我想使用以下库：
compile "com.android.support:support-v4:+"
compile 'com.squareup.picasso:picasso:2.3.2'
compile 'com.nineoldandroids:library:2.4.0'
compile 'com.daimajia.slider:library:1.1.5@aar'
但是以下发生错误：
Unable to resolve dependency for ':app@debug/compileClasspath': Could not resolve com.squareup.picasso:picasso:2.3.2.
Unable to resolve dependency for ':app@debug/compileClasspath': Could not resolve com.nineoldandroids:library:2.4.0.
Unable to resolve dependency for ':app@debug/compileClasspath': Could not resolve com.daimajia.slider:library:1.1.5.
Unable to resolve dependency for ':app@debugAndroidTest/compileClasspath': Could not resolve com.squareup.picasso:picasso:2.3.2.
Unable to resolve dependency for ':app@debugAndroidTest/compileClasspath': Could not resolve com.nineoldandroids:library:2.4.0.
Unable to resolve dependency for ':app@debugAndroidTest/compileClasspath': Could not resolve com.daimajia.slider:library:1.1.5.
Unable to resolve dependency for ':app@debugUnitTest/compileClasspath': Could not resolve com.squareup.picasso:picasso:2.3.2.
Unable to resolve dependency for ':app@debugUnitTest/compileClasspath': Could not resolve com.nineoldandroids:library:2.4.0.
Unable to resolve dependency for ':app@debugUnitTest/compileClasspath': Could not resolve com.daimajia.slider:library:1.1.5.