环信UI开源Demo情景分析五、注册界面

注册界面比较简单，一个账号，两个密码，一个按钮。

        <!-- 注册 -->
        <activity
            android:name=".activity.RegisterActivity"
            android:screenOrientation="portrait"
            android:theme="@style/horizontal_slide" >
        </activity>

/**
	 * 注册
	 * @param view
	 */
	public void register(View view) {
		String st1 = getResources().getString(R.string.User_name_cannot_be_empty);
		String st2 = getResources().getString(R.string.Password_cannot_be_empty);
		String st3 = getResources().getString(R.string.Confirm_password_cannot_be_empty);
		String st4 = getResources().getString(R.string.Two_input_password);
		String st5 = getResources().getString(R.string.Is_the_registered);
		final String st6 = getResources().getString(R.string.Registered_successfully);
		final String username = userNameEditText.getText().toString().trim();
		final String pwd = passwordEditText.getText().toString().trim();
		String confirm_pwd = confirmPwdEditText.getText().toString().trim();
		if (TextUtils.isEmpty(username)) {
			Toast.makeText(this, st1, Toast.LENGTH_SHORT).show();
			userNameEditText.requestFocus();
			return;
		} else if (TextUtils.isEmpty(pwd)) {
			Toast.makeText(this, st2, Toast.LENGTH_SHORT).show();
			passwordEditText.requestFocus();
			return;
		} else if (TextUtils.isEmpty(confirm_pwd)) {
			Toast.makeText(this, st3, Toast.LENGTH_SHORT).show();
			confirmPwdEditText.requestFocus();
			return;
		} else if (!pwd.equals(confirm_pwd)) {
			Toast.makeText(this, st4, Toast.LENGTH_SHORT).show();
			return;
		}

		if (!TextUtils.isEmpty(username) && !TextUtils.isEmpty(pwd)) {
			final ProgressDialog pd = new ProgressDialog(this);
			pd.setMessage(st5);
			pd.show();
			final String st7 = getResources().getString(R.string.network_anomalies);
			final String st8 = getResources().getString(R.string.User_already_exists);
			final String st9 = getResources().getString(R.string.registration_failed_without_permission);
			final String st10 = getResources().getString(R.string.Registration_failed);
			new Thread(new Runnable() {
				public void run() {
					try {
						// 调用sdk注册方法
						EMChatManager.getInstance().createAccountOnServer(username, pwd);
						runOnUiThread(new Runnable() {
							public void run() {
								if (!RegisterActivity.this.isFinishing())
									pd.dismiss();
								// 保存用户名
								DemoApplication.getInstance().setUserName(username);
								Toast.makeText(getApplicationContext(), st6, 0).show();
								finish();
							}
						});
					} catch (final EaseMobException e) {
						runOnUiThread(new Runnable() {
							public void run() {
								if (!RegisterActivity.this.isFinishing())
									pd.dismiss();
								int errorCode=e.getErrorCode();
								if(errorCode==EMError.NONETWORK_ERROR){
									Toast.makeText(getApplicationContext(), st7, Toast.LENGTH_SHORT).show();
								}else if(errorCode==EMError.USER_ALREADY_EXISTS){
									Toast.makeText(getApplicationContext(), st8, Toast.LENGTH_SHORT).show();
								}else if(errorCode==EMError.UNAUTHORIZED){
									Toast.makeText(getApplicationContext(), st9, Toast.LENGTH_SHORT).show();
								}else{
									Toast.makeText(getApplicationContext(), st10 + e.getMessage(), Toast.LENGTH_SHORT).show();
								}
							}
						});
					}
				}
			}).start();

		}
	}

开始都一样，对输入进行验证。

接下来进行注册，先显示一个进度条，然后开启线程，进行注册，在注册的时候如果界面没有关闭则保存用户名后关闭，其中runOnUiThread内部实现跟Handler一样。此处不详讲。对于Handler请看《Android中Looper,Message和Handle之间的简要关系说明》。