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下面的代碼將應用程序與API連接起來，並從那裏檢索數據，它工作正常，唯一的問題是對話框消失得太快，它必須在同步時顯示正在進行然後消失。Android對話框不能正常顯示
/**
* SYNC
*/
import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Context;
import android.os.AsyncTask;
import android.util.Log;
import com.database.adapter.ClientesAdapter;
import com.model.ClienteModel;
import com.webservice.rest.ClientesRest;
import java.sql.SQLException;
import java.util.List;
public class SincronizarTask extends AsyncTask<Void, Void, Boolean> {
private final ProgressDialog dialog;
private Context ctx;
private ProgressDialog mProgressDialog;
public SincronizarTask(Activity activity) {
ctx = activity;
dialog = new ProgressDialog(ctx);
}
@Override
protected void onPreExecute() {
super.onPreExecute();
dialog.setCancelable(false);
dialog.setIndeterminate(false);
dialog.setProgressStyle(ProgressDialog.STYLE_SPINNER);
dialog.setTitle("Sincronizando");
dialog.setMessage("Aguarde...");
dialog.show();
}
@Override
protected Boolean doInBackground(Void... params) {
Log.i("RM", "doInBackground");
try {
ClientesRest mClientesRest = new ClientesRest(this.ctx);
Log.i("RM", "doInBackground : P1");
mClientesRest.getClientes(new ClientesRest.ClientesRestListener() {
public void clientesReceived(List<ClienteModel> clientes) {
Log.i("RM", "doInBackground : P:2");
// Log.i("RM", String.valueOf(clientes));
Log.i("RM", "doInBackground : P:3");
ClientesAdapter mClientesAdapter = new ClientesAdapter(ctx);
for (int i = 0; i < clientes.size(); i++) {
System.out.println(clientes.get(i).get_nome());
/*
Verifica se o cliente existe no banco de dados local
*/
Integer idClienteBdLocal = null;
try {
idClienteBdLocal = mClientesAdapter.consultaCadastroExistente(clientes.get(i).get_idrm());
} catch (SQLException e) {
e.printStackTrace();
}
if(clientes.get(i).get_status() == "D"){
if(mClientesAdapter.getRegistro(idClienteBdLocal).get_status() != "D"){
try {
mClientesAdapter.atualizar(new ClienteModel(idClienteBdLocal, clientes.get(i).get_idrm(), null, null, null, null, null, null, null, null, null, null, null, null, clientes.get(i).get_status()));
} catch (SQLException e) {
e.printStackTrace();
}
}
}
if (idClienteBdLocal != 0)
{
/*Atualiza o banco de dados local*/
try {
mClientesAdapter.atualizar(new ClienteModel(local, clientes.get(i).get_id(), clientes.get(i).get_name(), clientes.get(i).get_t(), clientes.get(i).get_add(), clientes.get(i).get_nu(), null, clientes.get(i).get_bb(), clientes.get(i).get_ba(), clientes.get(i).get_ci(), clientes.get(i).get_es(), null, clientes.get(i).get_cr(), clientes.get(i).get_mod(), clientes.get(i).get_st()));
} catch (SQLException e) {
e.printStackTrace();
}
}else {
/*Cria registro no banco de dados local*/
try {
mClientesAdapter.adicionar(new ClienteModel(clientes.get(i).get_idrm(), clientes.get(i).get_nome(), clientes.get(i).get_tipo(), clientes.get(i).get_endereco(), clientes.get(i).get_numero(), null, clientes.get(i).get_cep(), clientes.get(i).get_bairro(), clientes.get(i).get_cidade(), clientes.get(i).get_estado(), null, clientes.get(i).get_criado(), clientes.get(i).get_modificado(), clientes.get(i).get_status()));
} catch (SQLException e) {
e.printStackTrace();
}
}
}
}
});
} catch (Exception e) {
e.printStackTrace();
}
return true;
}
@Override
protected void onPostExecute(final Boolean success) {
if (dialog.isShowing()) {
dialog.dismiss();
}
}
@Override
protected void onCancelled() {
dialog.dismiss();
}
}
MainActivity：
public class MainActivity extends SherlockFragmentActivity {
private ActionBar barra;
private ViewPager mViewPager;
private TabsAdapter mTabsAdapter;
private Preferencias mPreferencias;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
/* Verifica se tem uma sessão */
mPreferencias = new Preferencias(getApplicationContext());
Toast.makeText(getApplicationContext(), mPreferencias.getRmSessionEmail(), Toast.LENGTH_SHORT).show();
mViewPager = new ViewPager(this);
mViewPager.setId(R.id.pager);
setContentView(mViewPager);
barra = getSupportActionBar();
barra.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
// barra.setDisplayShowHomeEnabled(false); /* retira a barra */
// barra.setDisplayShowTitleEnabled(false); /* retira o texto da barra */
mTabsAdapter = new TabsAdapter(this, mViewPager);
mTabsAdapter.addTab(barra.newTab().setIcon(R.drawable.agenda).setText(" Agenda"), jbkbjk.class, null);
mTabsAdapter.addTab(barra.newTab().setIcon(R.drawable.viagens).setText(" Viagens"), jnjn.class, null);
mTabsAdapter.addTab(barra.newTab().setIcon(R.drawable.clientes).setText(" Clientes"), ki.class, null);
mTabsAdapter.addTab(barra.newTab().setIcon(R.drawable.pedidos).setText(" Pedidos"), popo.class, null);
}
private static final int REFRESH = 1;
private static final int SEARCH = 2;
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getSupportMenuInflater();
inflater.inflate(R.menu.activity_itemlist, menu);
menu.add(0, REFRESH, 0, "Refresh")
.setIcon(R.drawable.ic_action_view_as_grid)
.setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS);
menu.add(0, SEARCH, 0, "Search")
.setIcon(R.drawable.ic_action_search)
.setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case REFRESH:
return true;
case SEARCH:
// Do search
return true;
case R.id.add_item:
this.dispatchSync();
return true;
default:
return super.onOptionsItemSelected(item);
}
}
private void dispatchSync(){
/* dispara a sincronização dos dados */
SincronizarTask mSincronizarTask = new SincronizarTask(this);
mSincronizarTask.execute((Void) null);
}
}
asynctask是如何被調用的？ – Raghunandan
@Raghunandan在我的MainActivity我有一個觸發，當我在同步單擊事件的功能 - 私人無效dispatchSync（）{ /* dispara一個sincronizaçãoDOS dados */ SincronizarTask mSincronizarTask =新SincronizarTask（本）; mSincronizarTask.execute（（Void）null）; } – AND4011002849
@WARpoluido只是將其添加到文章 – Typo