一，引入依赖
微信图片_20190515142625.png
二，设计布局
使用了TextInputLayout
微信图片_20190515143009.png
LinearLayout的约束布局比例
微信图片_20190515145037.png
三，代码实现
public class RegisterActivity extends AppCompatActivity {
private volatile int regInfo = 1;
@OnClick(R.id.backthis)
public void backto() {
finish();
}
@BindView(R.id.et_userNm)
EditText et_userNm;
@BindView(R.id.et_pwd)
EditText et_pwd;
@BindView(R.id.et_confimePwd)
EditText et_confirmPwd;
@BindView(R.id.btn_register)
Button btn_register;
@BindView(R.id.lay_userNm)
TextInputLayout lay_userNm;
@BindView(R.id.lay_pwd)
TextInputLayout lay_pwd;
@BindView(R.id.lay_confirmPwd)
TextInputLayout lay_confirmPwd;
@OnClick(R.id.btn_register)
public void do_register(){
/*此处省略提交网站Api写入数据库的逻辑*/
Toast toast = Toast.makeText(RegisterActivity.this, "注册成功，即将跳转登录", Toast.LENGTH_SHORT);
toast.setGravity(Gravity.CENTER,0,0);
toast.show();
//EventBus在此处发送RegIntoEntity，LoginActivity使用EventBus接受这个RegIntoEntity，并填充登录框
EventBus.getDefault().post(new RegIntoEntity(et_userNm.getText().toString(),et_pwd.getText().toString()));
//延迟2秒关闭 RegisterActivity
Observable.timer(2, TimeUnit.SECONDS).subscribe(new Consumer() {
@Override
public void accept(Long aLong) throws Exception {
finish();
}
});
}
@SuppressLint("CheckResult")
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_register);
ButterKnife.bind(this);
RxTextView.textChanges(et_userNm).subscribe(new Consumer() {
@Override
public void accept(CharSequence charSequence) throws Exception {
if (!String.valueOf(charSequence).equals("")) {
if (!checkUserNm(String.valueOf(charSequence))) {
lay_userNm.setError("用户名仅能包含字母、数字、下划线，长度6-10位");
} else {
//异步验证用户名是否已被注册，并更新UI
validateUserNm(String.valueOf(charSequence));
}
} else {
lay_userNm.setError("");
}
}
});
RxTextView.textChanges(et_pwd).subscribe(new Consumer() {
@Override
public void accept(CharSequence charSequence) throws Exception {
if (!String.valueOf(charSequence).equals("")) {
if (!checkPwd(String.valueOf(charSequence))) {
lay_pwd.setError("密码仅能包含字母、数字、下划线，长度6-12位");
} else {
lay_pwd.setError("");
}
} else {
lay_pwd.setError("");
}
}
});
RxTextView.textChanges(et_confirmPwd).subscribe(new Consumer() {
@Override
public void accept(CharSequence charSequence) throws Exception {
if (!et_pwd.getText().toString().equals("")) {
if (!String.valueOf(charSequence).equals(et_pwd.getText().toString())) {
lay_confirmPwd.setError("两次输入密码不一致！");
} else {
lay_confirmPwd.setError("");
}
} else {
lay_confirmPwd.setError("");
}
}
});
Observable
.combineLatest(
RxTextView.textChanges(et_userNm).map(CharSequence::toString),
RxTextView.textChanges(et_pwd).map(CharSequence::toString),
RxTextView.textChanges(et_confirmPwd).map(CharSequence::toString),
new Function3(){
@Override
public Boolean apply(String s1, String s2,String s3) throws Exception {
return checkUserNm(s1) && checkPwd(s2) && checkConfirmPwd(s3);
}
}
).subscribe(new Consumer() {
@Override
public void accept(Boolean aBoolean) throws Exception {
if (aBoolean){
btn_register.setEnabled(true);
} else {
btn_register.setEnabled(false);
}
}
});
}
private boolean checkUserNm (String strUserNm){
//6-10个字符，至少1个字母和1个数字：
return strUserNm.matches("^[a-z][a-zA-Z0-9]{5,9}$");
}
private boolean checkPwd (String strPwd){
//6-12个字符，至少1个字母和1个数字：
return strPwd.matches("^(?=.*[a-zA-Z])(?=.*\\d)[a-zA-Z\\d]{5,11}$");
}
private boolean checkConfirmPwd(String confirmPwd){
return confirmPwd.equals(et_pwd.getText().toString());
}
private void validateUserNm(String loginName) {
new Thread(new Runnable() {
@Override
public void run() {
OkHttpClient client = new OkHttpClient();
JSONObject jsonObject = new JSONObject();
try {
jsonObject.put("loginName",loginName);
} catch (JSONException e) {
e.printStackTrace();
}
RequestBody body = RequestBody.create(WebUtil.mediaType, String.valueOf(jsonObject));
Request request = new Request.Builder()
.url(WebUtil.BASEURL + WebUtil.checkUserNm)
.post(body)
.build();
client.newCall(request).enqueue(new Callback() {
@Override
public void onFailure(Call call, IOException e) {
}
@Override
public void onResponse(Call call, Response response) throws IOException {
if (response.isSuccessful()){
String result = response.body().string();
JSONObject jsonObject = null;
try {
jsonObject = new JSONObject(result);
regInfo = jsonObject.getInt("status");
if (regInfo == -1) {
runOnUiThread(new Runnable() {
@Override
public void run() {
lay_userNm.setError(loginName + "已被使用");
}
});
} else if (regInfo == 1){
runOnUiThread(new Runnable() {
@Override
public void run() {
lay_userNm.setError("");
}
});
}
} catch (JSONException e) {
e.printStackTrace();
}
}
}
});
}
}).start();
}
}