【异常解决】android.content.ActivityNotFoundException: Unable to find explicit activity class

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异常：

01-01 16:19:13.269: E/AndroidRuntime(2969): android.content.ActivityNotFoundException: Unable to find explicit activity class {com.x210.communication/com.x210.communication.SubActivity};have you declared this activity in your AndroidManifest.xml?

问题呈现：

@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);textView = (TextView) findViewById(R.id.textShow);final Button btn1 = (Button) findViewById(R.id.btn1);btn1.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {Intent intent = new Intent(ActivityCommunication.this,SubActivity.class);startActivity(intent);//从当前Activity跳转到SubActivity}});}

AndroidManifest.xml

<application        android:icon="@drawable/ic_launcher"        android:label="@string/app_name" >        <activity            android:label="@string/app_name"            android:name=".ActivityCommunication" >            <intent-filter >                <action android:name="android.intent.action.MAIN" />                <category android:name="android.intent.category.LAUNCHER" />            </intent-filter>        </activity>        </application>

问题解决：

其实可以根据错误提示：have you declared this activity in your AndroidManifest.xml? 知道错误根源是在清单文件中没有注册Activity；

在AndroidManifest.xml的<application></application>节点中添加如下注册代码即可：

 <activity android:name =".SubActivity"/>