我将一些字段插入到sqlite中，并且在更新同一字段时插入工作正常，值正在检索到edittext但没有使用upadte按钮进行更新，请给我完美的解决方案及其显示错误，例如没有列。他们插入和删除没有问题，但更新没有问题，请给我解决方案。
提前谢谢
public class DatabaseEvent extends SQLiteOpenHelper {
public DatabaseEvent(Context context,
String name,
SQLiteDatabase.CursorFactory factory,
int version) {
super(context, name, factory, version);
}
public void queryData(String sql){
SQLiteDatabase database=getWritableDatabase();
database.execSQL(sql);
}
//insertData
public void inserteacher(String name,String eventname,String eventorganization,String eventdays,String eventstart, byte[] image){
SQLiteDatabase database=getWritableDatabase();
String sql="INSERT INTO PRINCIPALS VALUES (NULL,?, ?, ?, ?, ?, ?)";
SQLiteStatement statement=database.compileStatement(sql);
statement.clearBindings();
statement.bindString(1,name);
statement.bindString(2,eventname);
statement.bindString(3,eventorganization);
statement.bindString(4,eventdays);
statement.bindString(5,eventstart);
statement.bindBlob(6,image);
statement.executeInsert();
}
public Cursor getData(String sql){
SQLiteDatabase database=getReadableDatabase();
return database.rawQuery(sql,null);
}
//updatedata
public void updateData(String name,String eventname,String eventorganization,String eventdays,String eventstart, byte[] image, int id){
SQLiteDatabase database=getWritableDatabase();
//query to upadte
String sql = "UPDATE PRINCIPALS SET name=?, eventname=?, eventorganization=?, eventdays=?, eventstart=?, image=? WHERE id=? ";
SQLiteStatement statement=database.compileStatement(sql);
statement.bindString(1,name);
statement.bindString(2,eventname);
statement.bindString(3,eventorganization);
statement.bindString(4,eventdays);
statement.bindString(5,eventstart);
statement.bindBlob(6,image);
statement.bindDouble(7,(double)id);
statement.execute();
database.close();
}
//deletedata
public void deleteData(int id){
SQLiteDatabase database=getWritableDatabase();
//query to delete record using id
String sql= "DELETE FROM PRINCIPALS WHERE id=?";
SQLiteStatement statement=database.compileStatement(sql);
statement.clearBindings();
statement.bindDouble(1,(double) id);
statement.execute();
database.close();
}
@Override
public void onCreate(SQLiteDatabase database) {
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
}
}
mListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, final int position, long id) {
//alert dialog to display options of update and delete
CharSequence[] items = {"Update", "Delete"};
AlertDialog.Builder dialog = new AlertDialog.Builder(PrincipalEventListActivity.this);
dialog.setTitle("Choose an action");
dialog.setItems(items, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
if (i == 0) {
//upadte
Cursor c = PrincipalEventActivity.databaseEvent.getData("SELECT id FROM PRINCIPALS ");
ArrayList<Integer> arrID = new ArrayList<>();
while (c.moveToNext()) {
arrID.add(c.getInt(0));
}
//show update diaglog
showDialogUpdate(PrincipalEventListActivity.this, arrID.get(position));
}
if (i == 1) {
//delete
Cursor c = PrincipalEventActivity.databaseEvent.getData("SELECT id FROM PRINCIPALS ");
ArrayList<Integer> arrID = new ArrayList<Integer>();
while (c.moveToNext()) {
arrID.add(c.getInt(0));
}
//show update diaglog
showDialogDelete(arrID.get(position));
}
}
});
dialog.show();
//return true;
}
});
}
private void showDialogDelete(final int idrecord) {
AlertDialog.Builder dialogDelete = new AlertDialog.Builder(PrincipalEventListActivity.this);
dialogDelete.setTitle("Warning..!!!");
dialogDelete.setMessage("Are You Sure..??");
dialogDelete.setPositiveButton("OK", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
try {
PrincipalEventActivity.databaseEvent.deleteData(idrecord);
Toast.makeText(PrincipalEventListActivity.this, "Deleted Successfully", Toast.LENGTH_SHORT).show();
} catch (Exception e) {
Log.e("error", e.getMessage());
}
updateRecordlist();
}
});
dialogDelete.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
});
dialogDelete.show();
}
private void showDialogUpdate(Activity activity, final int position) {
final Dialog dialog = new Dialog(activity);
dialog.setContentView(R.layout.upadte_principal_dialog);
dialog.setTitle("Update");
imageViewicon = dialog.findViewById(R.id.imageviewrecord);
final EditText edtselect = dialog.findViewById(R.id.editselect);
final EditText edtname = dialog.findViewById(R.id.editname);
final EditText edtorg = dialog.findViewById(R.id.editorg);
final EditText edtdays = dialog.findViewById(R.id.editdays);
final EditText editstart = dialog.findViewById(R.id.editstart);
Button btnupdate = dialog.findViewById(R.id.btnprincipalupdate);
//get all data from sqlite
Cursor cursor = PrincipalEventActivity.databaseEvent.getData("SELECT * FROM PRINCIPALS WHERE id=" + position);
mList.clear();
while (cursor.moveToNext()) {
int id = cursor.getInt(0);
String select = cursor.getString(1);
edtselect.setText(select);
String name = cursor.getString(2);
edtname.setText(name);
String org = cursor.getString(3);
edtorg.setText(org);
String days = cursor.getString(4);
edtdays.setText(days);
String start = cursor.getString(5);
editstart.setText(start);
byte[] image = cursor.getBlob(6);
imageViewicon.setImageBitmap(BitmapFactory.decodeByteArray(image, 0, image.length));
//adding list
mList.add(new Teacher_Event(id, select, name, org, days, start, image));
}
//set width of dialog
final int width = (int) (activity.getResources().getDisplayMetrics().widthPixels * 0.95);
//set height of dialog
int height = (int) (activity.getResources().getDisplayMetrics().heightPixels * 0.7);
dialog.getWindow().setLayout(width, height);
dialog.show();
//in update dialog click image to update image
imageViewicon.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//check external permission
ActivityCompat.requestPermissions(PrincipalEventListActivity.this,
new String[]{Manifest.permission.READ_EXTERNAL_STORAGE}, 888);
}
});
btnupdate.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
try {
PrincipalEventActivity.databaseEvent.updateData(
edtselect.getText().toString().trim(),
edtname.getText().toString().trim(),
edtorg.getText().toString().trim(),
edtdays.getText().toString().trim(),
editstart.getText().toString().trim(),
PrincipalEventActivity.imageViewToByte(imageViewicon), position);
dialog.dismiss();
Toast.makeText(getApplicationContext(), "Update Successfully", Toast.LENGTH_SHORT).show();
} catch (Exception error) {
Log.e("Update error", error.getMessage());
}
updateRecordlist();
}
});
}
private void updateRecordlist() {
//get all data from sqlite
Cursor cursor=PrincipalEventActivity.databaseEvent.getData("SELECT * FROM PRINCIPALS");
mList.clear();
while (cursor.moveToNext()){
int id = cursor.getInt(0);
String select=cursor.getString(1);
String name = cursor.getString(2);
String org =cursor.getString(3);
String days = cursor.getString(4);
String start=cursor.getString(5);
byte[] image=cursor.getBlob(6);
mList.add(new Teacher_Event(id, select, name, org, days, start, image));
}
Adapter.notifyDataSetChanged();
}
private static byte[] imageViewToByte(ImageView image) {
Bitmap bitmap=((BitmapDrawable)image.getDrawable()).getBitmap();
ByteArrayOutputStream stream=new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.PNG,100,stream);
byte[] bytearray=stream.toByteArray();
return bytearray;
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
if(requestCode==888){
if(grantResults.length>0 && grantResults[0]== PackageManager.PERMISSION_GRANTED){
//gallery intent
Intent galleryintent=new Intent(Intent.ACTION_GET_CONTENT);
galleryintent.setType("image/*");
startActivityForResult(galleryintent,888);
}else {
Toast.makeText(this, "Dont have persmission", Toast.LENGTH_SHORT).show();
}
return;
}
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
if(requestCode==888 && resultCode==RESULT_OK){
Uri imageuri =data.getData();
try {
Bitmap bitmap= MediaStore.Images.Media.getBitmap(getContentResolver(),imageuri);
imageViewicon.setImageBitmap(bitmap);
}catch (Exception e){
e.printStackTrace();
}
}
super.onActivityResult(requestCode, resultCode, data);
}
}
my logcat
E/SQLiteLog: (1)
E/Update error: no such column: name (Sqlite code 1 SQLITE_ERROR): , while compiling: UPDATE PRINCIPALS SET name=?, eventname=?, eventorganization=?, eventdays=?, eventstart=?, image=? WHERE id=?, (OS error - 11:Try again)
I/Choreographer: Skipped 42 frames! The application may be doing too much work on its main thread.
E/: [ZeroHung]zrhung_get_config: Get config failed for wp[0x0008]
I/OpenGLRenderer: Davey! duration=764ms; Flags=0, IntendedVsync=284156144329502, Vsync=284156844329474, OldestInputEvent=9223372036854775807, NewestInputEvent=0, HandleInputStart=284156845468044, AnimationStart=284156845521169, PerformTraversalsStart=284156845522732, DrawStart=284156892294086, SyncQueued=284156894770648, SyncStart=284156894993044, IssueDrawCommandsStart=284156895272732, SwapBuffers=284156906992003, FrameCompleted=284156909328982, DequeueBufferDuration=340000, QueueBufferDuration=535000,
W/libEGL: EGLNativeWindowType 0x7a9516f010 disconnect failed
W/InputEventReceiver: Attempted to finish an input event but the input event receiver has already been disposed.
W/InputMethodManager: startInputReason = 1
D/ZrHung.AppEyeUiProbe: stop checker.
D/ViewRootImpl[PrincipalEventListActivity]: surface should not be released
D/ZrHung.AppEyeUiProbe: Current Activity:false
not watching, wait.
W/libEGL: EGLNativeWindowType 0x7a951b3010 disconnect failed
最佳答案
更新期间，您的列名称与表实际列名称不匹配。请尝试以下操作:
String sql = "UPDATE PRINCIPAL SET selectname=?, eventname=?, eventorg=?, eventdays=?, eventstart=?, image=? WHERE id=? ";
create 和 update sql 之间的列有两个不匹配
nameshould beselectname
eventorganizationshould beeventorg
此外，您的表名称 PRINCIPALS 与 PRINCIPAL 不匹配。
关于java - Android sqlite数据库更新查询时没有这样的列，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/59561742/