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flyingsnowff:
支付宝官方在线文档中心:https://doc.open.al ...
如何集成支付宝官方文档 -
timer_yin:
果然是这样
[转帖] 安装Eclipse插件长时间卡在 calculating requirements and dependencies -
dai_lm:
lyx0224 写道强~~~~~过奖,只是总结了前人的智慧,拼 ...
通过Wifi实现设备间的通信 -
lyx0224:
强~~~~~
通过Wifi实现设备间的通信 -
Goro:
帅!
自己封装的支持自动对焦的CameraView
网上找了很久,都是用Gallery实现的,效果不是很满意,结果发现这个用OpenGL实现的,稍微修改了一下源码,实现了无限循环功能
源码地址:https://github.com/jackfengji/glcoverflow
使用时
源码地址:https://github.com/jackfengji/glcoverflow
public class CoverFlowOpenGL extends GLSurfaceView implements GLSurfaceView.Renderer { private static final int TOUCH_MINIMUM_MOVE = 5; private static final int IMAGE_SIZE = 128; private static final int MAX_TILES = 48; // the visble tiles left and right private static final int VISIBLE_TILES = 1; private static final float SCALE = 0.7f; private static final float SPREAD_IMAGE = 0.14f; private static final float FLANK_SPREAD = 0.4f; private static final float FRICTION = 10.0f; private static final float MAX_SPEED = 6.0f; private static final float[] GVertices = new float[] { -1.0f, -1.0f, 0.0f, 1.0f, -1.0f, 0.0f, -1.0f, 1.0f, 0.0f, 1.0f, 1.0f, 0.0f, }; private static final float[] GTextures = new float[] { 0.0f, 1.0f, 1.0f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, }; private GL10 mGLContext; private FloatBuffer mVerticesBuffer; private FloatBuffer mTexturesBuffer; private float[] mMatrix; private int mBgTexture; private FloatBuffer mBgVerticesBuffer; private FloatBuffer mBgTexturesBuffer; private int mBgBitmapId; private boolean mInitBackground; private float mOffset; private int mLastOffset; private RectF mTouchRect; private int mWidth; private boolean mTouchMoved; private float mTouchStartPos; private float mTouchStartX; private float mTouchStartY; private float mStartOffset; private long mStartTime; private float mStartSpeed; private float mDuration; private Runnable mAnimationRunnable; private VelocityTracker mVelocity; private CoverFlowListener mListener; private DataCache<Integer, CoverFlowRecord> mCache; public CoverFlowOpenGL(Context context) { super(context); setEGLConfigChooser(8, 8, 8, 8, 16, 0); setRenderer(this); setRenderMode(RENDERMODE_WHEN_DIRTY); getHolder().setFormat(PixelFormat.TRANSLUCENT); mCache = new DataCache<Integer, CoverFlowRecord>(MAX_TILES); mLastOffset = 0; mOffset = 0; mInitBackground = false; mBgBitmapId = 0; } public void setCoverFlowListener(CoverFlowListener listener) { mListener = listener; } public void setSelection(int position) { endAnimation(); mOffset = position; requestRender(); } private int getActuallyPosition(int position) { int max = mListener.getCount(this); while (position < 0 || position >= max) { if (position < 0) position += max; else if (position >= max) position -= max; } return position; } @Override public boolean onTouchEvent(MotionEvent event) { int action = event.getAction(); switch (action) { case MotionEvent.ACTION_DOWN: touchBegan(event); return true; case MotionEvent.ACTION_MOVE: touchMoved(event); return true; case MotionEvent.ACTION_UP: touchEnded(event); return true; } return false; } private void touchBegan(MotionEvent event) { endAnimation(); float x = event.getX(); mTouchStartX = x; mTouchStartY = event.getY(); mStartTime = System.currentTimeMillis(); mStartOffset = mOffset; mTouchMoved = false; mTouchStartPos = (x / mWidth) * 10 - 5; mTouchStartPos /= 2; mVelocity = VelocityTracker.obtain(); mVelocity.addMovement(event); } private void touchMoved(MotionEvent event) { float pos = (event.getX() / mWidth) * 10 - 5; pos /= 2; if (!mTouchMoved) { float dx = Math.abs(event.getX() - mTouchStartX); float dy = Math.abs(event.getY() - mTouchStartY); if (dx < TOUCH_MINIMUM_MOVE && dy < TOUCH_MINIMUM_MOVE) return; mTouchMoved = true; } mOffset = mStartOffset + mTouchStartPos - pos; requestRender(); mVelocity.addMovement(event); } private void touchEnded(MotionEvent event) { float pos = (event.getX() / mWidth) * 10 - 5; pos /= 2; if (mTouchMoved) { mStartOffset += mTouchStartPos - pos; mOffset = mStartOffset; mVelocity.addMovement(event); mVelocity.computeCurrentVelocity(1000); double speed = mVelocity.getXVelocity(); speed = (speed / mWidth) * 10; if (speed > MAX_SPEED) speed = MAX_SPEED; else if (speed < -MAX_SPEED) speed = -MAX_SPEED; startAnimation(-speed); } else { if (mTouchRect.contains(event.getX(), event.getY())) { mListener.topTileClicked(this, getActuallyPosition((int) (mOffset + 0.01))); } } } private void startAnimation(double speed) { if (mAnimationRunnable != null) return; double delta = speed * speed / (FRICTION * 2); if (speed < 0) delta = -delta; double nearest = mStartOffset + delta; nearest = Math.floor(nearest + 0.5); mStartSpeed = (float) Math.sqrt(Math.abs(nearest - mStartOffset) * FRICTION * 2); if (nearest < mStartOffset) mStartSpeed = -mStartSpeed; mDuration = Math.abs(mStartSpeed / FRICTION); mStartTime = AnimationUtils.currentAnimationTimeMillis(); mAnimationRunnable = new Runnable() { @Override public void run() { driveAnimation(); } }; post(mAnimationRunnable); } private void driveAnimation() { float elapsed = (AnimationUtils.currentAnimationTimeMillis() - mStartTime) / 1000.0f; if (elapsed >= mDuration) endAnimation(); else { updateAnimationAtElapsed(elapsed); post(mAnimationRunnable); } } private void endAnimation() { if (mAnimationRunnable != null) { mOffset = (float) Math.floor(mOffset + 0.5); requestRender(); removeCallbacks(mAnimationRunnable); mAnimationRunnable = null; } } private void updateAnimationAtElapsed(float elapsed) { if (elapsed > mDuration) elapsed = mDuration; float delta = Math.abs(mStartSpeed) * elapsed - FRICTION * elapsed * elapsed / 2; if (mStartSpeed < 0) delta = -delta; mOffset = mStartOffset + delta; requestRender(); } @Override public void onSurfaceCreated(GL10 gl, EGLConfig config) { mCache.clear(); mGLContext = gl; mVerticesBuffer = makeFloatBuffer(GVertices); mTexturesBuffer = makeFloatBuffer(GTextures); } @Override public void onSurfaceChanged(GL10 gl, int w, int h) { mWidth = w; float imagew = w * 0.45f / SCALE / 2.0f; float imageh = h * 0.45f / SCALE / 2.0f; mTouchRect = new RectF(w / 2 - imagew, h / 2 - imageh, w / 2 + imagew, h / 2 + imageh); gl.glViewport(0, 0, w, h); float ratio = ((float) w) / h; gl.glMatrixMode(GL10.GL_PROJECTION); gl.glLoadIdentity(); gl.glOrthof(-ratio * SCALE, ratio * SCALE, -1 * SCALE, 1 * SCALE, 1, 3); float[] vertices = new float[] { -ratio * SCALE, -SCALE, 0, ratio * SCALE, -SCALE, 0, -ratio * SCALE, SCALE, 0, ratio * SCALE, SCALE, 0 }; mBgVerticesBuffer = makeFloatBuffer(vertices); } public void setBackgroundTexture(int res) { mBgBitmapId = res; mInitBackground = true; } public void clearTileCache() { mCache.clear(); } private void initBg() { mInitBackground = false; if (mBgBitmapId != 0) { Bitmap bitmap = BitmapFactory.decodeResource(getResources(), mBgBitmapId); mBgBitmapId = 0; int tmp = 1; int w = bitmap.getWidth(); int h = bitmap.getHeight(); while (w > tmp || h > tmp) { tmp <<= 1; } int width = tmp; int height = tmp; Bitmap bm = Bitmap.createBitmap(width, height, Bitmap.Config.RGB_565); Canvas cv = new Canvas(bm); int left = (width - w) / 2; int top = (height - h) / 2; cv.drawBitmap(bitmap, left, top, new Paint()); GL10 gl = mGLContext; int[] tex = new int[1]; gl.glGenTextures(1, tex, 0); mBgTexture = tex[0]; gl.glBindTexture(GL10.GL_TEXTURE_2D, mBgTexture); GLUtils.texImage2D(GL10.GL_TEXTURE_2D, 0, bm, 0); bitmap.recycle(); bm.recycle(); gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_MIN_FILTER, GL10.GL_NEAREST); gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_MAG_FILTER, GL10.GL_LINEAR); gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_WRAP_S, GL10.GL_CLAMP_TO_EDGE); gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_WRAP_T, GL10.GL_CLAMP_TO_EDGE); gl.glTexEnvf(GL10.GL_TEXTURE_ENV, GL10.GL_TEXTURE_ENV_MODE, GL10.GL_REPLACE); float[] textcoor = new float[] { (tmp - w) / 2.0f / tmp, (tmp - h) / 2.0f / tmp, (tmp + w) / 2.0f / tmp, (tmp - h) / 2.0f / tmp, (tmp - w) / 2.0f / tmp, (tmp + h) / 2.0f / tmp, (tmp + w) / 2.0f / tmp, (tmp + h) / 2.0f / tmp }; mBgTexturesBuffer = makeFloatBuffer(textcoor); } } @Override public void onDrawFrame(GL10 gl) { gl.glMatrixMode(GL10.GL_MODELVIEW); gl.glLoadIdentity(); GLU.gluLookAt(gl, 0, 0, 2, 0f, 0f, 0f, 0f, 1.0f, 0.0f); gl.glDisable(GL10.GL_DEPTH_TEST); gl.glClearColor(0, 0, 0, 0); gl.glClear(GL10.GL_COLOR_BUFFER_BIT | GL10.GL_DEPTH_BUFFER_BIT); gl.glEnableClientState(GL10.GL_VERTEX_ARRAY); gl.glEnableClientState(GL10.GL_TEXTURE_COORD_ARRAY); drawBg(gl); draw(gl); } public void drawBg(GL10 gl) { if (mInitBackground) initBg(); if (mBgTexture != 0) { gl.glPushMatrix(); gl.glVertexPointer(3, GL10.GL_FLOAT, 0, mBgVerticesBuffer); gl.glTexCoordPointer(2, GL10.GL_FLOAT, 0, mBgTexturesBuffer); gl.glEnable(GL10.GL_TEXTURE_2D); gl.glBindTexture(GL10.GL_TEXTURE_2D, mBgTexture); gl.glDrawArrays(GL10.GL_TRIANGLE_STRIP, 0, 4); gl.glPopMatrix(); } } private void draw(GL10 gl) { gl.glPushMatrix(); gl.glVertexPointer(3, GL10.GL_FLOAT, 0, mVerticesBuffer); gl.glTexCoordPointer(2, GL10.GL_FLOAT, 0, mTexturesBuffer); gl.glEnable(GL10.GL_TEXTURE_2D); gl.glEnable(GL10.GL_BLEND); gl.glBlendFunc(GL10.GL_SRC_ALPHA, GL10.GL_ONE_MINUS_SRC_ALPHA); final float offset = mOffset; int i = 0; int mid = (int) Math.floor(offset + 0.5); // draw the left tiles int iStartPos = mid - VISIBLE_TILES; for (i = iStartPos; i < mid; ++i) { drawTile(i, i - offset, gl); } // draw the right tiles int iEndPos = mid + VISIBLE_TILES; for (i = iEndPos; i >= mid; --i) { drawTile(i, i - offset, gl); } if (mLastOffset != (int) offset) { mListener.tileOnTop(this, getActuallyPosition((int) offset)); mLastOffset = (int) offset; } gl.glPopMatrix(); } private void drawTile(int position, float off, GL10 gl) { final CoverFlowRecord fcr = getTileAtIndex(position, gl); if (fcr != null && fcr.mTexture != 0) { if (mMatrix == null) { mMatrix = new float[16]; mMatrix[15] = 1; mMatrix[10] = 1; mMatrix[5] = 1; mMatrix[0] = 1; } float trans = off * SPREAD_IMAGE; float f = off * FLANK_SPREAD; if (f > FLANK_SPREAD) f = FLANK_SPREAD; else if (f < -FLANK_SPREAD) f = -FLANK_SPREAD; mMatrix[3] = -f; mMatrix[0] = 1 - Math.abs(f); float sc = 0.38f * mMatrix[0]; trans += f * 1; gl.glPushMatrix(); gl.glBindTexture(GL10.GL_TEXTURE_2D, fcr.mTexture); // draw bitmap gl.glTranslatef(trans, 0, 0); gl.glScalef(sc, sc, 1.0f); gl.glMultMatrixf(mMatrix, 0); gl.glDrawArrays(GL10.GL_TRIANGLE_STRIP, 0, 4); // draw the reflection gl.glTranslatef(0, -2, 0); gl.glScalef(1, -1, 1); gl.glColor4f(1f, 1f, 1f, 0.5f); gl.glDrawArrays(GL10.GL_TRIANGLE_STRIP, 0, 4); gl.glColor4f(1, 1, 1, 1); gl.glPopMatrix(); } } private CoverFlowRecord getTileAtIndex(int position, GL10 gl) { synchronized (this) { position = getActuallyPosition(position); CoverFlowRecord fcr = mCache.objectForKey(position); if (fcr == null) { Bitmap bm = mListener.getImage(this, position); if (bm == null) return null; int texture = imageToTexture(bm, gl); fcr = new CoverFlowRecord(texture, gl); mCache.putObjectForKey(position, fcr); } return fcr; } } private static Bitmap createTextureBitmap(Bitmap bitmap) { int width = bitmap.getWidth(); int height = bitmap.getHeight(); final Bitmap bm = Bitmap.createBitmap(IMAGE_SIZE, IMAGE_SIZE, Bitmap.Config.ARGB_8888); Canvas cv = new Canvas(bm); if (width > IMAGE_SIZE || height > IMAGE_SIZE) { // scale the bitmap, make the width or height to the IMAGE_SIZE Rect src = new Rect(0, 0, width, height); float scale = 1.0f; if (width > height) scale = ((float) IMAGE_SIZE) / width; else scale = ((float) IMAGE_SIZE) / height; width = (int) (width * scale); height = (int) (height * scale); float left = (IMAGE_SIZE - width) / 2.0f; float top = (IMAGE_SIZE - height) / 2.0f; RectF dst = new RectF(left, top, left + width, top + height); cv.drawBitmap(bitmap, src, dst, new Paint()); } else { float left = (IMAGE_SIZE - width) / 2.0f; float top = (IMAGE_SIZE - height) / 2.0f; cv.drawBitmap(bitmap, left, top, new Paint()); } return bm; } private int imageToTexture(Bitmap bitmap, GL10 gl) { // generate texture int[] texture = new int[1]; gl.glGenTextures(1, texture, 0); gl.glBindTexture(GL10.GL_TEXTURE_2D, texture[0]); final Bitmap bm = createTextureBitmap(bitmap); bitmap.recycle(); GLUtils.texImage2D(GL10.GL_TEXTURE_2D, 0, bm, 0); // draw the bitmap in // the texture bm.recycle(); // some texture settings gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_MIN_FILTER, GL10.GL_NEAREST); gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_MAG_FILTER, GL10.GL_LINEAR); gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_WRAP_S, GL10.GL_CLAMP_TO_EDGE); gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_WRAP_T, GL10.GL_CLAMP_TO_EDGE); gl.glTexEnvf(GL10.GL_TEXTURE_ENV, GL10.GL_TEXTURE_ENV_MODE, GL10.GL_MODULATE); return texture[0]; } private static FloatBuffer makeFloatBuffer(final float[] arr) { ByteBuffer bb = ByteBuffer.allocateDirect(arr.length * 4); bb.order(ByteOrder.nativeOrder()); FloatBuffer fb = bb.asFloatBuffer(); fb.put(arr); fb.position(0); return fb; } public static class CoverFlowRecord { private int mTexture; private GL10 gl; public CoverFlowRecord(int texture, GL10 gl) { mTexture = texture; this.gl = gl; } @Override protected void finalize() throws Throwable { if (mTexture != 0) { gl.glDeleteTextures(1, new int[] { mTexture }, 0); } super.finalize(); } } public static interface CoverFlowListener { public int getCount(CoverFlowOpenGL view); public Bitmap getImage(CoverFlowOpenGL anotherCoverFlow, int position); public void tileOnTop(CoverFlowOpenGL view, int position); public void topTileClicked(CoverFlowOpenGL view, int position); } }
public class DataCache<K, E> { private int mCapacity; private LinkedHashMap<K, E> mCache; private final ReadWriteLock mReadWriteLock = new ReentrantReadWriteLock(); public DataCache(int capacity) { mCapacity = capacity; mCache = new LinkedHashMap<K, E>(mCapacity) { private static final long serialVersionUID = -9165777183357349715L; @Override protected boolean removeEldestEntry(Entry<K, E> eldest) { if (size() > mCapacity) { mReadWriteLock.writeLock().lock(); remove(eldest.getKey()); mReadWriteLock.writeLock().unlock(); } return false; } }; } public E objectForKey(K key) { mReadWriteLock.readLock().lock(); final E result = mCache.get(key); mReadWriteLock.readLock().unlock(); return result; } public void putObjectForKey(final K key, final E value) { if (key != null && value != null) { mReadWriteLock.writeLock().lock(); mCache.put(key, value); mReadWriteLock.writeLock().unlock(); } } public boolean containsKey(final K key) { mReadWriteLock.readLock().lock(); final boolean result = mCache.containsKey(key); mReadWriteLock.readLock().unlock(); return result; } public void clear() { mReadWriteLock.writeLock().lock(); mCache.clear(); mReadWriteLock.writeLock().unlock(); } public void setCapacity(int capacity) { mCapacity = capacity; } }
使用时
private static int[] SAMPLE_IMAGES = new int[] { R.drawable.gallery_photo_1, R.drawable.gallery_photo_2, R.drawable.gallery_photo_3, R.drawable.gallery_photo_4, R.drawable.gallery_photo_5, R.drawable.gallery_photo_6, R.drawable.gallery_photo_7, R.drawable.gallery_photo_8 }; mCoverFlow = new CoverFlowOpenGL(this); mCoverFlow.setCoverFlowListener(new CoverFlowOpenGL.CoverFlowListener() { @Override public int getCount(CoverFlowOpenGL view) { return SAMPLE_IMAGES_2.length; } @Override public View getView(CoverFlowOpenGL anotherCoverFlow, int position) { return BitmapFactory.decodeResource(getResources(), SAMPLE_IMAGES_2[position]); } @Override public void tileOnTop(CoverFlowOpenGL view, int position) { // you can control what will happen when one image is in // middle } @Override public void topTileClicked(CoverFlowOpenGL view, int position) { // you can control what will happen when the image in // middle is clicked } });
发表评论
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获取Android Device的信息
2013-12-26 15:47 1444String phoneInfo = "PROD ... -
看雪学院-Android安全
2013-11-25 09:40 943http://bbs.pediy.com/forumdispl ... -
Toast原来也可以多样化
2013-09-18 13:48 1165Style 1: 默认 Toast def = Toast ... -
Google Map API V2
2013-05-13 13:37 2157以后如果要开发包含google map的程序就更麻烦咯 htt ... -
如何集成支付宝官方文档
2013-02-08 11:24 4478官方文档下载地址 https://b.alipay.com/o ... -
[转帖]裁剪图片
2013-01-30 17:22 930原帖:http://www.linuxidc.com/Linu ... -
MonkeyRunner的使用
2013-01-29 13:06 9654要使用MonkeyRunner,就要 ... -
重复执行某段代码
2012-12-29 14:36 1562用handler就可以了 private Handler ... -
选择音频的输出方式
2012-12-12 15:00 1947可以选择用耳机还是扬声器播放(蓝牙的就留到下次吧),要求SDK ... -
使FrameLayout的Gravity等于Center
2012-12-06 16:42 1706由于无法设置FrameLayout的Gravity,所以只能通 ... -
在Android上模拟MetroUI
2012-10-31 15:49 2586在Android上模拟WP7的MetroUI MetroIt ... -
Uri.Builder与String互转
2012-08-14 15:56 2289Uri.Builder -> String Uri. ... -
判断屏幕尺寸
2012-07-17 10:21 1849// support from API 4 final ... -
自己封装的支持自动对焦的CameraView
2012-07-12 13:52 3596import java.io.BufferedOutp ... -
ADT 离线包下载地址
2012-07-06 14:32 1990更新ADT真是件苦恼的事啊 20.0.0的下载地址 http ... -
通过Wifi实现设备间的通信
2012-06-05 15:19 1996服务器端,建立监听(方法更新,可以同时连接多个Client) ... -
IP地址的获取及解析
2012-06-05 13:31 1246获取IP地址 WifiManager wifiManage ... -
判断网络是否有效
2012-05-28 17:32 943protected boolean isInternetA ... -
悬浮窗
2012-05-28 17:21 3039类似于360监视网络速度的那个悬浮窗 public cl ... -
自定义全屏Dialog
2012-04-20 13:16 4005关键在于设置Style <style nam ...
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