让我们说我想用左右两列按钮制作相对视图。
每个按钮占据屏幕的20%,相隔10%,两侧保留边框。但要为任何屏幕尺寸执行此操作。 DP我觉得不行,因为你怎么知道每个不同屏幕上的DP像素数?
基本上你如何保持UI在所有设备之间相对相同和适合?
答案 0 :(得分:1)
简短回答:LinearLayout
。
答案很长:
Defining a percentage width for a LinearLayout?
还有一些方法可以在运行时获得密度,但从长远来看,上述内容更容易。
准备好一些伪xml!
<LinearLayout double fill parent, vertical>
<RelativeLayout w = 0, h = 0, weight smallish>
<Button A />
</RelativeLayout>
<LinearLayout w = 0, h = 0, weight largish. horizontal>
<!-- maybe you want these to be RelativeLayout and set the buttons
as centerHorizontalInParent="true" -->
<LinearLayout w = 0, h = 0, weight whatever 20% is>
<Buttons with some padding/margins>
</LinearLayout>
<Some kind of spacer, or just pad the LLs />
<LinearLayout repeat above />
</LL>
</LL>
编辑:
如果你想做很多动态调整大小,我有这个自定义类来获取屏幕大小:
public class ScreenGetter {
private float pixHeight;
private float pixWidth;
private float dpHeight;
private float dpWidth;
private float density;
public ScreenGetter (Context context){
Display display = ((WindowManager)
context.getSystemService(Context.WINDOW_SERVICE))
.getDefaultDisplay();
DisplayMetrics metrics = new DisplayMetrics ();
display.getMetrics(metrics);
pixHeight = metrics.heightPixels;
pixWidth = metrics.widthPixels;
density = context.getResources().getDisplayMetrics().density;
dpHeight = pixHeight / density;
dpWidth = pixWidth / density;
}
public float getPixHeight(){return pixHeight;}
public float getPixWidth(){return pixWidth;}
public float getDpHeight(){return dpHeight;}
public float getDpWidth(){return dpWidth;}
public float getDensity(){return density;}
}
显然,你需要做一些数学计算,找出你想要的不同尺寸和密度。您还需要考虑您未使用的部分屏幕(ActionBar等)