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zhangchunlin
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142 changes: 142 additions & 0 deletions
142
ui/src/main/java/top/andnux/ui/UIActivityIndicatorView.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,142 @@ | ||
| package top.andnux.ui; | ||
|
|
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| import android.content.Context; | ||
| import android.content.res.TypedArray; | ||
| import android.graphics.Canvas; | ||
| import android.graphics.Color; | ||
| import android.graphics.Paint; | ||
| import android.os.Handler; | ||
| import android.os.Message; | ||
| import android.util.AttributeSet; | ||
| import android.view.View; | ||
|
|
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| import java.lang.ref.WeakReference; | ||
|
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| public class UIActivityIndicatorView extends View { | ||
|
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| private int startColor = Color.argb(255, 255, 255, 255); | ||
| private float strokeWidth = 0; | ||
| private int startAngle = 0; | ||
|
|
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| private final int mLineCount = 12; | ||
| private final int mMinAlpha = 0; | ||
| private final int mAngleGradient = 360 / mLineCount; | ||
| private Paint paint; | ||
| private int[] colors = new int[mLineCount]; | ||
|
|
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| public UIActivityIndicatorView(Context context) { | ||
| this(context, null); | ||
| } | ||
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| public UIActivityIndicatorView(Context context, AttributeSet attrs) { | ||
| super(context, attrs); | ||
| TypedArray typedArray = context.obtainStyledAttributes(attrs, R.styleable.UIActivityIndicatorView); | ||
| for (int i = 0; i < typedArray.getIndexCount(); i++) { | ||
| int i1 = typedArray.getIndex(i); | ||
| if (i1 == R.styleable.UIActivityIndicatorView_AIV_startColor) { | ||
| startColor = typedArray.getColor(R.styleable.UIActivityIndicatorView_AIV_startColor, startColor); | ||
|
|
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| } else if (i1 == R.styleable.UIActivityIndicatorView_AIV_startAngle) { | ||
| startAngle = typedArray.getInt(R.styleable.UIActivityIndicatorView_AIV_startAngle, startAngle); | ||
|
|
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| } else if (i1 == R.styleable.UIActivityIndicatorView_AIV_strokeWidth) { | ||
| strokeWidth = typedArray.getDimension(R.styleable.UIActivityIndicatorView_AIV_strokeWidth, strokeWidth); | ||
|
|
||
| } | ||
| } | ||
| typedArray.recycle(); | ||
| initialize(); | ||
| } | ||
|
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| private void initialize() { | ||
| paint = new Paint(Paint.ANTI_ALIAS_FLAG); | ||
| int alpha = Color.alpha(startColor); | ||
| int red = Color.red(startColor); | ||
| int green = Color.green(startColor); | ||
| int blue = Color.blue(startColor); | ||
| int alpha_gradient = Math.abs(alpha - mMinAlpha) / mLineCount; | ||
| for (int i = 0; i < colors.length; i++) { | ||
| colors[i] = Color.argb(alpha - alpha_gradient * i, red, green, blue); | ||
| } | ||
| paint.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 (strokeWidth == 0) strokeWidth = pointX(mAngleGradient / 2, radius / 2) / 2; | ||
| paint.setStrokeWidth(strokeWidth); | ||
| for (int i = 0; i < colors.length; i++) { | ||
| paint.setColor(colors[i]); | ||
| canvas.drawLine( | ||
| centerX + pointX(-mAngleGradient * i + startAngle, radius / 2), | ||
| centerY + pointY(-mAngleGradient * i + startAngle, radius / 2), | ||
| centerX + pointX(-mAngleGradient * i + startAngle, radius - strokeWidth / 2), // 这里计算Y值时, 之所以减去线宽/2, 是防止没有设置的Padding时,图像会超出View范围 | ||
| centerY + pointY(-mAngleGradient * i + startAngle, radius - strokeWidth / 2), // 这里计算Y值时, 之所以减去线宽/2, 是防止没有设置的Padding时,图像会超出View范围 | ||
| paint); | ||
| } | ||
| } | ||
|
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| private float pointX(int angle, float radius) { | ||
| return (float) (radius * Math.cos(angle * Math.PI / 180)); | ||
| } | ||
|
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| private float pointY(int angle, float radius) { | ||
| return (float) (radius * Math.sin(angle * Math.PI / 180)); | ||
| } | ||
|
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| private Handler animHandler = new MyHandler(this); | ||
|
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| static class MyHandler extends Handler { | ||
|
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| private WeakReference<UIActivityIndicatorView> mReference; | ||
|
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| MyHandler(UIActivityIndicatorView reference) { | ||
| mReference = new WeakReference<>(reference); | ||
| } | ||
|
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| @Override | ||
| public void handleMessage(Message msg) { | ||
| super.handleMessage(msg); | ||
| UIActivityIndicatorView view = mReference.get(); | ||
| if (view == null) { | ||
| return; | ||
| } | ||
| view.startAngle += view.mAngleGradient; | ||
| view.invalidate(); | ||
| view.animHandler.sendEmptyMessageDelayed(0x00, 50); | ||
| } | ||
| } | ||
|
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| public void start() { | ||
| if (animHandler == null){ | ||
| animHandler = new MyHandler(this); | ||
| } | ||
| animHandler.sendEmptyMessage(0x00); | ||
| } | ||
|
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| public void stop() { | ||
| if (animHandler != null) { | ||
| animHandler.removeMessages(0x00); | ||
| animHandler = null; | ||
| } | ||
| } | ||
|
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| public void setStartColor(int startColor) { | ||
| this.startColor = startColor; | ||
| invalidate(); | ||
| } | ||
|
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| public void setStrokeWidth(float strokeWidth) { | ||
| this.strokeWidth = strokeWidth; | ||
| invalidate(); | ||
| } | ||
|
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| public void setStartAngle(int startAngle) { | ||
| this.startAngle = startAngle; | ||
| invalidate(); | ||
| } | ||
| } |
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