Android支持工具栏+ ActionBarDrawerToggle不更改为箭头

Question

我正在努力工作的工具栏和抽屉.我正在尝试将汉堡切换为箭头,当我向后台堆叠添加新片段但是没有办法做到这一点.

也许我错过了一些东西,但我找不到办法.有人有同样的问题吗？

这是声明:

mDrawerToggle = new ActionBarDrawerToggle(
            getActivityCompat(),                    /* host Activity */
            mDrawerLayout,                    /* DrawerLayout object */
            ((BaseActivity) getActivityCompat()).getToolbar(),
            R.string.navigation_drawer_open,  /* "open drawer" description for accessibility */
            R.string.navigation_drawer_close  /* "close drawer" description for accessibility */
    )

这是我将一个片段添加到后栈时调用的函数

public void setToggleState(boolean isEnabled) {
    if (mDrawerLayout == null)
        return;

    if (isEnabled) {
        mDrawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_UNLOCKED);
        mDrawerToggle.onDrawerStateChanged(DrawerLayout.LOCK_MODE_UNLOCKED);
    } else {
        mDrawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED);
        mDrawerToggle.onDrawerStateChanged(DrawerLayout.LOCK_MODE_LOCKED_CLOSED);
    }
    mDrawerToggle.syncState();
}

Answer 1

我想你要做的就是删除第三个参数.从而:

mDrawerToggle = new ActionBarDrawerToggle(
     getActivityCompat(),              /* host Activity */
     mDrawerLayout,                    /* DrawerLayout object */
     // ((BaseActivity) getActivityCompat()).getToolbar(), <== delete this argument
     R.string.navigation_drawer_open,  /* "open drawer" description for accessibility */
     R.string.navigation_drawer_close  /* "close drawer" description for accessibility */
    );

愿它有所帮助.

Answer 2

我有同样的问题.我的解决方案是:

确保您的活动实现onBackStackChangedListener.在你的活动'onCreate中,我设置了backstack监听器,并设置了工具栏

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

    mFm = getFragmentManager();
    mFm.addOnBackStackChangedListener(this);

    // Setup toolbar
    mToolbar = (Toolbar) findViewById(R.id.toolbar);
    mToolbar.setVisibility(View.VISIBLE);
    setSupportActionBar(mToolbar);

    // Setup drawer toggle
    mDrawerLayout = (DrawerLayout) findViewById(R.id.drawerlayout);
    mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout, mToolbar, R.string.menu_open, R.string.menu_close);
    mDrawerLayout.setDrawerListener(mDrawerToggle);
    getSupportActionBar().setHomeButtonEnabled(true);
    mDrawerToggle.syncState();

    // Setup initial fragment
    if (savedInstanceState == null) {
        mCurrentFragment = DashboardFragment.newInstance();
        mFm.beginTransaction().add(CONTAINER_ID, mCurrentFragment).commit();
    }
}

还记得设置:

@Override
protected void onPostCreate(Bundle savedInstanceState) {
    super.onPostCreate(savedInstanceState);
    mDrawerToggle.syncState();
}

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

现在魔术发生在onBackStackChanged()上.将最顶层片段的setDrawerIndicatorEnabled设置为true,将该片段设置为setDisplayHomeAsUpEnabled为false.反向其他的.我还必须调用syncState,否则汉堡包不会再出现:

@Override
public void onBackStackChanged() {
    mDrawerToggle.setDrawerIndicatorEnabled(mFm.getBackStackEntryCount() == 0);
    getSupportActionBar().setDisplayHomeAsUpEnabled(mFm.getBackStackEntryCount() > 0);
    mDrawerToggle.syncState();
}