Java tutorial
/* * Copyright 2013 Department of Computer Science and Technology, Guangxi University * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ package gxu.software_engineering.market.android.activity; import java.io.UnsupportedEncodingException; import java.util.ArrayList; import java.util.List; import java.util.concurrent.ExecutionException; import gxu.software_engineering.market.android.util.NetworkUtils; import gxu.software_engineering.market.android.util.RESTMethod; import org.apache.http.NameValuePair; import org.apache.http.client.entity.UrlEncodedFormEntity; import org.apache.http.message.BasicNameValuePair; import org.apache.http.protocol.HTTP; import org.json.JSONException; import org.json.JSONObject; import gxu.software_engineering.market.android.MarketApp; import gxu.software_engineering.market.android.R; import gxu.software_engineering.market.android.activity.NewItemActivity.CategoriesAdapter; import gxu.software_engineering.market.android.util.C; import gxu.software_engineering.market.android.util.Processor; import android.app.ProgressDialog; import android.content.ContentValues; import android.content.Intent; import android.database.Cursor; import android.net.Uri; import android.os.AsyncTask; import android.os.Bundle; import android.os.Handler; import android.support.v4.app.LoaderManager.LoaderCallbacks; import android.support.v4.content.CursorLoader; import android.support.v4.content.Loader; import android.util.Log; import android.view.View; import android.widget.AdapterView; import android.widget.AdapterView.OnItemSelectedListener; import android.widget.EditText; import android.widget.Spinner; import android.widget.Toast; import com.actionbarsherlock.app.SherlockFragmentActivity; import com.actionbarsherlock.view.Menu; import com.actionbarsherlock.view.MenuItem; /** * ??? * * @author longkai() * @email im.longkai@gmail.com * @since 2013-6-23 */ public class UpdateItemActivity extends SherlockFragmentActivity implements LoaderCallbacks<Cursor> { private static final int CLOSE = 1; private static final int OPEN = 2; private static final int DEAL = 3; private int updateType; private Long id; private Long cid; private boolean closed; private boolean deal; private CategoriesAdapter mAdapter; private Spinner spinner; private Cursor cursor; private EditText name; private EditText price; private EditText desc; private EditText extra; private ProgressDialog progressDialog; @Override protected void onCreate(Bundle arg0) { super.onCreate(arg0); setContentView(R.layout.new_item); id = getIntent().getLongExtra(C.ID, -1); cursor = getContentResolver().query(Uri.parse(C.BASE_URI + C.ITEMS + "/" + id), null, null, null, null); if (!cursor.moveToNext()) { Toast.makeText(this, R.string.item_not_found, Toast.LENGTH_SHORT).show(); finish(); return; } mAdapter = new CategoriesAdapter(this); spinner = (Spinner) findViewById(R.id.categories); name = (EditText) findViewById(R.id.name); price = (EditText) findViewById(R.id.price); desc = (EditText) findViewById(R.id.description); extra = (EditText) findViewById(R.id.extra); name.setText(cursor.getString(cursor.getColumnIndex(C.item.NAME))); price.setText(cursor.getString(cursor.getColumnIndex(C.item.PRICE))); desc.setText(cursor.getString(cursor.getColumnIndex(C.item.DESCRIPTION))); String _ = cursor.getString(cursor.getColumnIndex(C.item.EXTRA)); extra.setText(_.equals("null") ? "" : _); this.cid = cursor.getLong(cursor.getColumnIndex(C.item.CID)); this.closed = cursor.getString(cursor.getColumnIndex(C.item.CLOSED)).equalsIgnoreCase("true"); this.deal = cursor.getString(cursor.getColumnIndex(C.item.DEAL)).equalsIgnoreCase("true"); Log.i("cid!!", cid + ""); getSupportActionBar().setTitle(R.string.edit); } @Override public boolean onCreateOptionsMenu(Menu menu) { getSupportMenuInflater().inflate(R.menu.update_menu, menu); MenuItem item = menu.findItem(R.id.close_item); if (!this.closed) { item.setTitle(R.string.close_item); item.setIcon(R.drawable.navigation_cancel); } else { item.setTitle(R.string.open_item); item.setIcon(R.drawable.content_undo); } return true; } @Override protected void onStart() { super.onStart(); spinner.setAdapter(mAdapter); new Handler().postDelayed(new Runnable() { @Override public void run() { spinner.setSelection(UpdateItemActivity.this.cid.intValue() - 1); } }, 100); spinner.setOnItemSelectedListener(new OnItemSelectedListener() { @Override public void onItemSelected(AdapterView<?> parent, View view, int position, long id) { UpdateItemActivity.this.cid = id; } @Override public void onNothingSelected(AdapterView<?> parent) { parent.setSelection(UpdateItemActivity.this.cid.intValue()); } }); getSupportLoaderManager().initLoader(0, null, this); } @Override public boolean onOptionsItemSelected(MenuItem item) { long uid = MarketApp.marketApp().getPrefs().getLong(C.UID, -1); ContentValues values = null; switch (item.getItemId()) { case R.id.done: // Toast.makeText(this, R.string.submit, Toast.LENGTH_SHORT).show(); String[] data = resolveData(); try { values = new PutToCloud().execute(uid + "", cid + "", data[0], data[1], data[2], data[3]).get(); } catch (Exception e) { Toast.makeText(this, R.string.publish_fail, Toast.LENGTH_SHORT).show(); } break; case R.id.discard: finish(); break; case R.id.close_item: if (this.closed) { this.updateType = OPEN; } else { this.updateType = CLOSE; } try { values = new PutToCloud().execute(uid + "").get(); } catch (Exception e) { Toast.makeText(this, R.string.publish_fail, Toast.LENGTH_SHORT).show(); } break; case R.id.deal: if (this.deal) { Toast.makeText(this, R.string.has_dealt, Toast.LENGTH_SHORT).show(); return true; } this.updateType = DEAL; try { values = new PutToCloud().execute(uid + "").get(); } catch (Exception e) { Toast.makeText(this, R.string.publish_fail, Toast.LENGTH_SHORT).show(); } break; default: break; } if (values != null) { Toast.makeText(this, R.string.publish_ok, Toast.LENGTH_SHORT).show(); getContentResolver().insert(Uri.parse(C.BASE_URI + C.ITEMS), values); Intent i = new Intent(this, ItemActivity.class); i.putExtra(C.ID, this.id); startActivity(i); } else { Toast.makeText(this, R.string.publish_fail, Toast.LENGTH_SHORT).show(); } return super.onOptionsItemSelected(item); } @Override public Loader<Cursor> onCreateLoader(int arg0, Bundle arg1) { return new CursorLoader(this, Uri.parse(C.BASE_URI + C.CATEGORIES), null, null, null, C.ASC_SORT); } @Override public void onLoadFinished(Loader<Cursor> arg0, Cursor arg1) { mAdapter.swapCursor(arg1); } @Override public void onLoaderReset(Loader<Cursor> arg0) { mAdapter.swapCursor(null); } @Override protected void onDestroy() { super.onDestroy(); if (this.cursor != null) { cursor.close(); } } private class PutToCloud extends AsyncTask<String, Void, ContentValues> { private boolean connected; @Override protected ContentValues doInBackground(String... params) { ContentValues item = null; if (connected) { String httpUri = C.DOMAIN; List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(); switch (UpdateItemActivity.this.updateType) { case CLOSE: httpUri += String.format("/items/%d/close", UpdateItemActivity.this.id); nameValuePairs.add(new BasicNameValuePair(C.UID, params[0])); break; case OPEN: httpUri += String.format("/items/%d/open", UpdateItemActivity.this.id); nameValuePairs.add(new BasicNameValuePair(C.UID, params[0])); break; case DEAL: httpUri += "/records/add"; nameValuePairs.add(new BasicNameValuePair(C.UID, params[0])); nameValuePairs.add(new BasicNameValuePair("item_id", UpdateItemActivity.this.id + "")); break; default: httpUri = C.DOMAIN + String.format("/items/%d/modify", UpdateItemActivity.this.id); nameValuePairs.add(new BasicNameValuePair(C.UID, params[0])); nameValuePairs.add(new BasicNameValuePair(C.CID, params[1])); nameValuePairs.add(new BasicNameValuePair(C.item.NAME, params[2])); nameValuePairs.add(new BasicNameValuePair(C.item.PRICE, params[3])); nameValuePairs.add(new BasicNameValuePair(C.item.DESCRIPTION, params[4])); nameValuePairs.add(new BasicNameValuePair(C.item.PRICE, params[5])); break; } Log.i("http query string!!!", nameValuePairs.toString()); JSONObject result = null; try { UrlEncodedFormEntity entity = new UrlEncodedFormEntity(nameValuePairs, HTTP.UTF_8); if (updateType == DEAL) { result = RESTMethod.post(httpUri, entity); } else { result = RESTMethod.put(httpUri, entity); } Log.i("update result", result.toString()); } catch (Exception e) { Log.wtf("wtf in http post!!!", e); return null; } try { if (result.getInt(C.STATUS) == C.OK) { if (updateType == DEAL) { item = Processor.toItem(result.getJSONObject(C.RECORD).getJSONObject(C.ITEM)); } else { item = Processor.toItem(result.getJSONObject(C.ITEM)); } } } catch (JSONException e) { Log.wtf("wtf in resolving json!!!", e); } } return item; } @Override protected void onPreExecute() { if (NetworkUtils.connected(getApplicationContext())) { connected = true; progressDialog = new ProgressDialog(UpdateItemActivity.this); progressDialog.setTitle(R.string.publishing); progressDialog.show(); } } @Override protected void onPostExecute(ContentValues result) { if (!connected) { Toast.makeText(UpdateItemActivity.this, R.string.network_down, Toast.LENGTH_SHORT).show(); return; } progressDialog.dismiss(); if (result == null) { Toast.makeText(UpdateItemActivity.this, R.string.publish_fail, Toast.LENGTH_SHORT).show(); } } } private String[] resolveData() { // name = (EditText) findViewById(R.id.name); // price = (EditText) findViewById(R.id.price); // desc = (EditText) findViewById(R.id.description); // extra = (EditText) findViewById(R.id.extra); String _name = this.name.getEditableText().toString(); String _price = this.price.getEditableText().toString(); String _desc = this.desc.getEditableText().toString(); String _extra = this.extra.getEditableText().toString(); return new String[] { _name, _price, _desc, _extra }; } }