Android实战简易教程-第二十三枪（基于Baas的用户注册和登录模块实现！）
接着上两篇文章，我们基于Bmob提供的API实现用户登录功能，整体看一下代码。
1.注册页面xml:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<TableLayout
android:id="@+id/tl"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<TableRow>
<TextView
android:id="@+id/tv_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="用户名：" />
<EditText
android:id="@+id/et_username"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="5"
android:text="" />
</TableRow>
<TableRow>
<TextView
android:id="@+id/tv_password"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="密码：" />
<EditText
android:id="@+id/et_password"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="5"
android:text="" />
</TableRow>
</TableLayout>
<Button
android:id="@+id/register"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@+id/tl"
android:onClick="submit"
android:text="注册" />
</RelativeLayout>
2.注册页面.java:
package com.example.logintest;
import java.util.List;
import org.w3c.dom.UserDataHandler;
import cn.bmob.v3.Bmob;
import cn.bmob.v3.BmobQuery;
import cn.bmob.v3.listener.FindListener;
import cn.bmob.v3.listener.SaveListener;
import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.Menu;
import android.view.View;
import android.widget.EditText;
import android.widget.Toast;
public class MainActivity extends Activity {
private EditText mUserName, mPassword;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Bmob.initialize(this, "8f3ffb2658d8a3366a70a0b0ca0b71b2");
mUserName = (EditText) findViewById(R.id.et_username);
mPassword = (EditText) findViewById(R.id.et_password);
}
public void submit(View view) {
final String username = mUserName.getText().toString();
final String password = mPassword.getText().toString();
if (username.equals("") || password.equals("")) {
Toast.makeText(this, "用户名或密码不能为空！", 3).show();
} else {
BmobQuery<User> query = new BmobQuery<User>();// 查询类
query.addWhereEqualTo("userName", username);// 查询条件
query.findObjects(MainActivity.this, new FindListener<User>() {
@Override
public void onSuccess(List<User> userlist) {
if (userlist.size() == 0) {// 查询不到，用户名可用
User user = new User();
user.setUserName(username);
user.setUserPassword(password);
user.save(MainActivity.this, new SaveListener() {
@Override
public void onSuccess() {
Toast.makeText(MainActivity.this,
"注册成功！跳转到登录页面！", 3).show();
Intent intent = new Intent();
intent.setClass(MainActivity.this, Login.class);
intent.putExtra("username", username);
startActivity(intent);
}
@Override
public void onFailure(int arg0, String arg1) {
Toast.makeText(MainActivity.this, "注册失败！", 3)
.show();
}
});
} else {
Toast.makeText(MainActivity.this, "用户名已被注册！", 3).show();
}
}
@Override
public void onError(int arg0, String arg1) {
// TODO Auto-generated method stub
}
});
}
}
}
3.登录界面.xml：
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<TableLayout
android:id="@+id/tllayout"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<TableRow>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="用户名：" />
<EditText
android:id="@+id/et_usernamelogin"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="5"
android:text="" />
</TableRow>
<TableRow>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="密码：" />
<EditText
android:id="@+id/et_passwordlogin"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:password="true"
android:layout_weight="5"
android:text="" />
</TableRow>
</TableLayout>
<Button
android:id="@+id/login"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@+id/tllayout"
android:text="登录" />
</RelativeLayout>
4.登录界面.java:
package com.example.logintest;
import java.util.List;
import cn.bmob.v3.Bmob;
import cn.bmob.v3.BmobQuery;
import cn.bmob.v3.listener.FindListener;
import cn.bmob.v3.listener.SaveListener;
import android.app.Activity;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
public class Login extends Activity {
private EditText mLoginName, mLoginPassword;
private Button mButtonLogin;
private String username, password;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.login);
Bmob.initialize(this, "8f3ffb2658d8a3366a70a0b0ca0b71b2");// 初始化Bmob
mLoginName = (EditText) findViewById(R.id.et_usernamelogin);
mLoginPassword = (EditText) findViewById(R.id.et_passwordlogin);
mButtonLogin = (Button) findViewById(R.id.login);
Intent intent = getIntent();
username = intent.getStringExtra("username");
mLoginName.setText(username);
mButtonLogin.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
final String username = mLoginName.getText().toString();
final String password = mLoginPassword.getText().toString();
if (username.equals("") || password.equals("")) {
Toast.makeText(Login.this, "用户名或密码不能为空！", 3).show();
} else {
BmobQuery<User> query = new BmobQuery<User>();// 查询类
query.addWhereEqualTo("userName", username);// 查询条件
query.findObjects(Login.this, new FindListener<User>() {
@Override
public void onSuccess(List<User> userlist) {
if (userlist == null) {// 查询不到，用户名可用
Toast.makeText(Login.this, "用户名错误！", 3).show();
} else {
if (userlist.get(0).getUserPassword()
.equals(password)) {
Toast.makeText(Login.this, "登录成功！", 3)
.show();
Intent intent = new Intent();
intent.setClass(Login.this, Success.class);
startActivity(intent);
} else {
Toast.makeText(Login.this, "密码错误！", 3)
.show();
}
}
}
@Override
public void onError(int arg0, String arg1) {
// TODO Auto-generated method stub
}
});
}
}
});
}
}
5.登录成功.xml:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="登录成功！"/>
</LinearLayout>
6.登录成功.java:
package com.example.logintest;
import android.app.Activity;
import android.os.Bundle;
public class Success extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.success);
}
}
7.javabean.java:
package com.example.logintest;
import cn.bmob.v3.BmobObject;
public class User extends BmobObject {
private String userPassword;
public String getUserPassword() {
return userPassword;
}
public void setUserPassword(String userPassword) {
this.userPassword = userPassword;
}
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
private String userName;
}
8.配置文件：
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.logintest"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="17" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.READ_PHONE_STATE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_LOGS" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.example.logintest.MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name="com.example.logintest.Login" >
</activity>
<activity android:name="com.example.logintest.Success" >
</activity>
</application>
</manifest>
9.文件截图：
10.运行截图：
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