如果答案是错误的android怎么能显示正确的答案？
在 CheckAns 中，如果来自数据或网络API的答案是正确的，那么我想知道答案是否正确无法显示正确的答案。
所以这里的想法在回答问题后会显示当前点级别的级别对话框，所以我想在错误时显示正确的答案 当答案是正确时，应用程序继续下一个问题，但如果错误，应用程序显示当前点对话框。
package com.app.trafficexam;
import android.content.ContentValues;
import android.content.Intent;
import android.os.Build;
import android.os.Bundle;
import android.os.CountDownTimer;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.MenuItem;
import android.view.View;
import android.view.WindowManager;
import android.webkit.WebView;
import android.widget.Button;
import android.widget.ProgressBar;
import android.widget.TextView;
import com.example.db.DatabaseHelper;
import com.example.item.ItemStage;
import com.example.util.Constant;
import com.google.android.gms.ads.AdRequest;
import com.google.android.gms.ads.AdView;
import java.util.ArrayList;
import java.util.concurrent.TimeUnit;
public class PlayQuizActivity extends AppCompatActivity {
WebView web_desc;
private long timeCountInMilliSeconds = (long) (0.50 * 60000);
private enum TimerStatus {
STARTED,
STOPPED
}
private TimerStatus timerStatus = TimerStatus.STOPPED;
private ProgressBar progressBarCircle;
private TextView textViewTime, txt_pointshow;
private CountDownTimer countDownTimer;
Button btnopta, btnoptb, btnoptc, btnoptd;
String str_a, str_b, str_c, str_d, ansright;
private int currentPosition;
int TOTAL_TEXT, points, time;
ArrayList<ItemStage> mListItem;
boolean isTimerOn;
long millisTimerRemains;
DatabaseHelper databaseHelper;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.playquiz_activity);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setDisplayShowHomeEnabled(true);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
getWindow().addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);
getWindow().setStatusBarColor(getResources().getColor(R.color.colorPrimaryDark));
}
setTitle(getString(R.string.app_name));
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setDisplayShowHomeEnabled(true);
AdView mAdView = (AdView) findViewById(R.id.adView);
mAdView.loadAd(new AdRequest.Builder().build());
mListItem = new ArrayList<>();
web_desc = (WebView) findViewById(R.id.text_question);
progressBarCircle = (ProgressBar) findViewById(R.id.progressBarCircle);
textViewTime = (TextView) findViewById(R.id.textViewTime);
txt_pointshow = (TextView) findViewById(R.id.text_point);
btnopta = (Button) findViewById(R.id.btn_optionA);
btnoptb = (Button) findViewById(R.id.btn_optionB);
btnoptc = (Button) findViewById(R.id.btn_optionC);
btnoptd = (Button) findViewById(R.id.btn_optionD);
databaseHelper = new DatabaseHelper(getApplicationContext());
web_desc.setBackgroundColor(0);
web_desc.setFocusableInTouchMode(false);
web_desc.setFocusable(false);
web_desc.getSettings().setDefaultTextEncodingName("UTF-8");
web_desc.getSettings().setDefaultFontSize(18);
isTimerOn = false;
Intent i = getIntent();
currentPosition = i.getIntExtra("POSITION", 0);
TOTAL_TEXT = Constant.arrayList.size() - 1;
setQuestionView(currentPosition);
btnopta.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
str_a = Constant.arrayList.get(currentPosition).getLevelWiseQuesOptA();
CheckAns();
}
});
btnoptb.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
str_b = Constant.arrayList.get(currentPosition).getLevelWiseQuesOptB();
CheckAns();
}
});
btnoptc.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
str_c = Constant.arrayList.get(currentPosition).getLevelWiseQuesOptC();
CheckAns();
}
});
btnoptd.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
str_d = Constant.arrayList.get(currentPosition).getLevelWiseQuesOptD();
CheckAns();
}
});
}
public void CheckAns() {
ansright = Constant.arrayList.get(currentPosition).getLevelWiseQuesAns();
if (ansright.equals(str_a)) {
isAnswerTrue();
startStop();
} else if (ansright.equals(str_b)) {
isAnswerTrue();
startStop();
} else if (ansright.equals(str_c)) {
isAnswerTrue();
startStop();
} else if (ansright.equals(str_d)) {
isAnswerTrue();
startStop();
} else {
Intent intentres = new Intent(PlayQuizActivity.this, ResultActivity.class);
intentres.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(intentres);
stopCountDownTimer();
}
}
private void isAnswerTrue() {
if (currentPosition <= TOTAL_TEXT) {
time = (int) millisTimerRemains;
int point = PointCount(time);
if (!databaseHelper.getFavouriteById(Constant.arrayList.get(currentPosition).getLevelWiseQuesId())) {
ContentValues fav = new ContentValues();
fav.put(DatabaseHelper.KEY_LEVEL_ID, Constant.arrayList.get(currentPosition).getLevelWiseQuesLevelId());
fav.put(DatabaseHelper.KEY_STAGE_ID, Constant.arrayList.get(currentPosition).getLevelWiseQuesId());
fav.put(DatabaseHelper.KEY_TOTAL_POINT, point);
databaseHelper.addFavourite(DatabaseHelper.TABLE_FAVOURITE_NAME, fav, null);
}
if (currentPosition < TOTAL_TEXT) {
if (!databaseHelper.getFavouriteById(Constant.arrayList.get(currentPosition).getLevelWiseQuesId())) {
ContentValues fav = new ContentValues();
fav.put(DatabaseHelper.KEY_LEVEL_ID, Constant.arrayList.get(currentPosition).getLevelWiseQuesLevelId());
fav.put(DatabaseHelper.KEY_STAGE_ID, Constant.arrayList.get(currentPosition).getLevelWiseQuesId());
fav.put(DatabaseHelper.KEY_TOTAL_POINT, point);
databaseHelper.addFavourite(DatabaseHelper.TABLE_FAVOURITE_NAME, fav, null);
}
setQuestionView(currentPosition + 1);
}
else{
Intent intentres = new Intent(PlayQuizActivity.this, ResultActivity.class);
intentres.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(intentres);
stopCountDownTimer();
}
} else {
Intent intentres = new Intent(PlayQuizActivity.this, ResultActivity.class);
intentres.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(intentres);
stopCountDownTimer();
}
}
private void setQuestionView(int positionToMoveTo) {
String mimeType = "text/html";
String encoding = "utf-8";
String htmlText = Constant.arrayList.get(positionToMoveTo).getLevelWiseQuesQuestion();
String text = "<html><head>"
+ "<style type=\"text/css\">@font-face {font-family: MyFont;src: url(\"file:///android_asset/fonts/custom.ttf\")}body{font-family: MyFont;color: #ffffff;text-align:justify}"
+ "</style></head>"
+ "<body>"
+ htmlText
+ "</body></html>";
web_desc.loadDataWithBaseURL(null, text, mimeType, encoding, null);
btnopta.setText(Constant.arrayList.get(positionToMoveTo).getLevelWiseQuesOptA());
btnoptb.setText(Constant.arrayList.get(positionToMoveTo).getLevelWiseQuesOptB());
btnoptc.setText(Constant.arrayList.get(positionToMoveTo).getLevelWiseQuesOptC());
btnoptd.setText(Constant.arrayList.get(positionToMoveTo).getLevelWiseQuesOptD());
currentPosition = positionToMoveTo;
startStop();
}
public int PointCount(int timeremain) {
if (timeremain < 29 && timeremain >= 25) {
points = 5;
txt_pointshow.setText("" + points);
} else if (timeremain < 25 && timeremain >= 20) {
points = 3;
txt_pointshow.setText("" + points);
} else if (timeremain < 20 && timeremain >= 1) {
points = 1;
txt_pointshow.setText("" + points);
}
return points;
}
private void startStop() {
if (timerStatus == TimerStatus.STOPPED) {
setProgressBarValues();
timerStatus = TimerStatus.STARTED;
startCountDownTimer();
} else {
timerStatus = TimerStatus.STOPPED;
stopCountDownTimer();
}
}
private void startCountDownTimer() {
countDownTimer = new CountDownTimer(timeCountInMilliSeconds, 1000) {
@Override
public void onTick(final long millisUntilFinished) {
textViewTime.setText(hmsTimeFormatter(millisUntilFinished));
progressBarCircle.setProgress((int) (millisUntilFinished / 1000));
millisTimerRemains = (millisUntilFinished / 1000);
}
@Override
public void onFinish() {
textViewTime.setText(hmsTimeFormatter(timeCountInMilliSeconds));
setProgressBarValues();
timerStatus = TimerStatus.STOPPED;
//finish();
Intent intentres = new Intent(PlayQuizActivity.this, ResultActivity.class);
intentres.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(intentres);
}
}.start();
countDownTimer.start();
}
private void stopCountDownTimer() {
countDownTimer.cancel();
}
private void setProgressBarValues() {
progressBarCircle.setMax((int) timeCountInMilliSeconds / 1000);
progressBarCircle.setProgress((int) timeCountInMilliSeconds / 1000);
}
private String hmsTimeFormatter(long milliSeconds) {
String hms = String.format("%02d",
TimeUnit.MILLISECONDS.toSeconds(milliSeconds) - TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.toMinutes(milliSeconds)));
return hms;
}
@Override
public boolean onOptionsItemSelected(MenuItem menuItem) {
switch (menuItem.getItemId()) {
case android.R.id.home:
onBackPressed();
return true;
default:
return super.onOptionsItemSelected(menuItem);
}
}
@Override
protected void onDestroy() {
super.onDestroy();
stopCountDownTimer();
}
}
1 个答案:
答案 0 :(得分：0)
我建议如果用户点击错误答案的按钮，只需更改按钮的背景颜色，正确的答案为绿色，错误的答案为红色，然后有一个文本视图，显示所选的答案和正确的答案，如果用户选择了正确的答案，那么只需显示下一个问题：
<强>更新
好的，我创建了一个我正在谈论的简单例子。
首先，您必须创建三个drawable（在res-＆gt; drawable中），它们将是按钮的背景：
- button.xml - ＆gt;灰色（默认背景）
- background button_wrong.xml - ＆gt;阅读背景
- button_correct.xml - ＆gt;绿色背景
<强> button.xml
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_pressed="true">
<shape android:shape="rectangle">
<corners android:radius="3dp" />
<solid android:color="#807676"/>
</shape>
</item>
<item android:state_focused="true">
<shape android:shape="rectangle">
<corners android:radius="3dp" />
<solid android:color="#BCBCBC" />
</shape>
</item>
<item android:state_enabled="false">
<shape android:shape="rectangle">
<corners android:radius="3dp" />
<solid android:color="#807676" />
</shape>
</item>
<item>
<shape android:shape="rectangle">
<corners android:radius="3dp" />
<solid android:color="#BCBCBC" />
</shape>
</item>
</selector>
<强> button_wrong.xml
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_pressed="true">
<shape android:shape="rectangle">
<corners android:radius="3dp" />
<solid android:color="#f46767"/>
</shape>
</item>
<item android:state_focused="true">
<shape android:shape="rectangle">
<corners android:radius="3dp" />
<solid android:color="#ff4040" />
</shape>
</item>
<item android:state_enabled="false">
<shape android:shape="rectangle">
<corners android:radius="3dp" />
<solid android:color="#86ff4040" />
</shape>
</item>
<item>
<shape android:shape="rectangle">
<corners android:radius="3dp" />
<solid android:color="#ff4040" />
</shape>
</item>
</selector>
<强> button_correct.xml
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_pressed="true">
<shape android:shape="rectangle">
<corners android:radius="3dp" />
<solid android:color="#67f47c"/>
</shape>
</item>
<item android:state_focused="true">
<shape android:shape="rectangle">
<corners android:radius="3dp" />
<solid android:color="#40FF5D" />
</shape>
</item>
<item android:state_enabled="false">
<shape android:shape="rectangle">
<corners android:radius="3dp" />
<solid android:color="#8640ff5d" />
</shape>
</item>
<item>
<shape android:shape="rectangle">
<corners android:radius="3dp" />
<solid android:color="#40FF5D" />
</shape>
</item>
</selector>
其次，使用布局上的drawable（button.xml）作为默认按钮背景：
<强> activity_main.xml中
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:padding="20dp"
tools:context="ph.codehood.myapplication.MainActivity">
<TextView
android:id="@+id/textView1"
android:layout_width="match_parent"
android:layout_height="100dp"
android:padding="20dp"
android:text="-- Result will appear here --"
android:textAlignment="center" />
<Button
android:id="@+id/btn1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:background="@drawable/button"
android:text="SELECTION ITEM" />
<Button
android:id="@+id/btn2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:background="@drawable/button"
android:text="SELECTION ITEM" />
<Button
android:id="@+id/btn3"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:background="@drawable/button"
android:text="SELECTION ITEM" />
<Button
android:id="@+id/btn4"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:background="@drawable/button"
android:text="SELECTION ITEM" />
</LinearLayout>
然后最后，实现代码：
<强> MainActivity.java
import android.os.Bundle;
import android.os.Handler;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
public class MainActivity extends AppCompatActivity {
String correctAnswer = "C"; // <= Define the correct answer A, B, C, or D
Button correctButton;
TextView textView1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button btn1 = (Button) findViewById(R.id.btn1);
Button btn2 = (Button) findViewById(R.id.btn2);
Button btn3 = (Button) findViewById(R.id.btn3);
Button btn4 = (Button) findViewById(R.id.btn4);
// Define which button has the correct answer
switch (correctAnswer) {
case "A":
correctButton = btn1;
break;
case "B":
correctButton = btn2;
break;
case "C":
correctButton = btn3;
break;
case "D":
correctButton = btn4;
break;
}
correctButton.setText("CORRECT ANSWER");
textView1 = (TextView) findViewById(R.id.textView1);
btn1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
checkAnswer("A", v);
}
});
btn2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
checkAnswer("B", v);
}
});
btn3.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
checkAnswer("C", v);
}
});
btn4.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
checkAnswer("D", v);
}
});
}
void checkAnswer(String selectionLetter, View v) {
// change background of correct answer to green
correctButton.setBackgroundResource(R.drawable.button_correct);
if (selectionLetter.equals(correctAnswer)) {
textView1.setText("-- Correct Answer, Proceed to next question -- ");
} else {
// change background of correct answer to red
textView1.setText("WRONG ANSWER\nCORRECT IS: " + correctAnswer + "\nSELECTED: " + selectionLetter);
v.setBackgroundResource(R.drawable.button_wrong);
}
resetBackgrounds(v);
}
void resetBackgrounds(final View v) {
// Reset everything after 1.5 sec
Runnable runnable = new Runnable() {
public void run() {
textView1.setText("-- Result will appear here --");
v.setBackgroundResource(R.drawable.button);
correctButton.setBackgroundResource(R.drawable.button);
}
};
Handler handler = new android.os.Handler();
handler.postDelayed(runnable, 1500);
}
}
在单独的Android Studio项目上测试此代码以查看输出。
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