Android R. 无法在可绘制文件夹中找到选项卡（清理和重建后的前夕）

Question

刚刚返回到我前几天正在工作的项目 - 当我离开它时，它是运行，今天 错误：（67、93）错误：找不到符号变量drawtab1。清单可能有问题，尝试重建和清理。但是 drawtab1 没有显示..

TabHost tabHost = getTabHost();

        // Tab for login
        TabSpec Login = tabHost.newTabSpec("Login");
        // setting Title and Icon for the Tab
        Login.setIndicator("", getApplicationContext().getResources().getDrawable(R.drawable.drawtab1));
        Intent LoginIntent = new Intent(this, Tab1Activity.class);
        LoginIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
        Login.setContent(LoginIntent);

这是drawtab1

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <!-- When selected -->
    <item android:drawable="@drawable/login"
          android:state_selected="true" />
    <!-- When not selected -->
    <item android:drawable="@drawable/login" />
</selector>

这是Mainfest

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.tabdemo"
    android:versionCode="1"
    android:versionName="1.0" >
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />

    <uses-sdk
        android:minSdkVersion="22"
        android:targetSdkVersion="22" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name=".MainActivity"
            android:label="@string/app_name" 
            android:theme="@android:style/Theme.NoTitleBar"



            >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity
            android:name=".Tab1Activity"
            android:label="@string/title_activity_tab1" >
        </activity>
        <activity
            android:name=".Tab2Activity"
            android:label="@string/title_activity_tab2" >
        </activity>
        <activity
            android:name=".Tab3Activity"
            android:label="@string/title_activity_tab3" >
        </activity>


    </application>

</manifest>

如有任何帮助，我们将不胜感激。

Answer 1

这里可能有一些情况

 1. make sure there is not import android.R import statement.
 2. no error in typos in xml file.
 3. use only a-z and 0-9 for resource name it must not contain any capital letters or special symbol. Then clean and sync your project.

Android R. 无法在可绘制文件夹中找到选项卡（清理和重建后的前夕）

Android R. Cant find tab in drawable folder (eve after cleaned and rebuild)

android

android-tabhost

android-drawable