导航抽屉问题(不显示布局预览) [英] navigation drawer issue (not showing layout preview)

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问题描述

我创建了该应用程序,并且想使用导航抽屉菜单,但是当我尝试在导航抽屉xml中进行编辑时,出现了等待构建完成..."的问题,并且我看不到布局的前一页android studio的左侧

I created the app and I want to use navigation drawer menu, but when I tried to edit in navigation drawer xml, then the problem "Waiting for build to finish..." happened and I don't see layout previw on left side of android studio

联系

在这里找不到layout_preview

layout_preview not found here

我尝试了灵魂来解决此问题,但不幸的是对我不起作用

I tried this soultion to solve this issue but unfortunately not working for me

这是activity_main_drawer.xml

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

    <group android:checkableBehavior="single">
        <item
            android:id="@+id/articles"
            android:icon="@drawable/ic_menu_camera"
            android:title="@string/articles" />
        <item
            android:id="@+id/windows"
            android:icon="@drawable/ic_menu_gallery"
            android:title="@string/windows" />
        <item
            android:id="@+id/linux"
            android:icon="@drawable/ic_menu_slideshow"
            android:title="@string/linux" />
        <item
            android:id="@+id/miscellaneous_devices"
            android:icon="@drawable/ic_menu_manage"
            android:title="@string/miscellaneous_devices" />

        <item
            android:id="@+id/information_security"
            android:icon="@drawable/ic_menu_manage"
            android:title="@string/information_security" />

        <item
            android:id="@+id/facebook"
            android:icon="@drawable/ic_menu_manage"
            android:title="@string/facebook" />
    </group>

    <item android:title="Communicate">
        <menu>
            <item
                android:id="@+id/nav_share"
                android:icon="@drawable/ic_menu_share"
                android:title="Share" />
            <item
                android:id="@+id/nav_send"
                android:icon="@drawable/ic_menu_send"
                android:title="Send" />
        </menu>
    </item>

</menu>

activity_main

    package www.pro.cs_is.com.procsis;

import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.view.View;
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.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;

public class MainActivity extends AppCompatActivity
        implements NavigationView.OnNavigationItemSelectedListener {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);



        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
        ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
                this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
        drawer.addDrawerListener(toggle);
        toggle.syncState();

        NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
        navigationView.setNavigationItemSelectedListener(this);
    }

    @Override
    public void onBackPressed() {
        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
        if (drawer.isDrawerOpen(GravityCompat.START)) {
            drawer.closeDrawer(GravityCompat.START);
        } else {
            super.onBackPressed();
        }
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.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);
    }

    @SuppressWarnings("StatementWithEmptyBody")
    @Override
    public boolean onNavigationItemSelected(MenuItem item) {
        // Handle navigation view item clicks here.
        int id = item.getItemId();

        if (id == R.id.miscellaneous_devices) {
            // Handle the camera action
        } else if (id == R.id.articles) {

        } else if (id == R.id.windows) {

        } else if (id == R.id.linux) {

        } else if (id == R.id.facebook) {

        } else if (id == R.id.information_security) {

        }

        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
        drawer.closeDrawer(GravityCompat.START);
        return true;
    }
}

更新1 :经过多次尝试,在将IDE更新到版本3.1.2之后,这似乎是一个普遍的问题,到目前为止,只有一个

Update 1 : After many attempts it's seems a general Issue after update IDE to version 3.1.2, till now there's only one solution which @mtak suggested although it is similar to the top menu options in the preview

推荐答案

删除行

tools:showIn="navigation_view"

从activity_main_drawer.xml进行重建. 这为我解决了同样的问题. 不知道为什么!

from activity_main_drawer.xml and rebuild. This solved the same problem for me. Don't know why!!!

问题已在AS 3.1.3中解决(2018年6月8日),并且再次出现(2018年6月16日)!!!

Problem solved in AS 3.1.3(8 June 2018) and reappeared again (16 June 2018)!!!

新的临时解决方法:

  1. 从菜单文件中剪切行tools:showIn="navigation_view".
  2. 关闭菜单文件.
  3. 重新打开它并粘贴行.
  4. 进行设计并按原样查看菜单.
  1. Cut the line tools:showIn="navigation_view" from the menu file.
  2. Close the menu file.
  3. Reopen it and paste the line.
  4. Go to design and see the menu as it should be.

如果关闭菜单文件然后重新打开,问题又回来了! 文本中仍然没有预览.

If you close the menu file and reopen it the problem comes back! Still no preview in Text.

这篇关于导航抽屉问题(不显示布局预览)的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!

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