对于相同的密度，英寸和分辨率的设备位图大小差异 [英] Bitmap size difference for devices with same density, inches and resolution

问题描述

我有两个平板设备：

1）华硕便笺172V平板电脑

600 * 1024像素，7.0英寸（170〜PPI像素密度）链接：

在线给出的规格

通过code规格：1024 * 552像素，7.0英寸（160 ppi的像素密度）

2） MID平板电脑7510

鉴于网上的

规格：800×480像素，7.0英寸（没有提及任何地方密度）的链接

通过code规格：1024 * 552像素，7.0英寸（160 ppi的像素密度）

我的问题是：

- 无论是平板电脑具有相同的密度和决议（由code），所以我怎么能才能设置位图高度区分它们（宽度来都正确）在 MID7510 的情况下，位图高度扩展轻微下降。

- 是否有负责造成不同的位图尺寸为结果的其他因素
  片？

- 为什么规格过来了code不同，给予不同的在线

code得到的密度和精度：

  DisplayMetrics DM =新DisplayMetrics（）;
 。getActivity（）getWindowManager（）getDefaultDisplay（）getMetrics（DM）。;    INT屏幕宽度= dm.widthPixels;
    INT screenHeight = dm.heightPixels;    以像素为单位//显示装置DPI（密度）值
    INT screenDPIy =（INT）dm.ydpi;
 

解决方案

该图是在绘制，华电国际文件夹中。

我是做简单：

  img.setLayoutParams（新LinearLayout.LayoutParams（LinearLayout.LayoutParams.MATCH_PARENT，LinearLayout.LayoutParams.MATCH_PARENT））;
 

的高度是不正确的 MID 7510 这样做。

设置这样的高度工作既片：

 静态INT imgHeight = 0;可绘制D =（BitmapDrawable）getResources（）getDrawable（R.drawable.chart）。imgHeight = d.getIntrinsicHeight（）;最后ImageView的IMG =新ImageView的（getActivity（））;img.setLayoutParams（新LinearLayout.LayoutParams（LinearLayout.LayoutParams.MATCH_PARENT，（int）的（imgHeight * 1.5）））;
 

这是因为 1华电国际= 1.5 MDPI 。所以总高度应该是图像高度的1.5倍。

I have two tablet devices:

1) Asus Memo Pad 172V tablet

Specs given online as: 600 * 1024 pixels, 7.0 inches (~170 ppi pixel density) LINK

Specs through code: 1024 * 552 pixels, 7.0 inches (160 ppi pixel density)

2) MID 7510 tablet

Specs given online as: 800 * 480 pixels, 7.0 inches (no density mentioned anywhere) LINK

Specs through code: 1024 * 552 pixels, 7.0 inches (160 ppi pixel density)

My problem is:

- Both the tablets have the same density and resolutions (by code), so how can I distinguish between them in order to set the bitmap height (width is coming correct for both) as in case of MID7510, the bitmap height is extended slight down.

- Is there any other factors that are responsible for causing different bitmap sizes for both
tablets ?

- Why are specs coming different by code and are given different online ?

Code to get density and resolution:

 DisplayMetrics dm = new DisplayMetrics();
 getActivity().getWindowManager().getDefaultDisplay().getMetrics(dm);                       

    int screenWidth = dm.widthPixels;
    int screenHeight = dm.heightPixels;                     

    // Display device dpi (density) value in pixels
    int screenDPIy = (int)dm.ydpi;

解决方案

The chart was on drawable-hdpi folder.

I was doing simply this:

img.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.MATCH_PARENT));

The height was not proper in MID 7510 doing so.

Setting height like this worked for both the tablets:

static int imgHeight = 0;

Drawable d = (BitmapDrawable) getResources().getDrawable(R.drawable.chart);

imgHeight = d.getIntrinsicHeight(); 

final ImageView img = new ImageView(getActivity());

img.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, (int) (imgHeight * 1.5)));

This is because 1 hdpi= 1.5 mdpi. So total height should be 1.5 times of image height.

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