今天想除錯多個task中棧的情況，在測試程式中呼叫另一個程式的activity，

程式碼片段如下：

        btnStartX=(Button)findViewById(R.id.btnStartX);
        btnStartX.setOnClickListener(new View.OnClickListener() {
			
			@Override
			public void onClick(View v) {
				// TODO Auto-generated method stub
				Intent myIntent = new Intent();
				myIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
				myIntent.setClassName("com.linc.TestBackStackXYZ", 
						"com.linc.TestBackStackXYZ.ActivityX");
				startActivity(myIntent);
			}
		});
 

結果報錯：

java.lang.SecurityException: Permission Denial: starting Intent { flg=0x10000000 cmp=com.linc.TestBackStackXYZ/.ActivityX } from ProcessRecord{406f5a18 370:com.linc.TestBackStack/10042} (pid=370, uid=10042) requires null

        <activity android:name="ActivityX" android:label="ActivityX">
        	<intent-filter> 
        		<action android:name="android.intent.action.MAIN" /> 
       		</intent-filter>
        </activity>