[英]Trouble importing android.support.v4 package
I'm trying to include the android-support-v4.jar into my command line android project. 我正在尝试将android-support-v4.jar包含到我的命令行android项目中。 My import statement is simply: 我的导入声明很简单:
import android.support.v4.NavUtils;
I've copied the jar from $ANDROID_HOME/extras/android/support/v4/android-support-v4.jar
into my project's libs/
folder but I still receive the following error upon building with ant
: 我已经将$ANDROID_HOME/extras/android/support/v4/android-support-v4.jar
的jar复制到我项目的libs/
文件夹中,但是在使用ant
构建时仍然收到以下错误:
package android.support.v4 does not exist
My understanding is that any jars placed in the libs/
folder are automatically included in the projects classpath. 我的理解是放在libs/
文件夹中的任何jar都会自动包含在项目类路径中。
As requested, the output of ls -l
on the root project folder is 根据要求,根项目文件夹中ls -l
的输出为
-rw-r--r-- 1 Nick staff 1192 4 Jan 15:08 AndroidManifest.xml
-rw-r--r-- 1 Nick staff 696 4 Jan 12:12 ant.properties
drwxr-xr-x 17 Nick staff 578 4 Jan 15:10 bin
-rw-r--r-- 1 Nick staff 3922 3 Jan 14:08 build.xml
drwxr-xr-x 4 Nick staff 136 3 Jan 15:11 gen
drwxr-xr-x 3 Nick staff 102 4 Jan 15:18 libs
-rw-r--r-- 1 Nick staff 441 3 Jan 14:08 local.properties
-rw-r--r-- 1 Nick staff 781 3 Jan 14:08 proguard-project.txt
-rw-r--r-- 1 Nick staff 563 3 Jan 14:08 project.properties
drwxr-xr-x 8 Nick staff 272 3 Jan 14:08 res
drwxr-xr-x 3 Nick staff 102 3 Jan 14:08 src
and the entire output from ant debug
is 并且ant debug
的整个输出是
Buildfile: /Users/Nick/DEVELOPMENT/PROJECTS/MyFirstApp/build.xml
-set-mode-check:
-set-debug-files:
-check-env:
[checkenv] Android SDK Tools Revision 21.0.1
[checkenv] Installed at /Users/Nick/Development/SDKS/android-sdk-macosx
-setup:
[echo] Project Name: MyFirstApp
[gettype] Project Type: Application
-set-debug-mode:
-debug-obfuscation-check:
-build-setup:
[echo] Resolving Build Target for MyFirstApp...
[gettarget] Project Target: Android 4.2
[gettarget] API level: 17
[echo] ----------
[echo] Creating output directories if needed...
[echo] ----------
[echo] Resolving Dependencies for MyFirstApp...
[dependency] Library dependencies:
[dependency] No Libraries
[echo] ----------
[echo] Building Libraries with 'debug'...
[subant] No sub-builds to iterate on
-pre-build:
-code-gen:
[mergemanifest] No changes in the AndroidManifest files.
[echo] Handling aidl files...
[aidl] No AIDL files to compile.
[echo] ----------
[echo] Handling RenderScript files...
[renderscript] No RenderScript files to compile.
[echo] ----------
[echo] Handling Resources...
[aapt] No changed resources. R.java and Manifest.java untouched.
[echo] ----------
[echo] Handling BuildConfig class...
[buildconfig] No need to generate new BuildConfig.
-pre-compile:
-compile:
[javac] Compiling 1 source file to /Users/Nick/DEVELOPMENT/PROJECTS/MyFirstApp/bin/classes
[javac] /Users/Nick/DEVELOPMENT/PROJECTS/MyFirstApp/src/com/example/myfirstapp/DisplayMessageActivity.java:9: package android.support.v4 does not exist
[javac] import android.support.v4.NavUtils;
[javac] ^
[javac] /Users/Nick/DEVELOPMENT/PROJECTS/MyFirstApp/src/com/example/myfirstapp/DisplayMessageActivity.java:36: cannot find symbol
[javac] symbol : variable NavUtils
[javac] location: class com.example.myfirstapp.DisplayMessageActivity
[javac] NavUtils.navigateUpFromSameTask(this);
[javac] ^
[javac] 2 errors
您的import语句不正确,它应该是:
import android.support.v4.app.NavUtils;
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