Android学习笔记-判断手机外部存储是否可读写

通过调用Environment的getExternalStorageState()方法来判断外部存储的状态:

/* 查检外部存储读取与写入功能是否可用 */
public boolean isExternalStorageWritable() {
    String state = Environment.getExternalStorageState();
    if (Environment.MEDIA_MOUNTED.equals(state)) {
        return true;
    }
    return false;
}

/*查检外部存储读取功能是否可用 */
public boolean isExternalStorageReadable() {
    String state = Environment.getExternalStorageState();
    if (Environment.MEDIA_MOUNTED.equals(state) ||
        Environment.MEDIA_MOUNTED_READ_ONLY.equals(state)) {
        return true;
    }
    return false;
}