Android Master Detail 模板和 ActionBar

Question

我是 Android 新手..

我有一个关于 MasterDetail 模板的问题。

我有一个活动来管理用户登录。当登录数据正确时，我需要显示 Master Detail 模板。

所以，在 Android Studio 中，我在我的项目中添加了 Master/Detail Flow 活动。

在我的validateLogin() 方法中，登录数据正确后，我必须在主/明细流中显示Activitys，我使用此代码：

Intent myIntent = new Intent(Login.this, MasterDetailListActivity.class);
startActivity(myIntent);
finish();

如果此代码正确，我不安全，我还想显示 actionBar（实际上我只能在 detailView 中看到 ActionBar）。

******编辑********

这是我的列表活动的代码

public class BusinessPartnerListActivity extends FragmentActivity
        implements BusinessPartnerListFragment.Callbacks {

    /**
     * Whether or not the activity is in two-pane mode, i.e. running on a tablet
     * device.
     */
    private boolean mTwoPane;

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

        if (findViewById(R.id.businesspartner_detail_container) != null) {
            // The detail container view will be present only in the
            // large-screen layouts (res/values-large and
            // res/values-sw600dp). If this view is present, then the
            // activity should be in two-pane mode.
            mTwoPane = true;

            // In two-pane mode, list items should be given the
            // 'activated' state when touched.
            ((BusinessPartnerListFragment) getSupportFragmentManager()
                    .findFragmentById(R.id.businesspartner_list))
                    .setActivateOnItemClick(true);
        }

        // TODO: If exposing deep links into your app, handle intents here.
    }

    /**
     * Callback method from {@link BusinessPartnerListFragment.Callbacks}
     * indicating that the item with the given ID was selected.
     */
    @Override
    public void onItemSelected(String id) {
        if (mTwoPane) {
            // In two-pane mode, show the detail view in this activity by
            // adding or replacing the detail fragment using a
            // fragment transaction.
            Bundle arguments = new Bundle();
            arguments.putString(BusinessPartnerDetailFragment.ARG_ITEM_ID, id);
            BusinessPartnerDetailFragment fragment = new BusinessPartnerDetailFragment();
            fragment.setArguments(arguments);
            getSupportFragmentManager().beginTransaction()
                    .replace(R.id.businesspartner_detail_container, fragment)
                    .commit();

        } else {
            // In single-pane mode, simply start the detail activity
            // for the selected item ID.
            Intent detailIntent = new Intent(this, BusinessPartnerDetailActivity.class);
            detailIntent.putExtra(BusinessPartnerDetailFragment.ARG_ITEM_ID, id);
            startActivity(detailIntent);
        }
    }
}

...以及详细活动...

public class BusinessPartnerDetailActivity extends ActionBarActivity {

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

        // Show the Up button in the action bar.
        getSupportActionBar().setDisplayHomeAsUpEnabled(true);

        // savedInstanceState is non-null when there is fragment state
        // saved from previous configurations of this activity
        // (e.g. when rotating the screen from portrait to landscape).
        // In this case, the fragment will automatically be re-added
        // to its container so we don't need to manually add it.
        // For more information, see the Fragments API guide at:
        //
        // http://developer.android.com/guide/components/fragments.html
        //
        if (savedInstanceState == null) {
            // Create the detail fragment and add it to the activity
            // using a fragment transaction.
            Bundle arguments = new Bundle();
            arguments.putString(BusinessPartnerDetailFragment.ARG_ITEM_ID,
                    getIntent().getStringExtra(BusinessPartnerDetailFragment.ARG_ITEM_ID));
            BusinessPartnerDetailFragment fragment = new BusinessPartnerDetailFragment();
            fragment.setArguments(arguments);
            getSupportFragmentManager().beginTransaction()
                    .add(R.id.businesspartner_detail_container, fragment)
                    .commit();
        }
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        int id = item.getItemId();
        if (id == android.R.id.home) {
            // This ID represents the Home or Up button. In the case of this
            // activity, the Up button is shown. Use NavUtils to allow users
            // to navigate up one level in the application structure. For
            // more details, see the Navigation pattern on Android Design:
            //
            // http://developer.android.com/design/patterns/navigation.html#up-vs-back
            //
            NavUtils.navigateUpTo(this, new Intent(this, BusinessPartnerListActivity.class));
            return true;
        }
        return super.onOptionsItemSelected(item);
    }
}

***** 编辑（视频）****** ActionBar 动画问题视频

https://www.dropbox.com/s/af07ovbv36pn44x/actionbab_issue.mov?dl=0

Answer 1

您需要从ActionBarActivity 扩展而不是FragmentActivity。将您的列表视图活动定义更改为：

public class BusinessPartnerListActivity extends ActionBarActivity
    implements BusinessPartnerListFragment.Callbacks {


    // rest of the code remains the same ...
    // ...
    // ...

}

试试这个。这将起作用。

Answer 2

是的，你做得对，我的意思是你的代码是完美的。如果你想完成你的当前然后

finish();

在其他方面是完美的，无需调用它。