<?xml version="1.0" encoding="utf-8"?>
<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:background="#000000"
    tools:context="com.mingrisoft.Main2Activity">
    <Button
        android:id="@+id/btn2"
        android:layout_width="80dp"
        android:layout_height="50dp"
        android:text="返回"
        android:layout_alignParentTop="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true" />
    <EditText
        android:id="@+id/et_3"
        android:layout_width="match_parent"
        android:layout_height="40dp"
        android:textColor="#870c0c"
        android:hint="请输入金额："
        android:background="#9bc9e1"
        android:textSize="20dp"
        android:layout_marginTop="44dp"
        android:layout_below="@+id/ou_2"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true" />
    <TextView
        android:id="@+id/ou_1"
        android:layout_width="match_parent"
        android:layout_height="40dp"
        android:text="属性"
        android:textColor="#f9f6f6"
        android:textSize="20dp"
        android:layout_above="@+id/btn4"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_marginBottom="41dp"></TextView>
    <TextView
        android:id="@+id/ou_2"
        android:layout_width="match_parent"
        android:layout_height="40dp"
        android:text="金额"
        android:textColor="#f9f6f6"
        android:textSize="20dp"
        android:layout_marginTop="35dp"
        android:layout_below="@+id/btn2"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"></TextView>

    <Button
        android:id="@+id/btn3"
        android:layout_width="match_parent"
        android:layout_height="70dp"
        android:text="支出"
        android:textColor="#f04b4b"
        android:layout_alignParentBottom="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true" />
    <Button
        android:id="@+id/btn4"
        android:layout_width="match_parent"
        android:layout_height="60dp"
        android:text="收入"
        android:textColor="#6597ed"
        android:layout_above="@+id/btn3"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_marginBottom="45dp" />

</RelativeLayout>

package com.mingrisoft;

import android.content.Intent;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.View;

public class Main2Activity extends ActionBarActivity implements View.OnClickListener {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main2);
        initUI();
    }

    private void initUI() {
        findViewById(R.id.btn2).setOnClickListener(this);
        findViewById(R.id.btn3).setOnClickListener(this);
        findViewById(R.id.btn4).setOnClickListener(this);
    }

    @Override
    public void onClick(View view) {
        switch (view.getId()) {
            case R.id.btn2:
                //跳转到EditTextAxctivity界面
                Intent intent = new Intent();
                intent.setClass(getApplicationContext(), EditTextActivity.class);
                startActivity(intent);
                break;
            case R.id.btn3:
                //跳转到OutAxctivity界面
                 intent = new Intent();
                intent.setClass(getApplicationContext(), OutActivity.class);
                startActivity(intent);
                break;
            case R.id.btn4:
                //跳转到InAxctivity界面
                 intent = new Intent();
                intent.setClass(getApplicationContext(), InActivity.class);
                startActivity(intent);
                break;
        }
    }
}