我正在尝试为Linux中的离子构建android，但它向我显示了这样的错误

     [Error: Failed to find 'ANDROID_HOME' environment variable. 
      Try setting setting it manually.
      Failed to find 'android' command in your 'PATH'. 
      Try update your 'PATH' to include path to valid SDK directory.]
      ERROR building one of the platforms: Error: /home/kumar/myapp/platforms/android/cordova/build: Command failed with exit code 2
      You may not have the required environment or OS to build this project
      Error: /home/kumar/myapp/platforms/android/cordova/build: Command failed with exit code 2
at ChildProcess.whenDone (/usr/local/lib/node_modules/cordova/node_modules/cordova-lib/src/cordova/superspawn.js:139:23)
at ChildProcess.EventEmitter.emit (events.js:98:17)
at maybeClose (child_process.js:743:16)
at Process.ChildProcess._handle.onexit (child_process.js:810:5)

我已经在我的bashrc文件中添加了它

export ANT_HOME="/usr/bin/ant"
export PATH="$PATH:$ANT_HOME/bin"
export HOME="/home/kumar"
export ANDROID_HOME="$HOME/android-sdk-linux/tools"
export ANDROID_PLATFORM_TOOLS="$HOME/android-sdk-linux/platform-tools"
export PATH="$ANDROID_HOME:$ANDROID_PLATFORM_TOOLS:$PATH"

我想我已经给出了路径，但是我不知道为什么它向我显示此错误..请帮助…。