Android获取常用辅助方法(获取屏幕高度、宽度、密度、通知栏高度、截图)

我们需要获取android手机或pad的屏幕的物理尺寸，以便于界面的设计或是其他功能的实现。下面就分享一下android中常用的一些辅助方法：

获取屏幕高度：

/**
* 获得屏幕高度
* @param context
* @return
* by hankkin at:2015-10-07 21:15:59
*/
public static int getscreenwidth(context context) {
windowmanager wm = (windowmanager) context
.getsystemservice(context.window_service);
displaymetrics outmetrics = new displaymetrics();
wm.getdefaultdisplay().getmetrics(outmetrics);
return outmetrics.widthpixels;
}

获取屏幕宽度：

/**
* 获得屏幕宽度
* @param context
* @return
* by hankkin at:2015-10-07 21:16:13
*/
public static int getscreenheight(context context) {
windowmanager wm = (windowmanager) context
.getsystemservice(context.window_service);
displaymetrics outmetrics = new displaymetrics();
wm.getdefaultdisplay().getmetrics(outmetrics);
return outmetrics.heightpixels;
}

获取屏幕密度：

/**
* 获取屏幕密度
* @param context
* @return
* by hankkin at:2015-10-07 21:16:29
*/
public static float getscreendensity(context context) {
return context.getresources().getdisplaymetrics().density;
}

dip转px：

/**
* dip转px像素
* @param context
* @param px
* @return
* by hankkin at:2015-10-07 21:16:43
*/
public static int dip2px(context context, float px) {
final float scale = getscreendensity(context);
return (int) (px * scale + 0.5);
}

获取状态栏高度：

/**
* 获得状态栏的高度
* @param context
* @return
* by hankkin at:2015-10-07 21:16:43
*/
public static int getstatusheight(context context) {
int statusheight = -1;
try {
class<?> clazz = class.forname("com.android.internal.r$dimen");
object object = clazz.newinstance();
int height = integer.parseint(clazz.getfield("status_bar_height")
.get(object).tostring());
statusheight = context.getresources().getdimensionpixelsize(height);
} catch (exception e) {
e.printstacktrace();
}
return statusheight;
}

获取屏幕当前截图：

/**
* 获取当前屏幕截图，包含状态栏
* @param activity
* @return
* by hankkin at:2015-10-07 21:16:43
*/
public static bitmap snapshotwithstatusbar(activity activity) {
view view = activity.getwindow().getdecorview();
view.setdrawingcacheenabled(true);
view.builddrawingcache();
bitmap bmp = view.getdrawingcache();
int width = getscreenwidth(activity);
int height = getscreenheight(activity);
bitmap bp = null;
bp = bitmap.createbitmap(bmp, 0, 0, width, height);
view.destroydrawingcache();
return bp;
}
/**
* 获取当前屏幕截图，不包含状态栏
* @param activity
* @return
* by hankkin at:2015-10-07 21:16:43
*/
public static bitmap snapshotwithoutstatusbar(activity activity) {
view view = activity.getwindow().getdecorview();
view.setdrawingcacheenabled(true);
view.builddrawingcache();
bitmap bmp = view.getdrawingcache();
rect frame = new rect();
activity.getwindow().getdecorview().getwindowvisibledisplayframe(frame);
int statusbarheight = frame.top;
int width = getscreenwidth(activity);
int height = getscreenheight(activity);
bitmap bp = null;
bp = bitmap.createbitmap(bmp, 0, statusbarheight, width, height
- statusbarheight);
view.destroydrawingcache();
return bp;
}

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