尝试执行startActivity时出现Android错误

Question

我正在尝试向操作栏添加功能。当我按下按钮时，我想去另一个活动。我之前做过它并且它有效，但现在我收到以下错误：

12-27 17:22:48.218 1339-1350/? W/Binder:
    Caught a RuntimeException from the binder stub implementation.
    java.lang.NullPointerException
    at android.inputmethodservice.IInputMethodWrapper.setSessionEnabled(IInputMethodWrapper.java:280)
    at com.android.internal.view.IInputMethod$Stub.onTransact(IInputMethod.java:129)
    at android.os.Binder.execTransact(Binder.java:404)
    at dalvik.system.NativeStart.run(Native Method)
12-27 17:22:48.218 1253-1416/? W/InputMethodManagerService:
    Got RemoteException sending setActive(false) notification to pid 2082 uid 10056

这是代码：

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    switch (item.getItemId()) {
        case R.id.ajustes:
            return true;
        case R.id.modo_edicion:
            Intent intent = new Intent(ImagenesAlumnoActivity.this, ModoEdicionActivity.class);
            startActivity(intent);
            return true;
    }
    return super.onOptionsItemSelected(item);
}

这是我要展示的活动的代码。

 public class ModoEdicionActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_modo_edicion);
    }
}