RegisterActivity.java

package com.ntp.ui.me;

import android.app.Activity;
import android.os.Bundle;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

import com.ntp.ui.R;
import com.ntp.util.ConstantValue;
import com.ntp.util.MD5Util;
import com.ntp.util.NetworkStateUtil;
import com.loopj.android.http.AsyncHttpClient;
import com.loopj.android.http.RequestParams;
import com.loopj.android.http.JsonHttpResponseHandler;

import org.apache.http.Header;
import org.json.JSONException;
import org.json.JSONObject;

/**
 * 注册
 *
 * @author yanxing
 */
public class RegisterActivity extends Activity {

    private EditText username, password;
    private Button register;
    private AsyncHttpClient asyncHttpClient = new AsyncHttpClient();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_register);
        username = (EditText) findViewById(R.id.username);
        password = (EditText) findViewById(R.id.pwd);
        register = (Button) findViewById(R.id.register);
        username.addTextChangedListener(new TextWatcher() {
            @Override
            public void beforeTextChanged(CharSequence s, int start, int count, int after) {

            }

            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {

            }

            @Override
            public void afterTextChanged(Editable s) {
                RequestParams params = new RequestParams();
                params.put("username", s.toString().trim());
                if (!NetworkStateUtil.isNetworkConnected(getApplicationContext())) {
                    Toast.makeText(getApplicationContext(), "请连接网络再试", Toast.LENGTH_SHORT).show();
                    return;
                }
                asyncHttpClient.post(ConstantValue.PATH_USERNAME_EXIST, params, new JsonHttpResponseHandler() {
                    @Override
                    public void onSuccess(int statusCode, Header[] headers, JSONObject response) {
                        super.onSuccess(statusCode, headers, response);
                        if (response != null) {
                            try {
                                String result = response.getString("result");
                                if (result.equals("exist")) {
                                    Toast.makeText(getApplicationContext(), "该用户名已存在", Toast.LENGTH_SHORT).show();
                                    register.setClickable(false);
                                } else {
                                    register.setClickable(true);
                                }
                            } catch (JSONException e) {
                                e.printStackTrace();
                            }
                        }
                    }
                });
            }
        });
    }


    /**
     * 注册事件
     */
    public void register(View view) {
        if (view.getId() == R.id.register) {
            if (username.getText().toString().trim().equals("")) {
                Toast.makeText(getApplicationContext(), "用户名不能为空", Toast.LENGTH_SHORT).show();
                return;
            } else if (password.getText().toString().trim().equals("")) {
                Toast.makeText(getApplicationContext(), "请输入密码", Toast.LENGTH_SHORT).show();
                return;
            } else {
                RequestParams params = new RequestParams();
                params.put("username", username.getText().toString().trim());
                params.put("password", MD5Util.generatePassword(password.getText().toString().trim()));
                if (!NetworkStateUtil.isNetworkConnected(getApplicationContext())) {
                    Toast.makeText(getApplicationContext(), "请连接网络再试", Toast.LENGTH_SHORT).show();
                    return;
                }
                asyncHttpClient.post(ConstantValue.PATH_REGISTER, params, new JsonHttpResponseHandler() {
                    @Override
                    public void onSuccess(int statusCode, Header[] headers, JSONObject response) {
                        super.onSuccess(statusCode, headers, response);
                        if (response != null) {
                            try {
                                String result = response.getString("result");
                                if (result.equals("success")) {
                                    Toast.makeText(getApplicationContext(), "注册成功", Toast.LENGTH_SHORT).show();
                                    finish();
                                } else {
                                    Toast.makeText(getApplicationContext(), "注册失败，稍后再试", Toast.LENGTH_SHORT).show();
                                }
                            } catch (JSONException e) {
                                e.printStackTrace();
                            }
                        }
                    }
                });
            }
        }
    }
}