AS报错：lambda expressions are not supported at this language level

AS报错：lambda expressions are not supported at this language level

• Solution

1. Open Open File -> Project Stucture select Modules (Chinese were, respectively: File -> project structure) shown in FIG.
2. Select the corresponding items, such as pictures among app project, default Source Compatibility and Target Compatibility are empty. Then modified as follows:

1) Source Compatibility choice 1.8;

2) Target Compatibility Select 1.8.

• Click Apply to.