Android Java Web实现登录注册（一）——客户端_安卓与web交互实现登陆注册

首先要搭建好Java Web开发环境，详细的方法请看另一篇博文点击打开链接

效果：

一、布局

布局如上图，为了控制篇幅就省略了，共用两个layout的.xml文件

二、Activity

import包的部分省略了

代码：LoginActivity.java

public class LoginActivity extends AppCompatActivity {
 
    EditText id, password;
    Button loginBtn, registerBtn;
    Handler handler;
    static int LOGIN_FAILED = 0;
    static int LOGIN_SUCCEEDED = 1;
    Dialog dialog;
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_login);
        id = (EditText)findViewById(R.id.id);
        password = (EditText)findViewById(R.id.password);
        loginBtn = (Button)findViewById(R.id.loginBtn);
        registerBtn = (Button)findViewById(R.id.registerBtn);
 
        loginBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v){
                if(isConnectingToInternet()){ //检查网络
                    if (id.getText().toString().equals(""))
                        Toast.makeText(LoginActivity.this, "请输入账号", Toast.LENGTH_SHORT).show();
                    else {
                        //启动登录Thread
                        dialog = new Dialog(LoginActivity.this);
                        dialog.setTitle("正在登录，请稍后...");
                        dialog.setCancelable(false);
                        dialog.show();
                        new LoginPostThread(id.getText().toString(),
                                password.getText().toString()).start();
                    }
                }else{
                    Toast.makeText(getApplicationContext(),
                            "网络未连接",Toast.LENGTH_SHORT).show();
                }
            }
        });
 
        registerBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                //跳转到注册Activity
                Intent intent = new Intent(LoginActivity.this,
                        RegisterActivity.class);
                startActivity(intent);
            }
        });
 
        //Handle,Msg返回成功信息，跳转到其他Activity
        handler = new Handler() {
            public void handleMessage(Message msg) {
                super.handleMessage(msg);
                dialog.dismiss();
                if (msg.what == 111) {  // 处理发送线程传回的消息
                    if(msg.obj.toString().equals("SUCCEEDED")){
                        //跳转
                        Toast.makeText(LoginActivity.this, "模拟跳转",