本文实例为大家分享了谷歌风格ProgressBar的具体代码，供大家参考，具体内容如下

具体代码

package zms.demo.colorprogress;import android.content.Context;import android.content.res.Resources;import android.content.res.TypedArray;import android.graphics.Canvas;import android.graphics.drawable.Drawable;import android.util.AttributeSet;import android.view.animation.AccelerateDecelerateInterpolator;import android.view.animation.AccelerateInterpolator;import android.view.animation.DecelerateInterpolator;import android.view.animation.Interpolator;import android.view.animation.LinearInterpolator;import android.widget.ProgressBar;public class GoogleProgressBar extends ProgressBar { private static final int INTERPOLATOR_ACCELERATE = 0; private static final int INTERPOLATOR_LINEAR = 1; private static final int INTERPOLATOR_ACCELERATEDECELERATE = 2; private static final int INTERPOLATOR_DECELERATE = 3; public GoogleProgressBar(Context context) { this(context, null); } public GoogleProgressBar(Context context, AttributeSet attrs) { this(context, attrs, R.attr.googleProgressStyle); } public GoogleProgressBar(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); if (isInEditMode()) { setIndeterminateDrawable(new GoogleProgressDrawable.Builder( context, true).build()); return; } Resources res = context.getResources(); TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.GoogleStyleProgressBar, defStyle, 0); final int color = a.getColor(R.styleable.GoogleStyleProgressBar_color, res.getColor(R.color.default_color)); final int sectionsCount = a.getInteger( R.styleable.GoogleStyleProgressBar_sections_count, res.getInteger(R.integer.default_sections_count)); final int separatorLength = a .getDimensionPixelSize( R.styleable.GoogleStyleProgressBar_stroke_separator_length, res.getDimensionPixelSize(R.dimen.default_stroke_separator_length)); final float strokeWidth = a.getDimension( R.styleable.GoogleStyleProgressBar_stroke_width, res.getDimension(R.dimen.default_stroke_width)); final float speed = a.getFloat( R.styleable.GoogleStyleProgressBar_speed, Float.parseFloat(res.getString(R.string.default_speed))); final float speedProgressiveStart = a.getFloat( R.styleable.GoogleStyleProgressBar_progressiveStart_speed, speed); final float speedProgressiveStop = a .getFloat( R.styleable.GoogleStyleProgressBar_progressiveStop_speed, speed); final int iInterpolator = a.getInteger( R.styleable.GoogleStyleProgressBar_interpolator, -1); final boolean reversed = a.getBoolean( R.styleable.GoogleStyleProgressBar_reversed, res.getBoolean(R.bool.default_reversed)); final boolean mirrorMode = a.getBoolean( R.styleable.GoogleStyleProgressBar_mirror_mode, res.getBoolean(R.bool.default_mirror_mode)); final int colorsId = a.getResourceId( R.styleable.GoogleStyleProgressBar_colors, 0); final boolean progressiveStartActivated = a.getBoolean( R.styleable.GoogleStyleProgressBar_progressiveStart_activated, res.getBoolean(R.bool.default_progressiveStart_activated)); final Drawable backgroundDrawable = a .getDrawable(R.styleable.GoogleStyleProgressBar_background); final boolean generateBackgroundWithColors = a .getBoolean( R.styleable.GoogleStyleProgressBar_generate_background_with_colors, false); final boolean gradients = a.getBoolean( R.styleable.GoogleStyleProgressBar_gradients, false); a.recycle(); // interpolator Interpolator interpolator = null; if (iInterpolator == -1) { interpolator = getInterpolator(); } if (interpolator == null) { switch (iInterpolator) { case INTERPOLATOR_ACCELERATEDECELERATE: interpolator = new AccelerateDecelerateInterpolator(); break; case INTERPOLATOR_DECELERATE: interpolator = new DecelerateInterpolator(); break; case INTERPOLATOR_LINEAR: interpolator = new LinearInterpolator(); break; case INTERPOLATOR_ACCELERATE: default: interpolator = new AccelerateInterpolator(); } } int[] colors = null; // colors if (colorsId != 0) { colors = res.getIntArray(colorsId); } GoogleProgressDrawable.Builder builder = new GoogleProgressDrawable.Builder( context).speed(speed) .progressiveStartSpeed(speedProgressiveStart) .progressiveStopSpeed(speedProgressiveStop) .interpolator(interpolator).sectionsCount(sectionsCount) .separatorLength(separatorLength).strokeWidth(strokeWidth) .reversed(reversed).mirrorMode(mirrorMode) .progressiveStart(progressiveStartActivated) .gradients(gradients); if (backgroundDrawable != null) { builder.backgroundDrawable(backgroundDrawable); } if (generateBackgroundWithColors) { builder.generateBackgroundUsingColors(); } if (colors != null && colors.length > 0) builder.colors(colors); else builder.color(color); GoogleProgressDrawable d = builder.build(); setIndeterminateDrawable(d); } public void applyStyle(int styleResId) { TypedArray a = getContext().obtainStyledAttributes(null, R.styleable.GoogleStyleProgressBar, 0, styleResId); if (a.hasValue(R.styleable.GoogleStyleProgressBar_color)) { setSmoothProgressDrawableColor(a.getColor( R.styleable.GoogleStyleProgressBar_color, 0)); } if (a.hasValue(R.styleable.GoogleStyleProgressBar_colors)) { int colorsId = a.getResourceId( R.styleable.GoogleStyleProgressBar_colors, 0); if (colorsId != 0) { int[] colors = getResources().getIntArray(colorsId); if (colors != null && colors.length > 0) setSmoothProgressDrawableColors(colors); } } if (a.hasValue(R.styleable.GoogleStyleProgressBar_sections_count)) { setSmoothProgressDrawableSectionsCount(a.getInteger( R.styleable.GoogleStyleProgressBar_sections_count, 0)); } if (a.hasValue(R.styleable.GoogleStyleProgressBar_stroke_separator_length)) { setSmoothProgressDrawableSeparatorLength(a.getDimensionPixelSize( R.styleable.GoogleStyleProgressBar_stroke_separator_length, 0)); } if (a.hasValue(R.styleable.GoogleStyleProgressBar_stroke_width)) { setSmoothProgressDrawableStrokeWidth(a.getDimension( R.styleable.GoogleStyleProgressBar_stroke_width, 0)); } if (a.hasValue(R.styleable.GoogleStyleProgressBar_speed)) { setSmoothProgressDrawableSpeed(a.getFloat( R.styleable.GoogleStyleProgressBar_speed, 0)); } if (a.hasValue(R.styleable.GoogleStyleProgressBar_progressiveStart_speed)) { setSmoothProgressDrawableProgressiveStartSpeed(a.getFloat( R.styleable.GoogleStyleProgressBar_progressiveStart_speed, 0)); } if (a.hasValue(R.styleable.GoogleStyleProgressBar_progressiveStop_speed)) { setSmoothProgressDrawableProgressiveStopSpeed(a .getFloat( R.styleable.GoogleStyleProgressBar_progressiveStop_speed, 0)); } if (a.hasValue(R.styleable.GoogleStyleProgressBar_reversed)) { setSmoothProgressDrawableReversed(a.getBoolean( R.styleable.GoogleStyleProgressBar_reversed, false)); } if (a.hasValue(R.styleable.GoogleStyleProgressBar_mirror_mode)) { setSmoothProgressDrawableMirrorMode(a.getBoolean( R.styleable.GoogleStyleProgressBar_mirror_mode, false)); } if (a.hasValue(R.styleable.GoogleStyleProgressBar_progressiveStart_activated)) { setProgressiveStartActivated(a .getBoolean( R.styleable.GoogleStyleProgressBar_progressiveStart_activated, false)); } if (a.hasValue(R.styleable.GoogleStyleProgressBar_progressiveStart_activated)) { setProgressiveStartActivated(a .getBoolean( R.styleable.GoogleStyleProgressBar_progressiveStart_activated, false)); } if (a.hasValue(R.styleable.GoogleStyleProgressBar_gradients)) { setSmoothProgressDrawableUseGradients(a.getBoolean( R.styleable.GoogleStyleProgressBar_gradients, false)); } if (a.hasValue(R.styleable.GoogleStyleProgressBar_generate_background_with_colors)) { if (a.getBoolean( R.styleable.GoogleStyleProgressBar_generate_background_with_colors, false)) { setSmoothProgressDrawableBackgroundDrawable(GoogleProgressBarUtils .generateDrawableWithColors( checkIndeterminateDrawable().getColors(), checkIndeterminateDrawable().getStrokeWidth())); } } if (a.hasValue(R.styleable.GoogleStyleProgressBar_interpolator)) { int iInterpolator = a.getInteger( R.styleable.GoogleStyleProgressBar_interpolator, -1); Interpolator interpolator; switch (iInterpolator) { case INTERPOLATOR_ACCELERATEDECELERATE: interpolator = new AccelerateDecelerateInterpolator(); break; case INTERPOLATOR_DECELERATE: interpolator = new DecelerateInterpolator(); break; case INTERPOLATOR_LINEAR: interpolator = new LinearInterpolator(); break; case INTERPOLATOR_ACCELERATE: interpolator = new AccelerateInterpolator(); break; default: interpolator = null; } if (interpolator != null) { setInterpolator(interpolator); } } a.recycle(); } @Override protected synchronized void onDraw(Canvas canvas) { super.onDraw(canvas); if (isIndeterminate() && getIndeterminateDrawable() instanceof GoogleProgressDrawable && !((GoogleProgressDrawable) getIndeterminateDrawable()) .isRunning()) { getIndeterminateDrawable().draw(canvas); } } private GoogleProgressDrawable checkIndeterminateDrawable() { Drawable ret = getIndeterminateDrawable(); if (ret == null || !(ret instanceof GoogleProgressDrawable)) throw new RuntimeException( "The drawable is not a SmoothProgressDrawable"); return (GoogleProgressDrawable) ret; } @Override public void setInterpolator(Interpolator interpolator) { super.setInterpolator(interpolator); Drawable ret = getIndeterminateDrawable(); if (ret != null && (ret instanceof GoogleProgressDrawable)) ((GoogleProgressDrawable) ret).setInterpolator(interpolator); } public void setSmoothProgressDrawableInterpolator(Interpolator interpolator) { checkIndeterminateDrawable().setInterpolator(interpolator); } public void setSmoothProgressDrawableColors(int[] colors) { checkIndeterminateDrawable().setColors(colors); } public void setSmoothProgressDrawableColor(int color) { checkIndeterminateDrawable().setColor(color); } public void setSmoothProgressDrawableSpeed(float speed) { checkIndeterminateDrawable().setSpeed(speed); } public void setSmoothProgressDrawableProgressiveStartSpeed(float speed) { checkIndeterminateDrawable().setProgressiveStartSpeed(speed); } public void setSmoothProgressDrawableProgressiveStopSpeed(float speed) { checkIndeterminateDrawable().setProgressiveStopSpeed(speed); } public void setSmoothProgressDrawableSectionsCount(int sectionsCount) { checkIndeterminateDrawable().setSectionsCount(sectionsCount); } public void setSmoothProgressDrawableSeparatorLength(int separatorLength) { checkIndeterminateDrawable().setSeparatorLength(separatorLength); } public void setSmoothProgressDrawableStrokeWidth(float strokeWidth) { checkIndeterminateDrawable().setStrokeWidth(strokeWidth); } public void setSmoothProgressDrawableReversed(boolean reversed) { checkIndeterminateDrawable().setReversed(reversed); } public void setSmoothProgressDrawableMirrorMode(boolean mirrorMode) { checkIndeterminateDrawable().setMirrorMode(mirrorMode); } public void setProgressiveStartActivated(boolean progressiveStartActivated) { checkIndeterminateDrawable().setProgressiveStartActivated( progressiveStartActivated); } public void setSmoothProgressDrawableCallbacks( GoogleProgressDrawable.Callbacks listener) { checkIndeterminateDrawable().setCallbacks(listener); } public void setSmoothProgressDrawableBackgroundDrawable(Drawable drawable) { checkIndeterminateDrawable().setBackgroundDrawable(drawable); } public void setSmoothProgressDrawableUseGradients(boolean useGradients) { checkIndeterminateDrawable().setUseGradients(useGradients); } public void progressiveStart() { checkIndeterminateDrawable().progressiveStart(); } public void progressiveStop() { checkIndeterminateDrawable().progressiveStop(); }}

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