Question

我创建了一个带导航抽屉的应用程序，它工作正常，但唯一的问题是我看到两个工具栏。一个是ActionBartoggle按钮，另一个是默认按钮。现在我看到的教程在抽屉布局的主要内容中使用了工具栏，显然导航内容来自菜单。现在问题是我认为我们必须在Actionbardrawertoggle的构造函数中传递工具栏引用，并且在我正确传递它之后它工作正常，但我看到两个工具栏/动作栏。 基本上我的问题是如何获取主操作栏上的切换按钮而不是创建第二个工具栏？我尝试过使用

<style name="MyTheme" parent="android:Theme.Material.Light.NoActionBar">

它帮助我隐藏了上方的操作栏，但我认为这不是一个很好的方法。我正在上传输出和代码的截图：

<android.support.v4.widget.DrawerLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/drawerLayout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fitsSystemWindows="true">

    <!-- Page Content -->
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <android.support.v7.widget.Toolbar
            android:id="@+id/toolbar"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_alignParentTop="true"
            android:background="@color/colorPrimary"
            android:minHeight="?attr/actionBarSize"
            app:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"/>
    </LinearLayout>

    <!-- Navigation View -->
    <android.support.design.widget.NavigationView
        android:id="@+id/navigationView"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_gravity="start"

        app:itemTextColor="#5DADE2"

        app:menu="@menu/drawer_items"/>

</android.support.v4.widget.DrawerLayout>

Mainactivity：

 import android.content.DialogInterface;
    import android.content.Intent;
    import android.os.Bundle;
    import android.support.v7.app.AlertDialog;
    import android.support.v7.app.AppCompatActivity;
    import android.view.Menu;
    import android.view.MenuInflater;
    import android.view.MenuItem;
    import android.view.View;
    import android.widget.Button;
    import android.support.annotation.NonNull;
    import android.support.design.widget.NavigationView;
    import android.support.v4.view.GravityCompat;
    import android.support.v4.widget.DrawerLayout;
    import android.support.v7.app.ActionBarDrawerToggle;
    import android.support.v7.app.AppCompatActivity;
    import android.os.Bundle;
    import android.support.v7.widget.Toolbar;
    import android.view.MenuItem;
    import android.view.View;
    import android.view.Window;
    import android.widget.Toast;    
    import java.util.HashMap;    
    import android.content.DialogInterface;
    import android.content.Intent;
    import android.support.v7.app.AlertDialog;
    import android.support.v7.app.AppCompatActivity;
    import android.os.Bundle;
    import android.view.View;
    import android.widget.Button;    
    import java.util.HashMap;

public class MainActivity extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener{
    SessionManager session;

    private Toolbar mToolbar;
    private DrawerLayout mDrawerLayout;
    ActionBarDrawerToggle drawerToggle;

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

        setupToolbarMenu();
        setupNavigationDrawerMenu();    

    }


    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle item selection
        switch (item.getItemId()) {
            case R.id.lg:

                session.logoutUser();
                return true;

            default:
                return super.onOptionsItemSelected(item);
        }
    } private void setupToolbarMenu() {

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

        mToolbar.setTitle("Home Page");
    }

    private void setupNavigationDrawerMenu() {

        NavigationView navigationView = (NavigationView) findViewById(R.id.navigationView);
        mDrawerLayout = (DrawerLayout) findViewById(R.id.drawerLayout);
        navigationView.setNavigationItemSelectedListener(this);
        navigationView.setItemIconTintList(null);

        drawerToggle = new ActionBarDrawerToggle(this,
                mDrawerLayout,mToolbar,
                R.string.drawer_open,
                R.string.drawer_close);

        mDrawerLayout.addDrawerListener(drawerToggle);

        drawerToggle.syncState();

    }  @Override // Called when Any Navigation Item is Clicked
    public boolean onNavigationItemSelected(@NonNull MenuItem menuItem) {

        closeDrawer();

        switch (menuItem.getItemId()) {

            case R.id.home:
                // Put your Item specific Code here
                break;

            case R.id.invoice:
                Intent intent = new Intent(this,details.class);
                startActivity(intent);
                // Put your item specific Code here
                break;
        }

        return true;
    }

    // Close the Drawer
    private void closeDrawer() {
        mDrawerLayout.closeDrawer(GravityCompat.START);
    }

    // Open the Drawer
    private void showDrawer() {
        mDrawerLayout.openDrawer(GravityCompat.START);
    }


    @Override
    public void onBackPressed() {
        if (mDrawerLayout.isDrawerOpen(GravityCompat.START))
            closeDrawer();
        else{
        new AlertDialog.Builder(this).setIcon(android.R.drawable.ic_dialog_alert).setTitle("Exit")
                .setMessage("Are you sure?")
                .setPositiveButton("yes", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {

                        Intent intent = new Intent(Intent.ACTION_MAIN);
                        intent.addCategory(Intent.CATEGORY_HOME);
                        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                        startActivity(intent);
                        finish();
                    }
                }).setNegativeButton("no", null).show();}
    }     
}

我的styles.xml文件：

<resources>
        <!-- Base application theme. -->
<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
    <!-- Customize your theme here. -->
    <item name="colorPrimary">@color/colorPrimary</item>
    <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
    <item name="colorAccent">@color/colorAccent</item>
</style>     
    </resources>

我知道这可能没用，但这里也是我的清单文件：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android">

    <uses-permission android:name="android.permission.INTERNET"/>

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">

        <activity android:name=".details" />
        <activity android:name=".Login"
            android:label="Login"/>

        <activity android:name=".MainActivity" />
        <activity android:name=".recycler" />
        <activity android:name=".RegisterActivity" />
        <activity android:name=".SplashScreen">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>        
    </application>    
</manifest>

这是我得到的输出：

Answer 1

尝试按照此示例：https://developer.android.com/training/appbar/setting-up.html

你会发现这个：

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_my);
    Toolbar myToolbar = (Toolbar) findViewById(R.id.my_toolbar);
    setSupportActionBar(myToolbar);
    }

你缺少的是：setSupportActionBar(myToolbar);

为什么在创建具有导航抽屉的应用时会看到两个工具栏？

1 个答案: