le9406的博客

1.添加对SD卡操作的权限 <!-- 读取SD的权限 --> <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/> <!-- 写入SD卡的权限 --> <uses-permission android:name="android.perm...

1.activity_main.xml <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_...

1.activity_main.xml 布局 <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layo...