Android應用開發筆記

來源:互聯網
上載者:User

1. A service runs in the main thread of its hosting process—the service does not create
its own thread and does not run
in a separate process (unless you specify otherwise)

service雖然沒有UI,也不可以做耗時操作,否則依舊有ActivityManager報ANR,即使將service設定到另外一個process中也不行,雖然當前process的UI不會阻塞了,可是後台列印log發現,另一個process裡的service在大約30s後ANR了。。而且沒有ANR的提示框彈出。。。


2.startActivity

<activity
            android:name="com.example.call.MyActivity"
            android:label="@string/app_name2" >
            <intent-filter >
                <action android:name="ritter.com"/>
                <category android:name="android.intent.category.DEFAULT" />
            </intent-filter>
        </activity>

當使用隱式調用activity時,一定要在intent-filter裡指定category DEFAULT,因為預設的Intent會建立category DEFAULT。

Android treats all implicit intents passed to startActivity() as if they contained at least one category: "android.intent.category.DEFAULT"
(the CATEGORY_DEFAULT constant). Therefore, activities that are willing to receive implicit intents must include "android.intent.category.DEFAULT" in their intent filters


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