public class MainActivity extends AppCompatActivity { @BindView(R.id.editText) EditText editText; @BindView(R.id.editText2) EditText editText2; @BindView(R.id.button) Button button; @BindView(R.id.button2) Button button2; @BindView(R.id.activity_main) RelativeLayout activityMain; public static final String REGEX_PASSWORD = "^[a-zA-Z0-9]{6,16}$";//驗證密碼是否有特殊符號或長度不滿6位 private SQLiteDatabase w; private SQLiteDatabase r; private Mysqlist mys; private List<St> mdata; private String name; private String pass; @Override protected void onCreate(Bundle savedInstanceState) {  super.onCreate(savedInstanceState);  setContentView(R.layout.activity_main);  ButterKnife.bind(this);  mys = new Mysqlist(this, "zhu_c", null, 1);//使用halper創建數據庫  r=mys.getReadableDatabase();  w=mys.getWritableDatabase();  mdata=new ArrayList<St>();  Cursor query = r.rawQuery("select * from user_mo", null);  while(query.moveToNext()){   int index1 = query.getColumnIndex("name");   int index2 = query.getColumnIndex("pass");   name = query.getString(index1);   pass = query.getString(index2);   mdata.add(new St(0, name, pass));  } } @OnClick({R.id.button, R.id.button2}) public void onViewClicked(View view) {  switch (view.getId()) {   case R.id.button:    String name1 = editText.getText().toString().trim();    String pass1 = editText2.getText().toString().trim();    if (name1.equals(name)&&pass1.equals(pass)){     Toast.makeText(this,"登錄成功",Toast.LENGTH_SHORT).show();     Intent intent = new Intent(this, UserActivity.class);     startActivity(intent);    }else{     Toast.makeText(this,"賬號與密碼輸入不正確",Toast.LENGTH_SHORT).show();    }    break;   case R.id.button2:    Intent intent1 = new Intent(this, ZhuActivity.class);    startActivity(intent1);    break;  } }}

public class Mysqlist extends SQLiteOpenHelper { private String sql="create table if not exists user_mo(_id Integer primary key autoincrement,name varchar(30) not null,pass varchar(50) not null)"; public Mysqlist(Context context, String name, SQLiteDatabase.CursorFactory factory, int version) {  super(context, name, factory, version); } @Override public void onCreate(SQLiteDatabase db) {  db.execSQL(sql); } @Override public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {  // TODO Auto-generated method stub }}

public class ZhuActivity extends AppCompatActivity { @BindView(R.id.editText3) EditText editText3; @BindView(R.id.editText4) EditText editText4; @BindView(R.id.button3) Button button3; @BindView(R.id.activity_zhu) RelativeLayout activityZhu; public static final String REGEX_PASSWORD = "^[a-zA-Z0-9]{6,16}$";//驗證密碼是否有特殊符號或長度不滿6位 private SQLiteDatabase sdb; private Mysqlist mys; @Override protected void onCreate(Bundle savedInstanceState) {  super.onCreate(savedInstanceState);  setContentView(R.layout.activity_zhu);  ButterKnife.bind(this);  mys = new Mysqlist(this, "zhu_c", null, 1);//使用halper創建數據庫  sdb=mys.getWritableDatabase(); } @OnClick(R.id.button3) public void onViewClicked() {  //獲得賬號密碼  String name = editText3.getText().toString().trim();  String pass = editText4.getText().toString().trim();  if (name == null || "".equals(name) || pass == null || "".equals(pass)) {   Toast.makeText(this, "賬號與密碼不能為空", Toast.LENGTH_SHORT).show();  } else {   String number = editText3.getText().toString();   boolean judge = isMobile(number);   String pa = editText4.getText().toString();   boolean judge1 = isPassword(pa);   if (judge == true && judge1 == true) {    Toast.makeText(this, "注冊成功", Toast.LENGTH_SHORT).show();    sdb.execSQL("insert into user_mo(name,pass)values('"+name+"','"+pass+"')");    Intent intent = new Intent(this, MainActivity.class);    startActivity(intent);//啟動跳轉   } else {    Toast.makeText(this, "手機號碼不法與密碼不能有特殊符號", Toast.LENGTH_SHORT).show();   }  } } /**  * 校驗密碼  * @param password  * @return 校驗通過返回true，否則返回false  */ public static boolean isPassword(String password) {  return Pattern.matches(REGEX_PASSWORD, password); } /**  * 驗證手機格式  */ public static boolean isMobile(String number) { /* 移動：134、135、136、137、138、139、150、151、157(TD)、158、159、187、188 聯通：130、131、132、152、155、156、185、186 電信：133、153、180、189、（1349衛通） 總結起來就是第一位必定為1，第二位必定為3或5或8，其他位置的可以為0-9 */  String num = "[1][358]//d{9}";//"[1]"代表第1位為數字1，"[358]"代表第二位可以為3、5、8中的一個，"//d{9}"代表后面是可以是0～9的數字，有9位。  if (TextUtils.isEmpty(number)) {   return false;  } else {   //matches():字符串是否在給定的正則表達式匹配   return number.matches(num);  } }}

public class St { private int id; private String name; private String pass; public St(int id, String name, String pass) {  this.id = id;  this.name = name;  this.pass = pass; } public int getId() {  return id; } public void setId(int id) {  this.id = id; } public String getName() {  return name; } public void setName(String name) {  this.name = name; } public String getPass() {  return pass; } public void setPass(String pass) {  this.pass = pass; } @Override public String toString() {  return "St{" +    "id=" + id +    ", name='" + name + '/'' +    ", pass='" + pass + '/'' +    '}'; }}

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:id="@+id/activity_zhu" android:layout_width="match_parent" android:layout_height="match_parent" android:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" tools:context="sizu.wxrkaoqianmomi.ZhuActivity"> <EditText  android:layout_width="wrap_content"  android:layout_height="wrap_content"  android:inputType="textPersonName"  android:hint="輸入手機號"  android:gravity="center"  android:ems="10"  android:layout_alignParentTop="true"  android:layout_centerHorizontal="true"  android:layout_marginTop="57dp"  android:id="@+id/editText3" /> <EditText  android:layout_width="wrap_content"  android:layout_height="wrap_content"  android:inputType="textPersonName"  android:hint="輸入密碼"  android:gravity="center"  android:ems="10"  android:layout_below="@+id/editText3"  android:layout_alignLeft="@+id/editText3"  android:layout_alignStart="@+id/editText3"  android:layout_marginTop="44dp"  android:id="@+id/editText4" /> <Button  android:text="注冊"  android:layout_width="wrap_content"  android:layout_height="wrap_content"  android:layout_below="@+id/editText4"  android:layout_centerHorizontal="true"  android:layout_marginTop="88dp"  android:id="@+id/button3" /></RelativeLayout>

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:id="@+id/activity_main" android:layout_width="match_parent" android:layout_height="match_parent" android:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" tools:context="sizu.wxrkaoqianmomi.MainActivity"> <EditText  android:layout_width="wrap_content"  android:layout_height="wrap_content"  android:inputType="textPersonName"  android:hint="輸入手機號"  android:gravity="center"  android:ems="10"  android:layout_alignParentTop="true"  android:layout_centerHorizontal="true"  android:layout_marginTop="33dp"  android:id="@+id/editText" /> <EditText  android:layout_width="wrap_content"  android:layout_height="wrap_content"  android:inputType="textPassword"  android:ems="10"  android:hint="輸入密碼"  android:gravity="center"  android:layout_marginTop="24dp"  android:id="@+id/editText2"  android:layout_below="@+id/editText"  android:layout_alignLeft="@+id/editText"  android:layout_alignStart="@+id/editText" /> <Button  android:text="登錄"  android:layout_width="wrap_content"  android:layout_height="wrap_content"  android:layout_below="@+id/editText2"  android:layout_alignLeft="@+id/editText2"  android:layout_alignStart="@+id/editText2"  android:layout_marginTop="85dp"  android:id="@+id/button" /> <Button  android:text="注冊"  android:layout_width="wrap_content"  android:layout_height="wrap_content"  android:layout_alignTop="@+id/button"  android:layout_alignRight="@+id/editText2"  android:layout_alignEnd="@+id/editText2"  android:id="@+id/button2" /></RelativeLayout>