在我的MainActivity代码中，我启动BackgroundTask将数据从我的SQLite写入MySQL数据库。到目前为止一切顺利。
在我调用BackgroundTask之后的代码中，我删除了Record，但这就是问题所在。记录被发送到MySQL数据库并删除记录，但是当传输到MySQL数据库出现问题时，记录也将被删除。搜索后，我发现我必须在代码添加到PostExecute的部分调用删除记录的执行。那就是问题所在。我无法找到如何做到这一点。有人可以帮我解决我的第一个应用程序的最后一点。感谢
public class MainActivity extends Activity {
Button btnAddNewRecord;
SQLiteHelper sQLiteHelper;
LinearLayout parentLayout;
LinearLayout layoutDisplayPeople;
TextView tvNoRecordsFound;
private TextView finalResult;
private String rowID = null;
private ArrayList<HashMap<String, String>> tableData = new ArrayList<HashMap<String, String>>();
/**
* ATTENTION: This was auto-generated to implement the App Indexing API.
* See https://g.co/AppIndexing/AndroidStudio for more information.
*/
private GoogleApiClient client;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.activity_main);
getAllWidgets();
sQLiteHelper = new SQLiteHelper(MainActivity.this);
bindWidgetsWithEvent();
displayAllRecords();
client = new GoogleApiClient.Builder(this).addApi(AppIndex.API).build();
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == RESULT_OK) {
String locatie = data.getStringExtra(Constants.LOCATIE);
String product = data.getStringExtra(Constants.PRODUCT);
String kleurwaaier = data.getStringExtra(Constants.KLEURWAAIER);
String kleur = data.getStringExtra(Constants.KLEUR);
String inhoud = data.getStringExtra(Constants.INHOUD);
ContactModel contact = new ContactModel();
contact.setLocatie(locatie);
contact.setProduct(product);
contact.setKleurwaaier(kleurwaaier);
contact.setKleur(kleur);
contact.setInhoud(inhoud);
if (requestCode == Constants.ADD_RECORD) {
//sQLiteHelper.insertRecord(locatie, product, kleurwaaier, kleur, inhoud);
sQLiteHelper.insertRecord(contact);
} else if (requestCode == Constants.UPDATE_RECORD) {
contact.setID(rowID);
//sQLiteHelper.updateRecord(locatie, product, kleurwaaier, kleur, inhoud, rowID);
sQLiteHelper.updateRecord(contact);
}
displayAllRecords();
}
}
private void getAllWidgets() {
btnAddNewRecord = (Button) findViewById(R.id.btnAddNewRecord);
parentLayout = (LinearLayout) findViewById(R.id.parentLayout);
layoutDisplayPeople = (LinearLayout) findViewById(R.id.layoutDisplayPeople);
tvNoRecordsFound = (TextView) findViewById(R.id.tvNoRecordsFound);
finalResult = (TextView) findViewById(R.id.tv_result);
}
private void bindWidgetsWithEvent() {
btnAddNewRecord.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
onAddRecord();
}
});
}
private void onAddRecord() {
Intent intent = new Intent(MainActivity.this, TableManipulationActivity.class);
intent.putExtra(Constants.DML_TYPE, Constants.INSERT);
startActivityForResult(intent, Constants.ADD_RECORD);
}
private void onUpdateRecord(String locatie, String product, String kleurwaaier, String kleur, String inhoud) {
Intent intent = new Intent(MainActivity.this, TableManipulationActivity.class);
intent.putExtra(Constants.LOCATIE, locatie);
intent.putExtra(Constants.PRODUCT, product);
intent.putExtra(Constants.KLEURWAAIER, kleurwaaier);
intent.putExtra(Constants.KLEUR, kleur);
intent.putExtra(Constants.INHOUD, inhoud);
intent.putExtra(Constants.DML_TYPE, Constants.UPDATE);
startActivityForResult(intent, Constants.UPDATE_RECORD);
}
private void displayAllRecords() {
com.rey.material.widget.LinearLayout inflateParentView;
parentLayout.removeAllViews();
ArrayList<ContactModel> contacts = sQLiteHelper.getAllRecords();
if (contacts.size() > 0) {
tvNoRecordsFound.setVisibility(View.GONE);
ContactModel contactModel;
for (int i = 0; i < contacts.size(); i++) {
contactModel = contacts.get(i);
final Holder holder = new Holder();
final View view = LayoutInflater.from(this).inflate(R.layout.inflate_record, null);
inflateParentView = (com.rey.material.widget.LinearLayout) view.findViewById(R.id.inflateParentView);
holder.tvFullName = (TextView) view.findViewById(R.id.tvFullName);
view.setTag(contactModel.getID());
holder.locatie = contactModel.getLocatie();
holder.product = contactModel.getProduct();
holder.kleurwaaier = contactModel.getKleurwaaier();
holder.kleur = contactModel.getKleur();
holder.inhoud = contactModel.getInhoud();
String personName = holder.locatie + "\n" + holder.product + "\n" + holder.kleurwaaier + " " + holder.kleur + " - [ " + holder.inhoud + "/4 ]";
holder.tvFullName.setText(personName);
final CharSequence[] items = {Constants.UPDATE, Constants.DELETE};
inflateParentView.setOnLongClickListener(new View.OnLongClickListener() {
@Override
public boolean onLongClick(View v) {
AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
builder.setItems(items, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
if (which == 0) {
rowID = view.getTag().toString();
onUpdateRecord(holder.locatie, holder.product, holder.kleurwaaier, holder.kleur, holder.inhoud.toString());
} else {
AlertDialog.Builder deleteDialogOk = new AlertDialog.Builder(MainActivity.this);
deleteDialogOk.setTitle("Verwijder Product ?");
deleteDialogOk.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
//sQLiteHelper.deleteRecord(view.getTag().toString());
ContactModel contact = new ContactModel();
contact.setID(view.getTag().toString());
sQLiteHelper.deleteRecord(contact);
displayAllRecords();
}
}
);
deleteDialogOk.setNegativeButton("Terug", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
}
});
deleteDialogOk.show();
}
}
});
AlertDialog alertDialog = builder.create();
alertDialog.show();
return true;
}
});
parentLayout.addView(view);
}
} else {
tvNoRecordsFound.setVisibility(View.VISIBLE);
}
}
public Action getIndexApiAction() {
Thing object = new Thing.Builder()
.setName("Main Page") // TODO: Define a title for the content shown.
// TODO: Make sure this auto-generated URL is correct.
.setUrl(Uri.parse("http://[ENTER-YOUR-URL-HERE]"))
.build();
return new Action.Builder(Action.TYPE_VIEW)
.setObject(object)
.setActionStatus(Action.STATUS_TYPE_COMPLETED)
.build();
}
@Override
public void onStart() {
super.onStart();
client.connect();
AppIndex.AppIndexApi.start(client, getIndexApiAction());
}
@Override
public void onStop() {
super.onStop();
AppIndex.AppIndexApi.end(client, getIndexApiAction());
client.disconnect();
}
public void userReg(View view) {
ArrayList<ContactModel> contacts = sQLiteHelper.getAllRecords();
if (contacts.size() > 0) {
ContactModel contactModel;
for (int i = 0; i < contacts.size(); i++) {
contactModel = contacts.get(i);
final Holder holder = new Holder();
//final View view = LayoutInflater.from(this).inflate(R.layout.inflate_record, null);
//inflateParentView = (com.rey.material.widget.LinearLayout) view.findViewById(R.id.inflateParentView);
holder.tvFullName = (TextView) view.findViewById(R.id.tvFullName);
view.setTag(contactModel.getID());
holder.locatie = contactModel.getLocatie();
holder.product = contactModel.getProduct();
holder.kleurwaaier = contactModel.getKleurwaaier();
holder.kleur = contactModel.getKleur();
holder.inhoud = contactModel.getInhoud();
String id = "test";
String locatie = holder.locatie.toString();
String product = holder.product.toString();
String kleurwaaier = holder.kleurwaaier.toString();
String kleur = holder.kleur.toString();
String inhoud = holder.inhoud.toString();
String method = "register";
BackgroundTask backgroundTask = new BackgroundTask(this);
backgroundTask.execute(method, id, locatie, product, kleurwaaier, kleur, inhoud);
//String status = backgroundTask.getStatus().toString();
/*
ContactModel contact = new ContactModel();
contact.setID(view.getTag().toString());
sQLiteHelper.deleteRecord(contact);
displayAllRecords();
*/
}
}
}
public class BackgroundTask extends AsyncTask<String, Void, String> {
AlertDialog alertDialog;
Context ctx;
BackgroundTask(Context ctx) {
this.ctx = ctx;
}
@Override
protected void onPreExecute() {
alertDialog = new AlertDialog.Builder(ctx).create();
alertDialog.setTitle("Login Information....");
}
@Override
protected String doInBackground(String... params) {
String reg_url = "http://xxx/register.php";
String method = params[0];
if (method.equals("register")) {
String id = params[1];
String locatie = params[2];
String product = params[3];
String kleurwaaier = params[4];
String kleur = params[5];
String inhoud = params[6];
try {
URL url = new URL(reg_url);
HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection();
httpURLConnection.setRequestMethod("POST");
httpURLConnection.setDoOutput(true);
//httpURLConnection.setDoInput(true);
OutputStream OS = httpURLConnection.getOutputStream();
BufferedWriter bufferedWriter = new BufferedWriter(new OutputStreamWriter(OS, "UTF-8"));
String data = URLEncoder.encode("id", "UTF-8") + "=" + URLEncoder.encode(id, "UTF-8") + "&" +
URLEncoder.encode("locatie", "UTF-8") + "=" + URLEncoder.encode(locatie, "UTF-8") + "&" +
URLEncoder.encode("product", "UTF-8") + "=" + URLEncoder.encode(product, "UTF-8") + "&" +
URLEncoder.encode("kleurwaaier", "UTF-8") + "=" + URLEncoder.encode(kleurwaaier, "UTF-8") + "&" +
URLEncoder.encode("kleur", "UTF-8") + "=" + URLEncoder.encode(kleur, "UTF-8") + "&" +
URLEncoder.encode("inhoud", "UTF-8") + "=" + URLEncoder.encode(inhoud, "UTF-8");
bufferedWriter.write(data);
bufferedWriter.flush();
bufferedWriter.close();
OS.close();
InputStream IS = httpURLConnection.getInputStream();
IS.close();
//httpURLConnection.connect();
httpURLConnection.disconnect();
return "Registration Success...";
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
return null;
}
@Override
protected void onProgressUpdate(Void... values) {
super.onProgressUpdate(values);
}
@Override
protected void onPostExecute(String result) {
if (result.equals("Registration Success...")) {
//Toast.makeText(ctx, result, Toast.LENGTH_LONG).show();
finalResult.setText(result);
ContactModel contact = new ContactModel();
contact.setID(view.getTag().toString());
sQLiteHelper.deleteRecord(contact);
} else {
alertDialog.setMessage(result);
alertDialog.show();
}
}
}
public String getText() {
finalResult = (TextView) findViewById(R.id.tv_result);
String text = finalResult.getText().toString();
return text;
}
private class Holder {
TextView tvFullName;
String locatie;
String product;
String kleurwaaier;
String kleur;
String inhoud;
}
}