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这是你会发现的最愚蠢的问题之一,但在我的 Android 应用程序中,我需要有几个不同的“屏幕”;一个你登录的地方,一个代表一个问题的视图(会有多个问题,所以我需要为每个问题创建一个视图,并在单击下一步按钮时将其更改为下一个视图。让我用一个解释流程图:

用户打开应用程序 -> 登录屏幕 -> 用户登录 -> 查看对问题 1 的自动生成视图的更改 -> 单击下一步按钮 -> 问题 2 -> 完成所有问题 -> 表示您已完成的最终视图。

我创建了两个xml布局文件,一个称为 main,一个称为 quiz(代表一个问题)。

我会详细说明任何需要的。

更新

这是我的两个活动课程:

package me.nrubin29.quiz.student;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class Main extends Activity {
    /**
     * Called when the activity is first created.
     */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        final Button done = (Button) findViewById(R.id.done);
        final EditText serverAddress = (EditText) findViewById(R.id.serverAddress);
        final EditText secretNumber = (EditText) findViewById(R.id.secretNumber);
        final EditText name = (EditText) findViewById(R.id.name);

        done.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                String addr = serverAddress.getText().toString();
                String num = secretNumber.getText().toString();
                String n = name.getText().toString();

                if (addr.equals("") || num.equals("") || n.equals("")) {
                    Toast.makeText(getApplicationContext(), "You didn't fill in all the fields.", Toast.LENGTH_LONG).show();
                    return;
                }

                new Connection().initConnection(Main.this, addr, num, n);
            }
        });
    }
}

package me.nrubin29.quiz.student;

import android.app.Activity;
import android.os.Bundle;
import android.widget.RadioButton;

public class Quiz extends Activity {

    /**
     * Called when the activity is first created.
     */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.quiz);

        final RadioButton radioButton1 = (RadioButton) findViewById(R.id.radioButton);
        final RadioButton radioButton2 = (RadioButton) findViewById(R.id.radioButton1);
        final RadioButton radioButton3 = (RadioButton) findViewById(R.id.radioButton2);
        final RadioButton radioButton4 = (RadioButton) findViewById(R.id.radioButton3);

        radioButton1.setText("Testing!");
    }
}

这是我的两个 XML:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:orientation="vertical"
              android:layout_width="fill_parent"
              android:layout_height="fill_parent"
        >

    <TextView
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:text="Please enter the server address and secret number your teacher gives you."
            />

    <EditText
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:id="@+id/serverAddress" android:layout_gravity="center"
            android:phoneNumber="true"
            android:hint="Server Address"/>
    <EditText
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:id="@+id/secretNumber" android:layout_gravity="center"
            android:phoneNumber="true"
            android:hint="Secret Number"/>

    <Space
        android:layout_width="fill_parent"
        android:layout_height="20px"
        android:id="@+id/space1"/>

    <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Please enter your name."
            android:id="@+id/textView2" android:layout_gravity="left|center_vertical"/>
    <EditText
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:id="@+id/name" android:layout_gravity="left|center_vertical"
            android:hint="Name"/>

    <Space
        android:layout_width="fill_parent"
        android:layout_height="20px"
        android:id="@+id/space"/>

    <Button
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:text="Done"
            android:id="@+id/done" android:layout_gravity="center"/>
</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:orientation="vertical"
              android:layout_width="fill_parent"
              android:layout_height="fill_parent"
        >

    <RadioGroup
        android:layout_width="wrap_content"
        android:layout_height="fill_parent"
        android:layout_gravity="center">

        <TextView
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:text="Question"
            android:id="@+id/textView"/>

        <RadioButton
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="New RadioButton"
            android:id="@+id/radioButton"
            android:layout_gravity="center"/>

        <RadioButton
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:text="New RadioButton"
            android:id="@+id/radioButton1"/>

        <RadioButton
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:text="New RadioButton"
            android:id="@+id/radioButton2"/>

        <RadioButton
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:text="New RadioButton"
            android:id="@+id/radioButton3"/>

    </RadioGroup>
</LinearLayout>

更新!这是我较新的 Connection 类:

package me.nrubin29.quiz.student;

import android.app.Activity;
import android.content.Intent;
import android.widget.Toast;
import me.nrubin29.quiz.student.receivedQuiz.Quiz;

import java.io.EOFException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.net.Socket;

public class Connection {

    private Connection() { }

    private static Connection instance = new Connection();

    public static Connection getInstance() {
        return instance;
    }

    private Quiz quiz;
    private Socket socket;
    private Thread reader;
    private ObjectInputStream inputStream;
    private ObjectOutputStream outputStream;

    public void initConnection(final Activity activity, final String ip, final String port, final String name) {
        new Thread(new Runnable() {
            public void run() {
                try {
                    activity.runOnUiThread(new Runnable() {
                        public void run() {
                            Toast.makeText(activity.getApplicationContext(), "Starting connection to " + ip + ":" + Integer.parseInt(port), Toast.LENGTH_SHORT).show();
                        }
                    });

                    socket = new Socket(ip, Integer.parseInt(port));

                    activity.runOnUiThread(new Runnable() {
                        public void run() {
                            Toast.makeText(activity.getApplicationContext(), "Connected!", Toast.LENGTH_SHORT).show();
                        }
                    });

                    outputStream = new ObjectOutputStream(socket.getOutputStream());

                    inputStream = new ObjectInputStream(socket.getInputStream());

                    outputStream.writeObject(name);

                    quiz = new Quiz((String) inputStream.readObject());

                    Intent i = new Intent(activity, me.nrubin29.quiz.student.Quiz.class);
                    activity.startActivity(i);

                    reader = new Thread(new Runnable() {
                        public void run() {
                            while (true) {
                                try {
                                    Object in = inputStream.readObject();
                                }
                                catch (final EOFException e) { activity.runOnUiThread(new Runnable() { public void run() { Toast.makeText(activity.getApplicationContext(), e.getMessage(), Toast.LENGTH_SHORT).show(); } }); }
                                catch (Exception e) { e.printStackTrace(); }
                            }
                        }
                    });

                    reader.start();
                }
                catch (Exception e) { e.printStackTrace(); }
            }
        }).start();
    }

    public Quiz getQuiz() {
        return this.quiz;
    }
}

As far as the Activity for Quiz, I guess I should make a constructor that takes the question and answers and sets the text of the radio buttons? Also, how exactly (code example would rock) would I create go about answering the question with the code above?
4

2 回答 2

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对于登录Activity,只需使用layout您想要的任何内容和View所需的 s ( Spinner, TextView, Button, 等...)。

如果问题屏幕都相同,那么您可以根据需要使用FragmentsViewPager。这应该可以很好地满足您的需求。这将允许您为每个问题提供新数据,但很容易保持不变layout

VeiwPager 文档

ViewPager 示例我没怎么看,但他的教程通常都不错。

如果ViewPager超过您现在需要/想要的,您可以简单地View为问题设置一个,例如 aTextView并在单击时更改文本Button

编辑

改变你Intent的使用Context

  Intent i = new Intent(activity, Quiz.class);
  activity.startActivity(i);
于 2013-09-23T22:58:10.303 回答
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您可以通过两个不同的活动来实现这一点,每个活动都有不同的内容视图(XML 文件)。默认启动器活动将是带有登录布局文件的登录屏幕。

第二个活动应该是处理问题。这可以使用您的 apt 视图组来完成,例如 RelativeLAyout、LinearLayout、FrameLayout 等。互联网上有很多例子。只需搜索每个教程。

最终视图(您已完成)可以在同一个活动中使用不同的视图或仅使用AlertDialog.

于 2013-09-23T22:58:53.573 回答