本文实例为大家分享了Android实现仿网易音乐唱片播放效果的具体代码，供大家参考，具体内容如下

效果图：

在values中创建attrs.xml文件

<?xml version="1.0" encoding="utf-8"?><resources> <declare-styleable name="GramophoneView"> <attr name="picture_radiu" format="dimension" /> //中间图片的半径 <attr name="src" format="reference" /> //图片 <attr name="disk_rotate_speed" format="float" /> //唱片旋转的速度 </declare-styleable></resources>

创建GramophoneView

public class GramophoneView extends View { /** * 尺寸计算设计说明： * 1、唱片有两个主要尺寸：中间图片的半径、黑色圆环的宽度。 * 黑色圆环的宽度 = 图片半径的一半。 * 2、唱针分为“手臂”和“头”，手臂分两段，一段长的一段短的，头也是一段长的一段短的。 * 唱针四个部分的尺寸求和 = 唱片中间图片的半径+黑色圆环的宽度 * 唱针各部分长度 比例——长的手臂：短的手臂：长的头：短的头 = 8:4:2:1 * 3、唱片黑色圆环顶部到唱针顶端的距离 = 唱针长的手臂的长。度 */ private final float DEFUALT_DISK_ROTATE_SPEED = 1f; private final float DEFAULT_PICTURE_RADIU = 200; // 中间图片默认半径 private final float DEFUALT_PAUSE_NEEDLE_DEGREE = -45; // 暂停状态时唱针的旋转角度 private final float DEFUALT_PLAYING_NEEDLE_DEGREE = -15; // 播放状态时唱针的旋转角度 private int pictureRadiu; // 中间图片的半径 //指针 private int smallCircleRadiu = 20; // 唱针顶部小圆半径 private int bigCircleRadiu = 30; // 唱针顶部大圆半径 private int shortArmLength; private int longArmleLength; // 唱针手臂，较长那段的长度 private int shortHeadLength; // 唱针的头，较短那段的长度 private int longHeadLength; private Paint needlePaint; //唱片 private float halfMeasureWidth; private int diskRingWidth; // 黑色圆环宽度 private float diskRotateSpeed; // 唱片旋转速度 private Bitmap pictureBitmap; private Paint diskPaint; //状态控制 private boolean isPlaying; private float currentDiskDegree; // 唱片旋转角度 private float currentNeddleDegree = DEFUALT_PLAYING_NEEDLE_DEGREE; // 唱针旋转角度 public GramophoneView(Context context) { this(context, null); } public GramophoneView(Context context, @Nullable AttributeSet attrs) { super(context, attrs); needlePaint = new Paint(Paint.ANTI_ALIAS_FLAG); diskPaint = new Paint(Paint.ANTI_ALIAS_FLAG); TypedArray typedArray = getContext().obtainStyledAttributes(attrs, R.styleable.GramophoneView); //拿到xml中的图片和图片半径和，旋转的度数 pictureRadiu = (int) typedArray.getDimension(R.styleable.GramophoneView_picture_radiu, DEFAULT_PICTURE_RADIU); diskRotateSpeed = typedArray.getFloat(R.styleable.GramophoneView_disk_rotate_speed, DEFUALT_DISK_ROTATE_SPEED); Drawable drawable = typedArray.getDrawable(R.styleable.GramophoneView_src); if (drawable == null) { pictureBitmap = BitmapFactory.decodeResource(getResources(), R.mipmap.ic_launcher); } else { pictureBitmap = ((BitmapDrawable) drawable).getBitmap(); } //初始化唱片的变量 diskRingWidth = pictureRadiu >> 1; shortHeadLength = (pictureRadiu + diskRingWidth) / 15; //图片半径和黑色圆环的和 等于 指针的总长度 longHeadLength = shortHeadLength << 1; //左移相当于乘以2 shortArmLength = longHeadLength << 1; longArmleLength = shortArmLength << 1; } /** * 理想的宽高是，取决于picture的 半径的 * * @param widthMeasureSpec * @param heightMeasureSpec */ @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { super.onMeasure(widthMeasureSpec, heightMeasureSpec); //我们想要的理想宽高 int width = (pictureRadiu + diskRingWidth) * 2; int hight = (pictureRadiu + diskRingWidth) * 2 + longArmleLength; //根据我们理想的宽和高 和xml中设置的宽高，按resolveSize规则做最后的取舍 //resolveSize规则 1、精确模式，按 int measureWidth = resolveSize(width, widthMeasureSpec); int measureHeight = resolveSize(hight, heightMeasureSpec); setMeasuredDimension(measureWidth, measureHeight); } @Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); halfMeasureWidth = getMeasuredWidth() >> 1; drawDisk(canvas); drawNeedle(canvas); if (currentNeddleDegree > DEFUALT_PAUSE_NEEDLE_DEGREE) { invalidate(); } } private void drawDisk(Canvas canvas) { currentDiskDegree = currentDiskDegree % 360 + diskRotateSpeed; canvas.save(); canvas.translate(halfMeasureWidth, longArmleLength + diskRingWidth + pictureRadiu); canvas.rotate(currentDiskDegree); diskPaint.setColor(Color.BLACK); diskPaint.setStyle(Paint.Style.STROKE); diskPaint.setStrokeWidth(pictureRadiu / 2); canvas.drawCircle(0, 0, pictureRadiu + diskRingWidth / 2, diskPaint); Path path = new Path(); // 裁剪的path路径 （为了裁剪成圆形图片，其实是将画布剪裁成了圆形） path.addCircle(0, 0, pictureRadiu, Path.Direction.CW); canvas.clipPath(path); Rect src = new Rect(); //将要画bitmap的那个范围 src.set(0, 0, pictureBitmap.getWidth(), pictureBitmap.getHeight()); Rect dst = new Rect(); dst.set(-pictureRadiu, -pictureRadiu, pictureRadiu, pictureRadiu); //将要将bitmap画要坐标系的那个位置 canvas.drawBitmap(pictureBitmap, src, dst, null); canvas.restore(); } private void drawNeedle(Canvas canvas) { canvas.save(); //移动坐标原点，画指针第一段 canvas.translate(halfMeasureWidth, 0); canvas.rotate(currentNeddleDegree); needlePaint.setColor(Color.parseColor("#C0C0C0")); needlePaint.setStrokeWidth(20); canvas.drawLine(0, 0, 0, longArmleLength, needlePaint); //画指针第二段 canvas.translate(0, longArmleLength); canvas.rotate(-30); canvas.drawLine(0, 0, 0, shortArmLength, needlePaint); //画指针第三段 canvas.translate(0, shortArmLength); needlePaint.setStrokeWidth(30); canvas.drawLine(0, 0, 0, longHeadLength, needlePaint); //画指针的第四段 canvas.translate(0, longHeadLength); needlePaint.setStrokeWidth(45); canvas.drawLine(0, 0, 0, shortHeadLength, needlePaint); canvas.restore(); //画指针的支点 canvas.save(); canvas.translate(halfMeasureWidth, 0); needlePaint.setColor(Color.parseColor("#8A8A8A")); needlePaint.setStyle(Paint.Style.FILL); canvas.drawCircle(0, 0, bigCircleRadiu, needlePaint); needlePaint.setColor(Color.parseColor("#C0C0C0")); canvas.drawCircle(0, 0, smallCircleRadiu, needlePaint); canvas.restore(); //当前如果是播放的话，就移动到播放的位置 ，因为逆时针旋转度数是负的所以，- + 需要注意 if (isPlaying) { if (currentNeddleDegree < DEFUALT_PLAYING_NEEDLE_DEGREE) { //不是暂停状态，就是播放状态，或者是切换中状态 currentNeddleDegree += 3; //切换中状态指针是要有动画效果的，所有要改变指针的度数 } } else { if (currentNeddleDegree > DEFUALT_PAUSE_NEEDLE_DEGREE) { currentNeddleDegree -= 3; } } } public void pauseOrstart() { isPlaying = !isPlaying; invalidate(); } /** * 设置图片半径 * * @param pictureRadius 图片半径 */ public void setPictureRadius(int pictureRadius) { this.pictureRadiu = pictureRadius; } /** * 设置唱片旋转速度 * * @param diskRotateSpeed 旋转速度 */ public void setDiskRotateSpeed(float diskRotateSpeed) { this.diskRotateSpeed = diskRotateSpeed; } /** * 设置图片资源id * * @param resId 图片资源id */ public void setPictureRes(int resId) { pictureBitmap = BitmapFactory.decodeResource(getContext().getResources(), resId); invalidate(); }}

activity_main.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" tools:context="com.example.customrecord.MainActivity"> <com.example.customrecord.GramophoneView android:id="@+id/gramopone" android:layout_width="wrap_content" android:layout_height="wrap_content" app:disk_rotate_speed="1" app:picture_radiu="80dp" app:src="@drawable/land" /> <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginTop="60dp" android:onClick="pauseOrstart" android:text="切换播放状态" /></LinearLayout>

MainActivity

public class MainActivity extends AppCompatActivity { private GramophoneView gramophoneView; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); gramophoneView = (GramophoneView) findViewById(R.id.gramopone); } public void pauseOrstart(View view) { gramophoneView.pauseOrstart(); }}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。