找不到符号变量drawer_layout

Question

我一直在尝试在Android中实现导航抽屉。在整个实施过程中，我一直关注this。似乎drawer_layout没有从R文件中解析出来。我似乎无法找到我出错的地方。这是我的代码：

MainActivity.java

package com.project.breadcrumbs.activity;

import android.content.Intent;
import android.os.Bundle;

import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;

import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

import com.project.breadcrumbs.R;
import com.project.breadcrumbs.helper.SQLiteHandler;
import com.project.breadcrumbs.helper.SessionManager;

import java.util.HashMap;

public class MainActivity extends AppCompatActivity implements FragmentDrawer.FragmentDrawerListener {
    private Toolbar mToolbar;
    private FragmentDrawer drawerFragment;
    private DrawerLayout mDrawerLayout;

    private TextView txtName;
    private TextView txtEmail;
    private Button btnLogout;

    private SQLiteHandler db;
    private SessionManager session;

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

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

        setSupportActionBar(mToolbar);
        getSupportActionBar().setDisplayShowHomeEnabled(true);

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

        txtName = (TextView) findViewById(R.id.name);
        txtEmail = (TextView) findViewById(R.id.email);
        btnLogout = (Button) findViewById(R.id.btnLogout);
        // SqLite database handler
        db = new SQLiteHandler(getApplicationContext());

        // session manager
        session = new SessionManager(getApplicationContext());

        if (!session.isLoggedIn()) {
            logoutUser();
        }

        // Fetching user details from sqlite
        HashMap<String, String> user = db.getUserDetails();

        String name = user.get("name");
        String email = user.get("email");

        // Displaying the user details on the screen
        txtName.setText(name);
        txtEmail.setText(email);





        // Logout button click event
        btnLogout.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                logoutUser();
            }
        });

    }

    @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.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }

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

    }

    /**
     * Logging out the user. Will set isLoggedIn flag to false in shared
     * preferences Clears the user data from sqlite users table
     * */
    private void logoutUser() {
        session.setLogin(false);

        db.deleteUsers();

        // Launching the login activity
        Intent intent = new Intent(MainActivity.this, LoginActivity.class);
        startActivity(intent);
        finish();
    }
}

activity_main.xml中

<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="${relativePackage}.${activityClass}">
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">
        <LinearLayout
            android:id="@+id/container_toolbar"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="vertical">
            <include
                android:id="@+id/toolbar"
                layout="@layout/toolbar" />

        </LinearLayout>
        <FrameLayout
            android:id="@+id/container_body"
            android:layout_width="fill_parent"
            android:layout_height="0dp"
            android:layout_weight="1" />
    </LinearLayout>

    <fragment
        android:id="@+id/fragment_navigation_drawer"
        android:name="com.project.breadcrumbs.activity.FragmentDrawer"
        android:layout_width="@dimen/nav_drawer_width"
        android:layout_height="match_parent"
        android:layout_gravity="start"
        app:layout="@layout/fragment_navigation_drawer"
        tools:layout="@layout/fragment_navigation_drawer">

        <LinearLayout
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:layout_centerInParent="true"
            android:layout_marginLeft="20dp"
            android:layout_marginRight="20dp"
            android:gravity="center"
            android:orientation="vertical" >

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@string/welcome"
                android:textSize="20dp" />

            <TextView
                android:id="@+id/name"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:padding="10dp"
                android:textColor="@color/lbl_name"
                android:textSize="24dp" />

            <TextView
                android:id="@+id/email"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textSize="13dp" />

            <Button
                android:id="@+id/btnLogout"
                android:layout_width="fill_parent"
                android:layout_height="wrap_content"
                android:layout_marginTop="40dip"
                android:background="@color/btn_logut_bg"
                android:text="@string/btn_logout"
                android:textAllCaps="false"
                android:textColor="@color/white"
                android:textSize="15dp" />
        </LinearLayout>
    </fragment>

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

我尝试了'dependencies' cannot be applied to '(groovy.lang.Closure)'并试图清理然后重建项目。

Answer 1

在您的DrawerLayout 添加抽屉 ID ：

has_one: association