ScreenUtils.java

package com.eighteengray.commonutillibrary;

import android.app.Activity;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Bitmap.Config;
import android.graphics.Canvas;
import android.graphics.Rect;
import android.util.DisplayMetrics;
import android.view.View;
import android.view.WindowManager;
import android.widget.ListView;
import android.widget.ScrollView;


/**
 * 屏幕相关工具类
 */
public class ScreenUtils
{
    /**
     * 获得屏幕宽度
     * @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);  
        return outMetrics.widthPixels;  
    }  
  
    
    /**
     * 获得屏幕高度
     * @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);  
        return outMetrics.heightPixels;  
    }  
  

    /** 
     * 获取状态栏高度
     * @param context
     * @return 
     */  
    public static int getStatusBarHeight(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;  
    }  
  

    
    //屏幕截图
    /**
     * 当前屏幕截图，包含状态栏
     * @param activity
     * @return 
     */  
    public static Bitmap screenShotWithStatusBar(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 = Bitmap.createBitmap(bmp, 0, 0, width, height);
        view.destroyDrawingCache();  
        return bp;  
  
    }  

    
    /** 
     * 当前屏幕截图，不包含状状态栏
     * @param activity
     * @return 
     */  
    public static Bitmap screenShotWithoutStatusBar(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;  
    }


	/**
	 * 普通View截屏
	 * @param v
	 * @param fileName
	 * @return
     */
	public static Bitmap screenShotNormalView(View v, String fileName)
	{
		v.clearFocus();
		v.setPressed(false);
		boolean willNotCache = v.willNotCacheDrawing();
		v.setWillNotCacheDrawing(false);
		int color = v.getDrawingCacheBackgroundColor();
		v.setDrawingCacheBackgroundColor(0);
		if (color != 0)
		{
			v.destroyDrawingCache();
		}
		v.buildDrawingCache();
		Bitmap cacheBitmap = v.getDrawingCache();
		Bitmap bitmap = Bitmap.createBitmap(cacheBitmap);
		// Restore the view
		v.destroyDrawingCache();
		v.setWillNotCacheDrawing(willNotCache);
		v.setDrawingCacheBackgroundColor(color);
		return bitmap;
	}


	/**
	 * ScrollView截屏
	 * @param scrollView
	 * @param activity
	 * @param fileName
     * @return
     */
	public static Bitmap screenShotScrollView(ScrollView scrollView, Activity activity, String fileName)
	{
		int h = 0;
		Bitmap bitmap = null;
		// 获取scrollView实际高度
		for (int i = 0; i < scrollView.getChildCount(); i++)
		{
			h += scrollView.getChildAt(i).getHeight();
		}
		// 创建对应大小的bitmap
		bitmap = Bitmap.createBitmap(scrollView.getWidth(), h, Config.ARGB_8888);
		final Canvas canvas = new Canvas(bitmap);
		scrollView.draw(canvas);
		return bitmap;
	}


	/**
	 * ListView截屏
	 * @param listView
	 * @param activity
	 * @param fileName
     * @return
     */
	public static Bitmap screenShotListView(ListView listView, Activity activity, String fileName)
	{
		int h = 0;
		Bitmap bitmap = null;
		// 获取listView实际高度
		for (int i = 0; i < listView.getChildCount(); i++)
		{
			h += listView.getChildAt(i).getHeight();
		}
		// 创建对应大小的bitmap
		bitmap = Bitmap.createBitmap(listView.getWidth(), h, Config.ARGB_8888);
		final Canvas canvas = new Canvas(bitmap);
		listView.draw(canvas);
		return bitmap;
	}


}