ViewUtils.java

package yifeiyuan.practice.yutils;

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

/**
 * Created by alanchen on 15/9/8.
 */
public class ViewUtils {

    public static float getElevation(Context context, float degree) {
        return context.getResources().getDisplayMetrics().density * degree;
    }

    public static float getElevation(Context context, int degree) {
        return context.getResources().getDisplayMetrics().density * degree;
    }

    /**
     * 获得屏幕高度
     * @param context
     */
    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
     */
    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;
    }



    /**
     * 获取屏幕密度
     * @param context
     */
    public static float getScreenDensity(Context context) {
        return context.getResources().getDisplayMetrics().density;
    }

    /**
     * 获取状态栏高度
     * @param context
     * @return
     */
    public static int getStatusBarHeight(Context context) {
        int result = 0;

        int resourceId = context.getResources().getIdentifier("status_bar_height", "dimen", "android");

        if (resourceId > 0) {
            result = context.getResources().getDimensionPixelSize(resourceId);
        }

        return result;
    }

    public static int getToolbarHeight(Context context) {
        TypedValue typedValue = new TypedValue();

        if (context.getTheme().resolveAttribute(android.R.attr.actionBarSize, typedValue, true)) {
            return TypedValue.complexToDimensionPixelSize(typedValue.data, context.getResources().getDisplayMetrics());
        }

        return 0;
    }



    /**
     * 获取当前屏幕截图，包含状态栏
     * @param activity
     */
    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
     * by Hankkin at:2015-10-07 21:16:43
     */
    public static Bitmap snapShotWithoutStatusBar(Activity activity) {
        View view = activity.getWindow().getDecorView();
        view.setDrawingCacheEnabled(true);
        view.buildDrawingCache();
        Bitmap bmp = view.getDrawingCache();
        Rect frame = new Rect();
        view.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;

    }

}