ProgressBar进度条.docx

ProgressBar进度条.docx

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ProgressBar进度条

ProgressBar进度条

extendsView

java.lang.Object

↳android.view.View

↳android.widget.ProgressBar

KnownDirectSubclasses

AbsSeekBar,ContentLoadingProgressBar

KnownIndirectSubclasses

AppCompatRatingBar,RatingBar,SeekBar

ClassOverview

Visualindicatorofprogressinsomeoperation.Displaysabartotheuserrepresentinghowfartheoperationhasprogressed;theapplicationcanchangetheamountofprogress（modifyingthelengthofthebar）asitmovesforward.Thereisalsoasecondaryprogressdisplayableonaprogressbarwhichisusefulfordisplayingintermediateprogress,suchasthebufferlevelduringastreamingplaybackprogressbar.

Aprogressbarcanalsobemadeindeterminate.Inindeterminatemode,theprogressbarshowsacyclicanimationwithoutanindicationofprogress.Thismodeisusedbyapplicationswhenthelengthofthetaskisunknown.Theindeterminateprogressbarcanbeeitheraspinningwheelorahorizontalbar.

Thefollowingcodeexampleshowshowaprogressbarcanbeusedfromaworkerthreadtoupdatetheuserinterfacetonotifytheuserofprogress:

publicclassMyActivityextendsActivity{

privatestaticfinalintPROGRESS=0x1;

privateProgressBarmProgress;

privateintmProgressStatus=0;

privateHandlermHandler=newHandler（）;

protectedvoidonCreate（Bundleicicle）{

super.onCreate（icicle）;

setContentView（R.layout.progressbar_activity）;

mProgress=（ProgressBar）findViewById（R.id.progress_bar）;

//Startlengthyoperationinabackgroundthread

newThread（newRunnable（）{

publicvoidrun（）{

while（mProgressStatus<100）{

mProgressStatus=doWork（）;

//Updatetheprogressbar

mHandler.post（newRunnable（）{

publicvoidrun（）{

mProgress.setProgress（mProgressStatus）;

}

}）;

}

}

}）.start（）;

}

}

Toaddaprogressbartoalayoutfile,youcanusetheelement.Bydefault,theprogressbarisaspinningwheel（anindeterminateindicator）.Tochangetoahorizontalprogressbar,applytheWidget.ProgressBar.Horizontalstyle,likeso:

style="@android:

style/Widget.ProgressBar.Horizontal"

.../>

Ifyouwillusetheprogressbartoshowrealprogress,youmustusethehorizontalbar.YoucanthenincrementtheprogresswithincrementProgressBy（）orsetProgress（）.Bydefault,theprogressbarisfullwhenitreaches100.Ifnecessary,youcanadjustthemaximumvalue（thevalueforafullbar）usingtheandroid:

maxattribute.Otherattributesavailablearelistedbelow.

AnothercommonstyletoapplytotheprogressbarisWidget.ProgressBar.Small,whichshowsasmallerversionofthespinningwheel—usefulwhenwaitingforcontenttoload.Forexample,youcaninsertthiskindofprogressbarintoyourdefaultlayoutforaviewthatwillbepopulatedbysomecontentfetchedfromtheInternet—thespinningwheelappearsimmediatelyandwhenyourapplicationreceivesthecontent,itreplacestheprogressbarwiththeloadedcontent.Forexample:

android:

orientation="horizontal"

...>

android:

layout_width="wrap_content"

android:

layout_height="wrap_content"

style="@android:

style/Widget.ProgressBar.Small"

android:

layout_marginRight="5dp"/>

android:

layout_width="wrap_content"

android:

layout_height="wrap_content"

android:

text="@string/loading"/>

Otherprogressbarstylesprovidedbythesysteminclude:

Widget.ProgressBar.Horizontal

Widget.ProgressBar.Small

Widget.ProgressBar.Large

Widget.ProgressBar.Inverse

Widget.ProgressBar.Small.Inverse

Widget.ProgressBar.Large.Inverse

The"inverse"stylesprovideaninversecolorschemeforthespinner,whichmaybenecessaryifyourapplicationusesalightcoloredtheme（awhitebackground）.

XMLattributes

SeeProgressBarAttributes,ViewAttributes

Summary

XMLAttributes

AttributeNameRelatedMethodDescription

android:

animationResolutionTimeoutbetweenframesofanimationinmilliseconds

Mustbeanintegervalue,suchas"100".

android:

indeterminateAllowstoenabletheindeterminatemode.

android:

indeterminateBehaviorDefineshowtheindeterminatemodeshouldbehavewhentheprogressreachesmax.

android:

indeterminateDrawableDrawableusedfortheindeterminatemode.

android:

indeterminateDurationDurationoftheindeterminateanimation.

android:

indeterminateOnlyRestrictstoONLYindeterminatemode（state-keepingprogressmodewillnotwork）.

android:

indeterminateTintsetIndeterminateTintList（ColorStateList）Tinttoapplytotheindeterminateprogressindicator.

android:

indeterminateTintModesetIndeterminateTintMode（PorterDuff.Mode）Blendingmodeusedtoapplytheindeterminateprogressindicatortint.

android:

interpolator

android:

maxDefinesthemaximumvaluetheprogresscantake.

android:

maxHeightAnoptionalargumenttosupplyamaximumheightforthisview.

android:

maxWidthAnoptionalargumenttosupplyamaximumwidthforthisview.

android:

minHeight

android:

minWidth

android:

mirrorForRtlDefinesiftheassociateddrawablesneedtobemirroredwheninRTLmode.

android:

progressDefinesthedefaultprogressvalue,between0andmax.

android:

progressBackgroundTintsetProgressBackgroundTintList（ColorStateList）Tinttoapplytotheprogressindicatorbackground.

android:

progressBackgroundTintModesetProgressBackgroundTintMode（PorterDuff.Mode）Blendingmodeusedtoapplytheprogressindicatorbackgroundtint.

android:

progressDrawableDrawableusedfortheprogressmode.

android:

progressTintsetProgressTintList（ColorStateList）Tinttoapplytotheprogressindicator.

android:

progressTintModesetProgressTintMode（PorterDuff.Mode）Blendingmodeusedtoapplytheprogressindicatortint.

android:

secondaryProgressDefinesthesecondaryprogressvalue,between0andmax.

android:

secondaryProgressTintsetSecondaryProgressTintList（ColorStateList）Tinttoapplytothesecondaryprogressindicator.

android:

secondaryProgressTintModesetSecondaryProgressTintMode（PorterDuff.Mode）Blendingmodeusedtoapplythesecondaryprogressindicatortint.

[Expand]

InheritedXMLAttributes

Fromclassandroid.view.View

[Expand]

InheritedConstants

Fromclassandroid.view.View

[Expand]

InheritedFields

Fromclassandroid.view.View

PublicConstructors

ProgressBar（Contextcontext）

Createanewprogressbarwithrange0...100andinitialprogressof0.

ProgressBar（Contextcontext,AttributeSetattrs）

ProgressBar（Contextcontext,AttributeSetattrs,intdefStyleAttr）

ProgressBar（Contextcontext,AttributeSetattrs,intdefStyleAttr,intdefStyleRes）

PublicMethods

voiddrawableHotspotChanged（floatx,floaty）

Thisfunctioniscalledwhenevertheviewhotspotchangesandneedstobepropagatedtodrawablesorchildviewsmanagedbytheview.

CharSequencegetAccessibilityClassName（）

Returntheclassnameofthisobjecttobeusedforaccessibilitypurposes.

DrawablegetIndeterminateDrawable（）

Getthedrawableusedtodrawtheprogressbarinindeterminatemode.

ColorStateListgetIndeterminateTintList（）

PorterDuff.ModegetIndeterminateTintMode（）

Returnstheblendingmodeusedtoapplythetinttotheindeterminatedrawable,ifspecified.

InterpolatorgetInterpolator（）

Getstheaccelerationcurvetypefortheindeterminateanimation.

synchronizedintgetMax（）

Returntheupperlimitofthisprogressbar'srange.

synchronizedintgetProgress（）

Gettheprogressbar'scurrentlevelofprogress.

ColorStateListgetProgressBackgroundTintList（）

Returnsthetintappliedtotheprogressbackground,ifspecified.

PorterDuff.ModegetProgressBackgroundTintMode（）

DrawablegetProgressDrawable（）

Getthedrawableusedtodrawtheprogressbarinprogressmode.

ColorStateListgetProgressTintList（）

Returnsthetintappliedtotheprogressdrawable,ifspecified.

PorterDuff.ModegetProgressTintMode（）

Returnstheblendingmodeusedtoapplythetinttotheprogressdrawable,ifspecified.

synchronizedintgetSecondaryProgress（）

Gettheprogressbar'scurrentlevelofsecondaryprogress.

ColorStateListgetSecondaryProgressTintList（）

Returnsthetintappliedtothesecondaryprogressdrawable,ifspecified.

PorterDuff.ModegetSecondaryProgressTintMode（）

Returnstheblendingmodeusedtoapplythetinttothesecondaryprogressdrawable,ifspecified.

synchronizedfinalvoidincrementProgressBy（intdiff）

Increasetheprogressbar'sprogressbythespecifiedamount.

synchronizedfinalvoidincrementSecondaryProgressBy（intdiff）

Increasetheprogressbar'ssecondaryprogressbythespecifiedamount.

voidinvalidateDrawable（Drawabledr）

InvalidatesthespecifiedDrawable.

synchronizedbooleanisIndeterminate（）

Indicatewhetherthisprogressbarisinindeterminatemode.

voidjumpDrawablesToCurrentState（）

CallDrawable.jumpToCurrentState（）onallDrawableobjectsassociatedwiththisview.

voidonRestoreInstanceState（Parcelablestate）

Hookallowingaviewtore-applyarepresentationofitsinternalstatethathadpreviouslybeengeneratedbyonSaveInstanceState（）.

ParcelableonSaveInstanceState（）

Hookallowingaviewtogeneratearepresentationofitsinternalstatethatcanlaterbeusedtocreateanewinstancewiththatsamestate.

voidpostInvalidate（）

Causeaninvalidatetohappenonasubsequentcyclethroughtheeventloop.

synchronizedvoidsetIndeterminate（booleanindeterminate）

Changetheindeterminatemodeforthisprogressbar.

voidsetIndeterminateDrawable（Drawabled）

Definethedrawableusedtodrawtheprogressbarinindeterminatemode.

voidsetIndeterminateDrawableTiled（Drawabled）

Definethetileabledrawableusedtodrawtheprogressbarinindeterminatemode.

voidsetIndeterminateTintList（ColorStateListtint）

Appliesatinttotheindeterminatedrawable.

voidsetIndeterminateTintMode（PorterDuff.ModetintMode）

Specifiestheblendingmodeu