第三次作业

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:background="#F0F0F0"
    tools:context="com.example.qqq.MainActivity" >

    <Button
        android:id="@+id/button1"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_alignParentBottom="true"
        android:layout_marginTop="290dp"
        android:layout_marginBottom="90dp"
        android:background="#019858"
        android:text="登录" />

    <ImageView
        android:id="@+id/imageView1"
        android:layout_width="80dp"
        android:layout_height="80dp"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="56dp"
        android:src="@drawable/ic_launcher" />

    
    
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="45dp"
        android:layout_alignLeft="@+id/button1"
        android:layout_below="@+id/imageView1"
        android:layout_marginBottom="210dp"
        android:layout_marginLeft="2dp"
        android:layout_marginTop="34dp"
        android:background="#FFFFFF"
        android:orientation="vertical" >

        <TextView
            android:id="@+id/textView1"
            android:layout_width="40dp"
            android:layout_height="45dp"
            android:gravity="center_vertical"
            android:text="173230106" />

        <EditText
            android:id="@+id/editText1"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:ems="10"
            android:hint="QQ账号"
            <requestFocus />
              </EditText>

    </LinearLayout>
    



    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="45dp"
        android:layout_alignLeft="@+id/button1"
        android:layout_below="@+id/imageView1"
        android:layout_marginBottom="149dp"
        android:layout_marginLeft="2dp"
        android:layout_marginTop="90dp"
        android:background="#FFFFFF"
        android:orientation="vertical" >

        <TextView
            android:id="@+id/textView2"
            android:layout_width="40dp"
            android:layout_height="45dp"
            android:gravity="center_vertical"
            android:text="密码" />
        
         <EditText
            android:id="@+id/editText2"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:ems="10"
             android:hint="密码"
             android:inputType="textEditText2"
           

            <requestFocus />
        </EditText>

    </LinearLayout>

</RelativeLayout>

package com.example.qqq;

import java.security.Principal;
import com.example.qqq.R;

import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;


public class MainActivity extends ActionBarActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Button  button1 =(Button) findViewById(R.id.button1);
        
        button1.setOnClickListener(new View.OnClickListener() {
            TextView textView;
            
            @Override
            public void onClick(View view) {
                 EditText editText1= (EditText) findViewById(R.id.editText1);
                 EditText editText2= (EditText) findViewById(R.id.editText2);
                 String editText11=editText1.getText().toString().trim();
                 String editText21=editText2.getText().toString().trim();
                // TODO Auto-generated method stub
                if("173230106".equals(editText11)&&"congxue625".equals(editText21)){
                Toast.makeText(MainActivity.this,"登录成功",0).show();
            }else{
                Toast.makeText(MainActivity.this,"登录失败",0).show();
            }
            }
        });
    }


    @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;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();
        if (id == R.id.action_settings) {
            return true;
        }
        return super.onOptionsItemSelected(item);
    }
}