID部分是一个int值，我希望能够将其转换回另一个活动中的drawable。\
Drawable myDrawable = getResources().getDrawable(
images[position]);
Log.e("DRAWABLE", "DrawableId 1: " + myDrawable);
int resId = images[position];
Log.e("DRAWABLE", "DrawableId 2: " + resId);
如何将ResID转换为drawable？如果可能
PicturePickerFragment
public class PicturePickerFragment extends DialogFragment {
ListView listView;
ArrayList<RowItem> rowItems = new ArrayList<RowItem>();
// attach adapter to a list view
// A String[] array that will hold the names of the items.
public static final String[] descriptions = { "Baby", "Baking",
"Barbershop", "Camping", "Conference Call", "Funeral", "Gambling",
"Gardening", "Halloweeen", "Medicine", "Meeting", "Poker",
"Christmas", "Wedding" };
public static final Integer[] images = { R.drawable.baby,
R.drawable.baking, R.drawable.barbershop, R.drawable.camping,
R.drawable.conferencecall, R.drawable.funeral, R.drawable.gambling,
R.drawable.gardening, R.drawable.halloween, R.drawable.medicine,
R.drawable.meeting, R.drawable.poker, R.drawable.santa,
R.drawable.wedding };
Button btn_pic;
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
LayoutInflater inflater = getActivity().getLayoutInflater();
View convertView = (View) inflater.inflate(R.layout.dialog_view, null);
// defining the alertdialog
AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
builder.setView(convertView);
builder.setTitle(R.string.event_type);
builder.setPositiveButton(R.string.select_picture,
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// call the method on the parent activity when
// user click the positive button
}
});
// populating the array list
for (int i = 0; i < descriptions.length; i++) {
RowItem item = new RowItem(images[i], descriptions[i]);
rowItems.add(item);
}
// defining listview and using array adapter
listView = (ListView) convertView.findViewById(R.id.listViewFragment2);
DrawableAdapter adapter = new DrawableAdapter(getActivity(), rowItems);
listView.setAdapter(adapter);
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, final View view,
int position, long id) {
// final int item = images[position];
Drawable myDrawable = getResources().getDrawable(
images[position]);
Log.e("DRAWABLE", "DrawableId 1: " + myDrawable);
int resId = images[position];
Log.e("DRAWABLE", "DrawableId 2: " + resId);
Button b = (Button) getActivity()
.findViewById(R.id.btn_picture);
b.setCompoundDrawablesWithIntrinsicBounds(null, myDrawable,
null, null);
}
});
adapter.addAll(rowItems);
return builder.create();
}
}
CreateActivity
public class CreateActivity extends Activity implements OnClickListener {
EditText etTitle;
Button btDate;
Button btTime;
Button btPic;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_create);
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
//onclicklistener
findViewById(R.id.btn_confirm).setOnClickListener(this);
findViewById(R.id.btn_back).setOnClickListener(this);
etTitle = (EditText) findViewById(R.id.editTextTitle);
btDate = (Button) findViewById(R.id.btn_date);
btTime = (Button) findViewById(R.id.btn_time);
btPic = (Button) findViewById(R.id.btn_picture);
}
// Will be called via the onClick attribute
// of the buttons in main.xml
public void onClick(View view) {
switch (view.getId()) {
case R.id.btn_confirm:
String title = etTitle.getText().toString();
String time = btTime.getText().toString();
String date = btDate.getText().toString();
Drawable drawable = btPic.getCompoundDrawables()[1];
int
Log.e("DRAWABLE", "DrawableId 3: " + drawable);
//Bitmap bitmap = ((BitmapDrawable)drawable).getBitmap();
Log.e("LOG", title);
Log.e("LOG", time);
Log.e("LOG", date);
Bundle newBundle = new Bundle();
newBundle.putString("TITLE", title);
newBundle.putString("TIME", time);
newBundle.putString("DATE", date);
//newBundle.putInt
//Trying to pass a drawable from one activity to another
//newBundle.putParcelable("DRAWABLE", bitmap);
Intent intent = new Intent(this, MainActivity.class);
intent.putExtras(newBundle);
setResult(RESULT_OK, intent);
finish();
break;
case R.id.btn_back:
finish();
break;
}
}
public void showTimePickerDialog(View v) {
DialogFragment newFragment = new TimePickerFragment();
newFragment.show(getFragmentManager(), "timePicker");
}
public void showDatePickerDialog(View v) {
DialogFragment newFragment = new DatePickerFragment();
newFragment.show(getFragmentManager(), "datePicker");
}
public void showPicturePickerDialog(View v) {
DialogFragment newFragment = new PicturePickerFragment();
newFragment.show(getFragmentManager(), "picturePicker");
}
}
主要活动
public class MainActivity extends FragmentActivity implements OnClickListener {
ListView listView;
int lastIndex = -1;
ArrayList<Event> lstEvents = new ArrayList<Event>();
// detail view
TextView tvTitle, tvTime, tvDate;
ImageView ivPic;
View vw_master;
boolean _isBack = true;
ImageButton add;
String title;
String date;
String time;
int resId;
static final int PICK_CONTACT_REQUEST = 0;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
// // get detail controls
tvTitle = (TextView) findViewById(R.id.textViewTitle);
tvDate = (TextView) findViewById(R.id.textViewDate);
tvTime = (TextView) findViewById(R.id.textViewTime);
ivPic = (ImageView) findViewById(R.id.imageView1);
add = (ImageButton) findViewById(R.id.add);
add.setOnClickListener(this);
/////////////////////////////////LISTVIEW////////////////////////////////////////
// Create the adapter to convert the array to views
EventAdapter adapter = new EventAdapter(this, lstEvents);
// attach adapter to a list view
listView = (ListView) findViewById(R.id.listViewFragment);
listView.setAdapter(adapter);
/////////////////////////////////LISTVIEW////////////////////////////////////////
// /////////////////////////////DATABASE/////////////////////////////////////////////
DatabaseHandler db = new DatabaseHandler(this);
// /////////////////////////////DATABASE/////////////////////////////////////////////
List<Event> events = db.getAllContacts();
adapter.addAll(events);
adapter.notifyDataSetChanged();
}
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
switch (v.getId()) {
case R.id.add:
Intent intent = new Intent(this, CreateActivity.class);
startActivityForResult(intent, 100);
break;
}
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
// /////////////////////////////DATABASE/////////////////////////////////////////////
DatabaseHandler db = new DatabaseHandler(this);
// /////////////////////////////DATABASE/////////////////////////////////////////////
// Create the adapter to convert the array to views
EventAdapter adapter = new EventAdapter(this, lstEvents);
// attach adapter to a list view
listView = (ListView) findViewById(R.id.listViewFragment);
listView.setAdapter(adapter);
if (requestCode == 100) {
if (resultCode == RESULT_OK) {
Bundle b = data.getExtras();
title = b.getString("TITLE");
time = b.getString("TIME");
date = b.getString("DATE");
// retrieving bitmap from CreateActivity
int drawable = b.getInt("DRAWABLE");
//Bitmap bitmap = (Bitmap) b.getParcelable("DRAWABLE");
// converting from bitmap to drawable
//Drawable drawable = new BitmapDrawable(getResources(), bitmap);
// Event newEvent = new Event();
// newEvent.set_date(date);
// newEvent.set_title(title);
// newEvent.set_time(time);
// set drawable
// newEvent.set_drawable(drawable);
// lstEvents.add(newEvent);
// adapter.addAll(lstEvents);
// adapter.notifyDataSetChanged();
///////////////////////////////DATABASE/////////////////////////////////////////////
/**
* CRUD OPERATIONS
*/
Log.e("Insert: ", "Inserting ..");
db.addEvent(new Event(0, title, time, date, drawable));
// Reading all contacts
Log.e("Reading: ", "Reading all contacts..");
// List<Event> events = db.getAllContacts();
List<Event> events = db.getAllContacts();
adapter.addAll(events);
adapter.notifyDataSetChanged();
//logging all events
for (Event ev : events) {
String log = "Id: " + ev.get_Id() + " ,Title: "
+ ev.get_title() + " ,Date: " + ev.get_date();
// Writing Contacts to log
Log.e("Name: ", log);
}
///////////////////////////////DATABASE/////////////////////////////////////////////
}
}
}
}
答案 0 :(得分：0)
我认为存储Resource Id不是正确的方法，因为Id's对每种类型的资源只有unique。因此，对于两种不同的资源，可能存在相同的Id。
最好的方法是将资源的文件名存储为字符串。
您可以使用Resource Identifier
int resourceId = getResources().getIdentifier("file_name", "drawable", getPackageName());