我正在构建一个用于导航的基础 Activity ，并且想要一些灵活的东西，因此该 Activity 指示要展开哪个布局的基础 Activity 。

我有以下内容

public abstract class BaseActivity extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener {

    private int mLayoutRes;

    protected void setLayout(int layoutRes) {
        mLayoutRes = layoutRes;
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(mLayoutRes);

        // Layout implements toolbar
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        if (toolbar != null){
            setSupportActionBar(toolbar);
        }


        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
        // The layout implements the nav
        if (drawer != null){
            ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
                this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
            drawer.setDrawerListener(toggle);
            toggle.syncState();

            NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
            navigationView.setNavigationItemSelectedListener(this);
        }

    }
// Other Nav code ommitted as its too verbose
}

然后布局从 Activity 中传递如下

public class Home extends BaseActivity {

    private final String TAG = "Home";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.setLayout(R.layout.activity_home);
        super.onCreate(savedInstanceState);
        // Other Activity code
    }
}

有没有更好的方法来实现这一点？ 也许设置一个带有内容框架的基本布局并膨胀到其中？

如有任何建议，我们将不胜感激。

最佳答案

可以关注BaseActivity来自 Google IO 应用程序。只需重写 setContentView 就不需要 setLayout

这是我的 BaseActivity

package com.vtcmobile.kqviet.activity;


public class BaseActivity extends AppCompatActivity {

private Toolbar toolbar;

private DrawerLayout drawerLayout;
private ActionBarDrawerToggle drawerToggle;
private NavigationView navigationView;
protected Context mContext;


public NavigationView getNavigationView() {
    return navigationView;
}

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    mContext = BaseActivity.this;

}

@Override
public void setContentView(int layoutResID) {
    super.setContentView(layoutResID);
    initToolbar();
}

private void initToolbar() {
    toolbar = (Toolbar) findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);
}

private void setUpNav() {
    drawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
    drawerToggle = new ActionBarDrawerToggle(BaseActivity.this, drawerLayout, R.string.app_name, R.string.app_name);
    drawerLayout.setDrawerListener(drawerToggle);

    getSupportActionBar().setHomeButtonEnabled(true);
    getSupportActionBar().setDisplayHomeAsUpEnabled(true);
    getSupportActionBar().setDisplayShowTitleEnabled(false);

    navigationView = (NavigationView) findViewById(R.id.navigation);


    // Setting Navigation View Item Selected Listener to handle the item
    // click of the navigation menu
    navigationView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() {

        public boolean onNavigationItemSelected(MenuItem menuItem) {

            // Checking if the item is in checked state or not, if not make
            // it in checked state
            if (menuItem.isChecked())
                menuItem.setChecked(false);
            else
                menuItem.setChecked(true);

            // Closing drawer on item click
            drawerLayout.closeDrawers();

            // Check to see which item was being clicked and perform
            // appropriate action
            Intent intent;
            switch (menuItem.getItemId()) {

            case R.id.xxxx:

                return true;



            }
            return false;
        }
    });

    // Setting the actionbarToggle to drawer layout

    // calling sync state is necessay or else your hamburger icon wont show
    // up
    drawerToggle.syncState();

}

@Override
public void onPostCreate(Bundle savedInstanceState) {
    super.onPostCreate(savedInstanceState);
    setUpNav();

    drawerToggle.syncState();
}

@Override
public void onConfigurationChanged(Configuration newConfig) {
    super.onConfigurationChanged(newConfig);
    drawerToggle.onConfigurationChanged(newConfig);
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.menu_main, menu);
    return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    if (drawerToggle.onOptionsItemSelected(item))
        return true;

    // Handle action bar item clicks here. The action bar will
    // automatically handle clicks on the Home/Up button, so long
    // as you specify a parent activity in AndroidManifest.xml.
    int id = item.getItemId();

    if (id == R.id.action_settings) {
        return true;
    }

    return super.onOptionsItemSelected(item);
}




 }

关于android - 导航的 BaseActivity，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/33009469/