Android 如何防止相同的图像重复自身?
我现在正在做一个国旗测试。设置编码,以便玩家每次都会收到一个新的随机标志,玩家必须按4个应答按钮中的1个进行猜测。无论玩家猜对了还是错了,下一个旗子应该加载,同一个国旗不应该重复,直到所有的旗子都显示出来,或者玩家已经失去了所有的生命(=5条生命),游戏重新开始(这部分还没有编程)。然而,事实并非如此。有时,由于一些奇怪的原因,同一个标志会再次出现,但我不知道如何完全防止这种情况 问题: 在显示所有标志之前,如何防止同一标志重新出现 JAVA文件:Android 如何防止相同的图像重复自身?,android,Android,我现在正在做一个国旗测试。设置编码,以便玩家每次都会收到一个新的随机标志,玩家必须按4个应答按钮中的1个进行猜测。无论玩家猜对了还是错了,下一个旗子应该加载,同一个国旗不应该重复,直到所有的旗子都显示出来,或者玩家已经失去了所有的生命(=5条生命),游戏重新开始(这部分还没有编程)。然而,事实并非如此。有时,由于一些奇怪的原因,同一个标志会再次出现,但我不知道如何完全防止这种情况 问题: 在显示所有标志之前,如何防止同一标志重新出现 JAVA文件: public class EasyActiv
public class EasyActivity extends AppCompatActivity {
private final static String Folder = "Easy";
private ImageView flagImageView;
private List<String> countries;
private List<Button> suggestionsBtns;
private int currentCountryIndex;
private final static Random random = new Random ();
TextView currentScoreTextView;
TextView currentLivesTextView;
TextView answerTextViewEasy;
Animation shakeAnimation;
int correctAnswer = 0;
int currentScore = 1;
int currentLives = 5;
@Override
protected void onCreate (Bundle savedInstanceState) {
super.onCreate (savedInstanceState);
setContentView (R.layout.activity_easy);
answerTextViewEasy = (TextView) findViewById(R.id.answerTextViewEasy);
currentScoreTextView = (TextView) findViewById(R.id.currentScoreEasy);
currentLivesTextView = (TextView) findViewById(R.id.currentLivesEasy);
loadCountries ();
initUi ();
try {
randomize ();
} catch (Exception e) {
e.printStackTrace ();
}
}//onCreate ends here
private void randomize () throws Exception {
currentCountryIndex = random.nextInt (countries.size ());
InputStream is = getAssets ().open (Folder + File.separator + countries.get (currentCountryIndex));
flagImageView.setImageBitmap (BitmapFactory.decodeStream (is));
is.close ();
int randomCountry1 = getRandomIndex (countries.size (), currentCountryIndex);
int randomCountry2 = getRandomIndex (countries.size (), currentCountryIndex, randomCountry1);
int randomCountry3 = getRandomIndex (countries.size (), currentCountryIndex, randomCountry1, randomCountry2);
int randomCorrectCountryPos = getRandomIndex (4);
int randomCountry1Pos = getRandomIndex (4, randomCorrectCountryPos);
int randomCountry2Pos = getRandomIndex (4, randomCorrectCountryPos, randomCountry1Pos);
int randomCountry3Pos = getRandomIndex (4, randomCorrectCountryPos, randomCountry1Pos, randomCountry2Pos);
suggestionsBtns.get (randomCorrectCountryPos).setText (countries.get (currentCountryIndex).split (".png")[0]);
suggestionsBtns.get (randomCountry1Pos).setText (countries.get (randomCountry1).split (".png")[0]);
suggestionsBtns.get (randomCountry2Pos).setText (countries.get (randomCountry2).split (".png")[0]);
suggestionsBtns.get (randomCountry3Pos).setText (countries.get (randomCountry3).split (".png")[0]);
}//randomisze ends here
private int getRandomIndex (int size, Integer... excludes) {
List<Integer> excludeList = Arrays.asList (excludes);
int number;
do {
number = random.nextInt (size);
} while (excludeList.contains (number));
return number;
}//getRandomIndex ends here
private void loadCountries () {
countries = new ArrayList<> ();
try {
String [] list = getAssets().list (Folder);
countries = Arrays.asList (list);
} catch (IOException e) {
e.printStackTrace ();
}
}//loadCountries ends here
private void checkCorrectness (String chosenCountry) {
if (chosenCountry.equals (countries.get (currentCountryIndex).split (".png")[0])) {
for (int i = 1; i <= correctAnswer; i++) {
currentScore = currentScore + i;
}//for-loop ends here
correctAnswer++;
currentScore++;
String score = Integer.toString(currentScore);
currentScoreTextView.setText(score);
String answerText = chosenCountry;
answerTextViewEasy.setText(answerText + "!");
answerTextViewEasy.setTextColor(ContextCompat.getColor(getApplicationContext(), R.color.correct_answer));
}else{
currentLives--;
String lives = Integer.toString(currentLives);
currentLivesTextView.setText(lives);
answerTextViewEasy.setText("Incorrect!");
answerTextViewEasy.setTextColor(ContextCompat.getColor(getApplicationContext(), R.color.incorrect_answer));
shakeAnimation = AnimationUtils.loadAnimation(getApplicationContext(), R.anim.incorrect_shake);
shakeAnimation.setRepeatCount(3);
flagImageView.startAnimation(shakeAnimation);
}//else ends here
try {
randomize ();
} catch (Exception e) {
e.printStackTrace ();
}//try-loop ends here
}//checkCorrectness ends here
private void initUi () {
flagImageView = (ImageView)findViewById (R.id.flagImageViewEasy);
suggestionsBtns = new ArrayList<>();
suggestionsBtns.add ((Button)findViewById (R.id.answerButton1Easy));
suggestionsBtns.add ((Button)findViewById (R.id.answerButton3Easy));
suggestionsBtns.add ((Button)findViewById (R.id.answerButton2Easy));
suggestionsBtns.add ((Button)findViewById (R.id.answerButton4Easy));
for (final Button btn : suggestionsBtns) {
btn.setOnClickListener (new View.OnClickListener () {
@Override
public void onClick (View v) {
checkCorrectness (btn.getText ().toString ());
}//onClick ends here
});
}//for-loop ends here
}//initUi ends here
}//EasyActivity ends here
<?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/quizLinearLayoutEasy"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:paddingBottom="16dp"
android:paddingLeft="16dp"
android:paddingRight="16dp"
android:paddingTop="16dp"
tools:context="com.example.android.kingofflags.EasyActivity">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="10dp"
android:layout_marginLeft="5dp"
android:layout_marginStart="5dp"
android:orientation="horizontal">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:orientation="horizontal">
<TextView
android:id="@+id/currentScoreText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="2dp"
android:layout_marginRight="2dp"
android:text="@string/current_score"
android:textColor="@android:color/black"
android:textSize="20sp" />
<TextView
android:id="@+id/currentScoreEasy"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/current_score_0"
android:textColor="@android:color/holo_red_dark"
android:textSize="20sp" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="205dp"
android:layout_marginStart="205dp"
android:orientation="horizontal">
<TextView
android:id="@+id/lives"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="2dp"
android:layout_marginRight="2dp"
android:gravity="center"
android:text="@string/lives"
android:textColor="@android:color/black"
android:textSize="20sp" />
<TextView
android:id="@+id/currentLivesEasy"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/lives_5"
android:textColor="@android:color/holo_red_dark"
android:textSize="20sp" />
</LinearLayout>
</LinearLayout>
<ImageView
android:id="@+id/flagImageViewEasy"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_gravity="center"
android:layout_marginBottom="@dimen/spacing"
android:layout_marginLeft="@dimen/activity_horizontal_margin"
android:layout_marginRight="@dimen/activity_horizontal_margin"
android:layout_marginTop="5dp"
android:layout_weight="1"
android:adjustViewBounds="true"
android:contentDescription="@string/image_description"
android:scaleType="fitCenter" />
<TextView
android:id="@+id/guessCountryTextViewEasy"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:layout_marginBottom="8dp"
android:layout_marginTop="10dp"
android:text="@string/guess_country"
android:textColor="#4c4c4c"
android:textSize="20sp" />
<LinearLayout
android:id="@+id/row1LinearLayoutEasy"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
</LinearLayout>
<LinearLayout
android:id="@+id/row2LinearLayoutEasy"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
</LinearLayout>
<LinearLayout
android:id="@+id/row3LinearLayoutEasy"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="5dp"
android:orientation="horizontal">
<Button
android:id="@+id/answerButton1Easy"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_marginEnd="5dp"
android:layout_marginRight="5dp"
android:layout_weight="1"
android:background="@color/colorAccent"
android:lines="2"
android:text="New Button"
android:textAllCaps="false"
android:textColor="@color/button_text_color"
android:textStyle="bold" />
<Button
android:id="@+id/answerButton2Easy"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:background="@color/colorAccent"
android:lines="2"
android:text="New Button"
android:textAllCaps="false"
android:textColor="@color/button_text_color"
android:textStyle="bold" />
</LinearLayout>
<LinearLayout
android:id="@+id/row4LinearLayoutEasy"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="10dp"
android:orientation="horizontal">
<Button
android:id="@+id/answerButton3Easy"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_marginEnd="5dp"
android:layout_marginRight="5dp"
android:layout_weight="1"
android:background="@color/colorAccent"
android:lines="2"
android:text="New Button"
android:textAllCaps="false"
android:textColor="@color/button_text_color"
android:textStyle="bold" />
<Button
android:id="@+id/answerButton4Easy"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:background="@color/colorAccent"
android:lines="2"
android:text="New Button"
android:textAllCaps="false"
android:textColor="@color/button_text_color"
android:textStyle="bold" />
</LinearLayout>
<TextView
android:id="@+id/answerTextViewEasy"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom|center_horizontal"
android:gravity="center_horizontal"
android:textSize="36sp"
android:textStyle="bold" />
</LinearLayout>
公共类EasyActivity扩展了AppCompative活动{
private final static String Folder=“Easy”;
私有ImageView flagImageView;
私人名单国家;
私人列表建议BTN;
私人指数;
私有最终静态随机=新随机();
TextView当前ScoreTextView;
文本视图currentLivesTextView;
TextView回答TextView轻松;
动画;动画;
int correctAnswer=0;
int currentScore=1;
int currentlifes=5;
@凌驾
创建时受保护的void(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_easy);
answerTextViewEasy=(TextView)findViewById(R.id.answerTextViewEasy);
currentScoreTextView=(TextView)findViewById(R.id.currentScoreEasy);
currentLivesTextView=(TextView)findViewById(R.id.currentLivesEasy);
国家();
initUi();
试一试{
随机化();
}捕获(例外e){
e、 printStackTrace();
}
}//onCreate在此结束
私有void randomize()引发异常{
currentCountryIndex=random.nextInt(countries.size());
InputStream=getAssets().open(Folder+File.separator+countries.get(currentCountryIndex));
flagImageView.setImageBitmap(BitmapFactory.decodeStream(is));
is.close();
int randomCountry1=getRandomIndex(countries.size(),currentCountryIndex);
int randomCountry2=getRandomIndex(countries.size(),currentCountryIndex,randomCountry1);
int randomCountry3=getRandomIndex(countries.size(),currentCountryIndex,randomCountry1,randomCountry2);
int randomCorrectCountryPos=getRandomIndex(4);
int randomCountry1Pos=getRandomIndex(4,randomCorrectCountryPos);
int randomCountry2Pos=getRandomIndex(4,randomCorrectCountryPos,randomCountry1Pos);
int randomCountry3Pos=getRandomIndex(4,randomCorrectCountryPos,randomCountry1Pos,randomCountry2Pos);
suggestionsBtns.get(randomCorrectCountryPos).setText(countries.get(currentCountryIndex).split(“.png”)[0]);
suggestionsBtns.get(randomCountry1Pos).setText(countries.get(randomCountry1.split)(.png”)[0]);
suggestionsBtns.get(randomCountry2Pos).setText(countries.get(randomCountry2.split)(.png”)[0]);
suggestionsBtns.get(randomCountry3Pos).setText(countries.get(randomCountry3).split(“.png”)[0]);
}//随机化到此结束
私有int getRandomIndex(整数大小、整数…排除){
List excludeList=Arrays.asList(排除);
整数;
做{
编号=random.nextInt(大小);
}while(excludeList.contains(number));
返回号码;
}//getRandomIndex到此结束
国家的私营部门(){
国家=新的ArrayList();
试一试{
字符串[]list=getAssets().list(文件夹);
countries=Arrays.asList(列表);
}捕获(IOE异常){
e、 printStackTrace();
}
}//这些国家到此为止
私有void checkcorrection(字符串chosenCountry){
if(chosenCountry.equals(countries.get(currentCountryIndex).split(“.png”)[0])){
对于(int i=1;i保留一个开头为空的整数列表。显示标志时,将其位置保存到此列表中,在显示标志之前,检查此列表内部。如果标志位置在列表内部,则它已显示,请选择另一个。如果列表大小=标志列表大小,则您已显示所有标志。我能想到的方法是在加载国家列表后对其进行随机排序,然后按自己的方式遍历列表。在getRandomIndex
方法的循环中向表达式添加否定(排除标记)。因为现在它会循环,直到在excludeList中出现一个随机数
} while (!excludeList.contains(number));
当您搜索随机整数时,excludeList
中只有一个整数,因此它会搜索一些随机整数,直到找到一个与整数excludeList匹配的整数。因此,您每次都会得到相同的整数值。设置编码,以便播放器每次都会收到一个新的随机标志。
已了解。“每次都将从资产接收新的随机图像”。我尝试了此方法,但不起作用。当我按下进入游戏时,它会变黑。应用程序根本没有响应。因此,你的应用程序存在其他问题。有错误消息吗?这是监视器中显示的所有信息。没有真正的错误消息:它不是error,因此您的逻辑或布局中必须存在错误;)好吧,在这种情况下,我不知道该看什么和在哪里。这有点困难,因为我得到了帮助设置此代码以使随机标志正常工作。我不知道如何着手修复列表。建议?感谢您的回答。我是Android新手,所以如果您有任何编码建议,我将非常感谢您的帮助。我得到了帮助设置此代码(负责显示随机标志和列表t的部分