GuideMap 登录界面 详细文档（三）

1、获取已经保存好的用户密码
private void getSavedUsers()

2、初始化
private void initView()

3、点击事件
@Override public void onClick(View v)

4、退出此Activity时保存users
@Override public void onPause()

5、账户名下拉框相关
弹出窗口初始化
public void initPop()
内部类，账户名下拉框的listView的适配器
class MyAapter extends ArrayAdapter<User>
PopupWindow对象dismiss时的事件
public void onDismiss()
点击listView
public void onItemClick()

6、监听editText编辑框的变化
private void setListener()

7、显示载入中界面
private void showLoginingDlg()
private void closeLoginingDlg()
private void initLoginingDlg()

/**
* 登陆界面
*/
public class LoginActivity extends AppCompatActivity implements View.OnClickListener,
AdapterView.OnItemClickListener , PopupWindow.OnDismissListener{

protected static final String TAG = "LoginActivity";
private Button mLoginButton;
private TextView mErrorLoginButton;
private TextView mRegisterButton;
private EditText mUserAccountEdit;   //用户名编辑框
private EditText mUserpasswordEdit;  //密码编辑框

private Toolbar toolbar;

private LinearLayout mLoginLinearLayout; // 登录内容的容器
private LinearLayout mUserAccountLinearLayout; // 将下拉弹出窗口在此容器下方显示
private Animation mTranslate; // 位移动画
private Dialog mLoginingDlg; // 显示正在登录的Dialog
private ImageView mMoreUser; // 下拉图标
private ImageView mLoginMoreUserView; // 弹出下拉弹出窗的按钮
private String mAccount;
private String mPassword;
private ArrayList<User> mUsers; // 用户列表
private ListView mUserAccountListView; // 下拉弹出窗显示的ListView对象
private PopupWindow mPop; // 下拉弹出窗
private MyAapter mAdapter; // ListView的监听器

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
initView();
getSavedUsers();
setListener();
mLoginLinearLayout.startAnimation(mTranslate); // Y轴水平移动

}

private void getSavedUsers(){
/*  获取已经保存好的用户密码 */
mUsers= UserLoginSave.getUserList(LoginActivity.this);

if (mUsers.size()>0){
/* 将列表中的第一个user显示在编辑框 */
mUserAccountEdit.setText(mUsers.get(0).GetAccount());
mAccount=mUsers.get(0).GetAccount();
mUserpasswordEdit.setText(mUsers.get(0).GetPassword());
mPassword=mUsers.get(0).GetPassword();
}

LinearLayout parent = (LinearLayout) getLayoutInflater().inflate(
R.layout.userifo_listview, null);
mUserAccountListView = (ListView) parent.findViewById(android.R.id.list);
parent.removeView(mUserAccountListView); // 必须脱离父子关系,不然会报错
mUserAccountListView.setOnItemClickListener(this); // 设置点击事件
mAdapter = new MyAapter(mUsers);
mUserAccountListView.setAdapter(mAdapter);
}

private void initView(){

mUserAccountEdit=(EditText)findViewById(R.id.login_edtAccount);
mUserpasswordEdit=(EditText)findViewById(R.id.login_edtPwd);

mLoginButton=(Button)findViewById(R.id.login_btn);
mLoginButton.setOnClickListener(this);

mErrorLoginButton=(TextView)findViewById(R.id.loginerror_tv);
mErrorLoginButton.setOnClickListener(this);

mRegisterButton=(TextView)findViewById(R.id.register_tv);
mRegisterButton.setOnClickListener(this);

mMoreUser = (ImageView) findViewById(R.id.login_more_user);
mLoginButton = (Button) findViewById(R.id.login_btn);
mLoginMoreUserView = (ImageView) findViewById(R.id.login_more_user);
mLoginLinearLayout = (LinearLayout) findViewById(R.id.login_linearLayout);
mUserAccountLinearLayout = (LinearLayout) findViewById(R.id.userAccount_LinearLayout);
mTranslate = AnimationUtils.loadAnimation(this, R.anim.my_translate); // 初始化动画对象

initLoginingDlg();
}

@Override
public void onClick(View v) {
int id=v.getId();
switch (id){
case R.id.login_btn:
Toast.makeText(this, "login", Toast.LENGTH_LONG).show();
showLoginingDlg();//显示"正在登录"对话框
Log.i(TAG, mAccount + "  " + mPassword);
if (mAccount == null || mAccount.equals("")) {
// 账号为空时
Toast.makeText(LoginActivity.this, "请输入账号", Toast.LENGTH_SHORT)
.show();
} else if (mPassword == null || mPassword.equals("")) {
// 密码为空时
Toast.makeText(LoginActivity.this, "请输入密码", Toast.LENGTH_SHORT)
.show();
} else {
// 账号和密码都不为空时
boolean mIsSave = true;
try {
Log.i(TAG, "保存用户列表");
for (User user : mUsers) { // 判断本地文档是否有此ID用户
if (user.GetAccount().equals(mAccount)) {
mIsSave = false;
Toast.makeText(LoginActivity.this, "本地有此ID", Toast.LENGTH_SHORT)
.show();
break;
}
}
if (mIsSave) { // 将新用户加入users
Toast.makeText(LoginActivity.this, "保存ID", Toast.LENGTH_SHORT)
.show();
User user = new User(mAccount, mPassword);
mUsers.add(user);

}

} catch (Exception e) {
e.printStackTrace();
}
/**
* 检查用户账户是否存在，返回0则存在
*
*/
VolleyIO.JsonGet(Constant.Url_isAccountExist + "account=" + mAccount, new VolleyInterface(LoginActivity.this, VolleyInterface.mListener, VolleyInterface.mErrorListener) {
@Override
public void onMySuccess(JSONObject result) {
Log.i(TAG, Constant.Url_isAccountExist + "account=" + mAccount);
if (result.optString("errorName").equals("0")) {

/**
* 进行登录操作，返回0则登陆成功
*/
VolleyIO.JsonGet(Constant.LoginUrl + "account=" + mAccount + "&" + "password=" + mPassword, new VolleyInterface(LoginActivity.this, VolleyInterface.mListener, VolleyInterface.mErrorListener) {
@Override
public void onMySuccess(JSONObject result) {
Log.i(TAG, result.toString());
if (result.optString("errorName").equals("0")) {
Toast.makeText(LoginActivity.this, "登陆成功1", Toast.LENGTH_SHORT).show();
/**
* 获取用户信息
*/
VolleyIO.JsonGet(Constant.Url_getinfo + "account=" + mAccount, new VolleyInterface(LoginActivity.this, VolleyInterface.mListener, VolleyInterface.mErrorListener) {
@Override
public void onMySuccess(JSONObject result) {
Toast.makeText(LoginActivity.this, "登陆成功2", Toast.LENGTH_SHORT).show();
Gson gson = new Gson();
User user = gson.fromJson(result.toString(), User.class);

LoginUser.account = user.GetAccount();
LoginUser.password = user.GetPassword();
LoginUser.name = user.GetName();
LoginUser.phone = user.GetPhone();
LoginUser.mail = user.GetMail();

closeLoginingDlg();// 关闭对话框

try {
UserLoginSave.saveUserList(LoginActivity.this, mUsers);
} catch (Exception e) {
e.printStackTrace();
}
finish();
}

@Override
public void onMyError(VolleyError error) {

}
});
} else {
Toast.makeText(LoginActivity.this, "密码错误", Toast.LENGTH_SHORT).show();
}
}

@Override
public void onMyError(VolleyError error) {
Log.i(TAG, "onMyError");
}
});
} else {
Toast.makeText(LoginActivity.this, "用户名不存在", Toast.LENGTH_SHORT).show();
}
}

@Override
public void onMyError(VolleyError error) {
Toast.makeText(LoginActivity.this, "登录失败", Toast.LENGTH_LONG).show();
Log.i(TAG, Constant.Url_isAccountExist + "account=" + mAccount);
}
});

}

break;
case R.id.loginerror_tv:
Toast.makeText(this, "login error", Toast.LENGTH_LONG).show();
/**
*
* 测试
*/

VolleyIO.JsonGet(Constant.TestUrl, new VolleyInterface(LoginActivity.this, VolleyInterface.mListener, VolleyInterface.mErrorListener) {
@Override
public void onMySuccess(JSONObject result) {

Gson gson = new Gson();
Test test = gson.fromJson(result.toString(), Test.class);
LoginUser.name=test.getCity();

}

@Override
public void onMyError(VolleyError error) {

}
});
break;
case R.id.register_tv:
Intent intent=new Intent();
intent.setClass(this, RegisterActivity.class);
startActivity(intent);
Toast.makeText(this, "register", Toast.LENGTH_LONG).show();
break;

case R.id.login_more_user: // 当点击下拉栏
Log.i(TAG, "当点击下拉栏");

if (mPop == null) {
initPop();
}
if (!mPop.isShowing() && mUsers.size() > 0) {
Log.i(TAG, "切换为角向上图标");
mMoreUser.setImageResource(R.drawable.login_more_up); // 切换图标
mPop.showAsDropDown(mUserAccountLinearLayout, 2, 1); // 显示弹出窗口
}
break;

}

}
/* 退出此Activity时保存users */
@Override
public void onPause() {
super.onPause();
try {
UserLoginSave.saveUserList(LoginActivity.this,mUsers);
} catch (Exception e) {
e.printStackTrace();
}
}

/**
*  PopupWindow对象dismiss时的事件 */
@Override
public void onDismiss() {
mMoreUser.setImageResource(R.drawable.login_more_up);
}

@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

mUserAccountEdit.setText(mUsers.get(position).GetAccount());
mUserpasswordEdit.setText(mUsers.get(position).GetPassword());
mPop.dismiss();
}

/**
*  ListView的适配器
*  */
class MyAapter extends ArrayAdapter<User> {

public MyAapter(ArrayList<User> users) {
super(LoginActivity.this, 0, users);
}

public View getView(final int position, View convertView,
ViewGroup parent) {
if (convertView == null) {
convertView = getLayoutInflater().inflate(
R.layout.login_listview_item, null);
}

TextView userIdText = (TextView) convertView
.findViewById(R.id.listview_userAccount);
userIdText.setText(getItem(position).GetAccount());

ImageView deleteUser = (ImageView) convertView
.findViewById(R.id.login_delete_user);
deleteUser.setOnClickListener(new View.OnClickListener() {
// 点击删除deleteUser时,在mUsers中删除选中的元素
@Override
public void onClick(View v) {

if (getItem(position).GetAccount().equals(mAccount)) {
// 如果要删除的用户Id和Id编辑框当前值相等，则清空
mAccount = "";
mPassword = "";
mUserAccountEdit.setText(mAccount);
mUserpasswordEdit.setText(mPassword);
}
mUsers.remove(getItem(position));
mAdapter.notifyDataSetChanged(); // 更新ListView
}
});
return convertView;
}

}

/**
*  监听EditText的变化
*/
private void setListener() {
mUserAccountEdit.addTextChangedListener(new TextWatcher() {

//变化中
public void onTextChanged(CharSequence s, int start, int before,
int count) {
mAccount = s.toString();
}
//变化前
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
}
//变化后
public void afterTextChanged(Editable s) {
}
});
mUserpasswordEdit.addTextChangedListener(new TextWatcher() {

public void onTextChanged(CharSequence s, int start, int before,
int count) {
mPassword = s.toString();
}

public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
}

public void afterTextChanged(Editable s) {
}
});

mLoginButton.setOnClickListener(this);
mLoginMoreUserView.setOnClickListener(this);
}

/**
*  显示正在登录对话框 */
private void showLoginingDlg() {
if (mLoginingDlg != null)
mLoginingDlg.show();
}

/**
*  关闭正在登录对话框 */
private void closeLoginingDlg() {
if (mLoginingDlg != null && mLoginingDlg.isShowing())
mLoginingDlg.dismiss();
}

/**
* 弹出窗口
*/
public void initPop() {
int width = mUserAccountLinearLayout.getWidth() - 4;
int height = LinearLayout.LayoutParams.WRAP_CONTENT;
mPop = new PopupWindow(mUserAccountListView, width, height, true);
mPop.setOnDismissListener(this);// 设置弹出窗口消失时监听器

// 注意要加这句代码，点击弹出窗口其它区域才会让窗口消失
mPop.setBackgroundDrawable(new ColorDrawable(0xffffffff));

}

/**
*
*
* 初始化正在登录对话框
*
* */
private void initLoginingDlg() {

mLoginingDlg = new Dialog(this, R.style.loginingDlg);
mLoginingDlg.setContentView(R.layout.logining_dlg);

Window window = mLoginingDlg.getWindow();
WindowManager.LayoutParams params = window.getAttributes();
// 获取和mmLoginingDlg关联的当前窗口的属性，从而设置它在屏幕中显示的位置

// 获取屏幕的高宽
DisplayMetrics dm = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(dm);
int cxScreen = dm.widthPixels;
int cyScreen = dm.heightPixels;

int height = (int) getResources().getDimension(
R.dimen.loginingdlg_height);// 高42dp
int lrMargin = (int) getResources().getDimension(
R.dimen.loginingdlg_lr_margin); // 左右边沿10dp
int topMargin = (int) getResources().getDimension(
R.dimen.loginingdlg_top_margin); // 上沿20dp

params.y = (-(cyScreen - height) / 2) + topMargin; // -199
/* 对话框默认位置在屏幕中心,所以x,y表示此控件到"屏幕中心"的偏移量 */

params.width = cxScreen;
params.height = height;
// width,height表示mLoginingDlg的实际大小

mLoginingDlg.setCanceledOnTouchOutside(true); // 设置点击Dialog外部任意区域关闭Dialog
}

}

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/login3">
<RelativeLayout
android:id="@+id/login_layout"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="20dp"
android:layout_marginRight="20dp"
android:gravity="center" >
<LinearLayout
android:id="@+id/login_linearLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginLeft="15dp"
android:layout_marginRight="15dp"
android:layout_marginTop="80dp"
android:orientation="vertical"
>

<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@color/white"
android:orientation="vertical"
>

<LinearLayout
android:id="@+id/userAccount_LinearLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="right"
android:orientation="horizontal" >

<!-- android:ems="10"表示EditText内最多只显示10个字符，超出不显示 -->
<!-- android:singleLine="true"表示不能全部显示时，后面用“…”来表示 -->
<!-- android:background="@null"不显示默认编辑框背景 -->
<EditText
android:id="@+id/login_edtAccount"
android:layout_width="0dp"
android:layout_height="44dp"
android:layout_weight="1"
android:background="@null"
android:ems="10"
android:hint="@string/idtxthint"
android:paddingLeft="15dp"
android:paddingRight="15dp"
android:singleLine="true"
android:textColorHint="#999999"
android:textSize="18sp"
android:textColor="@color/black">

<requestFocus />
</EditText>

<ImageView
android:id="@+id/login_more_user"
android:layout_width="wrap_content"
android:layout_height="44dp"
android:layout_marginRight="15dp"
android:layout_marginTop="5dp"
android:src="@drawable/login_more_up" />
</LinearLayout>

<!-- 横线  -->
<View
android:layout_width="match_parent"
android:layout_height="2dp"
android:background="#CACDD1" />

<EditText
android:id="@+id/login_edtPwd"
android:layout_width="match_parent"
android:layout_height="44dp"
android:background="@null"
android:hint="@string/pwdtxthint"
android:inputType="textPassword"
android:paddingLeft="15dp"
android:paddingRight="0dp"
android:singleLine="true"
android:textColorHint="#999999"
android:textColor="@color/black"/>
<!-- 提示信息的颜色  -->
android:textSize="18sp" />
</LinearLayout>

<Button
android:id="@+id/login_btn"
android:layout_width="fill_parent"
android:layout_height="40dp"
android:layout_marginTop="30dp"
android:background="#ff336699"
android:textColor="@android:color/white"
android:gravity="center"
android:text="登录" />
</LinearLayout>

<TextView
android:id="@+id/register_tv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="注册"
android:textSize="24sp"
android:textColor="@color/white"
android:layout_below="@id/login_linearLayout"
android:layout_marginTop="30dp"
android:layout_alignLeft="@id/login_linearLayout"/>
<TextView
android:id="@+id/loginerror_tv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="忘记密码"
android:textSize="24sp"
android:textColor="@color/white"
android:layout_below="@id/login_linearLayout"
android:layout_marginTop="30dp"
android:layout_alignRight="@id/login_linearLayout"/>

</RelativeLayout>

</RelativeLayout>