获得屏幕相关的Android辅助类

2015/02/10 38581

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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 
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) 
    { 
        WindowManager wm = (WindowManager) context 
                .getSystemService(Context.WINDOW_SERVICE); 
        DisplayMetrics outMetrics = new DisplayMetrics(); 
        wm.getDefaultDisplay().getMetrics(outMetrics); 
        return outMetrics.widthPixels; 
    } 
   
    /**
     * 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); 
        return outMetrics.heightPixels; 
    } 
   
    /**
     * 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; 
   
    } 
   
}