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ユーザがテキストと画像を保存する日記を作成しようとしています。 私はテキスト（タイトルと本文）を保存することができましたが、私は初心者ですので、画像を保存する方法がわかりません。これは私のコードで、私は、コード内で画像を取得しようとしましたノートを作成しましたが、私はそれを動作させる方法を知らないSQLiteデータベースに画像を保存する
ActivityDiaryEdit.java：
public class ActivityDiaryEdit extends Activity {
private static final int RESULT_LOAD_IMAGE =1;
private EditText mTitleText;
private EditText mBodyText;
private ImageView mImage; //image
private Long mRowId;
private DiaryDbAdapter mDbHelper;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mDbHelper = new DiaryDbAdapter(this);
mDbHelper.open();
setContentView(R.layout.diary_edit);
mTitleText = (EditText) findViewById(R.id.title);
mBodyText = (EditText) findViewById(R.id.body);
mImage = (ImageView) findViewById(R.id.imageView1); //image
Button confirmButton = (Button) findViewById(R.id.confirm);
mRowId = null;
Bundle extras = getIntent().getExtras();
if (extras != null) {
String title = extras.getString(DiaryDbAdapter.KEY_TITLE);
String body = extras.getString(DiaryDbAdapter.KEY_BODY);
mRowId = extras.getLong(DiaryDbAdapter.KEY_ROWID);
if (title != null) {
mTitleText.setText(title);
}
if (body != null) {
mBodyText.setText(body);
}
}
confirmButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
String title = mTitleText.getText().toString();
String body = mBodyText.getText().toString();
Bitmap image =((BitmapDrawable)mImage.getDrawable()).getBitmap(); //image
if (mRowId != null) {
mDbHelper.updateDiary(mRowId, title, body , image); //add image?
} else
mDbHelper.createDiary(title, body , image);
Intent mIntent = new Intent();
setResult(RESULT_OK, mIntent);
finish();
}
});
}
public void onClick(View v){
switch(v.getId()) {
case R.id.imageView1: //when the imageup is clicked the following will happen
Intent galleryIntent = new Intent (Intent.ACTION_PICK,MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(galleryIntent,RESULT_LOAD_IMAGE);
break;
case R.id.confirm:
Bitmap image =((BitmapDrawable)mImage.getDrawable()).getBitmap(); //holds the image
break;
}
}
@Override
protected void onActivityResult(int requestCode , int resultCode, Intent data){
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == RESULT_LOAD_IMAGE && resultCode == RESULT_OK && data !=null){
Bitmap bmp =(Bitmap) data.getExtras().get("data");
mImage.setImageBitmap(bmp);
mImage.requestFocus();
ByteArrayOutputStream boas = new ByteArrayOutputStream();
bmp.compress(Bitmap.CompressFormat.JPEG, 100, boas);
byte [] b =boas.toByteArray();
String encodedImageString = Base64.encodeToString(b, Base64.DEFAULT);
byte[] bytarray= Base64.decode(encodedImageString, Base64.DEFAULT);
Bitmap bmimage = BitmapFactory.decodeByteArray(bytarray, 0,
bytarray.length);
Uri selectedImage =data.getData();
mImage.setImageURI(selectedImage);
}
}
private class UploadImage extends AsyncTask<Void,Void ,Void >{
Bitmap image;
String name;
public UploadImage(Bitmap image,String name){
this.image = image;
this.name = name;
}
@Override
protected Void doInBackground(Void... params) {
// TODO Auto-generated method stub
ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
image.compress(Bitmap.CompressFormat.JPEG, 100, byteArrayOutputStream);
String encodedImage = Base64.encodeToString(byteArrayOutputStream.toByteArray(),Base64.DEFAULT); //encoding the image-String representation of the image
ArrayList<NameValuePair>dataToSend = new ArrayList<>();
dataToSend.add(new BasicNameValuePair("image", encodedImage));
dataToSend.add(new BasicNameValuePair("name",name));
return null;
}
}
DiaryDbAdapter.java：
class DiaryDbAdapter {
public static final String KEY_TITLE = "title";
public static final String KEY_BODY = "body";
public static final String KEY_ROWID = "_id";
public static final String KEY_CREATED = "created";
public static final String KEY_IMAGE = "image"; //image
private static final String TABLE_CONTACTS = "contacts";
private static final String TAG = "DiaryDbAdapter";
private DatabaseHelper mDbHelper;
private SQLiteDatabase mDb;
private static final String DATABASE_CREATE = "create table diary (_id integer primary key autoincrement, "
+ "title text not null, body text not null, created text not null);";
private static final String DATABASE_NAME = "database";
private static final String DATABASE_TABLE = "diary";
private static final int DATABASE_VERSION = 1;
private final Context mCtx;
private static class DatabaseHelper extends SQLiteOpenHelper {
DatabaseHelper(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
@Override
public void onCreate(SQLiteDatabase db) {
db.execSQL(DATABASE_CREATE);
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
db.execSQL("DROP TABLE IF EXISTS diary");
onCreate(db);
}
}
public DiaryDbAdapter(Context ctx) {
this.mCtx = ctx;
}
public DiaryDbAdapter open() throws SQLException {
mDbHelper = new DatabaseHelper(mCtx);
mDb = mDbHelper.getWritableDatabase();
return this;
}
public void closeclose() {
mDbHelper.close();
}
public void onCreate(SQLiteDatabase db) {
String CREATE_CONTACTS_TABLE = "CREATE TABLE " + TABLE_CONTACTS + "("
+ KEY_IMAGE + " BLOB" + ")";
db.execSQL(CREATE_CONTACTS_TABLE);
} //for image
public long createDiary(String title, String body , Bitmap image) {
ContentValues initialValues = new ContentValues();
initialValues.put(KEY_TITLE, title);
initialValues.put(KEY_BODY, body);
// initialValues.put(KEY_IMAGE, image); //how to put image?
Calendar calendar = Calendar.getInstance();
String created = calendar.get(Calendar.YEAR) + ""
+ calendar.get(Calendar.MONTH) + ""
+ calendar.get(Calendar.DAY_OF_MONTH) + ""
+ calendar.get(Calendar.HOUR_OF_DAY) + ""
+ calendar.get(Calendar.MINUTE) + "";
initialValues.put(KEY_CREATED, created);
return mDb.insert(DATABASE_TABLE, null, initialValues);
}
public boolean deleteDiary(long rowId) {
return mDb.delete(DATABASE_TABLE, KEY_ROWID + "=" + rowId, null) > 0;
}
public Cursor getAllNotes() {
return mDb.query(DATABASE_TABLE, new String[] { KEY_ROWID, KEY_TITLE,
KEY_BODY, KEY_CREATED ,KEY_IMAGE}, null, null, null, null, null);
}
public Cursor getDiary(long rowId) throws SQLException {
Cursor mCursor =
mDb.query(true, DATABASE_TABLE, new String[] { KEY_ROWID, KEY_TITLE,
KEY_BODY, KEY_CREATED , KEY_IMAGE }, KEY_ROWID + "=" + rowId, null, null,
null, null, null);
if (mCursor != null) {
mCursor.moveToFirst();
}
return mCursor;
}
public boolean updateDiary(long rowId, String title, String body , Bitmap image) {
ContentValues args = new ContentValues();
args.put(KEY_TITLE, title);
args.put(KEY_BODY, body);
//args.put(KEY_IMAGE, image); //how to put image?
Calendar calendar = Calendar.getInstance();
String created = calendar.get(Calendar.YEAR) + ""
+ calendar.get(Calendar.MONTH) + ""
+ calendar.get(Calendar.DAY_OF_MONTH) + ""
+ calendar.get(Calendar.HOUR_OF_DAY) + ""
+ calendar.get(Calendar.MINUTE) + "";
args.put(KEY_CREATED, created);
return mDb.update(DATABASE_TABLE, args, KEY_ROWID + "=" + rowId, null) > 0;
}
}
MainActivity.java：
public class MainActivity extends ListActivity {
private static final int ACTIVITY_CREATE = 0;
private static final int ACTIVITY_EDIT = 1;
private static final int INSERT_ID = Menu.FIRST;
private static final int DELETE_ID = Menu.FIRST + 1;
private DiaryDbAdapter mDbHelper;
private Cursor mDiaryCursor;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.diary_list);
mDbHelper = new DiaryDbAdapter(this);
mDbHelper.open();
renderListView();
}
private void renderListView() {
mDiaryCursor = mDbHelper.getAllNotes();
startManagingCursor(mDiaryCursor);
String[] from = new String[] { DiaryDbAdapter.KEY_TITLE,
DiaryDbAdapter.KEY_CREATED , }; //DiaryAdapter KEY_IMAGE ??
int[] to = new int[] { R.id.text1, R.id.created , R.id.imageView1 };
SimpleCursorAdapter notes = new SimpleCursorAdapter(this,
R.layout.diary_now, mDiaryCursor, from, to);
setListAdapter(notes);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
super.onCreateOptionsMenu(menu);
menu.add(0, INSERT_ID, 0, R.string.menu_insert);
menu.add(0, DELETE_ID, 0, R.string.menu_delete);
return true;
}
@Override
public boolean onMenuItemSelected(int featureId, MenuItem item) {
switch (item.getItemId()) {
case INSERT_ID:
createDiary();
return true;
case DELETE_ID:
mDbHelper.deleteDiary(getListView().getSelectedItemId());
renderListView();
return true;
}
return super.onMenuItemSelected(featureId, item);
}
private void createDiary() {
Intent i = new Intent(this, ActivityDiaryEdit.class);
startActivityForResult(i, ACTIVITY_CREATE);
}
@Override
protected void onListItemClick(ListView l, View v, int position, long id) { // from activity edit and diaryDb
super.onListItemClick(l, v, position, id);
Cursor c = mDiaryCursor;
c.moveToPosition(position);
Intent i = new Intent(this, ActivityDiaryEdit.class);
i.putExtra(DiaryDbAdapter.KEY_ROWID, id);
i.putExtra(DiaryDbAdapter.KEY_TITLE, c.getString(c
.getColumnIndexOrThrow(DiaryDbAdapter.KEY_TITLE)));
i.putExtra(DiaryDbAdapter.KEY_BODY, c.getString(c
.getColumnIndexOrThrow(DiaryDbAdapter.KEY_BODY)));
startActivityForResult(i, ACTIVITY_EDIT);
// i.putExtra(DiaryAdapter.KEY_IMAGE, c.getString(c
// .getColumnIndexOrThrow(DiaryAdapter.KEY_IMAGE))); image??
}
@Override
protected void onActivityResult(int requestCode, int resultCode,
Intent intent) {
super.onActivityResult(requestCode, resultCode, intent);
renderListView();
}
}
私のコードで言うことをどのように適用するかわかりません。 – nanay