android屏幕参数获取

package com.app.tools.util;

import android.app.Activity;

import android.content.Context;

import android.graphics.Bitmap;

import android.graphics.Rect;

import android.util.DisplayMetrics;

import android.view.View;

import android.view.WindowManager;

/**

* 获得屏幕相关的辅助类

*

* @author zhy

*

*/

public class ScreenUtils {

private ScreenUtils() {

/* cannot be instantiated */

throw new UnsupportedOperationException("cannot be instantiated");

}

/**

* 获得屏幕高度

*

* @param context

* @return

*/

public static int getScreenWidth(Context context) {

DisplayMetrics outMetrics = getMetrics(context);

return outMetrics.widthPixels;

}

/**

* 获得屏幕宽度

*

* @param context

* @return

*/

public static int getScreenHeight(Context context) {

DisplayMetrics outMetrics = getMetrics(context);

return outMetrics.heightPixels;

}

/**

*

* @TODO TODO 获取屏幕的密度（屏幕密度（像素比例：0.75/1.0/1.5/2.0） ）

* @param context

* @Return float

*/

public static float getScreenDensity(Context context) {

DisplayMetrics outMetrics = getMetrics(context);

return outMetrics.density;

}

/**

*

* @TODO TODO 获取屏幕的密度（屏幕密度（每寸像素：120/160/240/320））

* @param context

* @return

* @Return int

*/

public static int getScreenDensityDPI(Context context) {

DisplayMetrics outMetrics = getMetrics(context);

return outMetrics.densityDpi;

}

/**

*

* @TODO TODO 获取屏幕的

* @param context

* @return

* @Return DisplayMetrics

*/

private static DisplayMetrics getMetrics(Context context) {

WindowManager wm = (WindowManager) context

.getSystemService(Context.WINDOW_SERVICE);

DisplayMetrics outMetrics = new DisplayMetrics();

wm.getDefaultDisplay().getMetrics(outMetrics);

return outMetrics;

}

/**

* 获得状态栏的高度

*

* @param context

* @return

*/

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;

}

/**

* 获取当前屏幕截图，包含状态栏

*

* @param activity

* @return

*/

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

*/

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;

}

}