我在Activity中尝试启动Service，但出现“undefined intent constructor”的报错信息。
MyService.java代码如下：
public class MyService extends Service {@Overridepublic IBinder onBind(Intent intent) { return null;}public static boolean isInstanceCreated() { return instance != null; }@Overridepublic void onCreate() { Toast.makeText(this, "My Service Created", Toast.LENGTH_LONG).show(); Log.d(TAG, "onCreate"); instance = this;}@Overridepublic void onDestroy() { Toast.makeText(this, "My Service Stopped", Toast.LENGTH_LONG).show(); Log.d(TAG, "onDestroy"); instance = null;}@Overridepublic void onStart(Intent intent, int startid) { Toast.makeText(getBaseContext(), "Service started",Toast.LENGTH_SHORT).show(); }}启动SampleService.java的代码如下：
public class SampleService extends Activity{@Overrideprotected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.grid_activity); Intent myintent =new Intent(SampleService.this,MyService.this);//Error show here.. startService(myintent); } }在manifest file中设定service的初值如下：
<service android:enabled="true" android:name="com.MyApp.MyService" />请大家帮我解决这个错误。
原问题：Error:undefined intent constructor when start service in android
解决方案
答：kalyan pvs(最佳答案）
你不应该使用Service.this，而应该按如下方法改变class：
Intent myintent =new Intent(SampleService.this,MyService.Class);答：Raghunandan
做如下调整：
Intent myintent =new Intent(SampleService.this,MyService.this);变为：
Intent myintent =new Intent(SampleService.this,MyService.Class); // first param is a context second param is a class in your case a MyServiceClass你没有设置类似于Intent(SampleService, MyService)的构造函数，在intent constructor参数设定上出现错误。
public Intent (Context packageContext, Class<?> cls)Added in API level 1Create an intent for a specific component. All other fields (action, data, type, class) are null, though they can be modified later with explicit calls. This provides a convenient way to create an intent that is intended to execute a hard-coded class name, rather than relying on the system to find an appropriate class for you; see setComponent(ComponentName) for more information on the repercussions of this.ParameterspackageContext A Context of the application package implementing this class.clsThe component class that is to be used for the intent.