Ubuntu 64位，Android studio 的安装，配置和使用
1 Download it.
2 设置环境变量：
export ANDROID_STUDIO=/home/usrname/Documents/android-studio/bin
export PATH=${ANDROID_STUDIO}:$PATH
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这样任何界面，都可以studio.sh启动。
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3 下载gradle-1.8-bin.zip总是失败。
修改 studio/bin/studio64.vmoptions
-Djava.net.preferIPv4Stack=true ?
-Didea.updates.url=http://dl.google.com/android/studio/patches/updates.xml ?
-Didea.patches.url=http://dl.google.com/android/studio/patches/ ?
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将gradle-1.8-bin.zip放入~/.gradle/wrapper/dists/gradle-1.８-bin/72srdo3a5eb3bic159kar72vok/文件夹中，重启android studio
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4 ?WARN - ateSettings.impl.UpdateChecker - Connection failed.
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配置 ?~/.AndroidStudio/config/options/other.xml
<?xml version="1.0" encoding="UTF-8"?>
<application>
? <component name="HttpConfigurable">
? ? <option name="USE_HTTP_PROXY" value="true" />
? ? <option name="PROXY_HOST" value="127.0.0.1" />
? ? <option name="PROXY_PORT" value="3128" />
? </component>
</application>
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change 127.0.0.1 to your real proxy.
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7
error 1 ：No cached version listing for com.android.tools.build:gradle:0.12.+ available for offline mode.
check "Offline work" in File>Settings>Gradle>Global Gradle Settings
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8 jdk setting
执行下面命令，配置需要默认的JDK
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sudo update-alternatives --config java ?
会列出jdk版本，其中被“*”标注的为默认JDK。如果要维持当前默认JDK，直接按回车键即可；否则输入相应JDK的编号将其设置为默认版本。
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9 A problem occurred configuring project ':Application'.
> Could not resolve all dependencies for configuration ':Application:_debugCompile'.
? ?> Could not find any version that matches com.android.support:support-v4:21.+.
? ? ?Required by:
? ? ? ? ?BasicNotifications:Application:unspecified
? ?> Could not find any version that matches com.android.support:gridlayout-v7:21.+.
? ? ?Required by:
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sloution: update and download any missing build-tools and make sure you update the Android Support Repository and Android Support Library under Extras. Restart Android Studio after the SDK Manager finishes
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