[Android] enable / disable activity

Posted on Edited on In

Android 內建了很多Activity, 有些是不希望被end user看到
所以有幾種方式可以將Activity不出現在 Home/app list

  • 1 AndroidManifest.xml
<action android:name="android.intent.action.MAIN"  />
<category android:name="android.intent.category.LAUNCHER" />

將上述兩個其中一個移除即可
優點：簡單、易懂
缺點：需要rebuild app. Activity才會出現在app list.

  • 2 使用PackageManager 的API
    使用PackageManager的API, 可以在程式中設定一個Activity的state為enable or disable.
import android.content.ComponentName;
import android.content.pm.PackageManager;
/*......................................................*/
......
......
PackageManager pm=getPackageManager();
ComponentName cpn = new ComponentName(packageName, ClassName);
pm.setComponentEnabledSetting(cpn, PackageManager.COMPONENT_ENABLED_STATE_ENABLED, 
            PackageManager.DONT_KILL_APP); // enable app
pm.setComponentEnabledSetting(cpn, PackageManager.COMPONENT_ENABLED_STATE_DISABLED, 
            PackageManager.DONT_KILL_APP); // disable app.
.......
.......
```	
上面的例子是使用setComponentEnabledSetting這個API.	
下面的例子則是使用 setApplicationEnabledSetting.		

```java
import android.content.pm.PackageManager;
/*......................................................*/
......
......
PackageManager pm=getPackageManager();

pm.setApplicationEnabledSetting(ActivityName, PackageManager.COMPONENT_ENABLED_STATE_ENABLED, 
            PackageManager.DONT_KILL_APP); // enable app
pm.setApplicationEnabledSetting(ActivityName, PackageManager.COMPONENT_ENABLED_STATE_DISABLED, 
            PackageManager.DONT_KILL_APP); // disable app.
.......
.......

[參考連結 - setComponentEnabledSetting](http://developer.android.com/reference/android/content/pm/PackageManager.html#setComponentEnabledSetting(android.content.ComponentName, int, int))
[參考連結 - setApplicationEnabledSetting](http://developer.android.com/reference/android/content/pm/PackageManager.html#setApplicationEnabledSetting(java.lang.String, int, int))