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As 3.2 报红 cannot resolve symbol ...
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AS 3.2 报红 Cannot resolve symbol …

1.打开 build.gradle

2.哪个包有问题就把它的依赖先注释掉, 然后 Sync Project

    //implementation 'com.android.support.constraint:constraint-layout:1.1.3'

3.取消注释, 再 Sync Project

    implementation 'com.android.support.constraint:constraint-layout:1.1.3'

4.完成

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