使用SharedPreferences保存用户得分
问题描述:
我有2个活动。在第一个我选择一个级别。在第二个我玩游戏。在第二个活动中,我回答问题,每次我正确回答时,我向我的数组列表中添加一个值。当游戏结束时,用户返回级别选择活动,并在那里他可以看到他的分数。例如:Level1:您正确回答了17个问题。我怎样才能做到这一点?我尝试使用sharedpreferences但没有运气。它总是显示0.我猜测它是因为它在游戏开始时获得了值,当列表为空时。游戏结束后,如何在列表填充后显示值?使用SharedPreferences保存用户得分
这是女巫的游戏活动创建一个列表,在其中存储值,并回答问题:
public class MainActivity extends Activity {
Button mYes;
Button mNo;
TextView mQuestion;
Button btnClosePopup;
TextView mPopupText;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final int[] count = {0}; // Global array.
final int[] score = {0};
//final int[] intArray = new int[3];
mYes = (Button) findViewById(R.id.button2);
mPopupText = (TextView)findViewById(R.id.popupTekstas);
btnClosePopup = (Button)findViewById(R.id.btn_close_popup);
mNo = (Button) findViewById(R.id.button);
mQuestion = (TextView) findViewById(R.id.textView);
//Creating questions. (Question, boolean, answer).
final Question first = new Question("Do i understand this code?", true, "Only Jesus knows");
final Question second = new Question("Why dont i understand this code?", false, "Im not Jesus");
final Question third = new Question("Why I am not Jesus?", true, "2fat.");
//Creating Lists for questions and boolean values.
final ArrayList<Question> questions = new ArrayList<Question>();
final ArrayList<Boolean> type = new ArrayList<Boolean>();
final ArrayList<Integer> points = new ArrayList<Integer>();
SharedPreferences sharedPref = getSharedPreferences("level1", Context.MODE_PRIVATE);
SharedPreferences.Editor editor = sharedPref.edit();
editor.putInt("taskai", points.size());
editor.commit();
//mResult.setText("zdr");
//Adding questions to the question list
questions.add(first);
questions.add(second);
questions.add(third);
// Adding boleans to the boolean list
type.add(first.correctAnswer);
type.add(second.correctAnswer);
type.add(third.correctAnswer);
//Show the first question on Activity start.
mQuestion.setText(questions.get(0).question);
// Open PopUp Window on true button click.
mYes.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
initiatePopupWindow();
if(type.get(count[0])){
((TextView)pwindo.getContentView().findViewById(R.id.popupTekstasTiesaArNe)).setText("Correct!");
} else {
((TextView)pwindo.getContentView().findViewById(R.id.popupTekstasTiesaArNe)).setText("False!");
}
//Show the first answer on first button click.
((TextView)pwindo.getContentView().findViewById(R.id.popupTekstas)).setText(questions.get((count[0]) % questions.size()).answer);
// When PopUp button closes open the next question with the if/else conditions.
btnClosePopup.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//if the question is true show next question/ else close app
if (type.get(count[0])) {
points.add(1); // if the answer is correct add +1 to the list.
score[0]++;
if(questions.size()-1 == count[0]) // if you count[0] is init to 0
{
AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
builder.setTitle("WInner");
builder.setMessage("You won, play again?");
builder.setCancelable(false);
builder.setPositiveButton(android.R.string.yes,
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
// just close dialog
dialog.cancel();
}
});
builder.setNegativeButton(android.R.string.no,
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
finish();
// mResult.setText("" + points.size());
}
});
// Create dialog from builder
AlertDialog alert = builder.create();
// Show dialog
alert.show();
count[0]=0;
}
else if(questions.size()-1 < count[0])
try {
throw new Exception("Invalid ");
} catch (Exception e) {
e.printStackTrace();
}
else
count[0]++;
mQuestion.setText(questions.get(count[0]).question); // you dont need calculate the module anymore
pwindo.dismiss();
} else {
count[0]++;
mQuestion.setText(questions.get(count[0]).question); // you dont need calculate the module anymore
pwindo.dismiss();
}
}
});
}
});
mNo.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
initiatePopupWindow();
if(!type.get(count[0])){
((TextView)pwindo.getContentView().findViewById(R.id.popupTekstasTiesaArNe)).setText("Correct!");
} else {
((TextView)pwindo.getContentView().findViewById(R.id.popupTekstasTiesaArNe)).setText("False!");
}
((TextView)pwindo.getContentView().findViewById(R.id.popupTekstas)).setText(questions.get((count[0]) % questions.size()).answer);
btnClosePopup.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (!type.get(count[0])) {
points.add(1); // if the answer is correct add +1 to the list.
score[0]++;
if(questions.size()-1 == count[0]) // if you count[0] is init to 0
{
AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
builder.setTitle("WInner")
.setMessage("You won, play again?")
.setCancelable(false)
.setPositiveButton(android.R.string.yes,
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
// just close dialog
dialog.cancel();
}
})
.setNegativeButton(android.R.string.no,
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
finish();
//mResult.setText("" + points.size());
}
});
// Create dialog from builder
AlertDialog alert = builder.create();
// Show dialog
alert.show();
count[0]=0;
((TextView)pwindo.getContentView().findViewById(R.id.popupTekstasTiesaArNe)).setText("Klaida!");
}
else if(questions.size()-1 < count[0])
try {
throw new Exception("Invalid ");
} catch (Exception e) {
e.printStackTrace();
}
else
count[0]++;
mQuestion.setText(questions.get(count[0]).question); // you dont need calculate the module anymore
pwindo.dismiss();
} else {
count[0]++;
mQuestion.setText(questions.get(count[0]).question); // you dont need calculate the module anymore
pwindo.dismiss();
}
}
});
}
});
}
public PopupWindow pwindo;
public void initiatePopupWindow() {
try {
// We need to get the instance of the LayoutInflater
LayoutInflater inflater = (LayoutInflater) MainActivity.this
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View layout = inflater.inflate(R.layout.popup,
(ViewGroup) findViewById(R.id.popup_element));
pwindo = new PopupWindow(layout, 500, 570, true);
pwindo.showAtLocation(layout, Gravity.CENTER, 0, 0);
btnClosePopup = (Button) layout.findViewById(R.id.btn_close_popup);
btnClosePopup.setOnClickListener(cancel_button_click_listener);
} catch (Exception e) {
e.printStackTrace();
}
}
public View.OnClickListener cancel_button_click_listener = new View.OnClickListener() {
@Override
public void onClick(View v) {
pwindo.dismiss();
}
};
在该活动中我尝试获取列表值,并将其:
public class LevelSelectActivity extends MainActivity {
Button mLevel1;
public TextView mResult;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_level_select);
SharedPreferences sharedPref = getSharedPreferences("level1", Context.MODE_PRIVATE);
int result = sharedPref.getInt("taskai", 0);
mLevel1 = (Button)findViewById(R.id.level1);
mResult = (TextView)findViewById(R.id.Resultas);
// mResult.setText(players.size()-1 + "/" + 3);
mResult.setText("" + result);
mLevel1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent startGame = new Intent(LevelSelectActivity.this, MainActivity.class);
startActivity(startGame);
}
});
}
答
我不确定您的代码中发生了什么,但我确实知道首选项不是传递数据的最佳方式。
您最好使用set results/ get results pattern。
的第一项活动使用
startActivityForResult(intent, LEVEL_REQUEST);
它还会创建一个函数来读回数据它完成之后。这会是这个样子:
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
// Check which request we're responding to
if (requestCode == LEVEL_REQUEST) {
// Make sure the request was successful
if (resultCode == RESULT_OK) {
}
}
}
活动将结果发送将做到这一点,以公布结果:
Intent resultsIntent=new Intent();
//Set data in the intent, note this intent is returned to the original function in `onActivityResult`
setResult(Activity.RESULT_OK,resultsIntent);
第二活动采用
你可以通过像LevelSelectActivity意图参数像startGame.putExtras(“key”,value);两者都是字符串,只有当你想获得MainActivity然后调用getIntent()。getStringExtra(“key”)时,它才会执行。 – Hanuman 2015-02-07 12:34:37
游戏结束时保存分数。也真的不需要使用ArrayList。只要使用一个int值并且每当玩家获得一个点时就增加它。 – Longi 2015-02-07 12:35:06
但是这个分数会保存吗? – Arina 2015-02-07 12:35:30