android中显式和隐式活动调用有什么区别? [英] What is the different between Explicit and implicit activity call in android?

问题描述

android 中显式和隐式活动调用有什么区别?如果你用一个简单的例子来解释答案会很好.

What is the difference between explicit and implicit activity call in android? If you explain the answer with a simple example will be good.

推荐答案

例如:

隐式活动调用

在意图过滤器中，您为您的活动创建操作，因此其他应用程序可以通过此操作调用您的活动，如下所示:

In intent filter you create action for you activity, so other app can call your activity via this action as following:

<activity android:name=".BrowserActivitiy" android:label="@string/app_name">
   <intent-filter>
      <action android:name="android.intent.action.VIEW" />
      <category android:name="android.intent.category.DEFAULT" />
      <data android:scheme="http"/> 
   </intent-filter>
</activity>

另一种调用隐式 Intent 的方法如下:

And the other way to call implicit Intent is below:

Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse("http://www.example.com"));
startActivity(intent);

显式活动调用

您拨打的电话会准确指明是哪个活动类别:

You make a call that indicate exactly which activity class:

Intent intent = new Intent(this, ActivityABC.class);
intent.putExtra("Value", "This value for ActivityABC");
startActivity(intent);

希望这能帮助您更多地了解 android 中的显式和隐式活动调用.

Hope this help you understand more about Explicit and implicit activity call in android.

您可以在此处

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