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2016.10.21 11:16

[android] dp, px 서로 변환

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# Context가 있는 Activity 내부용 함수

//dp를 px로 변환 (dp를 입력받아 px을 리턴)
public float convertDpToPixel(float dp){
    Resources resources = this.getResources();
    DisplayMetrics metrics = resources.getDisplayMetrics();
    float px = dp * ((float)metrics.densityDpi / DisplayMetrics.DENSITY_DEFAULT);
    return px;
}

//px을 dp로 변환 (px을 입력받아 dp를 리턴)
public float convertPixelsToDp(float px){
    Resources resources = this.getResources();
    DisplayMetrics metrics = resources.getDisplayMetrics();
    float dp = px / ((float)metrics.densityDpi / DisplayMetrics.DENSITY_DEFAULT);
    return dp;
}


# Context를 변수로 받아서 쓰는 유틸 라이브러리용 Static 함수

//dp를 px로 변환 (dp를 입력받아 px을 리턴)
public static float convertDpToPixel(float dp, Context context){
    Resources resources = context.getResources();
    DisplayMetrics metrics = resources.getDisplayMetrics();
    float px = dp * ((float)metrics.densityDpi / DisplayMetrics.DENSITY_DEFAULT);
    return px;
}

//px을 dp로 변환 (px을 입력받아 dp를 리턴)
public static float convertPixelsToDp(float px, Context context){
    Resources resources = context.getResources();
    DisplayMetrics metrics = resources.getDisplayMetrics();
    float dp = px / ((float)metrics.densityDpi / DisplayMetrics.DENSITY_DEFAULT);
    return dp;
}



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