Activity的转换

第一个XML代码：
对页面的设计还是相对论来说比较简单的

 <?xml version="1.0" encoding="utf-8"?>
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:tools="http://schemas.android.com/tools"
        android:id="@+id/activity_tiaozhuan"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical"
        tools:context="com.example.messi.tiaozhuanapplication.Tiaozhuan">
    
        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="vertical">
        <EditText
            android:id="@+id/xm"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:hint="@string/xm"
            android:gravity="center"
            android:textAlignment="center"
            android:maxLines="1"
            android:maxLength="4"
            android:layout_marginTop="200dp"/>
    
        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal">
            <Button
              android:id="@+id/btn_getin"
              android:layout_width="0dp"
              android:layout_height="wrap_content"
              android:text="@string/btn_in"
              android:layout_weight="1"/>
            <Button
                android:id="@+id/btn_getout"
                android:layout_width="0dp"
                android:layout_height="wrap_content"
                android:text="@string/btn_out"
                android:layout_weight="1"/>
        </LinearLayout>
        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content">
            <TextView
                android:id="@+id/jieguo"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:text="@string/jieguo"/>
        </LinearLayout>
    </LinearLayout>
    </LinearLayout>
    
    然后就是第一个activity的JAVA代码：
        package com.example.messi.tiaozhuanapplication;

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

public class Tiaozhuan extends AppCompatActivity {

    private EditText xm;
    private Button btn_getin;
    private Button btn_getout;
    private TextView jieguo;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_tiaozhuan);
        xm = (EditText)findViewById(R.id.xm);
        btn_getin = (Button)findViewById(R.id.btn_getin);
        btn_getout = (Button)findViewById(R.id.btn_getout);
        jieguo = (TextView)findViewById(R.id.jieguo);

        String data="";
        Intent intent=getIntent();
        String jg=intent.getStringExtra("result");
        TextView tvresult=(TextView)findViewById(R.id.jieguo);
        data = jg;
        tvresult.setText(data);
    }
    public void onClick(View view){
        switch (view.getId()){
            case R.id.btn_getin:
                    question();
                break;
            case R.id.btn_getout:
                finish();
                break;
        }
    }

    private void question() {
        Intent intent = new Intent();
        intent.setClass(Tiaozhuan.this,pingguActivity.class);
        String text =xm.getText().toString();
        intent.putExtra("name",text+"你是不是对安卓课很有兴趣？");
        startActivity(intent);
    }
}
再然后就是跳转过后进行评估的页面XML代码了，和第一个的设计理念来说并没有太大的区别，主要的困难就是在数据的传输和页面的跳转上


   <?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_pinggu"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.example.messi.tiaozhuanapplication.pingguActivity">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">

        <TextView
            android:id="@+id/wenti"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:gravity="center"
            android:textSize="18sp"
            android:textAlignment="center"
            android:layout_marginTop="200dp"/>

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal">
            <Button
                android:id="@+id/btn_yes"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:layout_weight="1"
                android:text="@string/btn_yes"
                android:textSize="30dp"
                android:onClick="onClick"/>
            <Button
                android:id="@+id/btn_no"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:layout_weight="1"
                android:text="@string/btn_no"
                android:textSize="30dp"
                android:onClick="onClick" />
</LinearLayout>
</LinearLayout>
</LinearLayout>

第二个activity的JAVA代码，主要的类容就是在数据的传输上 
上次的android课我们学到了这一方面  有些不懂得上网查了查


  package com.example.messi.tiaozhuanapplication;

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

public class pingguActivity extends AppCompatActivity {

    private TextView wenti;
    private Button btn_yes;
    private Button btn_no;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_pinggu);
        wenti = (TextView)findViewById(R.id.wenti);
        btn_yes = (Button)findViewById(R.id.btn_yes);
        btn_no = (Button)findViewById(R.id.btn_no);

        String data="";
        Intent intent=getIntent();
        String jg=intent.getStringExtra("name");
        TextView question=(TextView)findViewById(R.id.wenti);
        data = jg;
        question.setText(data);
    }
    public void onClick(View view){
        switch (view.getId()){
            case R.id.btn_yes:
                result1();
                break;
            case R.id.btn_no:
                result2();
                break;
        }
    }

    private void result2() {
        Intent intent = new Intent();
        intent.setClass(pingguActivity.this,Tiaozhuan.class);
        String btn2=btn_no.getText().toString();
        intent.putExtra("result","评估结果："+btn2);
        intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
        startActivity(intent);
    }

    private void result1() {
        Intent intent = new Intent();
        intent.setClass(pingguActivity.this,Tiaozhuan.class);
        String btn1=btn_yes.getText().toString();
        intent.putExtra("result","评估结果："+btn1);
        intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
        startActivity(intent);
    }
}

最后还有一个就是String的代码

<resources>
    <string name="app_name">TiaozhuanApplication</string>
    <string name="xm">请输入姓名</string>
    <string name="btn_in">进入评估</string>
    <string name="btn_out">退出</string>
    <string name="jieguo">评估结果</string>
    <string name="btn_yes">是</string>
    <string name="btn_no">不是</string>
</resources>