无法从工具栏菜单项打开 NavigationDrawer android

Question

您好，我尝试使用本教程在 android 中制作 NavigationDrawer，但我不想更改抽屉的打开方式。教程是这样的： http://www.androidhive.info/2015/04/android-getting-started-with-material-design/

在本教程中，抽屉使用工具栏中的默认主页按钮打开，我想使用菜单项打开它。

这是我的主要代码：

public class First_page extends AppCompatActivity implements FragmentDrawer.FragmentDrawerListener  {

    Button go_layout;
    private Toolbar toolbar;
    private FragmentDrawer drawerFragment;

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

        toolbar = (Toolbar)findViewById(R.id.toolbar);

        setSupportActionBar(toolbar);
        getSupportActionBar().setDisplayShowTitleEnabled(false);
        getSupportActionBar().setHomeButtonEnabled(true);
        getSupportActionBar().setDisplayUseLogoEnabled(true);
        getSupportActionBar().setLogo(R.drawable.page_logo_2);

        drawerFragment = (FragmentDrawer)
                getSupportFragmentManager().findFragmentById(R.id.fragment_navigation_drawer);
        drawerFragment.setUp(R.id.fragment_navigation_drawer, (DrawerLayout) findViewById(R.id.drawer_layout), toolbar);
        drawerFragment.setDrawerListener(this);

        go_layout = (Button)findViewById(R.id.go_to_page);

        go_layout.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {

                Intent intent = new Intent(First_page.this, Full_page.class);
                startActivity(intent);

            }
        });
    }

    @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) {
        // 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();

        //noinspection SimplifiableIfStatement
        if (id == R.id.right_btn) {


            Toast.makeText(First_page.this, "Right_btn clicked", Toast.LENGTH_LONG).show();

            drawerFragment = (FragmentDrawer)
                    getSupportFragmentManager().findFragmentById(R.id.fragment_navigation_drawer);
            drawerFragment.setUp(R.id.fragment_navigation_drawer, (DrawerLayout) findViewById(R.id.drawer_layout), toolbar);
            drawerFragment.setDrawerListener(this);

        }

        return super.onOptionsItemSelected(item);
    }

    @Override
    public void onDrawerItemSelected(View view, int position) {

    }
}

Answer 1

下面是我如何处理 NavigationDrawer 的打开和关闭。只需在您想打开或关闭它的地方调用 handleNavDrawer() 即可。

处理抽屉的打开和关闭

public void handleNavDrawer() {
    if (mNavigationDrawer.isDrawerOpen(GravityCompat.START)) {
        mNavigationDrawer.closeDrawer(GravityCompat.START);
    } else {
        mNavigationDrawer.openDrawer(GravityCompat.START);
    }
}

工作示例

public class MainActivity extends AppCompatActivity {

    private DrawerLayout mNavigationDrawer;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_tracker);
        mNavigationDrawer = (DrawerLayout) findViewById(R.id.drawer_layout);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        int id = item.getItemId();
        if (id == R.id.action_search) { 
            handleNavDrawer();
            return true;
        }
        return super.onOptionsItemSelected(item);
    }

    public void handleNavDrawer() {
        if (mNavigationDrawer.isDrawerOpen(GravityCompat.START)) {
            mNavigationDrawer.closeDrawer(GravityCompat.START);
        } else {
            mNavigationDrawer.openDrawer(GravityCompat.START);
        }
    }
}

用你的例子更新

public class First_page extends AppCompatActivity implements FragmentDrawer.FragmentDrawerListener  {

    Button go_layout;
    private Toolbar toolbar;
    private FragmentDrawer drawerFragment;
    private DrawerLayout mNavigationDrawer;

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

        toolbar = (Toolbar)findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);
        getSupportActionBar().setDisplayShowTitleEnabled(false);
        getSupportActionBar().setHomeButtonEnabled(true);
        getSupportActionBar().setDisplayUseLogoEnabled(true);
        getSupportActionBar().setLogo(R.drawable.page_logo_2);

        go_layout = (Button)findViewById(R.id.go_to_page);
        go_layout.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent intent = new Intent(First_page.this, Full_page.class);
                startActivity(intent);

            }
        });
        mNavigationDrawer = (DrawerLayout) findViewById(R.id.drawer_layout);
        drawerFragment = (FragmentDrawer) getSupportFragmentManager().findFragmentById(R.id.fragment_navigation_drawer);
        drawerFragment.setUp(R.id.fragment_navigation_drawer, mNavigationDrawer, toolbar);
        drawerFragment.setDrawerListener(this);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }


    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        int id = item.getItemId();
        if (id == R.id.right_btn) {
            Toast.makeText(First_page.this, "Right_btn clicked", Toast.LENGTH_LONG).show();
            handleNavDrawer();
        }
        return super.onOptionsItemSelected(item);
    }

    @Override
    public void onDrawerItemSelected(View view, int position) {
    // Close the Nav Drawer
    // handleNavDrawer();
    }

    public void handleNavDrawer() {
        if (mNavigationDrawer.isDrawerOpen(GravityCompat.START)) {
            mNavigationDrawer.closeDrawer(GravityCompat.START);
        } else {
            mNavigationDrawer.openDrawer(GravityCompat.START);
        }
    }
}

Answer 2

我的方法是一个名为 "btnClickSideBar" 的 onClick。你可以随心所欲地称呼它。当您单击时，它将检查抽屉是打开还是关闭。如果它是打开我们的方法，它将关闭，如果它是关闭，抽屉将打开。

public void btnClickSideBar(View view) {

                if (drawerLayout.isDrawerOpen(drawerContainer)) {
                    drawerLayout.closeDrawers();
                } else {
                    drawerLayout.openDrawer(drawerContainer);
                }
            }

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