android 國內無法下載leakcanary

buildscript {
repositories {
jcenter()
mavenCentral()
}
dependencies {
classpath 'com.android.tools.build:gradle:2.1.2'
}

}

allprojects{
repositories{
jcenter()
mavenCentral()
}
}
apply plugin: 'android'

dependencies {
compile fileTree(include: '*.jar', dir: 'libs')
// compile 'com.android.support:support-v4:18.0.0'
compile 'com.android.support:multidex:1.0.1'
compile 'com.android.support:recyclerview-v7:24.0.0-alpha1'
compile 'com.android.support:support-v4:24.0.0-alpha1'
debugCompile 'com.squareup.leakcanary:leakcanary-android:1.4-beta2'
releaseCompile 'com.squareup.leakcanary:leakcanary-android-no-op:1.4-beta2'
testCompile 'com.squareup.leakcanary:leakcanary-android-no-op:1.4-beta2'
}