這篇文章主要為大家展示了“Android如何實現(xiàn)自定義View圖片按Path運動和旋轉(zhuǎn)效果”,內(nèi)容簡而易懂,條理清晰,希望能夠幫助大家解決疑惑,下面讓小編帶領(lǐng)大家一起研究并學(xué)習(xí)一下“Android如何實現(xiàn)自定義View圖片按Path運動和旋轉(zhuǎn)效果”這篇文章吧。
創(chuàng)新互聯(lián)堅持“要么做到,要么別承諾”的工作理念,服務(wù)領(lǐng)域包括:成都網(wǎng)站建設(shè)、網(wǎng)站制作、企業(yè)官網(wǎng)、英文網(wǎng)站、手機(jī)端網(wǎng)站、網(wǎng)站推廣等服務(wù),滿足客戶于互聯(lián)網(wǎng)時代的赤坎網(wǎng)站設(shè)計、移動媒體設(shè)計的需求,幫助企業(yè)找到有效的互聯(lián)網(wǎng)解決方案。努力成為您成熟可靠的網(wǎng)絡(luò)建設(shè)合作伙伴!
具體內(nèi)容如下
View:
/** * author : stone * email : aa86799@163.com * time : 16/5/29 15 29 */ public class EarthPathView extends View { private Path mPath; private Paint mPaint; private Bitmap mBitmap; private PathMeasure mPathMeasure; private float[] mPoint; private float[] mTan; private float mDdegrees; public EarthPathView(Context context) { this(context, null); } public EarthPathView(Context context, AttributeSet attrs) { this(context, attrs, 0); } public EarthPathView(Context context, AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); mPaint = new Paint(); mPaint.setColor(Color.RED); mPaint.setStyle(Paint.Style.STROKE); mPaint.setStrokeWidth(10); InputStream is = getResources().openRawResource(R.drawable.earth); mBitmap = BitmapFactory.decodeStream(is); } public void setPath(Path path) { mPath = path; mPathMeasure = new PathMeasure(path, false); mPoint = new float[2]; mTan = new float[2]; } @Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); if (mPath == null) { return; } canvas.rotate(mDdegrees+=2, getWidth()/2, getHeight()/2); canvas.drawPath(mPath, mPaint); float degress = (float) Math.toDegrees(Math.atan2(mTan[1], mTan[0])); Matrix matrix = new Matrix(); matrix.postRotate(degress, mBitmap.getWidth() / 2, mBitmap.getHeight() / 2); matrix.postTranslate(mPoint[0] - mBitmap.getWidth() / 2, mPoint[1] - mBitmap.getHeight() / 2); canvas.drawBitmap(mBitmap, matrix, null); } @TargetApi(Build.VERSION_CODES.HONEYCOMB) public void startAnim() { ValueAnimator animator = ValueAnimator.ofFloat(0, mPathMeasure.getLength()); animator.setDuration(2000); animator.setInterpolator(new LinearInterpolator()); //插值器 animator.setRepeatCount(ValueAnimator.INFINITE); animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() { @Override public void onAnimationUpdate(ValueAnimator animation) { float distance = (float) animation.getAnimatedValue(); mPathMeasure.getPosTan(distance, mPoint, mTan); invalidate(); } }); animator.start(); } }
Activity
package com.stone.canvaspath; import android.app.Activity; import android.graphics.Path; import android.os.Bundle; import com.stone.canvaspath.earth.EarthPathView; /** * author : stone * email : aa86799@163.com * time : 16/5/29 15 27 */ public class EarthActivity extends Activity { private EarthPathView mPathView; private Path mPath; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); int w = getResources().getDisplayMetrics().widthPixels; int h = getResources().getDisplayMetrics().heightPixels; mPathView = new EarthPathView(this); setContentView(mPathView); int min = Math.min(w, h); buildPath(w / 2 + 100, h / 2 + 100, min / 4); mPathView.setPath(mPath); mPathView.startAnim(); } private void buildPath(float x, float y, float radius) { mPath = new Path(); mPath.addCircle(x, y, radius, Path.Direction.CW); } }
以上是“Android如何實現(xiàn)自定義View圖片按Path運動和旋轉(zhuǎn)效果”這篇文章的所有內(nèi)容,感謝各位的閱讀!希望分享的內(nèi)容對大家有幫助,更多相關(guān)知識,歡迎關(guān)注創(chuàng)新互聯(lián)行業(yè)資訊頻道!
文章題目:Android如何實現(xiàn)自定義View圖片按Path運動和旋轉(zhuǎn)效果
文章路徑:http://chinadenli.net/article38/ppjcsp.html
成都網(wǎng)站建設(shè)公司_創(chuàng)新互聯(lián),為您提供網(wǎng)站營銷、虛擬主機(jī)、面包屑導(dǎo)航、網(wǎng)站維護(hù)、企業(yè)網(wǎng)站制作、電子商務(wù)
聲明:本網(wǎng)站發(fā)布的內(nèi)容(圖片、視頻和文字)以用戶投稿、用戶轉(zhuǎn)載內(nèi)容為主,如果涉及侵權(quán)請盡快告知,我們將會在第一時間刪除。文章觀點不代表本網(wǎng)站立場,如需處理請聯(lián)系客服。電話:028-86922220;郵箱:631063699@qq.com。內(nèi)容未經(jīng)允許不得轉(zhuǎn)載,或轉(zhuǎn)載時需注明來源: 創(chuàng)新互聯(lián)