Android實戰簡易教程-第二十三槍（基於Baas的使用者注冊和登入模組實現！）

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接著上兩篇文章。我們基於Bmob提供的API實現使用者登入功能。總體看一下代碼。

1.注冊頁面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="使用者名稱：" />            <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="密碼：" />            <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="注冊" /></RelativeLayout>

2.注冊頁面.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;@Overrideprotected 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, "使用者名稱或密碼不可為空！
", 3).show();} else {BmobQuery<User> query = new BmobQuery<User>();// 查詢類query.addWhereEqualTo("userName", username);// 查詢條件query.findObjects(MainActivity.this, new FindListener<User>() {@Overridepublic void onSuccess(List<User> userlist) {if (userlist.size() == 0) {// 查詢不到，使用者名稱可用User user = new User();user.setUserName(username);user.setUserPassword(password);user.save(MainActivity.this, new SaveListener() {@Overridepublic void onSuccess() {Toast.makeText(MainActivity.this,"注冊成功！跳轉到登入頁面。", 3).show();Intent intent = new Intent();intent.setClass(MainActivity.this, Login.class);intent.putExtra("username", username);startActivity(intent);}@Overridepublic void onFailure(int arg0, String arg1) {Toast.makeText(MainActivity.this, "注冊失敗。", 3).show();}});} else {Toast.makeText(MainActivity.this, "使用者名稱已被注冊！
", 3).show();}}@Overridepublic void onError(int arg0, String arg1) {// TODO Auto-generated method stub}});}}}

3.登入介面.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="使用者名稱：" />            <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="密碼：" />            <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="登入" /></RelativeLayout>

4.登入介面.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;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.login);Bmob.initialize(this, "8f3ffb2658d8a3366a70a0b0ca0b71b2");// 初始化BmobmLoginName = (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() {@Overridepublic 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, "使用者名稱或密碼不可為空！", 3).show();} else {BmobQuery<User> query = new BmobQuery<User>();// 查詢類query.addWhereEqualTo("userName", username);// 查詢條件query.findObjects(Login.this, new FindListener<User>() {@Overridepublic void onSuccess(List<User> userlist) {if (userlist == null) {// 查詢不到。使用者名稱可用Toast.makeText(Login.this, "使用者名稱錯誤！
", 3).show();} else {if (userlist.get(0).getUserPassword().equals(password)) {Toast.makeText(Login.this, "登入成功。", 3).show();Intent intent = new Intent();intent.setClass(Login.this, Success.class);startActivity(intent);} else {Toast.makeText(Login.this, "密碼錯誤！", 3).show();}}}@Overridepublic void onError(int arg0, String arg1) {// TODO Auto-generated method stub}});}}});}}

5.登入成功.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="登入成功！
"/>    </LinearLayout>

6.登入成功.java:

package com.example.logintest;import android.app.Activity;import android.os.Bundle;public class Success extends Activity {@Overrideprotected 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.設定檔：

<?
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.檔案：

10.執行：

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Android實戰簡易教程-第二十三槍（基於Baas的使用者注冊和登入模組實現！）