android - setAccuracy与setHorizo​​ntalAccuracy

setAccuracy


  指示所需的纬度和经度精度。如果期望的位置合适，则精度可以为ACCURACY_FINE，否则为ACCURACY_COARSE。更加精确的位置可能会消耗更多功率，并且可能需要更长的时间。


setHorizontalAccuracy


  指示所需的水平精度（纬度和经度）。精度可以是ACCURACY_LOW，ACCURACY_MEDIUM，ACCURACY_HIGH或NO_REQUIREMENT。更加精确的位置可能会消耗更多功率，并且可能需要更长的时间。


原始android文档的另一个示例。那么区别是什么呢 ？注意它们采用不同的常量-是否可以/希望通过常量的组合来指定两者？

最佳答案

source很清楚。

/**
 * Indicates the desired horizontal accuracy (latitude and longitude).
 * Accuracy may be {@link #ACCURACY_LOW}, {@link #ACCURACY_MEDIUM},
 * {@link #ACCURACY_HIGH} or {@link #NO_REQUIREMENT}.
 * More accurate location may consume more power and may take longer.
 *
 * @throws IllegalArgumentException if accuracy is not one of the supported constants
 */
public void setHorizontalAccuracy(int accuracy) {
    if (accuracy < NO_REQUIREMENT || accuracy > ACCURACY_HIGH) {
        throw new IllegalArgumentException("accuracy=" + accuracy);
    }
    mHorizontalAccuracy = accuracy;
}

/**
 * Returns a constant indicating the desired horizontal accuracy (latitude and longitude).
 * Accuracy may be {@link #ACCURACY_LOW}, {@link #ACCURACY_MEDIUM},
 * {@link #ACCURACY_HIGH} or {@link #NO_REQUIREMENT}.
 */
public int getHorizontalAccuracy() {
    return mHorizontalAccuracy;
}

/**
 * Indicates the desired accuracy for latitude and longitude. Accuracy
 * may be {@link #ACCURACY_FINE} if desired location
 * is fine, else it can be {@link #ACCURACY_COARSE}.
 * More accurate location may consume more power and may take longer.
 *
 * @throws IllegalArgumentException if accuracy is not one of the supported constants
 */
public void setAccuracy(int accuracy) {
    if (accuracy < NO_REQUIREMENT || accuracy > ACCURACY_COARSE) {
        throw new IllegalArgumentException("accuracy=" + accuracy);
    }
    if (accuracy == ACCURACY_FINE) {
        mHorizontalAccuracy = ACCURACY_HIGH;
    } else {
        mHorizontalAccuracy = ACCURACY_LOW;
    }
}

/**
 * Returns a constant indicating desired accuracy of location
 * Accuracy may be {@link #ACCURACY_FINE} if desired location
 * is fine, else it can be {@link #ACCURACY_COARSE}.
 */
public int getAccuracy() {
    if (mHorizontalAccuracy >= ACCURACY_HIGH) {
        return ACCURACY_FINE;
    } else {
        return ACCURACY_COARSE;
    }
}

  那么区别是什么呢 ？注意它们采用不同的常量-是否可以/希望通过常量的组合来指定两者？


没什么区别-setAccuracy()只需将mHorizontalAccuracy设置为ACCURACY_HIGH或ACCURACY_LOW-如果要ACCURACY_MEDIUM或NO_REQUIREMENT，则必须调用setHorizontalAccuracy()。

因此，内部准确性只是“水平准确性”。现在，如果有人知道他们为什么同时需要两者，我将接受他/她的回答-现在结束。