在我的应用程序中，用户通过单击2个按钮之一来回答问题。
这些按钮在布局中彼此相邻排列。但是对于每个新问题，我不希望每次两个按钮在同一个地方。即有时按钮1在左侧，有时则在右侧。
我想这样做，以便用户不习惯正确答案/按钮的位置。
我该怎么办？
当前代码：
public class Stroop extends ActionBarActivity implements View.OnClickListener {
HashMap<String, Integer> colors = new HashMap<>();
// putting the strings and color vals of the hashmap to an array
Object stringOnScreen[];
Object colorsOnScreen[];
// declare vars
TextView color;
Button btn1;
Button btn2;
TextView result;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.stroop);
setUpGame();
btn2.setOnClickListener(this);
btn1.setOnClickListener(this);
stringOnScreen = colors.keySet().toArray();
colorsOnScreen = colors.values().toArray();
setUpQuestion();
Log.d("Length", "Length string: " + stringOnScreen.length);
Log.d("Length", "Length color: " + colorsOnScreen.length);
}// oncreate end
public void setUpQuestion() {
int randString = new Random().nextInt(stringOnScreen.length);
int randColor = new Random().nextInt(colorsOnScreen.length);
Log.d("ranString", "randString: " + randString);
Log.d("rancolor", "randcolor: " + randColor);
// set the text of the string in textview for user to see
color.setText("" + stringOnScreen[randString]);
color.setTextColor((int) colorsOnScreen[randColor]);
btn1.setText("" + stringOnScreen[randString]); //Set btn1 to the string val
//Note: uncomment below if the solution under doesnt work
//btn2.setText("" + colorsOnScreen[randColor].toString()); // set btn2 to the color of the String
setBtn2Text();
// //logic to see if answer is correct, currently commented out to try answer from SO
//
// if(btn2.getText().equals(convertColorIntToString(color.getCurrentTextColor()))){
//
// result.setText("Correct");
// }
//
// //trace code
// Log.d("colortrace", " " + convertColorIntToString(color.getCurrentTextColor()));
//trace to check SO method of logic is working
Log.d("bool", " " + checkForMatchBtn2(btn2));
}
public void setUpGame() {
// setting up the hashmap
colors.put("Green", Color.GREEN);
colors.put("Blue", Color.BLUE);
colors.put("Red", Color.RED);
colors.put("Yellow", Color.YELLOW);
colors.put("Black", Color.BLACK);
// setting up vars
color = (TextView) findViewById(R.id.tvStroopColor);
btn1 = (Button) findViewById(R.id.btnStroop1);
btn2 = (Button) findViewById(R.id.btnStroop2);
result = (TextView) findViewById(R.id.tvStroopResults);
}
public void setBtn2Text(){
switch(color.getCurrentTextColor()){
case Color.GREEN:
btn2.setText("Green");
break;
case Color.RED:
btn2.setText("Red");
break;
case Color.BLUE:
btn2.setText("Blue");
break;
case Color.YELLOW:
btn2.setText("Yellow");
break;
case Color.BLACK:
btn2.setText("Black");
break;
}
}
public void onClick(View v){
if(v.getId() == R.id.btnStroop2){
if(checkForMatchBtn2(btn2))
result.setText("Correct!");
else
result.setText("Wrong!");
}
if(v.getId() == R.id.btnStroop1){
if(checkForMatchBtn1(btn1))
result.setText("Correct!");
else
result.setText("Wrong!");
}
}
public boolean checkForMatchBtn2(Button btn2){
if(color.getCurrentTextColor() == Color.GREEN && btn2.getText().equals("Green"))
return true;
else if(color.getCurrentTextColor() == Color.RED && btn2.getText().equals("Red"))
return true;
else if(color.getCurrentTextColor() == Color.BLACK && btn2.getText().equals("Black"))
return true;
else if(color.getCurrentTextColor() == Color.YELLOW && btn2.getText().equals("Yellow"))
return true;
else if(color.getCurrentTextColor() == Color.BLUE && btn2.getText().equals("Blue"))
return true;
else
return false;
}
public boolean checkForMatchBtn1(Button btn1){
if(color.getCurrentTextColor() == Color.GREEN && btn1.getText().equals("Green"))
return true;
else if(color.getCurrentTextColor() == Color.RED && btn1.getText().equals("Red"))
return true;
else if(color.getCurrentTextColor() == Color.BLACK && btn1.getText().equals("Black"))
return true;
else if(color.getCurrentTextColor() == Color.YELLOW && btn1.getText().equals("Yellow"))
return true;
else if(color.getCurrentTextColor() == Color.BLUE && btn1.getText().equals("Blue"))
return true;
else
return false;
}
}
当前布局：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<TextView
android:id="@+id/tvStroopColor"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:paddingBottom="3dp"
android:text="meditation "
android:textSize="40dp" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<Button
android:id="@+id/btnStroop1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text=" "
android:layout_gravity="center" />
<Button
android:id="@+id/btnStroop2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/text_to_set"
android:text=" "
android:layout_gravity="center" />
</LinearLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<TextView
android:id="@+id/tvStroopResults"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:paddingBottom="3dp"
android:text=" "
android:textSize="25dp" />
<TextView
android:id="@+id/tvStroopScore"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:paddingBottom="3dp"
android:text=" "
android:textSize="25dp"
android:layout_below="@+id/tvStroopResults"
/>
<TextView
android:id="@+id/tvStroopSeeMeditation"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingBottom="3dp"
android:text=" "
android:textSize="25dp"
android:layout_below="@+id/tvStroopScore"
/>
<TextView
android:id="@+id/tvStroopSeeAttention"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text=" "
android:textSize="25dp"
android:layout_below="@+id/tvStroopSeeMeditation"
/>
<EditText
android:id="@+id/etStroopCountdown"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:ems="10"
android:hint=" "
android:layout_below="@+id/tvStroopSeeAttention" >
</EditText>
</RelativeLayout>
</LinearLayout>
尝试解决方案：
private Random random = new Random();
public void setUpGame() {
// setting up the hashmap
colors.put("Green", Color.GREEN);
colors.put("Blue", Color.BLUE);
colors.put("Red", Color.RED);
colors.put("Yellow", Color.YELLOW);
colors.put("Black", Color.BLACK);
// setting up vars
color = (TextView) findViewById(R.id.tvStroopColor);
// btn1 = (Button) findViewById(R.id.btnStroop1);
// btn2 = (Button) findViewById(R.id.btnStroop2);
//
result = (TextView) findViewById(R.id.tvStroopResults);
showScore = (TextView) findViewById(R.id.tvStroopScore);
seeMed = (TextView) findViewById(R.id.tvStroopSeeMeditation);
seeAtt = (TextView) findViewById(R.id.tvStroopSeeAttention);
tenSecs= MediaPlayer.create(Stroop.this, R.raw.tenseconds);
countdown= (EditText) findViewById(R.id.etStroopCountdown);
int[] buttons = new int[]{R.id.btnStroop1, R.id.btnStroop2};
int first = random.nextInt(1);
btn1 = (Button) findViewById(buttons[first]);
btn2 = (Button) findViewById(buttons[1-first]);
}
编辑2：
public void onClick(View v){
// if(v.getId() == R.id.btnStroop2){
if(checkForMatchBtn2((Button) v)){
result.setText("Correct!");
result.setTextColor(Color.GREEN);
score++;
}
else{
result.setText("Wrong!");
result.setTextColor(Color.RED);
}
//set up the question again
setUpQuestion();
// }
// if(v.getId() == R.id.btnStroop1){
if(checkForMatchBtn1((Button) v)){
result.setText("Correct!");
result.setTextColor(Color.GREEN);
score++;
}
else{
result.setText("Wrong!");
result.setTextColor(Color.RED);
}
//set up the question again
setUpQuestion();
// }
}//end of onclick
CURRENT ONCLICK METHOD：
//THIS MAY NEED TO BE CHANGED!!
public void onClick(View v) {
if (v.getId() == R.id.btnStroop2) {
if (checkForMatchBtn2((Button) v)) {
result.setText("Correct!");
result.setTextColor(Color.GREEN);
score++;
} else {
result.setText("Wrong!");
result.setTextColor(Color.RED);
}
// set up the question again
setUpQuestion();
}
if (v.getId() == R.id.btnStroop1) {
if (checkForMatchBtn1((Button) v)) {
result.setText("Correct!");
result.setTextColor(Color.GREEN);
score++;
} else {
result.setText("Wrong!");
result.setTextColor(Color.RED);
}
// set up the question again
setUpQuestion();
}
}// end of onclick
最近编辑：
public class Stroop extends Activity implements View.OnClickListener {
HashMap<String, Integer> colors = new HashMap<>();
// putting the strings and color vals of the hashmap to an array
Object stringOnScreen[];
Object colorsOnScreen[];
// declare vars
TextView color;
Button btn1;
Button btn2;
TextView result;
TextView showScore;
TextView seeMed;
TextView seeAtt;
int score=0;
MediaPlayer tenSecs;
// vars related to neurosky
BluetoothAdapter bluetoothAdapter;
TGDevice device;
TGEegPower eegPower;
final boolean rawEnabled = true;
List<Integer> meditationValues = new ArrayList<Integer>();
int averageMedLevel;
int totalofMedLevels;
int medCount = 0;
int medMax;
// for attention
List<Integer> AttentionValues = new ArrayList<Integer>();
int averageAttLevel;
int totalofAttLevels;
int attCount = 0;
int attMax;
// used for displaying seconds left
EditText countdown;
// in relation to saving values to file
List<TGEegPower> medPoints = new ArrayList<TGEegPower>();
File dir;
int medValueToWrite;
int attValueToWrite;
// in relation to the results display in next activity
ArrayList<Score> singleScore;
Score single;
private Random random = new Random();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.stroop);
setUpGame();
stringOnScreen = colors.keySet().toArray();
colorsOnScreen = colors.values().toArray();
setUpQuestion();
btn2.setOnClickListener(this);
btn1.setOnClickListener(this);
}// oncreate end
public void setUpQuestion() {
int[] buttons = new int[]{R.id.btnStroop1, R.id.btnStroop2};
int first = random.nextInt(2);
btn1 = (Button) findViewById(buttons[first]); //btnstroop1 or btnstroop2
btn2 = (Button) findViewById(buttons[1-first]); //the opposite btn
int randString = new Random().nextInt(stringOnScreen.length);
int randColor = new Random().nextInt(colorsOnScreen.length);
// set the text of the string in textview for user to see
color.setText("" + stringOnScreen[randString]);
color.setTextColor((int) colorsOnScreen[randColor]);
btn1.setText("" + stringOnScreen[randString]); //Set btn1 to the string val
setBtn2Text();
showScore.setText("Score= " + score);
}
public void setUpGame() {
// setting up the hashmap
colors.put("Green", Color.GREEN);
colors.put("Blue", Color.BLUE);
colors.put("Red", Color.RED);
colors.put("Yellow", Color.YELLOW);
colors.put("Black", Color.BLACK);
// setting up vars
color = (TextView) findViewById(R.id.tvStroopColor);
result = (TextView) findViewById(R.id.tvStroopResults);
showScore = (TextView) findViewById(R.id.tvStroopScore);
seeMed = (TextView) findViewById(R.id.tvStroopSeeMeditation);
seeAtt = (TextView) findViewById(R.id.tvStroopSeeAttention);
tenSecs= MediaPlayer.create(Stroop.this, R.raw.tenseconds);
countdown= (EditText) findViewById(R.id.etStroopCountdown);
}
public void setBtn2Text(){
switch(color.getCurrentTextColor()){
case Color.GREEN:
btn2.setText("Green");
break;
case Color.RED:
btn2.setText("Red");
break;
case Color.BLUE:
btn2.setText("Blue");
break;
case Color.YELLOW:
btn2.setText("Yellow");
break;
case Color.BLACK:
btn2.setText("Black");
break;
}
}
public void onClick(View v) {
if(checkForMatchBtn2((Button) v)){
result.setText("Correct!");
result.setTextColor(Color.GREEN);
score++;
}else{
result.setText("Wrong!");
result.setTextColor(Color.RED);
}
setUpQuestion();
}
public boolean checkForMatchBtn2(Button btn2){
if(color.getCurrentTextColor() == Color.GREEN && btn2.getText().equals("Green"))
return true;
else if(color.getCurrentTextColor() == Color.RED && btn2.getText().equals("Red"))
return true;
else if(color.getCurrentTextColor() == Color.BLACK && btn2.getText().equals("Black"))
return true;
else if(color.getCurrentTextColor() == Color.YELLOW && btn2.getText().equals("Yellow"))
return true;
else if(color.getCurrentTextColor() == Color.BLUE && btn2.getText().equals("Blue"))
return true;
else
return false;
}
public boolean checkForMatchBtn1(Button btn1){
if(color.getCurrentTextColor() == Color.GREEN && btn1.getText().equals("Green"))
return true;
else if(color.getCurrentTextColor() == Color.RED && btn1.getText().equals("Red"))
return true;
else if(color.getCurrentTextColor() == Color.BLACK && btn1.getText().equals("Black"))
return true;
else if(color.getCurrentTextColor() == Color.YELLOW && btn1.getText().equals("Yellow"))
return true;
else if(color.getCurrentTextColor() == Color.BLUE && btn1.getText().equals("Blue"))
return true;
else
return false;
}
}
答案 0 :(得分：1)
private Random random = new Random();
然后当你找到按钮时：
btn1 = (Button) findViewById(R.id.btnStroop1);
btn2 = (Button) findViewById(R.id.btnStroop2);
随机找到它们：
int[] buttons = new int[]{R.id.btnStroop1, R.id.btnStroop2};
int first = random.nextInt(2); //0 or 1
btn1 = (Button) findViewById(buttons[first]); //btnStroop1 or btnStroop2
btn2 = (Button) findViewById(buttons[1-first]); //the opposite button
但你也需要这样做：
public void onClick(View v){
if(checkForMatchBtn2((Button) v))
result.setText("Correct!");
else
result.setText("Wrong!");
}
因为现有代码仍将btn1与btnStroop1等链接起来
答案 1 :(得分：1)
不是在布局文件中定义按钮，而是动态地将按钮添加到LinearLayout。
LinearLayout layout = (LinearLayout)view.findViewById(R.id.your_linear_layout); Button btn = new Button(this); btn.setText("Yes"); //TODO Set Button layout params here layout.addView(btn);
同样添加另一个Button并设置onClick侦听器。
生成随机数，并根据该设置以不同顺序设置“是”或“否”按钮。
Random randomGenerator = new Random(); randomNumber = randomGenerator.nextInt(1000); if(randomNumber % 2 == 0){ add Yes button; add No button; }else{ add No buttton; add Yes button; }
希望它有所帮助。