package com.manny.utils;

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

/**
* Created by manny on 2017/12/28.
*/

public class ScreenUtils
{
private ScreenUtils()
{
/* cannot be instantiated */
throw new UnsupportedOperationException( “cannot be instantiated” );
}

/**
 * 獲得螢幕密度density
 */
public static float getDensity( Context context )
{
    return context.getResources().getDisplayMetrics().density;
}

/**
 * 獲得螢幕寬度
 */
public static int getScreenWidth( Context context )
{
    return context.getResources().getDisplayMetrics().widthPixels;
}

/**
 * 獲得螢幕高度
 */
public static int getScreenHeight( Context context )
{
    return context.getResources().getDisplayMetrics().heightPixels;
}

/**
 * 獲得狀態列的高度
 */
public static int getStatusHeight( Context context )
{
    if( context != null )
    {
        int statusBarHeight = 0;
        Resources res = context.getResources();
        int resourceId = res.getIdentifier( "status_bar_height", "dimen", "android" );
        if( resourceId > 0 )
        {
            statusBarHeight = res.getDimensionPixelSize( resourceId );
        }
        return statusBarHeight;
    }
    return -1;
}

/**
 * 獲取當前螢幕截圖，包含狀態列
 */
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;
}

/**
 * 獲取當前螢幕截圖，不包含狀態列
 */
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;

}
 

}