我创建了一个不同级别的问答游戏,每个级别都包含一个问题。我没有用数据库创建它。我刚刚用过字符串。当用户在第一级回答问题时,他被带到第二级,但当用户返回到第一级时,即使他之前已经解决了,他也必须再次输入答案。无论如何在JAVA中保持答案在类型面板中(如果用户解决了它)而不必创建数据库?此外,在键入类型面板时,用户必须删除“在此处键入...”然后回答。无论如何,当用户点击键入“在这里输入...”时会自动删除吗?
这是我的第一级activity.xml:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/background"
android:weightSum="1"
android:textAlignment="center"
android:id="@+id/level1">
<TextView
android:layout_width="300dp"
android:layout_height="200dp"
android:text="What has 88 keys but cannot open a single door?"
android:id="@+id/que1"
android:width="255dp"
android:textSize="30dp"
android:layout_margin="50dp"
android:textStyle="italic"
android:gravity="center" />
<EditText
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/type1"
android:layout_gravity="center_horizontal"
android:text="Type here..." />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Check answer..."
android:id="@+id/check1"
android:layout_gravity="center_horizontal" />
</LinearLayout>
这是我的Oneactivity.java
package com.golo.user.gaunkhanekatha;
import android.app.Activity;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
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.Toast;
import android.os.Handler;
public class OneActivity extends Activity {
public SharedPreferences preferences; //ADDED THIS LINE
public Button check;
public EditText typeh;
private Toast toast;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_one);
toast = Toast.makeText(OneActivity.this, "", Toast.LENGTH_SHORT);
check = (Button)findViewById(R.id.check1); //R.id.button is the id on your xml
typeh = (EditText)findViewById(R.id.type1); //this is the EditText id
check.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// Perform action on click
//Here you must get the text on your EditText
String Answer = (String) typeh.getText().toString(); //here you have the text typed by the user
//You can make an if statement to check if it's correct or not
if(Answer.equals("Piano") || (Answer.equals("Keyboard")))
{
preferences = PreferenceManager.getDefaultSharedPreferences(v.getContext());
SharedPreferences.Editor editor = preferences.edit();
editor.putInt("Level 1 question 1 ", 1); //Depends of the level he have passed.
editor.apply();
///Correct Toast
toast.setText("Correct");
toast.setGravity(Gravity.TOP | Gravity.LEFT, 500, 300);
toast.show();
Intent i = new Intent(OneActivity.this, TwoActivity.class);
startActivity(i);
finish();
}
else{
//It's not the correct answer
toast.setText("Wrong! Try again...");
toast.show();
}
}
});
}
@Override
protected void onDestroy() {
super.onDestroy();
if(toast!= null) {
toast.cancel();
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_aboutus, 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();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
此外,烤面包显示在键盘的位置。无论如何都要将吐司屏幕移动到屏幕上清晰可见的位置?
答案 0 :(得分:1)
我会给你两种方法:
按如下方式创建LevelEarned
课程:
public class LevelEarned {
public static int level = 0;
}
每当您获得Intent
时(因为用户已正确回答了问题),只需输入:
LevelEarned.level = 1; // 1 depends with the level you have answered correctly
我使用的最佳方法是SharedPreferences
您可以使用SharedPreferences保存任何原始数据:布尔值,浮点数,整数,长整数和字符串。这些数据将在用户会话中持续存在(即使您的应用程序被终止)。
您要做的第一件事就是将这些数据存储在SharedPreferences
上,然后使用Editor
执行此操作,如下所示:
SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(v.getContext());
SharedPreferences.Editor editor = preferences.edit();
editor.putInt("player_level",1); //Depends of the level he have passed.
editor.apply();
我想你会在用户接受问题时立即执行此操作,因此,您将在Button click
上执行该操作,因此您必须作为上下文v.getContext()
传递如果您不在ButtonClick
,并且您在onCreate()
,请致电this
,以便推荐您的context
。
要获取存储的数据(级别),您需要执行此操作:
SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(this);
int level = preferences.getInt("player_level", 0);
让我们向您解释一下。
第一个参数是找到SharedPreference
的关键,因此它不会发生变化,第二个参数是默认值,如果它不是&#39 ;找不到任何"player_level"
SharedPreferences
。
希望继续使用您的代码有助于您:)
将SharedPreferences preferences
创建为全局变量,如下所示:
public SharedPreferences preferences;
然后在onClick()
方法内添加这些通道:
check.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// Perform action on click
//Here you must get the text on your EditText
String Answer = (String) typeh.getText().toString(); //here you have the text typed by the user
//You can make an if statement to check if it's correct or not
if(Answer.equals("4") || (Answer.equals("four")))
{
preferences = PreferenceManager.getDefaultSharedPreferences(v.getContext());
SharedPreferences.Editor editor = preferences.edit();
editor.putInt("player_level",1); //Depends of the level he have passed.
editor.apply();
//Create a Toast because it's correct
Toast.makeText(OneActivity.this, "Correct!",
Toast.LENGTH_LONG).show();
}
else{
//It's not the correct answer
Toast.makeText(OneActivity.this, "Wrong! Try Again",
Toast.LENGTH_LONG).show();
}
}
});
你想知道你只需要知道的等级:
SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(this);
int level = preferences.getInt("player_level", 0); //level is the current level of the player.
按如下方式创建一个类:
public static class LevelPlayer(){
public int static getLevelPlayer(){
SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(this);
int level = preferences.getInt("player_level", 0); //level is the current level of the playe
return level;
}
}
每当你想询问你所做的球员的等级时:
int Level = LevelPlayer.getLevelPlayer(); //that's the level
所以在每个问题之后你都可以询问关卡并提出下一个问题。
我做了一些更改,删除了你的lvl类并输入了这段代码:
public class lvl{
public Context mcontext;
public lvl(Context context){
this.mcontext = context;
}
public int getLevelPlayer(){
SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(mcontext);
int level = preferences.getInt("player_level", 0); //level is the current level of the playe
return level;
}
然后在你的MainActivity
(或者你必须知道玩家等级的哪个位置),你必须把它放在:
public levelplayer mlevelplayer;
然后在你的onCreate()
内加上这个:
mlevelplayer = new levelplayer(this);
int level = mlevelplayer.getLevelPlayer();
答案 1 :(得分:0)
您可以使用SharedPreferences 写入共享首选项
SharedPreferences sharedPref = context.getPreferences(Context.MODE_PRIVATE);
SharedPreferences.Editor editor = sharedPref.edit();
editor.putInt(getString(R.string.saved_high_score), newHighScore);
editor.commit();
阅读
SharedPreferences sharedPref = getActivity().getPreferences(Context.MODE_PRIVATE);
int defaultValue = getResources().getInteger(R.string.saved_high_score_default);
long highScore = sharedPref.getInt(getString(R.string.saved_high_score), defaultValue);
答案 2 :(得分:0)
请记住,您应该采用某种结构方式:json,xml,序列化类。使用
将来工作要简单得多答案 3 :(得分:0)
您可以尝试一些选项。
一个选项是@Stultuske说,您可以尝试存储在用户设备上的XML或TXT文件。这个(以及数据库)将在应用程序会话之间保持不变。
你拥有的另一个选择是你可以创建一个单例类。 例如,一个名为Globals的类(如下所示):
public class Globals {
private static Globals instance;
private String questionOneAnswer;
private Globals(){}
public String getQuestionOne()
{
return this.questionOneAnswer;
}
public void setQuestionOne(String questionOne)
{
this.questionOneAnswer = questionOne;
}
public static synchronized Globals getInstance()
{
if(instance==null)
{
instance=new Globals();
}
return instance;
}
}
然后可以使用Globals g = Globals.getInstance();
调用此方法。这只会在您的应用程序实例中持续存在;但是,如果您希望在整个应用程序启动期间存储它,您可以尝试@shaikhmanzoor所述的XML / TXT或SharedPreferences。
习惯上用camelCase定义变量名称 - 即answers
而不是Answers
,或typeH
而不是typeh
。请查看here以获取Google Java编码指南。
答案 4 :(得分:0)
对于您的第一个问题,只需使用SharedPreferences来保存和获取这样的数据
SharedPreferences sharedPref = context.getPreferences(Context.MODE_PRIVATE);
SharedPreferences.Editor editor = sharedPref.edit();
editor.putInt("level_no_answer", answer_given_by_user);
editor.commit();
对于你的第二个问题,你使用的是android:text =&#34;在这里输入...&#34;在EditText中。只需用android替换该行:hint =&#34;在此输入...&#34;