android-fragments - Android错误膨胀类片段，那么我如何使用带有selectedFragment的地图？

Question

这是我的代码片段。当我在靠近我的点击片段上选择时，我只想在活动中显示地图。

public class MainActivity extends FragmentActivity {
Map m = new Map();

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

    android.support.v4.app.FragmentManager fm = getSupportFragmentManager();
    android.support.v4.app.FragmentTransaction transaction = fm
            .beginTransaction();
    Fragment startFragment = new ViewAll();

    transaction.add(R.id.fragment_placeholder, startFragment);
    transaction.commit();

}

public void onSelectFragment(View view) {

    Fragment newFragment;

    if (view == findViewById(R.id.btnNearMe)) {
        newFragment = new NearMe();
    } else if (view == findViewById(R.id.btnCategory)) {
        newFragment = new Category();
    } else if (view == findViewById(R.id.btnViewAll)) {
        newFragment = new ViewAll();
    } else if (view == findViewById(R.id.btnSignIn)) {
        newFragment = new SignUpIn();
    } else {
        newFragment = new ViewAll();
    }

    android.support.v4.app.FragmentTransaction transaction = getSupportFragmentManager()
            .beginTransaction();
    transaction.replace(R.id.fragment_placeholder, newFragment);
    transaction.addToBackStack(null);
    transaction.commit();

}