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物品丢失与找回（结对项目）
Lost and Found（失物招领APP）是以Bmob为基础的，参考了网上的案例。主要实现物品的发布、修改、呈现和删除。使用场景如下：用户捡到物品，打开手机软件，填写物品的招领信息（标题、描述和联系方式）；用户丢失物品，打开手机软件，填写物品的丢失信息（标题、描述和联系方式）；任何人都可以查看到失物和招领的信息列表，可以对发布的信息进行删除。该项目将使用到Bmob的以下几个功能：
1、 添加数据
添加失物/招领信息到服务器中。
2、 查找数据
在列表中显示所有用户发布的失物/招领信息。
3、 删除数据
删除已发布的失物/招领信息。
部分界面效果如下：
进入动画 
主界面 
失物信息界面
添加失物信息界面
失物列表 
编辑删除 
数据结构设计
| 失物表（Lost） | ||
| 字段名 | 类型 | 描述 |
| describe | String | 失物的描述信息 |
| phone | String | 联系的手机号码 |
| title | String | 失物的标题信息 |
| 招领表（Found） | ||
| 字段名 | 类型 | 描述 |
| describe | String | 招领的描述信息 |
| phone | String | 联系的手机号码 |
| title | String | 招领的标题信息 |
初始化SDK
Bmob为每个应用都提供了一个唯一标识，使用Bmob开发的应用都要首先使用这个Application ID”进行初始化（在前面博客中已经提到）。对应代码如下：
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//初始化 Bmob SDK，第一个参数为上下文，第二个参数为Application ID
Bmob.initialize(this, Constants.Bmob_APPID);
//其他代码
}
Lost类和Found类
为操作Bmob的云端数据库，SDK首先需要创建数据表对应的模型类（模型类的名称必须和云端数据表的名称一致），该类需要继承自BmobObject，实现刚刚创建的数据表字段的set和get方法（系统默认字段objectId、createAt、updateAt不需要声明）。因为项目需要操作Lost表和Found表，因此需要创建Lost类和Found类。
创建失物对象
public class Lost extends BmobObject{
private String title;//标题
private String describe;//描述
private String phone;//联系手机
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public String getDescribe() {
return describe;
}
public void setDescribe(String describe) {
this.describe = describe;
}
public String getPhone() {
return phone;
}
public void setPhone(String phone) {
this.phone = phone;
}
}
创建招领对象
public class Found extends BmobObject {
private String title;//标题
private String describe;//描述
private String phone;//联系手机
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public String getDescribe() {
return describe;
}
public void setDescribe(String describe) {
this.describe = describe;
}
public String getPhone() {
return phone;
}
public void setPhone(String phone) {
this.phone = phone;
}
}
添加失物/招领信息
用户填写了失物信息之后，只需要构造一个Lost实例，然后简单调用模型类的insertObject方法就可以将信息添加到云数据库中，实现代码如下:
public class AddActivity extends BaseActivity implements OnClickListener {
EditText edit_title, edit_photo, edit_describe;
Button btn_back, btn_true;
TextView tv_add;
String from = "";
String old_title = "";
String old_describe = "";
String old_phone = "";
@Override
public void setContentView() {
// TODO Auto-generated method stub
setContentView(R.layout.activity_add);
}
@Override
public void initViews() {
// TODO Auto-generated method stub
tv_add = (TextView) findViewById(R.id.tv_add);
btn_back = (Button) findViewById(R.id.btn_back);
btn_true = (Button) findViewById(R.id.btn_true);
edit_photo = (EditText) findViewById(R.id.edit_photo);
edit_describe = (EditText) findViewById(R.id.edit_describe);
edit_title = (EditText) findViewById(R.id.edit_title);
}
@Override
public void initListeners() {
// TODO Auto-generated method stub
btn_back.setOnClickListener(this);
btn_true.setOnClickListener(this);
}
@Override
public void initData() {
// TODO Auto-generated method stub
from = getIntent().getStringExtra("from");
old_title = getIntent().getStringExtra("title");
old_phone = getIntent().getStringExtra("phone");
old_describe = getIntent().getStringExtra("describe");
edit_title.setText(old_title);
edit_describe.setText(old_describe);
edit_photo.setText(old_phone);
if (from.equals("Lost")) {
tv_add.setText("添加失物信息");
} else {
tv_add.setText("添加招领信息");
}
}
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
if (v == btn_true) {
addByType();
} else if (v == btn_back) {
finish();
}
}
String title = "";
String describe = "";
String photo="";
/**根据类型添加失物/招领
*
*/
private void addByType(){
title = edit_title.getText().toString();
describe = edit_describe.getText().toString();
photo = edit_photo.getText().toString();
if(TextUtils.isEmpty(title)){
ShowToast("请填写标题");
return;
}
if(TextUtils.isEmpty(describe)){
ShowToast("请填写描述");
return;
}
if(TextUtils.isEmpty(photo)){
ShowToast("请填写手机");
return;
}
if(from.equals("Lost")){
addLost();
}else{
addFound();
}
}
private void addLost(){
Lost lost = new Lost();
lost.setDescribe(describe);
lost.setPhone(photo);
lost.setTitle(title);
lost.save(this, new SaveListener() {
@Override
public void onSuccess() {
// TODO Auto-generated method stub
ShowToast("失物信息添加成功!");
setResult(RESULT_OK);
finish();
}
@Override
public void onFailure(int code, String arg0) {
// TODO Auto-generated method stub
ShowToast("添加失败:"+arg0);
}
});
}
private void addFound(){
Found found = new Found();
found.setDescribe(describe);
found.setPhone(photo);
found.setTitle(title);
found.save(this, new SaveListener() {
@Override
public void onSuccess() {
// TODO Auto-generated method stub
ShowToast("招领信息添加成功!");
setResult(RESULT_OK);
finish();
}
@Override
public void onFailure(int code, String arg0) {
// TODO Auto-generated method stub
ShowToast("添加失败:"+arg0);
}
});
}
}
获取失物/招领列表、删除失物招领信息
项目使用到Bmob提供的最简单的查询和排序功能，直接调用BmobQuery类的findObjects方法和order方法来获取失物列表。从云数据库中删除某条记录需要设置这个要删除的ObjectId的信息，再调用模型类的deleteObject方法就可以了，实现代码如下
public class MainActivity extends BaseActivity implements OnClickListener,
IPopupItemClick, OnItemLongClickListener {
RelativeLayout layout_action;//
LinearLayout layout_all;
TextView tv_lost;
ListView listview;
Button btn_add;
protected QuickAdapter<Lost> LostAdapter;// 失物
protected QuickAdapter<Found> FoundAdapter;// 招领
private Button layout_found;
private Button layout_lost;
PopupWindow morePop;
RelativeLayout progress;
LinearLayout layout_no;
TextView tv_no;
@Override
public void setContentView() {
// TODO Auto-generated method stub
setContentView(R.layout.activity_main);
}
@Override
public void initViews() {
// TODO Auto-generated method stub
progress = (RelativeLayout) findViewById(R.id.progress);
layout_no = (LinearLayout) findViewById(R.id.layout_no);
tv_no = (TextView) findViewById(R.id.tv_no);
layout_action = (RelativeLayout) findViewById(R.id.layout_action);
layout_all = (LinearLayout) findViewById(R.id.layout_all);
// 默认是失物界面
tv_lost = (TextView) findViewById(R.id.tv_lost);
tv_lost.setTag("lost");
listview = (ListView) findViewById(R.id.list_lost);
btn_add = (Button) findViewById(R.id.btn_add);
// 初始化长按弹窗
initEditPop();
}
@Override
public void initListeners() {
// TODO Auto-generated method stub
listview.setOnItemLongClickListener(this);
btn_add.setOnClickListener(this);
layout_all.setOnClickListener(this);
}
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
if (v == layout_all) {
showListPop();
} else if (v == btn_add) {
Intent intent = new Intent(this, AddActivity.class);
intent.putExtra("from", tv_lost.getTag().toString());
startActivityForResult(intent, Constants.REQUESTCODE_ADD);
} else if (v == layout_found) {
changeTextView(v);
morePop.dismiss();
queryFounds();
} else if (v == layout_lost) {
changeTextView(v);
morePop.dismiss();
queryLosts();
}
}
@Override
public void initData() {
// TODO Auto-generated method stub
if (LostAdapter == null) {
LostAdapter = new QuickAdapter<Lost>(this, R.layout.item_list) {
@Override
protected void convert(BaseAdapterHelper helper, Lost lost) {
helper.setText(tv_title, lost.getTitle())
.setText(tv_describe, lost.getDescribe())
.setText(tv_time, lost.getCreatedAt())
.setText(tv_photo, lost.getPhone());
}
};
}
if (FoundAdapter == null) {
FoundAdapter = new QuickAdapter<Found>(this, R.layout.item_list) {
@Override
protected void convert(BaseAdapterHelper helper, Found found) {
helper.setText(tv_title, found.getTitle())
.setText(tv_describe, found.getDescribe())
.setText(tv_time, found.getCreatedAt())
.setText(tv_photo, found.getPhone());
}
};
}
listview.setAdapter(LostAdapter);
// 默认加载失物界面
queryLosts();
}
private void changeTextView(View v) {
if (v == layout_found) {
tv_lost.setTag("Found");
tv_lost.setText("Found");
} else {
tv_lost.setTag("Lost");
tv_lost.setText("Lost");
}
}
@SuppressWarnings("deprecation")
private void showListPop() {
View view = LayoutInflater.from(this).inflate(R.layout.pop_lost, null);
// 注入
layout_found = (Button) view.findViewById(R.id.layout_found);
layout_lost = (Button) view.findViewById(R.id.layout_lost);
layout_found.setOnClickListener(this);
layout_lost.setOnClickListener(this);
morePop = new PopupWindow(view, mScreenWidth, 600);
morePop.setTouchInterceptor(new OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
if (event.getAction() == MotionEvent.ACTION_OUTSIDE) {
morePop.dismiss();
return true;
}
return false;
}
});
morePop.setWidth(WindowManager.LayoutParams.MATCH_PARENT);
morePop.setHeight(WindowManager.LayoutParams.WRAP_CONTENT);
morePop.setTouchable(true);
morePop.setFocusable(true);
morePop.setOutsideTouchable(true);
morePop.setBackgroundDrawable(new BitmapDrawable());
// 动画效果 从顶部弹下
morePop.setAnimationStyle(R.style.MenuPop);
morePop.showAsDropDown(layout_action, 0, -dip2px(this, 2.0F));
}
private void initEditPop() {
mPopupWindow = new EditPopupWindow(this, 200,48);
mPopupWindow.setOnPopupItemClickListner(this);
}
EditPopupWindow mPopupWindow;
int position;
@Override
public boolean onItemLongClick(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
// TODO Auto-generated method stub
position = arg2;
int[] location = new int[2];
arg1.getLocationOnScreen(location);
mPopupWindow.showAtLocation(arg1, Gravity.RIGHT | Gravity.TOP,
location[0], getStateBar() + location[1]);
return false;
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
// TODO Auto-generated method stub
super.onActivityResult(requestCode, resultCode, data);
if (resultCode != RESULT_OK) {
return;
}
switch (requestCode) {
case Constants.REQUESTCODE_ADD:// 添加成功之后的回调
String tag = tv_lost.getTag().toString();
if (tag.equals("Lost")) {
queryLosts();
} else {
queryFounds();
}
break;
}
}
/**
* 查询全部失物信息 queryLosts
*
*
*/
private void queryLosts() {
showView();
BmobQuery<Lost> query = new BmobQuery<Lost>();
query.order("-createdAt");// 按照时间降序
query.findObjects(this, new FindListener<Lost>() {
@Override
public void onSuccess(List<Lost> losts) {
// TODO Auto-generated method stub
LostAdapter.clear();
FoundAdapter.clear();
if (losts == null || losts.size() == 0) {
showErrorView(0);
LostAdapter.notifyDataSetChanged();
return;
}
progress.setVisibility(View.GONE);
LostAdapter.addAll(losts);
listview.setAdapter(LostAdapter);
}
@Override
public void one rror(int code, String arg0) {
// TODO Auto-generated method stub
showErrorView(0);
}
});
}
public void queryFounds() {
showView();
BmobQuery<Found> query = new BmobQuery<Found>();
query.order("createdAt");// 按照时间降序
query.findObjects(this, new FindListener<Found>() {
@Override
public void onSuccess(List<Found> arg0) {
// TODO Auto-generated method stub
LostAdapter.clear();
FoundAdapter.clear();
if (arg0 == null || arg0.size() == 0) {
showErrorView(1);
FoundAdapter.notifyDataSetChanged();
return;
}
FoundAdapter.addAll(arg0);
listview.setAdapter(FoundAdapter);
progress.setVisibility(View.GONE);
}
@Override
public void one rror(int code, String arg0) {
// TODO Auto-generated method stub
showErrorView(1);
}
});
}
/**
* 请求出错或者无数据时候显示的界面 showErrorView
*
*/
private void showErrorView(int tag) {
progress.setVisibility(View.GONE);
listview.setVisibility(View.GONE);
layout_no.setVisibility(View.VISIBLE);
if (tag == 0) {
tv_no.setText(getResources().getText(R.string.list_no_data_lost));
} else {
tv_no.setText(getResources().getText(R.string.list_no_data_found));
}
}
private void showView() {
listview.setVisibility(View.VISIBLE);
layout_no.setVisibility(View.GONE);
}
@Override
public void onEdit(View v) {
// TODO Auto-generated method stub
String tag = tv_lost.getTag().toString();
Intent intent = new Intent(this, AddActivity.class);
String title = "";
String describe = "";
String phone = "";
if (tag.equals("Lost")) {
title = LostAdapter.getItem(position).getTitle();
describe = LostAdapter.getItem(position).getDescribe();
phone = LostAdapter.getItem(position).getPhone();
} else {
title = FoundAdapter.getItem(position).getTitle();
describe = FoundAdapter.getItem(position).getDescribe();
phone = FoundAdapter.getItem(position).getPhone();
}
intent.putExtra("decribe", describe);
intent.putExtra("phone", phone);
intent.putExtra("title", title);
intent.putExtra("from", tag);
startActivityForResult(intent, Constants.REQUESTCODE_ADD);
}
@Override
public void onDelete(View v) {
// TODO Auto-generated method stub
String tag = tv_lost.getTag().toString();
if (tag.equals(”Lost")) {
deleteLost();
} else {
deleteFound();
}
}
private void deleteLost() {
Lost lost = new Lost();
lost.setObjectId(LostAdapter.getItem(position).getObjectId());
lost.delete(this, new DeleteListener() {
@Override
public void onSuccess() {
// TODO Auto-generated method stub
LostAdapter.remove(position);
}
@Override
public void onFailure(int code, String arg0) {
// TODO Auto-generated method stub
}
});
}
private void deleteFound() {
Found found = new Found();
found.setObjectId(FoundAdapter.getItem(position).getObjectId());
found.delete(this, new DeleteListener() {
@Override
public void onSuccess() {
// TODO Auto-generated method stub
FoundAdapter.remove(position);
}
@Override
public void onFailure(int code, String arg0) {
// TODO Auto-generated method stub
}
});
}
}
结对成员已将登录与注册界面设计发布 可参考http://www.cnblogs.com/buyaping/p/6942822.html
物品丢失与找回（结对项目）
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