安卓高斯模糊特效blur_demo(包含viewpager切换动画)
public class MainActivity extends FragmentActivity {//高斯模糊效果的主方法入口
private ViewPager viewPager;private CustomPagerAdapter pagerAdapter;//自定义页面适配器
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
viewPager = (ViewPager) findViewById(R.id.viewpager);
pagerAdapter =
new CustomPagerAdapter(
getSupportFragmentManager());
viewPager.setAdapter(pagerAdapter);
viewPager.setPageTransformer(true, new ZoomOutPageTransformer());//切换的动画效果，缩放效果
}
public class CustomPagerAdapter extends FragmentStatePagerAdapter {
private ArrayList
public CustomPagerAdapter(FragmentManager fm) {
super(fm);
fragments.add(Fragment.instantiate(MainActivity.this,
Fragment_First.class.getName()));
fragments.add(Fragment.instantiate(MainActivity.this,
Fragment_Two.class.getName()));
fragments.add(Fragment.instantiate(MainActivity.this,
Fragment_Three.class.getName()));
}
@Override
public Fragment getItem(int i) {
return fragments.get(i);
}
@Override
public int getCount() {
return fragments.size();
}
@Override
public CharSequence getPageTitle(int position) {
return fragments.get(position).toString();
}
}
}
//主界面布局文件代码如下：
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
>
android:layout_height="40dp"
android:background="@drawable/im_top_default_bk"
android:gravity="center"
android:orientation="vertical" >
android:layout_height="wrap_content"
android:layout_marginLeft="100dp"
android:layout_marginRight="100dp"
android:gravity="center"
android:text="高斯模糊"
android:textSize="25sp"
android:textColor="#fff"
/>
android:layout_height="40dp"
android:background="#fff"
android:orientation="vertical" >
android:layout_height="37dip"
android:gravity="center"
android:orientation="horizontal"
android:weightSum="3" >
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="center"
android:orientation="horizontal" >
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:gravity="center"
android:text="第一个"
android:textColor="@color/red"
android:textSize="18sp" />
android:layout_height="wrap_content"
android:layout_weight="1"
android:orientation="horizontal" >
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:gravity="center"
android:text="第二个"
android:textColor="@color/gray"
android:textSize="18sp" />
android:layout_height="wrap_content"
android:layout_weight="1"
android:orientation="horizontal" >
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:gravity="center"
android:text="第三个"
android:textColor="@color/gray"
android:textSize="18sp" />
android:layout_height="wrap_content"
android:orientation="horizontal" >
android:layout_width="fill_parent"
android:layout_height="2dp"
android:layout_weight="1"
android:scaleType="fitXY"
android:src="@drawable/tab_line" />
android:layout_width="fill_parent"
android:layout_height="2dp"
android:layout_weight="1"
android:scaleType="fitXY" />
android:layout_width="fill_parent"
android:layout_height="2dp"
android:layout_weight="1"
android:scaleType="fitXY" />
android:background="@color/light_grey"
android:layout_width="match_parent"
android:layout_height="match_parent"
/>
//三个fragment页面代码如下：
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.drawable.BitmapDrawable;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewTreeObserver;
import android.widget.ImageView;
import android.widget.TextView;
import com.example.blurdemo02.R;
import com.example.blurdemo02.util.FastBlur;
public class Fragment_First extends Fragment{
private View view;
private ImageView image;
TextView textView1;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
view = inflater.inflate(R.layout.fragment_first, container, false);
image = (ImageView) view.findViewById(R.id.picture1);
textView1= (TextView) view.findViewById(R.id.textView1);
image.setImageResource(R.drawable.picture);
applyBlur();
return view;
}
@Override
public String toString() {
return "First";
}
private void applyBlur() {
image.getViewTreeObserver().addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener() {
@Override
public boolean onPreDraw() {
image.getViewTreeObserver().removeOnPreDrawListener(this);
image.buildDrawingCache();
Bitmap bmp = image.getDrawingCache();
blur(bmp, textView1);
return true;
}
});
}
private void blur(Bitmap bkg, View view) {
long startMs = System.currentTimeMillis();
float scaleFactor = 1;
float radius = 20;
Bitmap overlay = Bitmap.createBitmap((int) (view.getMeasuredWidth() / scaleFactor),
(int) (view.getMeasuredHeight() / scaleFactor), Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(overlay);
canvas.translate(-view.getLeft() / scaleFactor, -view.getTop() / scaleFactor);
canvas.scale(1 / scaleFactor, 1 / scaleFactor);
Paint paint = new Paint();
paint.setFlags(Paint.FILTER_BITMAP_FLAG);
canvas.drawBitmap(bkg, 0, 0, paint);
overlay = FastBlur.doBlur(overlay, (int) radius, true);
view.setBackgroundDrawable(new BitmapDrawable(getResources(), overlay));
}
}
//第一个fragment布局如下：
android:layout_height="match_parent"
android:orientation="vertical" >
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scaleType="centerCrop"
/>
android:layout_width="match_parent"
android:layout_height="200dip"
android:gravity="center"
android:layout_marginTop="35dip"
android:text="Fragment_First"
android:textColor="#fff"
android:textAppearance="?android:attr/textAppearanceLarge" />
//以下代码为三个工具类FastBlur，ImageBlur，ZoomOutPageTransformer：
import android.graphics.Bitmap;
public class FastBlur {
public static Bitmap doBlurJniArray(Bitmap sentBitmap, int radius, boolean canReuseInBitmap) {
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);
//Jni 数组计算
ImageBlur.blurIntArray(pix, w, h, radius);
bitmap.setPixels(pix, 0, w, 0, 0, w, h);
return (bitmap);
}
public static Bitmap doBlurJniBitMap(Bitmap sentBitmap, int radius, boolean canReuseInBitmap) {
Bitmap bitmap;
if (canReuseInBitmap) {
bitmap = sentBitmap;
} else {
bitmap = sentBitmap.copy(sentBitmap.getConfig(), true);
}
if (radius < 1) {
return (null);
}
//Jni BitMap
ImageBlur.blurBitMap(bitmap, radius);
return (bitmap);
}
public static Bitmap doBlur(Bitmap sentBitmap, int radius, boolean canReuseInBitmap) {
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);
}
}
import android.graphics.Bitmap;
public class ImageBlur {
public static native void blurIntArray(int[] pImg, int w, int h, int r);
public static native void blurBitMap(Bitmap bitmap, int r);
static {
System.loadLibrary("JNI_ImageBlur");
}
}
import android.annotation.SuppressLint;
import android.support.v4.view.ViewPager;
import android.view.View;
public class ZoomOutPageTransformer implements ViewPager.PageTransformer {
private static final float MIN_SCALE = 0.85f;
private static final float MIN_ALPHA = 0.5f;
@SuppressLint("NewApi")
public void transformPage(View view, float position) {
int pageWidth = view.getWidth();
int pageHeight = view.getHeight();
if (position < -1) { // [-Infinity,-1)
// This page is way off-screen to the left.
view.setAlpha(0);
} else if (position <= 1) { // [-1,1]
// Modify the default slide transition to shrink the page as well
float scaleFactor = Math.max(MIN_SCALE, 1 - Math.abs(position));
float vertMargin = pageHeight * (1 - scaleFactor) / 2;
float horzMargin = pageWidth * (1 - scaleFactor) / 2;
if (position < 0) {
view.setTranslationX(horzMargin - vertMargin / 2);
} else {
view.setTranslationX(-horzMargin + vertMargin / 2);
}
// Scale the page down (between MIN_SCALE and 1)
view.setScaleX(scaleFactor);
view.setScaleY(scaleFactor);
// Fade the page relative to its size.
view.setAlpha(MIN_ALPHA +
(scaleFactor - MIN_SCALE) /
(1 - MIN_SCALE) * (1 - MIN_ALPHA));
} else { // (1,+Infinity]
// This page is way off-screen to the right.
view.setAlpha(0);
}
}
}
