如何在SQLite（Android）中存储可绘制/位图

我想通过CreateActivity中的Bundle传递一个Drawable的Int值。根据这个Int值（资源ID），我想使用它创建一个存储在SQLLITE数据库中的事件对象。当程序生成listview时，它应该能够使用此Int值将其关联的Drawable分配给listview的一部分

**我应该怎么做才能在SQLite DB中存储一个Drawable，或者至少在DB中存储INT值**

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

            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/////////////////////////////////////////////
        }

    }
}
}

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];
        Log.e("DRAWABLE", "DrawableId" + 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);

        //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");
}

}

---

不建议在数据库中存储图像。必须将图像存储在内部或外部内存中，并将图像的引用存储在数据库中

// GET INT VALUE FROM RESOURCE
int home = R.drawable.home;

// SET IMAGE RESOURCE
img.setImageResource(home);

---

如果要将图像放在项目的内部内存中，请将图像放在资产文件夹中，并将其名称保存在sqlite中，然后使用以下代码显示图像：

 String imageUrl = imgArraList.get(position).getUrl();
/*imageUrl variable will contain image name that should be available in assets folder.*/
    Bitmap bitmap = BitmapFactory.decodeStream(getAssets().open(imageUrl));
    touch.setImageBitmap(bitmap, null, 1.0f, 2.0f);

---

资源是否已存储在内存中？它们位于drawable文件夹内，因此我将如何获取对图像的引用？如果图像位于

/drawable

文件夹内，则

R.drawable.image\u name

实际上是一个整数。将此整数存储到DB中，下次重新使用。如何将整数转换回可绘制的？为此，我将存储

R.drawable.home

，还是只存储

home

？另外，这对字符串资源也有效吗？@VishnuHaridas这个整数一致吗？当重新编译应用程序或添加其他图像时，它不会改变吗？

// GET INT VALUE FROM RESOURCE
int home = R.drawable.home;

// SET IMAGE RESOURCE
img.setImageResource(home);

 String imageUrl = imgArraList.get(position).getUrl();
/*imageUrl variable will contain image name that should be available in assets folder.*/
    Bitmap bitmap = BitmapFactory.decodeStream(getAssets().open(imageUrl));
    touch.setImageBitmap(bitmap, null, 1.0f, 2.0f);