android - 如何使用 AppCompat 库在 ActionBar 中显示 NavigationDrawer 图标

Question

我对 NavigationDrawer 图标有疑问，我希望它在 ActionBar 中可见。需要向用户展示，他可以通过从屏幕左边缘滑动来打开我应用程序中的抽屉。

我以前使用这段代码没有任何问题，但在这个应用程序中它不能正常工作，我不知道问题出在哪里。请帮助我。

这是我的代码:

    mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
    mDrawerList = (ListView) findViewById(R.id.left_drawer);

    ArrayList<Integer> smIcon_adrs = new ArrayList<Integer>();
    smIcon_adrs.add(R.drawable.sm_font);
    smIcon_adrs.add(R.drawable.sm_size);
    smIcon_adrs.add(R.drawable.sm_count);
    smIcon_adrs.add(R.drawable.sm_about);
    ArrayAdapter<Integer> sm_adapter = new smIcoAdapter(getBaseContext(),
            smIcon_adrs);

    mDrawerList.setAdapter(sm_adapter);

    mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout,
            R.drawable.ic_drawer, R.string.hello_world, R.string.app_name) {

        /** Called when a drawer has settled in a completely closed state. */
        public void onDrawerClosed(View view) {

            getSupportActionBar().setTitle("دعا عهد");
            supportInvalidateOptionsMenu(); 
            super.onDrawerClosed(view);
        }

        /** Called when a drawer has settled in a completely open state. */
        public void onDrawerOpened(View drawerView) {
            getSupportActionBar().setTitle("امکانات");
            supportInvalidateOptionsMenu(); 
            super.onDrawerOpened(drawerView);
                                        // onPrepareOptionsMenu()
        }
    };

    mDrawerLayout.setDrawerShadow(R.drawable.drawer_shadow, GravityCompat.START); 
    mDrawerLayout.setDrawerListener(mDrawerToggle);

这里:

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu items for use in the action bar
    MenuInflater inflater = getMenuInflater();
    inflater.inflate(R.menu.main, menu);

    return super.onCreateOptionsMenu(menu);
}

@Override
protected void onPostCreate(Bundle savedInstanceState) {
    super.onPostCreate(savedInstanceState);
     mDrawerToggle.syncState();
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
    switch (item.getItemId()) {
    case R.id.action_play:
        if (mp.isPlaying()) {
            item.setIcon(R.drawable.actn_play);
            mp.pause();
        } else {
            updateProgressBar();
            mp.start();
            item.setIcon(R.drawable.actn_stop);
        }
        break;

    }
    if (mDrawerToggle.onOptionsItemSelected(item)) {

        return true;
    }
    return super.onOptionsItemSelected(item);
}
public boolean onPrepareOptionsMenu(Menu menu) {
    mDrawerLayout.isDrawerOpen(mDrawerList);
    // menu.findItem(R.id.action_settings).setVisible(!drawerOpen);
    return super.onPrepareOptionsMenu(menu);
}

Answer 1

这里有人有类似的问题，你可以测试那里发布的解决方案:https://stackoverflow.com/a/23332975/1738838 .

据此，您缺少此方法:

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