Android基础知识学习——界面转换（完善）

MainActivity:

package com.example.xinwen;

import android.os.Bundle;

import android.app.Activity;

import android.content.Intent;

import android.view.Menu;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.EditText;

public class MainActivity extends Activity {

private Button bt;

private EditText st1,st2;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

bt=(Button)findViewById(R.id.denglu);

st1=(EditText)findViewById(R.id.zhanghu);

st2=(EditText)findViewById(R.id.mima);

bt.setOnClickListener(new OnClickListener(){

@Override

public void onClick(View arg0) {

// TODO Auto-generated method stub

String usename=st1.getText().toString();

String pwd=st2.getText().toString();

if(usename.equals("zhangsan") && pwd.equals("zhangsan"))

{

Intent in=new Intent (MainActivity.this,FirstActivity.class);

startActivity(in);

}

}

private void elsif(boolean b) {

// TODO Auto-generated method stub

}});

}

@Override

public boolean onCreateOptionsMenu(Menu menu) {

// Inflate the menu; this adds items to the action bar if it is present.

getMenuInflater().inflate(R.menu.main, menu);

return true;

}

}

FirstActivity:

package com.example.xinwen;

import android.os.Bundle;

import android.app.Activity;

import android.view.Menu;

public class FirstActivity extends Activity {

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_first);

}

@Override

public boolean onCreateOptionsMenu(Menu menu) {

// Inflate the menu; this adds items to the action bar if it is present.

getMenuInflater().inflate(R.menu.first, menu);

return true;

}

}