默认.png
下拉之后.png
- 高斯模糊工具类
public class BitmapBlurUtil {
private static ExecutorService executor;
private static int POOL_SIZE = 2;// 单个CPU线程池大小
private static ExecutorService getExecutor() {
if (executor == null) {
int cpuNums = Runtime.getRuntime().availableProcessors();
executor = Executors.newFixedThreadPool(cpuNums * POOL_SIZE);
}
return executor;
}
public static void addTask(Bitmap bitmap, Handler handler) {
getExecutor().submit(new BitmapVagueTask(bitmap, handler));
}
/**
* 水平方向模糊度
*/
private static float hRadius = 3;
/**
* 竖直方向模糊度
*/
private static float vRadius = 3;
/**
* 模糊迭代度
*/
private static int iterations = 5;
/**
* 异步
*
* @author baiyuliang
*/
private static class BitmapVagueTask implements Runnable {
private Bitmap bitmap;
private Handler handler;
public BitmapVagueTask(Bitmap bitmap, Handler handler) {
super();
this.bitmap = bitmap;
this.handler = handler;
}
@Override
public void run() {
boxBlurFilter(bitmap, handler);
}
}
/**
* 高斯模糊
*
* @param bmp
* @return
*/
private static void boxBlurFilter(Bitmap bmp, Handler handler) {
int width = bmp.getWidth();
int height = bmp.getHeight();
int[] inPixels = new int[width * height];
int[] outPixels = new int[width * height];
Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
bmp.getPixels(inPixels, 0, width, 0, 0, width, height);
for (int i = 0; i < iterations; i++) {
blur(inPixels, outPixels, width, height, hRadius);
blur(outPixels, inPixels, height, width, vRadius);
}
blurFractional(inPixels, outPixels, width, height, hRadius);
blurFractional(outPixels, inPixels, height, width, vRadius);
bitmap.setPixels(inPixels, 0, width, 0, 0, width, height);
if (handler != null) {
@SuppressWarnings("deprecation")
Drawable drawable = new BitmapDrawable(bitmap);
Message message = new Message();
message.obj = drawable;
handler.sendMessage(message);
}
}
private static void blur(int[] in, int[] out, int width, int height, float radius) {
int widthMinus1 = width - 1;
int r = (int) radius;
int tableSize = 2 * r + 1;
int divide[] = new int[256 * tableSize];
for (int i = 0; i < 256 * tableSize; i++)
divide[i] = i / tableSize;
int inIndex = 0;
for (int y = 0; y < height; y++) {
int outIndex = y;
int ta = 0, tr = 0, tg = 0, tb = 0;
for (int i = -r; i <= r; i++) {
int rgb = in[inIndex + clamp(i, 0, width - 1)];
ta += (rgb >> 24) & 0xff;
tr += (rgb >> 16) & 0xff;
tg += (rgb >> 8) & 0xff;
tb += rgb & 0xff;
}
for (int x = 0; x < width; x++) {
out[outIndex] = (divide[ta] << 24) | (divide[tr] << 16)
| (divide[tg] << 8) | divide[tb];
int i1 = x + r + 1;
if (i1 > widthMinus1)
i1 = widthMinus1;
int i2 = x - r;
if (i2 < 0)
i2 = 0;
int rgb1 = in[inIndex + i1];
int rgb2 = in[inIndex + i2];
ta += ((rgb1 >> 24) & 0xff) - ((rgb2 >> 24) & 0xff);
tr += ((rgb1 & 0xff0000) - (rgb2 & 0xff0000)) >> 16;
tg += ((rgb1 & 0xff00) - (rgb2 & 0xff00)) >> 8;
tb += (rgb1 & 0xff) - (rgb2 & 0xff);
outIndex += height;
}
inIndex += width;
}
}
private static void blurFractional(int[] in, int[] out, int width,
int height, float radius) {
radius -= (int) radius;
float f = 1.0f / (1 + 2 * radius);
int inIndex = 0;
for (int y = 0; y < height; y++) {
int outIndex = y;
out[outIndex] = in[0];
outIndex += height;
for (int x = 1; x < width - 1; x++) {
int i = inIndex + x;
int rgb1 = in[i - 1];
int rgb2 = in[i];
int rgb3 = in[i + 1];
int a1 = (rgb1 >> 24) & 0xff;
int r1 = (rgb1 >> 16) & 0xff;
int g1 = (rgb1 >> 8) & 0xff;
int b1 = rgb1 & 0xff;
int a2 = (rgb2 >> 24) & 0xff;
int r2 = (rgb2 >> 16) & 0xff;
int g2 = (rgb2 >> 8) & 0xff;
int b2 = rgb2 & 0xff;
int a3 = (rgb3 >> 24) & 0xff;
int r3 = (rgb3 >> 16) & 0xff;
int g3 = (rgb3 >> 8) & 0xff;
int b3 = rgb3 & 0xff;
a1 = a2 + (int) ((a1 + a3) * radius);
r1 = r2 + (int) ((r1 + r3) * radius);
g1 = g2 + (int) ((g1 + g3) * radius);
b1 = b2 + (int) ((b1 + b3) * radius);
a1 *= f;
r1 *= f;
g1 *= f;
b1 *= f;
out[outIndex] = (a1 << 24) | (r1 << 16) | (g1 << 8) | b1;
outIndex += height;
}
out[outIndex] = in[width - 1];
inIndex += width;
}
}
public static int clamp(int x, int a, int b) {
return (x < a) ? a : (x > b) ? b : x;
}
}
- 带边框的圆形图 首先在attrs 文件 定义两个属性
<declare-styleable name="circle">
<attr name="civ_border_color" format="color" />
<attr name="civ_border_width" format="dimension" />
</declare-styleable>
- 圆形图代码
public class CircularImageView extends ImageView {
private int borderWidth = 4;
private int viewWidth;
private int viewHeight;
private Bitmap image;
private Paint paint;
private Paint paintBorder;
private BitmapShader shader;
public CircularImageView(Context context)
{
super(context);
setup();
}
public CircularImageView(Context context, AttributeSet attrs)
{
super(context, attrs);
setup();
}
public CircularImageView(Context context, AttributeSet attrs, int defStyle)
{
super(context, attrs, defStyle);
setup();
}
private void setup() {
paint = new Paint();// init paint
paint.setAntiAlias(true);
paintBorder = new Paint();
setBorderColor(Color.WHITE);
paintBorder.setAntiAlias(true);
this.setLayerType(LAYER_TYPE_SOFTWARE, paintBorder);
paintBorder.setShadowLayer(4.0f, 0.0f, 2.0f, Color.BLACK);
}
public void setBorderWidth(int borderWidth)
{
this.borderWidth = borderWidth;
this.invalidate();
}
public void setBorderColor(int borderColor)
{
if (paintBorder != null)
paintBorder.setColor(borderColor);
this.invalidate();
}
private void loadBitmap()
{
BitmapDrawable bitmapDrawable = (BitmapDrawable) this.getDrawable();
if (bitmapDrawable != null)
image = bitmapDrawable.getBitmap();
}
@SuppressLint("DrawAllocation")
@Override
public void onDraw(Canvas canvas) {
loadBitmap();// load the bitmap
if (image != null)// init shader
{
shader = new BitmapShader(Bitmap.createScaledBitmap(image, canvas.getWidth(), canvas.getHeight(), false), Shader.TileMode.CLAMP, Shader.TileMode.CLAMP);
paint.setShader(shader);
int circleCenter = viewWidth / 2;
canvas.drawCircle(circleCenter + borderWidth, circleCenter + borderWidth, circleCenter + borderWidth - 4.0f, paintBorder);
canvas.drawCircle(circleCenter + borderWidth, circleCenter + borderWidth, circleCenter - 4.0f, paint);
}
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec)
{
int width = measureWidth(widthMeasureSpec);
int height = measureHeight(heightMeasureSpec, widthMeasureSpec);
viewWidth = width - (borderWidth * 2);
viewHeight = height - (borderWidth * 2);
setMeasuredDimension(width, height);
}
private int measureWidth(int measureSpec)
{
int result = 0;
int specMode = MeasureSpec.getMode(measureSpec);
int specSize = MeasureSpec.getSize(measureSpec);
if (specMode == MeasureSpec.EXACTLY)
{
result = specSize;
}
else
{
result = viewWidth;
}
return result;
}
private int measureHeight(int measureSpecHeight, int measureSpecWidth)
{
int result = 0;
int specMode = MeasureSpec.getMode(measureSpecHeight);
int specSize = MeasureSpec.getSize(measureSpecHeight);
if (specMode == MeasureSpec.EXACTLY) {
result = specSize;
} else{
result = viewHeight;
}
return (result + 2);
}
/**
* 把bitmap转成圆形
*/
public Bitmap toRoundBitmap(Bitmap bitmap) {
int width = bitmap.getWidth();
int height = bitmap.getHeight();
int r = 0;
if (width < height) {
r = width;
} else {
r = height;
}
Bitmap backgroundBm = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);//构建一个bitmap
Canvas canvas = new Canvas(backgroundBm);//new一个Canvas，在backgroundBmp上画图
Paint p = new Paint();//设置边缘光滑，去掉锯齿
p.setAntiAlias(true);
RectF rect = new RectF(0, 0, r, r);
canvas.drawRoundRect(rect, r / 2, r / 2, p);//通过制定的rect画一个圆角矩形，当圆角X轴方向的半径等于Y轴方向的半径时，且都等于r/2时，画出来的圆角矩形就是圆
p.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN));//设置当两个图形相交时的模式，SRC_IN为取SRC图形相交的部分，多余的将被去掉
canvas.drawBitmap(bitmap, null, rect, p);//canvas将bitmap画在backgroundBmp上
return backgroundBm; }}
- PullScrollView
public class PullScrollView extends ScrollView implements
ViewTreeObserver.OnGlobalLayoutListener {
View view;
int srcTopMargion;
float lastY;
float offsetY;
public PullScrollView(Context context, AttributeSet attrs) {
super(context, attrs);
ViewTreeObserver observer = getViewTreeObserver();
if (null != observer)
observer.addOnGlobalLayoutListener(this);
}
@Override
protected void onFinishInflate() {
super.onFinishInflate();
view = findViewById(R.id.pull_img);
}
@Override
public boolean onTouchEvent(MotionEvent ev) {
int action = ev.getAction();
float y = ev.getY();
Log.d("onTouchEvent", "action=" + action + ",y=" + y);
MarginLayoutParams params = (MarginLayoutParams) view.getLayoutParams();
switch (action) {
case MotionEvent.ACTION_DOWN:
lastY = y;
break;
case MotionEvent.ACTION_MOVE:
//计算滑动y方向偏移值
offsetY = y - lastY;
//向下移动
if (offsetY > 0) {
//滑动到看到所有图片展示，交给原来的逻辑处理
if (params.topMargin == 0) {
return super.onTouchEvent(ev);
}
//在不是下拉图片的时候，向下移动，交给原来的逻辑处理
if (getScrollY() != 0) {
return super.onTouchEvent(ev);
}
//可以下拉图片的情况
params.topMargin += offsetY / 10;
Log.d("onTouchEvent", "topMargin" + params.topMargin + ",lastY=" + lastY + ",y=" + y + ",offsetY" + offsetY);
if (params.topMargin >= 0) {
params.topMargin = 0;
}
view.setLayoutParams(params);
invalidate();
}
lastY = y;
break;
case MotionEvent.ACTION_UP:
//不和原始margion偏移一样的时候
if (params.topMargin != -srcTopMargion) {
Log.d("ACTION_UP", "moveY=" + (srcTopMargion + params.topMargin));
//滚动原始偏移值和现在偏移值之间的差值 eg:3~10
ObjectAnimator animator = ObjectAnimator.ofInt(this, "moveY", params.topMargin, -srcTopMargion);
animator.setDuration(200);
animator.setInterpolator(new AccelerateDecelerateInterpolator());
animator.start();
}
break;
}
return super.onTouchEvent(ev);
}
/**
* 设置移动中的Y值
*
* @param value
*/
public void setMoveY(int value) {
MarginLayoutParams params = (MarginLayoutParams) view.getLayoutParams();
params.topMargin = value;
Log.d("computeScroll", "topMargin=" + params.topMargin);
view.setLayoutParams(params);
invalidate();
}
@Override
public void onGlobalLayout() {
MarginLayoutParams params = (MarginLayoutParams) view.getLayoutParams();
srcTopMargion = -params.topMargin;
Log.d("srcTopMargion", "" + srcTopMargion);
getViewTreeObserver()
.removeGlobalOnLayoutListener(this);
}}
-
布局文件
E1AA3EA2-0FE3-4189-9C8A-0F1579D18087.png
- activity
public class PersonalActivity extends Activity implements View.OnClickListener {
ImageView pull_img;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.layout);
pull_img = (ImageView) findViewById(R.id.pull_img);
Resources res = getResources();
Bitmap bmp = BitmapFactory.decodeResource(res, R.mipmap.pull_img);
BitmapBlurUtil.addTask(bmp, new Handler() {
@Override
public void handleMessage(Message msg) {
super.handleMessage(msg);
Drawable drawable = (Drawable) msg.obj;
pull_img.setImageDrawable(drawable);
}
});
}
@Override
public void onClick(View view) {
}
}
