1ヶ月でAndroidカメラアプリ開発(3/4)

by sakebook

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̍ϲ݄Ͱ ANDROIDΧϝϥΞϓϦ։ൃ @Trunk ञຊ৳໵ 2016/3/27

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ຊ೔ͷྲྀΕ • ՝୊ͷ֬ೝ • Intent • Χϝϥݺͼग़͠ • ը૾ड͚औΓ • ΪϟϥϦʔݺͼग़͠ • ΤσΟλʔىಈ • ը૾γΣΞ • (҉໧తIntentͷ৚݅ઃఆ)

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՝୊ͷ֬ೝ

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՝୊ • ࣗ෼͕࡞Γ͍ͨΞϓϦͷϨΠΞ΢τΛߟ͑ ࣮૷ͯ͠ΈΔ • ࣗ෼͕࡞Γ͍ͨΞϓϦͷ͍͔ͭ͘ͷwidgetͰ ΠϕϯτϋϯυϦϯάΛઃఆ͢Δ

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INTENT

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INTENT • Activity(Component)ಉ࢜ͷ΍ΓͱΓʹ༻͍Δ • ผͷΞϓϦؒͰ΋΍ΓͱΓՄೳ • ༷ʑͳ৘ใΛ٧ΊΒΕΔ(੍ݶ͋Γ)

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2छྨ͋Δ • ໌ࣔతIntent • ݺͼग़͍ͨ͠૬खΛComponent໊Ͱࢦఆ • ҉໧తIntent • ݺͼग़͍ͨ͠૬खΛػೳ͔Βࢦఆ

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(౜ಥ)ֶߍʹྫ͑Δͱ • ໌ࣔతIntent • ʮࠤ౻͞Μͪΐͬͱདྷͯʯ • ର৅͸Ұਓ • ҉໧తIntent • ʮॏ͍෺ӡ΂Δਓͪΐͬͱདྷͯʯ • ୭͕དྷΔ͔Θ͔Βͳ͍ • ෳ਺ਓདྷΔ৔߹΋͋Δ

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Χϝϥݺͼग़͠

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ͦͷ·͑ʹ • ΧϝϥONʹ͠ͳ͍ͱμϝ • ࣮ػͰ͸ͳ͍ͷͰ͓๨Εͳ͘

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҉໧తINTENT • ʮΧϝϥ࣋ͬͯΔΞϓϦདྷͯʯ

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ʮΧϝϥ࣋ͬͯΔΞϓϦདྷͯʯ • startActivityForResult • onActivityResultͰ  ݁ՌΛड͚औΕΔݺͼग़͠ํ

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• resultCode • Intent͕ظ଴௨Γऴ͔ྃͨ͠Ͳ͏͔

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• requestCode • IntentΛૹͬͨૹ৴ݩΛ൑ผ͢Δ਺ࣈ

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• data • IntentઌͰͷ݁Ռ͕٧ΊΒΕ͍ͯΔ (Nullable)

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ը૾ड͚औΓ

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BITMAP͸େ͖͍ • Bitmap͸ը૾ͳͷͰ༰ྔ͕େ͖͍ • Intentʹ٧ΊΔʹ͸͍ۤ͠ • URIͰ΍ΓͱΓ͢Δ • https://ja.wikipedia.org/wiki/ Uniform_Resource_Identiﬁer

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ʮΧϝϥ࣋ͬͯΔΞϓϦདྷͯʯ • ʮͨͩ݁͠Ռ͸ﬁleUriʹೖΕ͍ͯͩ͘͞ʯ • Util.getOutputMediaFileUriͰ  ݁ՌͷUriΛ࡞੒

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URIΛੜ੒ • GoogleͷνϡʔτϦΞϧ͔Βഈआ • https://developer.android.com/intl/ja/guide/ topics/media/camera.html#saving-media • આ໌΋ׂѪ

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• ﬁleUriʹͲΜͳ஋͕ೖ͍ͬͯΔͷ͔֬ೝͯ͠ ΈΑ͏ • ઌ΄ͲͱҟͳΓdata͸nullͳͷͰ஫ҙɻ

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ΪϟϥϦʔݺͼग़͠

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҉໧తINTENT • ʮը૾Ұཡ͕ݟ͍ͨʯ

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ʮը૾Ұཡ͕ݟ͍ͨʯ • ݟ্ͨʹҰͭબ୒͍ͨ͠

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• data.getData()Ͱ  ΪϟϥϦʔ͔Βબ୒ͨ͠ը૾ͷUriΛऔಘ • ΧϝϥɾΪϟϥϦʔͲͪΒʹ͓͍ͯ΋ΤσΟ λʔىಈͷͨΊʹUriΛ౉͢

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ΤσΟλʔىಈ

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໌ࣔతINTENT • SDKͷComponentΛࢦఆ • ʮAviaryͷΤσΟλʔདྷͯʯ

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ʮAVIARYͷΤσΟλʔདྷͯʯ • AdobeImageIntent • SDKͷΫϥε • Ճ޻͍ͨ͠ը૾ͷUriΛ౉͢

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தΛݟΔͱ • AdobeImageIntent.class • AdobeImageEditorActivity.class • ಛఆͷCompomentΛࢦఆ͍ͯ͠Δɻ

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• data.getData()ͰՃ޻ͨ͠ը૾ͷUriΛऔಘ • औಘͨ͠Uri͔ΒImageViewʹը૾Ληοτ

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ը૾γΣΞ

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҉໧తINTENT • ʮը૾ૹΓ͍ͨΜ͚ͩͲ୭͔ʯ

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ʮը૾ૹΓ͍ͨΜ͚ͩͲ୭͔ʯ • setAction • ૹΓ͍ͨ • putExtra • ౉͢σʔλ • setType • σʔλͷϑΥʔϚοτ

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͜ΕͰ΋ಉ͡ • Χϝϥݺͼग़͠ʹࣅͯΔ

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ڪΒͨ͘͘͞Μ൓Ԡ͢Δ • Twitter, Facebook, Instagram, LINE… • ͦͷબ୒ࢶ͕ԿΛҙຯ͢Δͷ͔  λΠτϧΛ͚ͭͯϢʔβʹ෼͔Γ΍͘͢͢Δ

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No content

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• Intent.createChooserͰλΠτϧΛ͚ͭΒΕΔ • จࣈྻ͸xmlͰఆٛͯ͠ಈతʹऔಘ͢Δɻ • res/values/strings.xml • جຊతʹϕλॻ͖͸͠ͳ͍

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҉໧తINTENTͷ৚݅ઃఆ

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Ͳ͏ͯ͠൴Β͸൓Ԡ͢Δͷ͔ • ࣗ෼ͨͪͰ΋࡞ΕΔͷ͔ʁ  ࡞Εͳ͍͸͕ͣͳ͍ɻ • ͔͜͠͠ͷΧϝϥΞϓϦ͸  Կʹ΋൓Ԡ͠ͳ͍ • ҧ͍͸ʁ

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൓ԠͰ͖Δ͜ͱΛهड़ • AndroidManifest.xmlʹ  ͲͷComponent͕  ͳʹʹ൓Ԡ͢Δͷ͔ఆٛ͢Δɻ

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҉໧తINTENTͷ৚݅ઃఆ • ৚݅ઃఆ • Action • Category • Data

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ACTION • ͲΜͳ͜ͱΛ͍ͤͨ͞ͷ͔ • Intent.ACTION_VIEW • ݟΔ • Intent.ACTION_SEND • ౉͢

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CATEGORY • ͲΜͳΧςΰϦͷίϯϙʔωϯτʹ  Ԡ౴ͯ͠΋Β͏͔ • Intent.CATEGORY_DEFAULT • ҉໧తIntentʹରԠ͍ͯ͠Δ • Intent.CATEGORY_LAUNCHER • ϥϯνϟʔʹද͍ࣔͯ͠Δ

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DATA • ίϯϙʔωϯτʹ౉͍ͨ͠Data • putExtra(String extra, Bundle data); • Intent.EXTRA_TEXT • ACTION_SENDͰ౉͍ͨ͠Data(จࣈྻ) • Intent.EXTRA_STREAM • ACTION_SENDͰ౉͍ͨ͠Data(ϑΝΠϧύε)

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DATA • setType(String mimeType) • ࣮ϑΝΠϧ͸౉ͤͳ͍ͷͰڭ͑Δඞཁ͕͋Δ • text/plain • ςΩετ • image/jpeg • ը૾

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ࢁ΄Ͳ͋Δ • https://developer.android.com/intl/ja/reference/ android/content/Intent.html

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ઃఆྫ(ࣄྫͱͯ͠঺հ) • trunk://~ or http://~ ͷURLʹରͯ͠ɺ  WebIntentActivityͱ͍͏  Component͕൓Ԡ͢Δ • ࣮ࡍ͸ड͚औͬͨޙͷॲཧ΋ඞཁ