Android 按壓縮放效果&FastBlur毛玻璃效果

時間 2019-11-24

標籤 android 按壓縮放效果 fastblur 毛玻璃欄目 Android 简体版

原文原文鏈接

1、按壓縮放效果

ImageView實現按壓後實現動畫縮小，鬆手或者滑出ImageView的邊界時，實現動畫放大效果。android

具體案例請參考去哪兒網的【去哪兒旅行app】app

首先是佈局文件image_wall_layout.xmlide

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center"
    android:orientation="horizontal"
    android:padding="10dip"
    android:weightSum="2" >

    <ImageView
        android:id="@+id/layout_wallitem_1"
        android:layout_width="match_parent"
        android:layout_height="80dip"
        android:layout_marginBottom="16dip"
        android:layout_weight="1"
        android:scaleType="fitCenter"
        android:src="@drawable/ic_category_15" />

    <View
        android:layout_width="16dip"
        android:layout_height="match_parent" />

    <ImageView
        android:id="@+id/layout_wallitem_2"
        android:layout_width="match_parent"
        android:layout_height="80dip"
        android:layout_marginBottom="16dip"
        android:layout_weight="1"
        android:scaleType="fitCenter"
        android:src="@drawable/ic_category_2" />

</LinearLayout>

Activity代碼佈局

public class ImageWallActivity extends Activity implements OnTouchListener {

	private View leftLayoutItem;
	
	private View rightLayoutItem;
	
	@TargetApi(Build.VERSION_CODES.ICE_CREAM_SANDWICH)
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		
		setContentView(R.layout.image_wall_layout);
		
		leftLayoutItem =  findViewById(R.id.layout_wallitem_1);
		rightLayoutItem =  findViewById(R.id.layout_wallitem_2);
		
		leftLayoutItem.setOnTouchListener(this);
		rightLayoutItem.setOnTouchListener(this);
		
	}
	
	@Override
	protected void onDestroy() {
		super.onDestroy();
	}

	@Override
	public boolean onTouch(View v, MotionEvent event) {

		switch (event.getAction()) 
		{
			case MotionEvent.ACTION_DOWN:
				scaleToSmaller(v);
				break;
			case MotionEvent.ACTION_CANCEL:
			case MotionEvent.ACTION_UP:
				scaleToNormal(v);
				break;
			default:
				break;
		}
			//這裡必須是true,否則事件監聽有問題
		return true;
	}
	private void scaleToSmaller(View v)
	{
		Animation loadAnimation = AnimationUtils.loadAnimation(this, R.anim.scale_xysize_smaller_anim);
		v.clearAnimation();
		v.startAnimation(loadAnimation);
	}
	private void scaleToNormal(View v)
	{
		Animation loadAnimation = AnimationUtils.loadAnimation(this, R.anim.scale_xysize_normal_anim);
		v.clearAnimation();
		v.startAnimation(loadAnimation);
	}
}

動畫代碼動畫

scale_xysize_normal_anim.xmlui

<?xml version="1.0" encoding="utf-8"?>
<scale 
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:interpolator="@android:anim/bounce_interpolator"
    android:duration="300"
    android:fromXScale="0.9"
    android:fromYScale="0.9"
    android:toXScale="1"
    android:toYScale="1"
    android:pivotX="50%"
    android:pivotY="50%"
    android:fillAfter="true"
    />

scale_xysize_smaller_anim.xmlthis

<?xml version="1.0" encoding="utf-8"?>
<scale 
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:interpolator="@android:anim/accelerate_interpolator"
    android:duration="300"
    android:fromXScale="1"
    android:fromYScale="1"
    android:toXScale="0.9"
    android:toYScale="0.9"
    android:pivotX="50%"
    android:pivotY="50%"
    android:fillAfter="true"
    />

問題來了，發現點擊是能夠了，按壓時縮小，鬆手或者滑出邊界也自動放大了，但新的問題來了，點擊事件沒法監聽，解決辦法以下spa

private long startTime = 0;
	
	@Override
	public boolean onTouch(View v, MotionEvent event) {

		
		switch (event.getAction()) 
		{
			case MotionEvent.ACTION_DOWN:
				scaleToSmaller(v);
				startTime = System.currentTimeMillis();
				break;
			case MotionEvent.ACTION_CANCEL:
			case MotionEvent.ACTION_UP:
				scaleToNormal(v);
				if(System.currentTimeMillis()-startTime<=800)
				{
					onItemClick(v);
				}
				break;
			default:
				break;
		}
			//這裡必須是true,否則事件監聽有問題
		return true;
	}
	
	public void onItemClick(View v) {
		
		Log.d("v", "id="+v.getId());
	}

正常狀態code

點擊左圖標，以動畫的方式縮小，手指釋放，以動畫的方式還原orm

點擊右圖標，以動畫的方式縮小，手指釋放，以動畫的方式還原

2、毛玻璃效果

說明：須要的jar爲:android-17版本及以上版本（或者須要android-support-v8-renderscript.jar），對於SDK版本較低的同窗，可使用android-support-v8-rendscript.jar，

假如說你上面2個都沒有咋辦，看下面的代碼註釋部分，可移除部分

package com.charbgr.BlurNavigationDrawer;

public class BlurUtils {

    @SuppressLint("NewApi") 
    public static Bitmap fastblur(Context context, Bitmap sentBitmap, int radius, boolean canReuseInBitmap) {

    /***************************start:可移除部分************************************/
        if (VERSION.SDK_INT >= 17) 
        {
            Bitmap bitmap = sentBitmap.copy(sentBitmap.getConfig(), true);

            final RenderScript rs = RenderScript.create(context);
            final Allocation input = Allocation.createFromBitmap(
                    rs,
                    sentBitmap,
                    Allocation.MipmapControl.MIPMAP_NONE,
                    Allocation.USAGE_SCRIPT);

            final Allocation output = Allocation.createTyped(rs, input.getType());
            final ScriptIntrinsicBlur script = ScriptIntrinsicBlur.create(rs, Element.U8_4(rs));
            script.setRadius(radius /* e.g. 3.f */);
            script.setInput(input);
            script.forEach(output);
            output.copyTo(bitmap);
            return bitmap;
        }
 /***************************end:可移除部分************************************/
 
 
        // Stack Blur Algorithm by Mario Klingemann <mario@quasimondo.com>

        Bitmap bitmap;
        if (canReuseInBitmap) {
            bitmap = sentBitmap;
        } else {
            bitmap = sentBitmap.copy(sentBitmap.getConfig(), true);
        }

        if (radius < 1) {
            return (null);
        }

        int w = bitmap.getWidth();
        int h = bitmap.getHeight();

        int[] pix = new int[w * h];
        bitmap.getPixels(pix, 0, w, 0, 0, w, h);

        int wm = w - 1;
        int hm = h - 1;
        int wh = w * h;
        int div = radius + radius + 1;

        int r[] = new int[wh];
        int g[] = new int[wh];
        int b[] = new int[wh];
        int rsum, gsum, bsum, x, y, i, p, yp, yi, yw;
        int vmin[] = new int[Math.max(w, h)];

        int divsum = (div + 1) >> 1;
        divsum *= divsum;
        int dv[] = new int[256 * divsum];
        for (i = 0; i < 256 * divsum; i++) {
            dv[i] = (i / divsum);
        }

        yw = yi = 0;

        int[][] stack = new int[div][3];
        int stackpointer;
        int stackstart;
        int[] sir;
        int rbs;
        int r1 = radius + 1;
        int routsum, goutsum, boutsum;
        int rinsum, ginsum, binsum;

        for (y = 0; y < h; y++) {
            rinsum = ginsum = binsum = routsum = goutsum = boutsum = rsum = gsum = bsum = 0;
            for (i = -radius; i <= radius; i++) {
                p = pix[yi + Math.min(wm, Math.max(i, 0))];
                sir = stack[i + radius];
                sir[0] = (p & 0xff0000) >> 16;
                sir[1] = (p & 0x00ff00) >> 8;
                sir[2] = (p & 0x0000ff);
                rbs = r1 - Math.abs(i);
                rsum += sir[0] * rbs;
                gsum += sir[1] * rbs;
                bsum += sir[2] * rbs;
                if (i > 0) {
                    rinsum += sir[0];
                    ginsum += sir[1];
                    binsum += sir[2];
                } else {
                    routsum += sir[0];
                    goutsum += sir[1];
                    boutsum += sir[2];
                }
            }
            stackpointer = radius;

            for (x = 0; x < w; x++) {

                r[yi] = dv[rsum];
                g[yi] = dv[gsum];
                b[yi] = dv[bsum];

                rsum -= routsum;
                gsum -= goutsum;
                bsum -= boutsum;

                stackstart = stackpointer - radius + div;
                sir = stack[stackstart % div];

                routsum -= sir[0];
                goutsum -= sir[1];
                boutsum -= sir[2];

                if (y == 0) {
                    vmin[x] = Math.min(x + radius + 1, wm);
                }
                p = pix[yw + vmin[x]];

                sir[0] = (p & 0xff0000) >> 16;
                sir[1] = (p & 0x00ff00) >> 8;
                sir[2] = (p & 0x0000ff);

                rinsum += sir[0];
                ginsum += sir[1];
                binsum += sir[2];

                rsum += rinsum;
                gsum += ginsum;
                bsum += binsum;

                stackpointer = (stackpointer + 1) % div;
                sir = stack[(stackpointer) % div];

                routsum += sir[0];
                goutsum += sir[1];
                boutsum += sir[2];

                rinsum -= sir[0];
                ginsum -= sir[1];
                binsum -= sir[2];

                yi++;
            }
            yw += w;
        }
        for (x = 0; x < w; x++) {
            rinsum = ginsum = binsum = routsum = goutsum = boutsum = rsum = gsum = bsum = 0;
            yp = -radius * w;
            for (i = -radius; i <= radius; i++) {
                yi = Math.max(0, yp) + x;

                sir = stack[i + radius];

                sir[0] = r[yi];
                sir[1] = g[yi];
                sir[2] = b[yi];

                rbs = r1 - Math.abs(i);

                rsum += r[yi] * rbs;
                gsum += g[yi] * rbs;
                bsum += b[yi] * rbs;

                if (i > 0) {
                    rinsum += sir[0];
                    ginsum += sir[1];
                    binsum += sir[2];
                } else {
                    routsum += sir[0];
                    goutsum += sir[1];
                    boutsum += sir[2];
                }

                if (i < hm) {
                    yp += w;
                }
            }
            yi = x;
            stackpointer = radius;
            for (y = 0; y < h; y++) {
                // Preserve alpha channel: ( 0xff000000 & pix[yi] )
                pix[yi] = (0xff000000 & pix[yi]) | (dv[rsum] << 16) | (dv[gsum] << 8) | dv[bsum];

                rsum -= routsum;
                gsum -= goutsum;
                bsum -= boutsum;

                stackstart = stackpointer - radius + div;
                sir = stack[stackstart % div];

                routsum -= sir[0];
                goutsum -= sir[1];
                boutsum -= sir[2];

                if (x == 0) {
                    vmin[y] = Math.min(y + r1, hm) * w;
                }
                p = x + vmin[y];

                sir[0] = r[p];
                sir[1] = g[p];
                sir[2] = b[p];

                rinsum += sir[0];
                ginsum += sir[1];
                binsum += sir[2];

                rsum += rinsum;
                gsum += ginsum;
                bsum += binsum;

                stackpointer = (stackpointer + 1) % div;
                sir = stack[stackpointer];

                routsum += sir[0];
                goutsum += sir[1];
                boutsum += sir[2];

                rinsum -= sir[0];
                ginsum -= sir[1];
                binsum -= sir[2];

                yi += w;
            }
        }

        bitmap.setPixels(pix, 0, w, 0, 0, w, h);
        return (bitmap);
    }

}

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