Aus Navigation drawer Activity in andere activity wechseln

Intent intent = new Intent(view.getContext(), beispielClass.class);
startActivity(intent);

       <activity
            android:name=".MainActivity"  
            android:label="@string/app_name"  
            android:screenOrientation="portrait">  
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />  

                <category android:name="android.intent.category.LAUNCHER" />  
            </intent-filter>
        </activity>

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