Android SharedPreferences 所有变量分配给相同的值

Question

我正在创建一个包含多项活动的应用程序。 SharedPreferences 在多个活动中读取。

我发现当我更新 SharedPreferences 文件之一中的单个变量时，该文件中的所有变量都会采用分配的值。

发生这种情况有一般原因吗？如果没有的话我可以发布代码。

以下代码用于写入和读取值（全部大写的任何内容都是唯一的整数常量）

public void LevelUp(int gameType) {
    step++;
    SharedPreferences settings = getSharedPreferences("Steps", 0);
    SharedPreferences.Editor editor = settings.edit();
    switch (gameType) {
        case NUMBERS_SPEED:   editor.putInt("NUMBERS_SPEED",   step);
        case NUMBERS_BINARY:  editor.putInt("NUMBERS_BINARY",  step);
        case NUMBERS_SPOKEN:  editor.putInt("NUMBERS_SPOKEN",  step);
        case LISTS_WORDS:     editor.putInt("LISTS_WORDS",     step);
        case LISTS_EVENTS:    editor.putInt("LISTS_EVENTS",    step);
        case SHAPES_FACES:    editor.putInt("SHAPES_FACES",    step);
        case SHAPES_ABSTRACT: editor.putInt("SHAPES_ABSTRACT", step);
        case CARDS_SPEED:     editor.putInt("CARDS_SPEED",     step);
    }
    editor.commit();        
}

public int getStep(int gameType) {
    SharedPreferences settings = getSharedPreferences("Steps", 0);
    switch (gameType) {
        case NUMBERS_SPEED:   return settings.getInt("NUMBERS_SPEED", 1);
        case NUMBERS_BINARY:  return settings.getInt("NUMBERS_BINARY", 1);
        case NUMBERS_SPOKEN:  return settings.getInt("NUMBERS_SPOKEN", 1);
        case LISTS_WORDS:     return settings.getInt("LISTS_WORDS", 1);
        case LISTS_EVENTS:    return settings.getInt("LISTS_EVENTS", 1);
        case SHAPES_FACES:    return settings.getInt("SHAPES_FACES", 1);
        case SHAPES_ABSTRACT: return settings.getInt("SHAPES_ABSTRACT", 1);
        case CARDS_SPEED:     return settings.getInt("CARDS_SPEED", 1);
        default: return -1;
    }
}

以下代码驻留在不同的活动中：

SharedPreferences settings = getSharedPreferences("Steps", 0);
step = settings.getInt("NUMBERS_SPOKEN", 1);

Answer 1

您需要在 case 语句之间进行中断

switch (gameType) {
    case NUMBERS_SPEED:   editor.putInt("NUMBERS_SPEED",   step);
    break;
    case NUMBERS_BINARY:  editor.putInt("NUMBERS_BINARY",  step);
    break;

，否则它将遍历每个 case 语句，这就是为什么它们都被分配了该值