1. 建立libs文件夹,与src同级
2. libs 右键 import -> filesystems -> sdk路径:extras/android/support/v4
3. libs-> android-support-v4.jar 右键add build path
1. 建立libs文件夹,与src同级
2. libs 右键 import -> filesystems -> sdk路径:extras/android/support/v4
3. libs-> android-support-v4.jar 右键add build path