Java tutorial
/** * Copyright (C) 2013-2014 EaseMob Technologies. All rights reserved. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * http://www.apache.org/licenses/LICENSE-2.0 * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package im.afterclass.android.activity; import im.afterclass.android.Constant; import im.afterclass.android.DemoApplication; import im.afterclass.android.adapter.ContactAdapter; import im.afterclass.android.domain.User; import java.util.ArrayList; import java.util.Collections; import java.util.Comparator; import java.util.List; import org.apache.http.Header; import android.content.Context; import android.content.Intent; import android.graphics.drawable.Drawable; import android.os.Bundle; import android.support.v4.view.MenuItemCompat; import android.support.v7.app.ActionBar; import android.support.v7.app.ActionBarActivity; import android.view.Gravity; import android.view.LayoutInflater; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.view.ViewGroup; import android.view.MenuItem.OnMenuItemClickListener; import android.view.View.OnClickListener; import android.widget.FrameLayout; import android.widget.GridView; import android.widget.ImageView; import android.widget.LinearLayout; import android.widget.TextView; import android.widget.LinearLayout.LayoutParams; import android.widget.Toast; import com.easemob.chat.EMGroup; import com.easemob.chat.EMGroupManager; import com.loopj.android.http.AsyncHttpClient; import com.loopj.android.http.AsyncHttpResponseHandler; import im.afterclass.android.R; public class InvitePickActivity extends ActionBarActivity { private GridView gridView; /** ? */ protected boolean isCreatingNewGroup; /** ?? */ private boolean isSignleChecked; private PickContactAdapter contactAdapter; /** group? */ private List<String> exitingMembers; private LinearLayout contactSelected; private LayoutParams params; private final static String BASE_URL = "http://ac-mobile.twtapps.net"; private final static String ACTIVITY_JOIN_URL = "/act/d%/join/d%"; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_invite_pick_contacts); ActionBar actionBar = getSupportActionBar(); actionBar.setDisplayHomeAsUpEnabled(true); // String groupName = getIntent().getStringExtra("groupName"); String groupId = getIntent().getStringExtra("groupId"); if (groupId == null) {// isCreatingNewGroup = true; } else { // ?? EMGroup group = EMGroupManager.getInstance().getGroup(groupId); exitingMembers = group.getMembers(); } if (exitingMembers == null) exitingMembers = new ArrayList<String>(); // ?? final List<User> alluserList = new ArrayList<User>(); for (User user : DemoApplication.getInstance().getContactList().values()) { if (!user.getUsername().equals(Constant.NEW_FRIENDS_USERNAME) & !user.getUsername().equals(Constant.GROUP_USERNAME)) alluserList.add(user); } // list? Collections.sort(alluserList, new Comparator<User>() { @Override public int compare(User lhs, User rhs) { return (lhs.getUsername().compareTo(rhs.getUsername())); } }); contactSelected = (LinearLayout) findViewById(R.id.contact_selected); params = new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.MATCH_PARENT); params.leftMargin = 10; params.topMargin = 5; params.gravity = Gravity.CENTER; gridView = (GridView) findViewById(R.id.gridview); //listView = (ListView) findViewById(R.id.list); contactAdapter = new PickContactAdapter(this, R.layout.contact_gridview_item, alluserList); gridView.setAdapter(contactAdapter); // doPost(); } /** * members * * @param v */ public boolean onCreateOptionsMenu(Menu menu) { MenuItem saveItem = menu.add("saveButton"); MenuItemCompat.setShowAsAction(saveItem, MenuItemCompat.SHOW_AS_ACTION_IF_ROOM); saveItem.setIcon(R.drawable.ic_action_save); saveItem.setOnMenuItemClickListener(new OnMenuItemClickListener() { @Override public boolean onMenuItemClick(MenuItem arg0) { Toast.makeText(InvitePickActivity.this, "???", Toast.LENGTH_SHORT).show(); //Intent intent = new Intent(InvitePickActivity.this,LaunchActivity.class); //startActivity(intent); //overridePendingTransition(R.anim.head_in,0); return true; } }); return true; } public boolean onOptionsItemSelected(MenuItem item) { //Intent intent; switch (item.getItemId()) { case android.R.id.home: //intent = new Intent(InvitePickActivity.this,CreateActivity.class); //startActivity(intent); this.finish(); overridePendingTransition(0, R.anim.zoom_out); return true; default: return super.onOptionsItemSelected(item); } } /** * ??? * * @return */ private List<String> getToBeAddMembers() { List<String> members = new ArrayList<String>(); int length = contactAdapter.isCheckedArray.length; for (int i = 0; i < length; i++) { String username = contactAdapter.getItem(i + 1).getUsername(); if (contactAdapter.isCheckedArray[i] && !exitingMembers.contains(username)) { members.add(username); } } return members; } private void doPost() { List<String> members = getToBeAddMembers(); for (int i = 0; i < members.size(); i++) { String url = BASE_URL + String.format(ACTIVITY_JOIN_URL, 1, members.get(i)); AsyncHttpClient client = new AsyncHttpClient(); client.post(url, new AsyncHttpResponseHandler() { @Override public void onFailure(int statusCode, Header[] header, byte[] data, Throwable throwable) { super.onFailure(statusCode, header, data, throwable); // TODO handle error } @Override public void onSuccess(int statusCode, Header[] header, byte[] data) { super.onSuccess(statusCode, header, data); } }); } } /** * adapter */ private class PickContactAdapter extends ContactAdapter { private boolean[] isCheckedArray; private int count = 0; private LayoutInflater inflater; public PickContactAdapter(Context context, int resource, List<User> users) { super(context, resource, users); isCheckedArray = new boolean[users.size()]; } @Override public View getView(final int position, View convertView, ViewGroup parent) { View view = super.getView(position, convertView, parent); if (position == 0) { count++; } final String username = getItem(position).getUsername(); final FrameLayout contactFrameLayout = (FrameLayout) view.findViewById(R.id.contact_framelayout); final ImageView cancel = (ImageView) view.findViewById(R.id.cancel); contactFrameLayout.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub if (isSignleChecked && isCheckedArray[position]) { for (int i = 0; i < isCheckedArray.length; i++) { if (i != position) { isCheckedArray[i] = false; } } contactAdapter.notifyDataSetChanged(); } if (!isCheckedArray[position]) { contactFrameLayout .setForeground(getResources().getDrawable(R.drawable.framelayout_translucent_fg)); cancel.setVisibility(View.VISIBLE); isCheckedArray[position] = true; addViewToContactSelected(getContext(), position, username); } } }); cancel.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub contactFrameLayout .setForeground(getResources().getDrawable(R.drawable.framelayout_transparent_fg)); cancel.setVisibility(View.GONE); isCheckedArray[position] = false; refreshContactLayout(); } }); // ??? if (exitingMembers.contains(username)) { //checkBox.setChecked(true); contactFrameLayout.setForeground(getResources().getDrawable(R.drawable.framelayout_translucent_fg)); isCheckedArray[position] = true; if (count == 1 || position != 0) { addViewToContactSelected(getContext(), position, username); } } else { if (!isCheckedArray[position]) { contactFrameLayout .setForeground(getResources().getDrawable(R.drawable.framelayout_transparent_fg)); } } return view; } private void addViewToContactSelected(Context context, int position, String username) { inflater = LayoutInflater.from(context); View v = inflater.inflate(R.layout.contact_selected, null); //ImageView avatar = (ImageView) v.findViewById(R.id.avatar); TextView name = (TextView) v.findViewById(R.id.name); name.setText(username); contactSelected.addView(v, params); } private void refreshContactLayout() { contactSelected.removeAllViews(); for (int i = 0; i < isCheckedArray.length; i++) { if (isCheckedArray[i]) { addViewToContactSelected(getContext(), i, getItem(i).getUsername()); } } } } public void back(View view) { finish(); } }