如何更改 Android 应用程序上的抽屉切换图标？

Question

我在我的安卓应用上创建了一个抽屉开关。它显示在屏幕的左上角。当我单击切换时，列表视图项目将显示在左侧。 下面的屏幕是主屏幕：

当我点击切换时，它将显示如下：

现在我想通过以下代码更改切换按钮的图标：

mDrawerToggle.setHomeAsUpIndicator(R.drawable.ic_drawer);
mDrawerToggle.setDrawerIndicatorEnabled(false);

切换图标已更改为我的可绘制对象，但当我单击切换时不会显示列表视图项。我想知道为什么更改切换图标会禁用切换点击。

下面是我的活动课：

public class MainActivity extends AppCompatActivity {
    private DrawerLayout mDrawerLayout;
    private ListView mDrawerList;
    private ActionBarDrawerToggle mDrawerToggle;
    private String[] mPlanetTitles;

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

        setContentView(R.layout.activity_main);
        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
        getSupportActionBar().setHomeButtonEnabled(true);
        getSupportActionBar().setDisplayShowTitleEnabled(false);

        mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);

        mDrawerList = (ListView) findViewById(R.id.left_drawer);
        mPlanetTitles = getResources().getStringArray(R.array.planets_array);
        // Set the adapter for the list view
        mDrawerList.setAdapter(new ArrayAdapter<String>(this,
                R.layout.drawer_list_item, mPlanetTitles));
        mDrawerList.setOnItemClickListener(new DrawerItemClickListener());

        mDrawerToggle = new ActionBarDrawerToggle(
                this,                  /* host Activity */
                mDrawerLayout,
                R.string.drawer_open,  /* "open drawer" description for accessibility */
                R.string.drawer_close  /* "close drawer" description for accessibility */
        ) {
            public void onDrawerClosed(View view) {
                invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu()
            }

            public void onDrawerOpened(View drawerView) {
                invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu()
            }
        };
        mDrawerToggle.setHomeAsUpIndicator(R.drawable.ic_drawer);
//        mDrawerToggle.setDrawerIndicatorEnabled(false);
        mDrawerLayout.addDrawerListener(mDrawerToggle);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        if(mDrawerToggle.onOptionsItemSelected(item)) {
            return true;
        }
        return super.onOptionsItemSelected(item);
    }

    @Override
    protected void onPostCreate(Bundle savedInstanceState) {
        super.onPostCreate(savedInstanceState);
        // Sync the toggle state after onRestoreInstanceState has occurred.
        mDrawerToggle.syncState();
    }

    @Override
    public void onConfigurationChanged(Configuration newConfig) {
        super.onConfigurationChanged(newConfig);
        // Pass any configuration change to the drawer toggls
        mDrawerToggle.onConfigurationChanged(newConfig);
    }


    /* The click listner for ListView in the navigation drawer */
    private class DrawerItemClickListener implements ListView.OnItemClickListener {
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
        }
    }
}

Answer 1

v7 ActionBarDrawerToggle 实际上只做两件事：打开/关闭抽屉，提供汉堡图标及其动画。调用 setDrawerIndicatorEnabled(false) 将删除它的图标，但它也会禁用切换。如果你不想要那个图标，那么你最好不要使用ActionBarDrawerToggle，而是自己处理打开/关闭抽屉。

• 首先，删除ActionBarDrawerToggle 的所有代码。
• 然后使用getSupportActionBar().setHomeAsUpIndicator() 设置您想要的图标。
• 在onOptionsItemSelected() 中，如果MenuItem 的ID 为android.R.id.home，则根据需要打开或关闭抽屉。
• 最后，ActionBarDrawerToggle 的DrawerLayout.DrawerListener 功能可以替换为基本的SimpleDrawerListener。

---

public class MainActivity extends AppCompatActivity {
    private DrawerLayout mDrawerLayout;
    private ListView mDrawerList;
    private String[] mPlanetTitles;

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

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

        mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);

        mDrawerList = (ListView) findViewById(R.id.left_drawer);
        mPlanetTitles = getResources().getStringArray(R.array.planets_array);
        // Set the adapter for the list view
        mDrawerList.setAdapter(new ArrayAdapter<String>(this,
            R.layout.drawer_list_item, mPlanetTitles));
        mDrawerList.setOnItemClickListener(new DrawerItemClickListener());

        // *** Set your desired icon
        getSupportActionBar().setHomeAsUpIndicator(R.drawable.ic_drawer);

        // *** Replace the DrawerListener functionality of the ActionBarDrawerToggle
        mDrawerLayout.addDrawerListener(new DrawerLayout.SimpleDrawerListener() {
                @Override
                public void onDrawerClosed(View view) {
                    invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu()
                }

                @Override
                public void onDrawerOpened(View drawerView) {
                    invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu()
                }
            }
        );
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // *** If the home button is clicked, open/close the drawer as needed
        if (item.getItemId() == android.R.id.home) {
            if (mDrawerLayout.isDrawerOpen(GravityCompat.START)) {
                mDrawerLayout.closeDrawer(GravityCompat.START);
            }
            else {
                mDrawerLayout.openDrawer(GravityCompat.START);
            }

            return true;
        }

        return super.onOptionsItemSelected(item);
    }

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

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

    /* The click listner for ListView in the navigation drawer */
    private class DrawerItemClickListener implements ListView.OnItemClickListener {
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
        }
    }
}

Answer 2

更改切换按钮的图标后使用syncState()。

mDrawerToggle.setHomeAsUpIndicator(R.drawable.ic_drawer);
mDrawerToggle.setDrawerIndicatorEnabled(false);
mDrawerToggle.syncState();