Android獲取常用輔助方法(獲取屏幕高度、寬度、密度、通知欄高度、截圖)

我們需要獲取Android手機或Pad的屏幕的物理尺寸，以便於界面的設計或是其他功能的實現。下面就分享一下Android中常用的一些輔助方法：

獲取屏幕高度：

/**
* 獲得屏幕高度
* @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;
}

獲取屏幕寬度：

/**
* 獲得屏幕寬度
* @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;
}

獲取屏幕密度：

/**
* 獲取屏幕密度
* @param context
* @return
* by Hankkin at:2015-10-07 21:16:29
*/
public static float getScreenDensity(Context context) {
return context.getResources().getDisplayMetrics().density;
}

dip轉px：

/**
* dip轉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);
}

獲取狀態欄高度：

/**
* 獲得狀態欄的高度
* @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;
}

獲取屏幕當前截圖：

/**
* 獲取當前屏幕截圖，包含狀態欄
* @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;
}
/**
* 獲取當前屏幕截圖，不包含狀態欄
* @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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