get Screen resolution

public static String getScreenResolutions(Activity ctx) {
    DisplayMetrics metrics = new DisplayMetrics();    ctx.getWindowManager().getDefaultDisplay().getMetrics(metrics);
    String resolution = CV.RESOLUTION_ThemeMDPI;    switch (metrics.densityDpi) {
        case DisplayMetrics.DENSITY_MEDIUM:
            resolution = CV.RESOLUTION_ThemeMDPI;            break;        case DisplayMetrics.DENSITY_HIGH:
            resolution = CV.RESOLUTION_ThemeHDPI;            break;        case DisplayMetrics.DENSITY_XHIGH:
            resolution = CV.RESOLUTION_ThemeXHDPI;            break;        case DisplayMetrics.DENSITY_XXHIGH:
            resolution = CV.RESOLUTION_ThemeXXHDPI;            break;        case DisplayMetrics.DENSITY_XXXHIGH:
            resolution = CV.RESOLUTION_ThemeXXXHDPI;            break;        case DisplayMetrics.DENSITY_560:
            resolution = CV.RESOLUTION_ThemeXXXHDPI;            break;    }
    return resolution;}

Set image size

public static String getScreenResolutions(Activity ctx) {
    DisplayMetrics metrics = new DisplayMetrics();    ctx.getWindowManager().getDefaultDisplay().getMetrics(metrics);
    String resolution = CV.RESOLUTION_ThemeMDPI;    switch (metrics.densityDpi) {
        case DisplayMetrics.DENSITY_MEDIUM:
            resolution = CV.RESOLUTION_ThemeMDPI;            break;        case DisplayMetrics.DENSITY_HIGH:
            resolution = CV.RESOLUTION_ThemeHDPI;            break;        case DisplayMetrics.DENSITY_XHIGH:
            resolution = CV.RESOLUTION_ThemeXHDPI;            break;        case DisplayMetrics.DENSITY_XXHIGH:
            resolution = CV.RESOLUTION_ThemeXXHDPI;            break;        case DisplayMetrics.DENSITY_XXXHIGH:
            resolution = CV.RESOLUTION_ThemeXXXHDPI;            break;        case DisplayMetrics.DENSITY_560:
            resolution = CV.RESOLUTION_ThemeXXXHDPI;            break;    }
    return resolution;}