SaScreenUtils.java

package com.martin.simpledevelop.utils.screen;

import android.app.Activity;
import android.content.Context;
import android.content.res.Resources;
import android.graphics.Bitmap;
import android.graphics.Rect;
import android.util.DisplayMetrics;
import android.view.View;
import android.view.WindowManager;

import com.martin.simpledevelop.utils.log.SaLogUtils;

/**
 * @Description  屏幕 工具类<br>
 * @File SaScreenUtils.java
 * @Package com.martin.simpledevelop.utils.screen
 * @Date 2015年6月26日上午1:23:20
 * @Author Donghongyu 1358506549@qq.com
 * @Version v1.0.0
 */
public class SaScreenUtils {
	/**
	 * Log 输出标签
	 */
	public static String TAG = SaScreenUtils.class.getName();

	/**
	 * 获得屏幕高度
	 * 
	 * @param context
	 * @return
	 */
	public static int getScreenWidth(Context context) {
		WindowManager wm = (WindowManager) context
				.getSystemService(Context.WINDOW_SERVICE);
		DisplayMetrics outMetrics = new DisplayMetrics();
		wm.getDefaultDisplay().getMetrics(outMetrics);
		int width = outMetrics.widthPixels;
		SaLogUtils.i(TAG, "当前屏幕宽度：" + width);
		return width;
	}

	/**
	 * 获得屏幕宽度
	 * 
	 * @param context
	 * @return
	 */
	public static int getScreenHeight(Context context) {
		WindowManager wm = (WindowManager) context
				.getSystemService(Context.WINDOW_SERVICE);
		DisplayMetrics outMetrics = new DisplayMetrics();
		wm.getDefaultDisplay().getMetrics(outMetrics);
		int height = outMetrics.heightPixels;
		SaLogUtils.i(TAG, "当前屏幕高度：" + height);
		return height;
	}

	/**
	 * 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();
		}
		SaLogUtils.i(TAG, "当前状态栏高度：" + statusHeight);
		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;
	}

	/**
	 * 获取屏幕尺寸与密度.
	 *
	 * @param context
	 *            the context
	 * @return mDisplayMetrics
	 */
	public static DisplayMetrics getDisplayMetrics(Context context) {
		Resources mResources;
		if (context == null) {
			mResources = Resources.getSystem();

		} else {
			mResources = context.getResources();
		}
		// DisplayMetrics{density=1.5, width=480, height=854, scaledDensity=1.5,
		// xdpi=160.421, ydpi=159.497}
		// DisplayMetrics{density=2.0, width=720, height=1280,
		// scaledDensity=2.0, xdpi=160.42105, ydpi=160.15764}
		DisplayMetrics mDisplayMetrics = mResources.getDisplayMetrics();
		SaLogUtils.i(TAG, "获取屏幕尺寸与密度.：" + mDisplayMetrics);
		return mDisplayMetrics;
	}

}