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"
    tools:context="com.example.qwa.MainActivity" >


    <TextView
        android:id="@+id/textView1"
        android:layout_width="300dp"
        android:layout_height="50dp"
        android:layout_above="@+id/textView2"
        android:layout_alignRight="@+id/editText2"
        android:layout_marginBottom="31dp"
        android:background="#6699ff"
        android:text="账号："
        android:textSize="32sp" />

    <TextView
        android:id="@+id/textView2"
        android:layout_width="300dp"
        android:layout_height="50dp"
        android:layout_above="@+id/btn"
        android:layout_alignRight="@+id/editText2"
        android:layout_marginBottom="22dp"
        android:background="#6699ff"
        android:text="密码："
        android:textSize="32sp" />

    <Button
        android:id="@+id/btn"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/textView2"
        android:layout_alignParentBottom="true"
        android:layout_alignRight="@+id/textView2"
        android:layout_marginBottom="139dp"
        android:gravity="center"
        android:onClick="XF"
        android:text="登录"
        android:textSize="32sp" />

    <EditText
        android:id="@+id/editText1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBaseline="@+id/textView1"
        android:layout_alignBottom="@+id/textView1"
        android:layout_alignLeft="@+id/textView1"
        android:layout_marginLeft="84dp"
       android:background="#6699ff"
        android:ems="10"
        android:hint="账号" >


        
        <requestFocus />
    </EditText>

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_above="@+id/textView1"
        android:layout_centerHorizontal="true"
        android:layout_marginBottom="46dp"
        android:text="" />

    <EditText
        android:id="@+id/editText2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBaseline="@+id/textView2"
        android:layout_alignBottom="@+id/textView2"
        android:layout_alignParentRight="true"
        android:ems="10"
        android:inputType="textPassword" />

</RelativeLayout>

package com.example.qq;

import android.support.v7.app.ActionBarActivity;



import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
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);
        
          
    }
    public void XF(View view) {
        switch(view.getId()){
        case R.id.btn:    
        // TODO Auto-generated method stub
        Button btn=(Button)findViewById(R.id.btn);
        EditText editText1 = (EditText)findViewById(R.id.editText1);
        EditText editText2=(EditText)findViewById(R.id.editText2);
        String txt1=editText1.getText().toString();
        String txt2=editText2.getText().toString();
        if (txt1.equals("123456")&& txt2.equals("abc123")) {
            
            Toast.makeText(MainActivity.this, "登录成功", 0).show();
        }else {
            Toast.makeText(MainActivity.this, "登录失败", 0).show();
            
        }
    }

          
    
            
        }

    
          
      
}