Android Studio疑难解决

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导入第三方类库错误：Could not find com.github.* :{jitpack-release}

在使用progresshint 的第三方库时，直接在gradle中添加

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repositories {  
  jcenter()  
  maven { url "https://jitpack.io" }  
}  
dependencies {  
  compile 'com.github.techery.progresshint:library-addition:{jitpack-release}'  
}

但是爆出了错误

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Error:Could not find com.github.techery.progresshint:library-addition:{jitpack-release}.  
Required by:  
    wnacg:app:unspecified  
Search in build.gradle files

把**{jitpack-release}换成版本号**就可以了
解决代码

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repositories {  
  jcenter()  
  maven { url "https://jitpack.io" }  
}  
dependencies {  
  compile 'com.github.techery.progresshint:library-addition:0.2.3'  
}

找不到v4、v7包

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 Rendering Problems Missing styles. Is the correct theme chosen for this layout?  Use the Theme combo box above the layout to choose a different layout, or fix the theme style references.  The following classes could not be found:  
- android.support.v7.widget.AppCompatSeekBar (Fix Build Path, Create Class)  
- android.support.v7.widget.RecyclerView (Fix Build Path, Create Class)  
 Tip: Try to build the project.  Failed to find style 'textViewStyle' in current theme (62 similar errors not shown)

检查了gradle中是否有导入

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compile 'com.android.support:support-v4:23.4.0'  
compile 'com.android.support:appcompat-v7:23.4.0'  
compile 'com.android.support:design:23.4.0'

仍然找不到v4、v7包
最后在SDK Manager中发现Android Support Library的版本号才更新到23.2.1
换成23.2.1就好了