Android学习笔记(三)——初探Intent

时间:2023-03-26 23:54:26

  //此系列博文是《第一行Android代码》的学习笔记,如有错漏,欢迎指正!

  Intent 是 Android 程序中各组件之间进行交互的一种重要方式,它不仅可以指明当前组件想要执行的动作,还可以在不同组件之间传递数据。Intent 一般可被用于启动活动、启动服务、以及发送广播等场景。Intent的用法大致可以分为两种,显式 Intent和隐式 Intent,我们分别来看一看这两种是如何使用的:

一、显式Intent

  使用intent我们可以在一个活动中启动另一个活动,在这里我们在主活动中定义一个按钮,通过点击它来调用另一个活动。

  1)首先在主活动的布局文件定义一个按钮,并在manifest文件中注册,这里就不详细叙述;

  2)建立另一个活动:
    在res下的layout文件上右键 -> new -> layout resource file,新建一个布局文件,这里我们定义一个文本就行。然后 java右键 -> java class,新建一个活动,重写onCreate方法,最后再在manifest文件中注册:

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DpX+ZCpOxkqT750qy0SUqz9iTW2aCRrIsk3uGexApCVOzMGsKrlKfMlSTTm6jXrEGlM2lJCS1PsxIYsO4/TJgWiAE063BiJX4JICrNc5KvsrNbzSr3psvlctjczWnk0YNkM55D0iyej0nQVBLvcE9imQbQGVSEKlHbuZs4Ps26qNwNTqntKCku0VyrWWcXlYe3RueCq1timkVUGI31dRcwLbAt0KwDiWUpHeC29P56wx+rfsG3tVJduVvFJqLC6Nlr8v56s5auLKLJWne5oVZNtBKK5vQvef9i6zpa9RhR4/b2z6/ejD+EwXz+9pM/pfN7vunx5vtnqUPv9dv7K1d9eKtfvdljs8HcUqrH2/uv4tDcVr96M3lykE8XKjvbYwnKveliMe2VSX5luVxOe2VqDrn0LKa9svdvfXO4WAgfmvbKjDGicm+6WCyGw+GC79/sTZfL5WIxbIqG5d7UbchbfQRR7MIfwmB4Sc3D4FQUzSifi97rb07HVR/e6vffNp824qVUvhkfqQRHtgE+n6XsbI8VclyGDi3HJSqBxENpK/qMeKJCO9z2TbEMwx4r4umV35TQXwDTyDuDYsedEzwbVOp+o6J2pXNBWp1yD1ynWUT1yWYuMknNMhdLsKyKX8HBAM06hFj2G2G6Yy8jpewp11cRleYvvk64bBlrs3T/1VGrtnY7UZJh3LTW3p07kfJkX5teLRTRl6ubn1efNk+5M3FhIvpydSPteX7/eLvZk4uarD50fv/Y/M73J2rcij0DrZQyLKLGbUCz7LFMcNNaDJvMVSiRXmoOvZ+Jyr3pRtG4fg2bxH/gIiV2dvvwOvmgadUnXvKD6LQz2+QMmCheFp9tUj0NtZ0nL7ug3khPbedpUuH7iyJlbSsl76L9lLXHsqPt0HJc2lc2r/uLrOvSNFa8Di1Y3hS5vko+t1FiRTy9immZjssUojM45SdnUzLl1yyvmkp7ks2a5VW7J6RZllSWtw9u5QaRgWYdSKzQG2G0Sabu+FrKYKlThNtqVnB/qlRX7j5O/1JOpClPQ45Ol2RSpufkp1+bf0ybmF+MpMH7RI1tMlg+qdJqlj2WCW5PpqeMMZHoEhN8RNypSHYvoVmynDFuXVKGLDamfIZyy5h4KktGcE/5k9t7MegfgbvDTBXQllghx2XQLNvgDQYgq89m8K49xOswfPC6N6Xuq1JSVXVbzbK/KfbjMoXo8DlBvpDVpCjPD/JXLL1ZNIs3eZpVzpLSLGsqiyGbBbYEmnU4sUxFA1ywgmmk0MVgttYsSaqkfTYh4mkWFyxtysqkWXKCSrsnnd/zDn2B9FLl6yeoWaGxTFg0iwtWMNFl0Sy+m1J9xTNfsWuz+Ge5NmNh+pQNJlE0mjVRPwgNUqUkY4IeEBIr5OgS0qzglJw8AZe4ZpneFCWzpTveLTXL+qbE1yzuoG3nrk0+zZKmO7WzkHbNcrUyAc0KTWWhNgtsCzTrcGIx3b9ZylSgX7PUWcJAbzvWLEVijkGziPh0nzxpGFWzEqxqVyQGmhU8CZYXP9Jh2Jj1b0rwbATa7odmUfHurXE3cToXPs06GzjScelmMK2axTYJLefu45oVUpWF1bPA1kCzDicWRykaUNQnkM26Vlyn25faxpk09Fd3fWzSUFGfyJqlTv9F0ix/4VcwOtNrVkgsE0bN8pdYRdQslkQxlozyKRtZs9TP8kiaFcjERJk0DI0VcoCJThqa4iasWeY3hf+sDEO2kFiThsY3JbZmMb7YFV9BVNIsXphlGWqoZomv1rEPI2yQtlQW1oIH8YBmHU4sgWxa2jp0ryJeqlhnulWyRPEWUWmk3KJoLIHfvKhoXNxsls+rItZm0fm9uCWQ3yQYqllqK/pydaMWs5tL4I2xmGFBB2s2y8tLyW3tmkXl3lROg5V702HTfGpD0JY8R6nNkhfy5jNBoZqlttIZg7lGWx+rPmkFi8BCOwy1B2FU8hf7kLSmwOapocwoYoemwdvfFKXuLbhKljaW5WxY3hR7cZ5p8B33ntPNpKerWUTFO/8sYfBEhWoWM/92Rce2GjMcC8QFmnU4sWR8piUVv6/6BfmOv+BWTT+BtRvkNSDeX2/Wyv2J5gUdRAjlqe1ApOL3H9++iLsLxdIMykoNyooPfKGHr+7qD+JF7RoQSjjtgg7uwg3qRGEwlthqWtBBLLugPJWL36e9Mt/673/9k1dfLYbNzV2K016ZV3G52S95QYfFh+vf5Trrh8GpuLlMLM2grNSg3F7HK2zq7s3/4kVj8U3Ygg5u2ZM6URiMxayaZeow9LjktpYFHaSJsJgd2gZveFO0W00Hrl3QQXt6LQs6mI5LO3j5u3HILcziraZ//vt/Zi3tUQgbU0rf5C/bMa0CHwPrWllwLBAfaNbhxAIAABCP0BsMAYgHNOtwYgEAAABgr4BmHU4sAAAAAOwV0KzDiQUAAACAvQKadTixAAAAALBXQLMOJxYAAAAA9gpo1uHEAgAAAMBeAc06nFgAAAAA2CugWYcTCwAAAAB7BTTrcGIBAAAAYK+AZh1OLAAAAADsFdCsw4kFAAAAgL0CmnU4sQAAAACwV0CzDicWAJlBdNqZtZ4mRaLi3VvrYXC66xEBcBQk8qfn9GujCr4nOyOgWYcTS4Yq1dVz1SH8IcWHqHH17cvhxUqEs0Hj6a3RuaD6pPX05tQT/U0jKnay8rYsYwHwcT7+p0dUmo9LjDGiwuj5Er6VNtCsw4klICrN4Vgf42vzz6/e7EcS6kOfvv+4/XN7bnw7EoyVDUTFu7dG54LoovKQtGPVJ63ff9uJpMfoovLw1rprG4e3bazQDsE+cDZo/P7b/v23bbEQajvyVp4i4q34+8tzRb//tsf/+198k/g9EZueZpUzomDzs3ax9H/+Q+nQG9WkKH6WH0+TIh+Y+robhSX0p0etqlArosLoudbFh0WaQLMOJxaHqDR/SezPhlq1eetI/wI/f/uZjWYlGCsb6hOnTkR02pl4HwAJcjZoZKNZ28aKp1nUdpI1s8Q73JNYCUJtR7aTIPVJ42Hmeyu5Kvlf8TKdSuqI6LQzKIrd5Mk7sWeww7NBg7uU8rMyYN/P7hSh2/lH//SICqN+yf9Kkh8ZIAg063BisRT+YJz+JTTrwGLtP0lp1p7EOhs0kjWVxDvck1gJYtcsLknKWx+iWYNKZ9KSElqeZtUnLVmYmOumW2kWY4zalc6FqllsI/eJ5Yy1/znDtFIFmnU4sRL/UyEqzV+uoVk7iVXuTZfL5bC5m5PPowfJZjyHpFk81ZGgqSTe4Z7ESpYQzbqo3A1OVZsJ06yzi8rDW2NjQq5mWRKc0TVLKRDUaJY1MxcdosJorK8ngWmlBzTrQGLZp9ipUl29XL+/3ry/3qz6BalVae6+Lm8iKoyevdffX2/W/r9AU4eMMad/6Ta5nI8vfd22aqJDYW/e/uMSY6w7vhbhRJT1c9UhEnuGmh9R4/b2z6/ejD+EwXz+9pM/pfN7vunx5vtn+bjE67f3V6768Fa/erPHZoO5pVSPt/dfxXXQbfWrN5MnB/l0obKzPZag3JsuFtNemeRXlsvltFem5pBLz2LaK3sfEs3hYiF8aNorM8aIyr3pYrEYDocLvn+zN10ul4vFsCkalntTtyFv9RFE2Qp/CIPhxSgPg1NReqJ8CnqvvzkdV33kchbmllL55m6kQhbfB+RF5eFN3dkeK+S4DB1ajkuu19GWCok+I56o0A6jjF+pRTO9X/EGLx/C77/tp7fG3aTh61b3flneZe+0zypnRGLPUPML0ax2pXNBRMW7QHmWTbOIROLK0yx/jZcvSnTNuqjcGTSLd5LUfwL2IhAU9aYENOsQYtlvGOGywv+6iErzF2/P7thLVgU74bKlyTBXqivJurrja1mk1u4fqrIbtWprN3QwT0at2npc5eHkQSr/Yzn9apT/t742vVoooi9XNz+vPm2ecmfiwkT05epG2vP8/vF2sycXNVl96Pz+sfmd70/UuBV7BlopZVhEjduAZtljmeCmtRg2matQIr3UHHo/E5V7042icf0aNon/wEVK7Oz24XXyQdOqT7zPFaLTzmzz3z9zP029TynpE4jazpOXJ1BvU6e28zSp8P1FCbC2lfLpq3yORollR9uh5bi0r2xe988E1aUJqXgd2oYtZVzkE8is71e8wfsUwb+b/f0yvsv+c342qEQxS7tmeRVOM+XwQzTLq0B3Nets0LBrlrbOnUlyqXFffxV8UtlESyrL2we3qKcANOtAYlmyWT4N0s0DapNMbp8azZLljPn/Mp3+pT8lJmxJ7coiYaZw4j7kiGiTTMr0nPz0a/OPaRPzi5H3ol/U2CaD5ZMqrWbZY5ng9mR6yhgTiS4xwUfEnYpk9xKaJcsZ49YlZchiY0payJ8l8lP5czq4p/zx7L0Y/FAMlLBorcgeK+S4DJplG7zBVGS/Yf6JoXgdWvBpkNZHTUnBjw1e9rbQ90v7LivhiIp3/nomExbNkjsJjDZEs3iTp1nlLLJmRcpmtR31F97N3j1FO94ohN7PhGxWSkCzDieWdnI9JNHVqonZOo0J6TQrOJ8oTymaslmKVLmj9QZGrdraoFBC46Lf9sgFS5uyMmmWnKDS7knn97xDXyC9VPn6CWpWaCwTFs3ighVMdFk0i++mVF/xzFfs2iz+ga3NxJjsQcmvBPekthP8sDFIlZKMUa0oNFbI0SWkWfo8h9tzspoVzFH5tprfr3iDN2WzQt8v7bu82eRqXPTbHm2aJU13BudkQzXL9dREJw0NtVkkVYN9kNBUFmqz0gOadTixmO7fEcVm1J1l0dlGsyy6I9dmeZ1/RLNcU+yOI10FFIk5Bs0i4tN94pC30KwEq9rVD05oltVUTMaQtGaph2zatJVmWQYg12Z5nX9Es1xT5JN9kY7arFlnA0c6ZO8NjahZbJPQcu68EvhAqvWi0tn+TkPt4IO3McYjrCoLq2elCDTrcGJxlMl1bkVKlXq3X3U2BebStF00zWL+WUgFedLQN6pg4Vdw0tA8IUit2npcGxmCqjv71SeyZqnTf5E0y1/4FYzO9JoVEsuEUbP8JVYRNYslUYwlo04DRdUszadRuGYFC4kiTBqGxgo5wEQnDU1xU8hmqbE2lUbW9yuRwfu7sr1fFs1ytzrR1+sPahZXH+YWZkmj8g5QOS65Ml3WLHktK/3p1dV+sdAFHdwRWurb4mFPZWEt+LSBZh1OLIFqWv6yJ7EUllKnxbNQilQJoyIqCcuhSnWlZKokQ+K3CgbvT6RWzZtbDMhfiGaZc3K6nX116LzmPUptFp3fi1sC+U2CoZqltqIvVzdqMbu5BN4YixkWdLBms7y8lNzWrllU7k3lNFi5Nx02zac2BKXuh2c1otRmyTMvfE4nVLPUVrpPO3MJvD5WfdIylQdZOrRbEZM+vOXsiJIFoYvKg65gKHqHlsErZU9iKSz7+xVv8My9VTB4f6L9/QrRLF1OLuSQtYunU/HOr1/y6XXrrsQIpXsFBuqNsXJllfb3fLvlSeW8WtJ3GlpSWXCsDIBmHU4smaBpBVdtCL7OTUvWHW9JBfOCDl4xliYf5pvvty/ooPSmwDNwUQ9fKn7/8e2LuLtQLM2grNSgrPjAF3r46q7+IF7UrgGhhNMu6OAu3KBOFAZjia2mBR3EsgvKU7n4fdor863//tc/efXVYtjc3KU47ZV5FZeb/ZIXdFh8uP5dLqZ+GJyKm+bERJKyUoNyex2vlam7ixood2MFp4FCF3QIzl6ZYjH7x7ahw9Djktta1kR4kkrI43Vod0TlfQl9v+INXjvvduc3LcuCDqZ3eXOAA/V10yHrv8rmzam5X4CjGJL2BkDppshNLZppFXjlbMiOJR9p+JftuPVn6lmV6udiYF0rC46VBdCsw4m1czTLNCR0e7CcSwMA7CeaZRoSWloT3/Adm2P+wrQ9AZp1OLH2AWW90/WHb12RVytNapAAgJRQ1juNvoCqieCatADkC2jW4cQCAAAAwF4BzRu+8sUAABHYSURBVDqcWAAAAADYK6BZhxMLAAAAAHsFNOtwYgEAAABgr4BmHU4sAAAAAOwV0CwAAAAAgFSAZgEAAAAApAI0CwAAAAAgFaBZAAAAAACpAM0CAAAAAEgFaBYAAAAAQCpAs/YFp1/DN6UDAAAAhwQ0KzuoUl09Vx3dF6ASlebjUvZDOjaICqPnS+gsAACAbIBmZQRRaW5wLMYYtarKZz9VqquX63krr0LQHV+/v968v96sX3xaoz0uatXcnWtdwylKCqLC6Dn1KAAAAACDZmUDUWluFgiiwqivprLiaRa1asmaWbwOnf7l2k3OdcfXq37B69B8XJazlOxx2d8OAAAAICmgWakT+qGeoEM4/ctkNStGh7En5iwnKvHjgmkBAADIgBPuWDs3rUPVrHDHosJobJxM3D5WkvOM8TpMXLMSPy57OAAAACApTsRPuzWtg9SsKGVAwVQWn1YLFio5/cv315tVv+BVMrnFXkSF0fOmFkpb5CT65D18vEPD8ZbmL0orz7dMx+Vv7h/2B47r/fWGT1zyKjFtUHvBHAAAAPBBTuQnOzStw9OsKEkdSypLm2vhAsHtgSuIrGjBVzavV6orqSu5WCpGh0JilIfYzX7gtgIsYzZr6+NijFGrth5XeUOi0vxFPyTL7Z8AAADABzlRnu/KtA5Ps1iEbJalKsukWbJJKE9NOtId++VJEot4HdrJTLMsx8W4ZhnUyhcRjgUAACA1oFnpYrUKW1VWUpoVnHeTZ9Dyq1n242KbbJZtKTLUZgEAAEibk5oEg2algCllYr/BMFnNMgXKu2bZTqBVs7B6FgAAgAxANisLggVAoTcYJjtpKO/28Q7tZDlpaDouZtUsrAUPAAAgG6BZGRGsHLLrSwzNYpJ5EJVG7iaqVFfKHX+uf8TrMORIk9asGMfFzJoFxwIAAJAZ0KzsEKYVUpUlLVIgr4kgbvHjwqE8VdpaFj5YS/XvsTs0Ib5jx9KVZq0Hd0WJ4H2LHzku5XUGxwIAAJAtvtosUaGVPcegWYLEvxIHAAAAAHsIvmwHAAAAACAVoFkAAAAAAKkAzQIAAAAASAVoFgAAAABAKkCzAAAAAABSAZoFAAAAAJAKx6hZAAAAAAAZAM0CAAAAAEgFaBYAAAAAQCpAswAAAAAAUgGaBQAAAACQCtAsAAAAAIBUgGbZcPq1UQXf8QwAAACAOBy7ZlGlunquOqRxKaLSfFzKfkiZQVQYPV/CIwEAAICUOGrNIirNDY7FGKNWNW0FoUp19XI9b20XJV4rfVdUGD3XuoYzAAAAAICPcLyaRVSavxgNg6gw6ieTyqJWzaREiWuWJZaxN+t5AAAAAEBsjlSzQt0ihq+YcPqXSXWVUiyYFgAAAJAGJ9yxdm5aWWpWuGNRYTQ2TiZuHyuZCb5UY8G0AAAAgMQ5ET/t1rQy06wo1UjBVBY3mPfXG/5Y9Qu+rZXqyt0qNhEVRs9ek/fXm7XkMaLJ2i831Kptdh6X5N34eIytzLG8Js9Vh8jpX/IdgjZmr1QDAAAAwLacyE92aFrZaFaUe+u0qazu2MsSKZ3IlVJEpfmLr38uQMbaLF0OiVq1taQ7BufTmKIplrK/068aK9LM910CAAAAYFtOlOe7Mq39yWbZKtbdVJOcDeqOr6UMljptF0ez/BrX7aves61mMUkTLatUIJsFAAAAJMvRaRaz1iGZqrK4YG0m8iSbCU2PxdAsxpjTvxSThnP/BKWllSWWSFOZJBK1WQAAAEDinNQk2HFoFjNnbrQWokwF+jVLnSUMtI2jWVSprl5qXSLtMvRxNMvVwe7Y1BCOBQAAACTMMWazOME6JGMqy5UebzdfNutaqYiXp/niaRbbzEWWtGt3xdAsxku+xrWRJjeGteABAACAVDhezWIB07JOqHn6wm/W8yriW7W1lNAKrlwlireISorl2KYvWzXt/YD2VmGxVJ2CYwEAAADpcdSaxeSiJetaWXLx+6pf4Ka1dmvJla2aEIFVGOQ1IN5fb9YaAdJVx4e2Mqz4wFGq6eFYAAAAQKr4arNEhVb27EqzBAku+76fBPNbAAAAAEiVI/2ynaOiOzbmtwAAAACQHtAsAAAAAIBUgGYBAAAAAKQCNAsAAAAAIBWgWQAAAAAAqQDNAgAAAABIhb3TrP/36RMeeOCBBx6Wx24v1wCA6OyjZu12JAAAsM/gIglAjoBmAQBAnsBFEoAcAc0CAIA8gYskADkCmgUAAHkCF0kAcgQ0CwAA8gQukgDkCGgWAClCdNqZtZ4mRaLi3VvrYXC66xGBmOzPW4mLJAA54tg1iyrV1XPVwXcqfwCixtW3L4cXKxHOBo2nt0bnguqT1tObU8/tbxpRsXPcjqh9K4kKo+fLUSXTtxWaBUCOOGrNIirN03csqlRXL9fz1nZR4rXKnq/NP796sx9JqA99+v7j9s/tufGQE4yVDUTFu7dG54LoovKQZ8eqT1q//7Z3mL+hi8rDW+uuveUfUaxW+q7MbyVRYfRc62b45kKzAMgRx6tZRKX5S2IXR2rVTEqUuGZZYu2Ez99+ZqNZCcbKhvrEqRMRnXYmlbPcOhbnbNBIW7Oo7ZiUKHHNssTSYn8rk72YhALNAiBHHKlmJX5ZdPqXmalPlrGikKX65EuzDokMNOts0Egk87STWFmaFjQLgBxxjJqV+AWRqDTPaoIvy1gR2a1mlXvT5XI5bO7mhPDoQXY1nvRIW7N4XXk2mpVSrMxMC5oFQI44qQXYyTgy0yxLIQU3mPfXG/5Y9Qu+rZXqyt0qNhEVRs9ek/fXm7V0nRVN1v6LL7Vqm53HJXk3Lk/GVuZYXpPnqkPk9C/5DqE2RtS4vf3zqzfjD2Ewn7/95E/p/J5verz5/lkejHj99v7KVR/e6ldv9thsMLeU6vH2/qs4IW6rX72ZPDnIpwuVne2xBOXedLGY9sokv7JcLqe9MjWHXHoW015ZjIGaw8VC+NC0V2aMEZV708ViMRwOF3z/Zm+6XC4Xi2FTNCz3pm5D3io9qO38/tsWD1kI+EQYf13xHtsmqUPR29mgwfcUW59mvhkx7/U3pxNNs7jBiFhRRsjv4JOPV75XQDRRbiDwxjYpyrvxozO2MsfymswqZ0T85CgnP8LhZ1HuCc0CIEecKM8PW7PstwV1x16WSNlTrpQiKs1ffJ1wATLWZun+x6VWbS1djoPlVqb/jE2xlP2dfjXKf9Vfm14tFNGXq5ufV582T7kzcWEi+nJ1I+15fv94u9mTi5qsPnR+/9j8zvcnatyKPQOtlDIsosZtQLPssUxw01oMm8xVKJFeag69n4nKvelG0bh+DZvEf+AiJXZ2+/A6Sc+06KLyIOkOtR3PSPz11/VJy79pk6ER9dqihyf3qZLI4TKxMRU67cy8TcFWUTSrPpF6oNPOTBqGeYTB6Oo5oeJd4B4CajtP/hOlNNe2ssRS9j8bVGLctZDBzcvQLAByxHFpFotwW5BINcnZoO74WspgqdN2cTTLr3Hdvnpd3lazmKSJRKX5uGQ6QM0IdUkmZXpOfvq1+ce0ifnFSBq2T9TYJoPlkyqtZtljmeD2ZHrKGBOJLjHBR8SdimT3Epolyxnj1iVlyJKFLioPk6J2kywxzC9kPuWSXCqoFLKrKVOB8lO5w+CeIYegS56ZRui+sr1m+TWuPlCL07fVLCadYaLineFdsIBsFgBA4eg0i1kMplXzJvIkmwldGieGZjHGnP6lmDSc+ycobYM0xxL/Rke/FZELljZlZdIsOUGl3ZPO73mHvkB6qfL1E9Ss0FgmLJrFBSuY6LJoFt9Nqb7ima+UarM2SaawCS+xjyIcMroFCLxMkkmzgtmmiJrFBSuYHrOMUD66rTSLj0pMGt4FhhdDs4S5bnsrIjP/zSYONAuAHHGiVGUdg2Yx3T+dylSgX7PUWcJAb3E0iyrV1UutS+T0a8HO42iWq4PdcaRrvSIxx6BZRHy6T540jKpZ2Ve181k2aSVMsxwErMjfSUaapU5W+jTLOMLgzoaedcLkHt3ZwAl2HkezXB3kKzhYD1dpmN3qWdAsAHLEMWazOEoJhZCezVM1m3WtVMTL03zxNItt5iJLo75mgi+GZjHGqFVbj2ujQG5Mv7NffSJrljr9F0mz/IVfwehMr1khsUwYNctfYhVRs1jKxVh2qO08ubNXykSetw+ddmbqJj6JFkwjRZk0DIpIJM3yK10gm6UfYXBn3QHqhYltzkmxM9BM8MXQLLY54c5WS95nvBY8NAuAHHG8msX8pqVUXPGb9byK+FZtLSW0gitXieItopJiORbN4tOUhtSUXc4ssaJe7pU6dF7zHqU2i87vxS2B/CbBUM1SW9GXqxu1mN1cAm+MxQwLOlizWV5eSm5r1ywq96ZyGqzcmw6b5lMbTn3SejJkd5QlnQIl8P6ictfA5Ip1pRNqO0pKTHRoqc3ytbqoPEQogdfW12tr6oOHySSJDH6xj0Wz+DSlOclnkTNLLFviLRAl6+/bgWYBkCN8mrXDBbT24TsN5eL3Vb/ATWvt1pIrWzX9BFZhkNeAeH+9WQcESF8dH9rKsOIDJ1hNbzt8qfj9x7cv4u5CsTSDslKDsuIDX+jhq7v6g3hRuwaEEk67oIO7cIM6URiMJbaaFnQQyy4oT+Xi92mvzLf++1//5NVXi2Fzc5fitFfmVVxu9kte0GHx4fp3i2YpqzmoiyxIayKY1l/YakEHsbPyVH7laVapu6s/2I9LGYN8J6N9hPKhaRd0cGvR1JOmr44PbWVY8YETrKY3Hi++0xAAYMXTrN0uUrorzTowgvktAMBW7P+XZOMiCUCOONlt5bsAmvVBumNjfguApFBWHzWtKZpT+Ddk7/+B4CIJQI44xi/bAQCA/IKLJAA5ApoFAAB5AhdJAHIENAsAAPIELpIA5AhoFgAA5AlcJAHIEdAsAADIE7hIApAjoFkAAJAncJEEIEdAswAAIE/gIglAjoBmAQBAnsBFEoAcAc0CAIA8gYskADkCmgUAAHkCF0kAcgQ0CwAA8gQukgDkCGiWDadfG1X2+tvNAADHxl5dJAEAdo5ds6hSXT1XHd03xRKV5uNSloPJGKLC6PkSHglAvoBmAZAjjlqziEpzg2MxxqhVTVtBqFJdvVzPW9tFiddK3xUVRs+1ruEMAAD2EGgWADnieDWLqDR/MRoGUWHUTyaVRa2aSYkS1yxLLGNv1vMAANg3oFkA5Igj1axQt4jhKyac/mVSXaUUC6YFQI6AZgGQI064Y+3ctLLUrHDHosJobJxM3D5WMhN8qcaCaQGQF6BZAOSIE/HTbk0rM82KUo0UTGVxg3l/veGPVb/g21qprtytYhNRYfTsNXl/vVlLHiOarP1yQ63aZudxSd6Nj8fYyhzLa/JcdYic/iXfIWhj9ko1AMCeAM0CIEecyE92aFrZaFaUe+u0qazu2MsSKZ3IlVJEpfmLr38uQMbaLF0OiVq1taQ7BufTmKIplrK/068aK9LM910CAPYEaBYAOeJEeb4r09qfbJatYt1NNcnZoO74WspgqdN2cTTLr3Hdvuo922oWkzTRskoFslkA5AJoFgA54ug0i1nrkExVWVywNhN5ks2EpsdiaBZjzOlfiknDuX+C0tLKEkukqUwSidosAPICNAuAHHFSk2DHoVnMnLnRWogyFejXLHWWMNA2jmZRpbp6qXWJtMvQx9EsVwe7Y1NDOBYA+QCaBUCOOMZsFidYh2RMZbnS4+3my2ZdKxXx8jRfPM1im7nIknbtrhiaxXjJ17g20uTGsBY8AHkCmgVAjjhezWIB07JOqHn6wm/W8yriW7W1lNAKrlwlireISorl2KYvWzXt/YD2VmGxVJ2CYwGQO6BZAOSIo9YsJhctWdfKkovfV/0CN621W0uubNWECKzCIK8B8f56s9YIkK46PrSVYcUHjlJND8cCII9AswDIEb7aLFGhlT270ixBgsu+7yfB/BYAII9AswDIEUf6ZTtHRXdszG8BAHIHLpIA5AhoFgAA5AlcJAHIEdAsAADIE7hIApAjoFkAAJAncJEEIEfso2bhgQceeOBheez2cg0AiM7eaRYAAAAAwGGwL5oFAAAAAHBgQLMAAAAAAFLh/wOU1B/BHH+aCgAAAABJRU5ErkJggg==" alt="" width="703" height="198" />

  3)最后在主活动中改写onCreate()方法:

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.activity_main); Button button1 = (Button) findViewById(R.id.button_1);
button1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(MainActivity.this,second_activity.class);
startActivity(intent);
}
});
}

  Intent有多个构造函数的重载,其中一个是 Intent(Context packageContext, Class)。这个构造函数接收两个参数,第一个参数 Context要求提供一个启动活动的上下文,第二个参数 Class 则是指定想要启动的目标活动, 通过这个构造函数就可以构建出 Intent的 “意图” 。而Activity类中提供了一个 startActivity()方法, 这个方法是专门用于启动活动的, 它接收一个Intent参数, 这里我们将构建好的Intent传入startActivity()方法就可以启动目标活动了。

  此时,启动程序,点击button 1 就会跳转到第二个Activity中。

二、隐式Intent

  相比于显式 Intent,隐式 Intent 则含蓄了许多,它并不明确指出我们想要启动哪一个活动, 而是指定了一系列更为抽象的 action和 category等信息, 然后交由系统去分析这个 Intent,并帮我们找出合适的活动去启动。

  1)首先我们在manifest文件中对second_activity进行修改:   

<activity android:name=".SecondActivity" >
<intent-filter>
<action android:name="com.example.activitytest.ACTION_START" />
<category android:name="android.intent.category.DEFAULT" />
<category android:name=""com.example.activitytest.MY_CATEGORY"" />
</intent-filter>
</activity>

  在<action>标签中我们指明了当前活动可以响应com.example.activitytest.ACTION_START 这个action,而<category>标签则包含了一些附加信息,更精确地指明了当前的活动能够响应的 Intent 中还可能带有的category。只有<action>和<category>中的内容同时能够匹配上Intent中指定的action和category时,这个活动才能响应该Intent。此处我们添加了两条category。

  2)然后我们在主活动的onCreate()方法中作出修改:

button1.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent("com.example.activitytest.ACTION_START");
intent.addCategory("com.example.activitytest.MY_CATEGORY");
startActivity(intent);
}
});

  我们使用了 Intent的另一个构造函数,直接将action的字符串传了进去,且由于android.intent.category.DEFAULT 是一种默认的category,所以在调用startActivity()方法的时候会自动将这个category添加到Intent中。每个Intent中只能指定一个action,但却能指定多个category,可以通过调用addCategory来添加。此时启动程序,应该能成功启动SecondActivity。但假如你添加的category,没有对应的活动来响应,程序很可能会崩溃。

三、更多的隐式调用

 1)假如我们想通过点击button1来启动一个浏览器,我们可以在主活动中加入修改onCreate方法如下:

button1.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setData(Uri.parse("http://www.baidu.com"));
startActivity(intent);
}
});

  这里我们首先指定了 Intent的action是Intent.ACTION_VIEW,这是一个Android 系统内置的动作,其常量值为android.intent.action.VIEW。然后通过Uri.parse()方法,将一个网址字符串解析成一个Uri对象(parse的中文意思便是“解析”),再调用Intent 的setData()方法将这个Uri对象传递进去。程序运行如下:

    Android学习笔记(三)——初探Intent  Android学习笔记(三)——初探Intent

  2)我们还可以在<intent-filter>标签中再配置一个<data>标签,用于更精确地指定当前活动能够响应什么类型的数据。<data>标签中主要可以配置以下内容。
    1.  android:scheme :用于指定数据的协议部分,如上例中的 http部分。
    2.  android:host :用于指定数据的主机名部分,如上例中的 www.baidu.com部分。
    3.  android:port :用于指定数据的端口部分,一般紧随在主机名之后。
    4.  android:path :用于指定主机名和端口之后的部分,如一段网址中跟在域名之后的内容。
    5.  android:mimeType :用于指定可以处理的数据类型,允许使用通配符的方式进行指定。

  只有<data>标签中指定的内容和Intent中携带的 Data 完全一致时, 当前活动才能够响应该Intent。不过一般在<data>标签中都不会指定过多的内容,如上面浏览器示例中,其实只需要指定android:scheme为 http,就可以响应所有的 http 协议的Intent了。

  例如我们在second_activity的manifest声明改成这样:

  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" alt="" width="635" height="167" />

  程序运行后出现以下界面:

  Android学习笔记(三)——初探Intent

  这说明My Application能够相应打开网页的Intent,不过这个活动并没有加载并显示网页的功能,所以在真正的项目中尽量不要去做这种有可能误导用户的行为。

  //End.