我正在尝试编写一个简单的应用程序,并按照ApiDemos示例进行操作。我的应用程序在启动时崩溃了。我怀疑我的清单有问题,但我不确定。有什么想法吗?
public class managerActivity extends DeviceAdminReceiver {
public class Controller extends Activity {
static final int RESULT_ENABLE = 1;
DevicePolicyManager mDPM;
ActivityManager mAM;
ComponentName mDeviceAdminSample;
Button mEnableButton;
Button mDisableButton;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mDPM = (DevicePolicyManager)getSystemService(Context.DEVICE_POLICY_SERVICE);
mAM = (ActivityManager)getSystemService(Context.ACTIVITY_SERVICE);
mDeviceAdminSample = new ComponentName(Controller.this, managerActivity.class);
setContentView(R.layout.main);
}
}
然后在我的清单中,我有:
<application android:icon="@drawable/icon" android:label="@string/app_name">
<activity android:name="com.appname.managerActivity$Controller"
android:label="@string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
<category android:name="android.intent.category.HOME" />
<category android:name="android.intent.category.DEFAULT" />
<action android:name="android.app.action.DEVICE_ADMIN_ENABLED" />
</intent-filter>
</activity>
<!-- Device Admin Samples -->
<receiver android:name="com.appname.managerActivity"
android:label="@string/sample_device_admin"
android:description="@string/sample_device_admin_description"
android:permission="android.permission.BIND_DEVICE_ADMIN">
<meta-data android:name="android.app.device_admin"
android:resource="@xml/device_admin_sample" />
<intent-filter>
<action android:name="android.app.action.DEVICE_ADMIN_ENABLED" />
</intent-filter>
</receiver>
这是崩溃:
11-11 15:20:52.310:ERROR / AndroidRuntime(553): java.lang.RuntimeException:无法实例化活动 ComponentInfo {com.appname.manager / com.appname.managerActivity $控制器}: java.lang.InstantiationException: com.appname.managerActivity $控制器
答案 0 :(得分:1)
除非它是静态的,否则无法从其封闭类的外部创建嵌套类。将您的活动移至独立类(即未嵌套),或将活动类设为静态。