hdpi/ldpi/mdpi图形尺寸

Question

我有一个尺寸为300*90的按钮图形。hdpi/mdpi/ldpi的尺寸必须是多少?谢谢

Answer 1

谷歌suggests使用

3 : 4 : 6 : 8 : 12 : 16缩放比率

相应的ldpi : mdpi : hdpi : xhdpi : xxhdpi : xxxhdpi。示例：

适用于适用于high-density

• 96x96的low-density

• 48x48的

• 36x36，适用于适用于extra-extra-extra-high-density

的extra-extra-high-density

• 192x192的额外high-density

• 144x144

在您的示例中，如果提到的按钮大小用于hdpi，则正确的尺寸应为：

• 150x45 ldpi
• 200x60 mdpi
• 300x90 hdpi
• 400x120 xxxhdpi

<代码>F230

Answer 2

这取决于您设计该图形所依据的设备屏幕的大小。如果您希望它在320x480 (HVGA)画布上显示为300x90，则您的像素尺寸对于MDPI设备是正确的，并且您需要以下图像：

• LDPI: 225x68px
• MDPI: 300x90px
• HDPI: 450x135px

LDPI是MDPI缩放的75%，HDPI是MDPI缩放的150%。例如，如果您在480x800 (WVGA)画布上设计了这些图形尺寸，那么您的尺寸对于HDPI来说已经是正确的，并且您需要从那里缩小其他两个尺寸：

150x45px

• MDPI: 200x60px

• HDPI：
• LDPI: 300x90px

希望这能有所帮助！

Answer 3

用于创建所有资源文件夹映像的

完整公式

首先，您必须决定为哪个DPI创建图像，一旦您决定并创建了图像，然后根据Google Guide Lines使用以下代码

public class DPICalculator {

    private final float LDPI = 120;
    private final float MDPI = 160;
    private final float HDPI = 240;
    private final float XHDPI = 320;

    private final float BASE_DPI = MDPI;

    public static void main(String[] args) {
        DPICalculator cal = new DPICalculator();

        cal.calculateDPI_baseUnitPixel(300, 90, cal.HDPI);
    }

    private float densityWidth;
    private float densityHeight;

    public void calculateDPI_baseUnitPixel(float width, float height, float currentDensity) {

        densityWidth = getDensityPX(width, currentDensity);
        densityHeight = getDensityPX(height, currentDensity);

        this.calculateAllDP();
    }

    private float getDensityPX(float value, float currentDensity) {
        return (value / (currentDensity / BASE_DPI));
    }

    public void calculateDPI_baseUnitDPI(float width, float height, float currentDensity) {

        densityWidth = getDensityDPI(width, currentDensity);
        densityHeight = getDensityDPI(height, currentDensity);

        this.calculateAllDP();
    }

    private float getDensityDPI(float value, float currentDensity) {
        return (value * (currentDensity / BASE_DPI));
    }

    private void calculateAllDP() {
        // get all settings.
        float low_pw = densityWidth * (LDPI / BASE_DPI);
        float low_ph = densityHeight * (LDPI / BASE_DPI);

        float med_pw = densityWidth * (MDPI / BASE_DPI);
        float med_ph = densityHeight * (MDPI / BASE_DPI);

        float high_pw = densityWidth * (HDPI / BASE_DPI);
        float high_ph = densityHeight * (HDPI / BASE_DPI);

        float xhigh_pw = densityWidth * (XHDPI / BASE_DPI);
        float xhigh_ph = densityHeight * (XHDPI / BASE_DPI);

        System.out.println("LDPI " + low_pw + " x " + low_ph);
        System.out.println("MDPI " + med_pw + " x " + med_ph);
        System.out.println("HDPI " + high_pw + " x " + high_ph);
        System.out.println("XHDPI " + xhigh_pw + " x " + xhigh_ph);

    }
}

结果

LDPI 150.0 x 45.0
MDPI 200.0 x 60.0
HDPI 300.0 x 90.0
XHDPI 400.0 x 120.0