1、切圖會增加體積，但相對簡單，不過在換膚的場景下，會使用不同顏色，需要準備多張圖，不夠靈活。

2、由于自定義的好處，不同顏色只需要提供自定義屬性，換膚時切換屬性設置即可，比較靈活。

3、gif圖普遍比較大，而且加載gif沒有原生支持，需要引入第三方庫，而且消耗內存比較大，不推薦。

自定義屬性：

<?xml version='1.0' encoding='utf-8'?><resources> <declare-styleable name='ActivityIndicatorView'><!-- 菊花顏色 --><attr name='aiv_color' format='color' /><!-- 開始角度 --><attr name='aiv_startAngle' format='integer' /><!-- 線條寬度 --><attr name='aiv_strokeWidth' format='dimension' /><!-- 是否自動開始 --><attr name='aiv_auto_start' format='boolean' /> </declare-styleable></resources>

Java代碼實現過程：

public class ActivityIndicatorView extends View { /** * 菊花顏色 */ private int mColor = Color.argb(255, 255, 255, 255); /** * 開始角度 */ private int mStartAngle = 0; /** * 每條線的寬度 */ private float mStrokeWidth = 0; /** * 是否自動開始旋轉 */ private boolean isAutoStart; /** * 一共多少條先 */ private final int mLineCount = 12; private final int minAlpha = 0; /** * 每一條線疊加的 */ private final int mAngleGradient = 360 / mLineCount; /** * 每條線的顏色 */ private int[] mColors = new int[mLineCount]; /** * 畫筆 */ private Paint mPaint; /** * 動畫Handler */ private Handler mAnimHandler = new Handler(Looper.getMainLooper()); /** * 動畫任務 */ private Runnable mAnimRunnable = new Runnable() {@Overridepublic void run() { mStartAngle += mAngleGradient; invalidate(); mAnimHandler.postDelayed(mAnimRunnable, 50);} }; public ActivityIndicatorView(Context context) {this(context, null); } public ActivityIndicatorView(Context context, AttributeSet attrs) {this(context, attrs, 0); } public ActivityIndicatorView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {super(context, attrs, defStyleAttr);setup(context, attrs, defStyleAttr, 0); } private void setup(Context context, @Nullable AttributeSet attrs, int defStyleAttr, int defStyleRes) {TypedArray typedArray = context.obtainStyledAttributes(attrs, R.styleable.ActivityIndicatorView, defStyleAttr, defStyleRes);mColor = typedArray.getColor(R.styleable.ActivityIndicatorView_aiv_color, mColor);mStartAngle = typedArray.getInt(R.styleable.ActivityIndicatorView_aiv_startAngle, mStartAngle);mStrokeWidth = typedArray.getDimension(R.styleable.ActivityIndicatorView_aiv_strokeWidth, mStrokeWidth);isAutoStart = typedArray.getBoolean(R.styleable.ActivityIndicatorView_aiv_auto_start, true);typedArray.recycle();initialize(); } private void initialize() {mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);int alpha = Color.alpha(mColor);int red = Color.red(mColor);int green = Color.green(mColor);int blue = Color.blue(mColor);int alphaGradient = Math.abs(alpha - minAlpha) / mLineCount;for (int i = 0; i < mColors.length; i++) { mColors[i] = Color.argb(alpha - alphaGradient * i, red, green, blue);}mPaint.setStrokeCap(Paint.Cap.ROUND); } @Override protected void onDraw(Canvas canvas) {super.onDraw(canvas);int centerX = getWidth() / 2;int centerY = getHeight() / 2;float radius = Math.min(getWidth() - getPaddingLeft() - getPaddingRight(), getHeight() - getPaddingTop() - getPaddingBottom()) * 0.5f;if (mStrokeWidth == 0) { mStrokeWidth = pointX(mAngleGradient / 2, radius / 2) / 2;}mPaint.setStrokeWidth(mStrokeWidth);for (int i = 0; i < mColors.length; i++) { mPaint.setColor(mColors[i]); canvas.drawLine( centerX + pointX(-mAngleGradient * i + mStartAngle, radius / 2), centerY + pointY(-mAngleGradient * i + mStartAngle, radius / 2), //這里計算Y值時, 之所以減去線寬/2, 是防止沒有設置的Padding時,圖像會超出View范圍 centerX + pointX(-mAngleGradient * i + mStartAngle, radius - mStrokeWidth / 2), //這里計算Y值時, 之所以減去線寬/2, 是防止沒有設置的Padding時,圖像會超出View范圍 centerY + pointY(-mAngleGradient * i + mStartAngle, radius - mStrokeWidth / 2), mPaint);} } private float pointX(int angle, float radius) {return (float) (radius * Math.cos(angle * Math.PI / 180)); } private float pointY(int angle, float radius) {return (float) (radius * Math.sin(angle * Math.PI / 180)); } @Override protected void onAttachedToWindow() {super.onAttachedToWindow();if (isAutoStart) { start();} } @Override protected void onDetachedFromWindow() {super.onDetachedFromWindow();if (mAnimHandler != null) { stop();} } /** * 開始動畫 */ public void start() {mAnimHandler.post(mAnimRunnable); } /** * 停止動畫 */ public void stop() {mAnimHandler.removeCallbacks(mAnimRunnable); } /** * 設置菊花顏色 */ public void setColor(int color) {this.mColor = color; } /** * 設置線寬 */ public void setStrokeWidth(float strokeWidth) {this.mStrokeWidth = strokeWidth; } /** * 設置開始的角度 */ public void setStartAngle(int startAngle) {this.mStartAngle = startAngle; }}布局代碼

布局中添加控件，適當時候顯示、隱藏即可，最好都設置寬、高、顏色以及線寬，默認效果比較不符合使用。

<?xml version='1.0' encoding='utf-8'?><RelativeLayout xmlns:android='http://schemas.android.com/apk/res/android' android:layout_width='match_parent' android:layout_height='match_parent'> <com.tongwei.bootrunsample.base.widget.ActivityIndicatorViewandroid: android:layout_width='25dp'android:layout_height='25dp'android:layout_gravity='center'android:layout_centerInParent='true'app:aiv_color='#A2A3B0'app:aiv_strokeWidth='2.5dp' /></RelativeLayout>

到這里就結束了.

以上就是Android實現仿iOS菊花加載圈動畫效果的詳細內容，更多關于Android仿iOS菊花加載圈動畫的資料請關注好吧啦網其它相關文章！